Setting up LVGL+Micropython on ESP32-S3-Touch-LCD-4.3 from WaveShare #142

Type-32 · 2024-10-06T08:39:34Z

Type-32
Oct 6, 2024

This here is the board I have and are referencing: ESP32-S3-Touch-LCD-4.3 from WaveShare

I modified the python code that @kdschlosser provided in #138 and flashed it into my board.

import time
import network

def connect_wifi(ssid, password):
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print('Connecting to WiFi...')
        wlan.connect(ssid, password)
        while not wlan.isconnected():
            print('WiFi is not connected...', wlan.ifconfig())
            time.sleep(1)
    print('WiFi connected:', wlan.ifconfig())

from micropython import const  # NOQA
from i2c import I2C
import gt911
import lcd_bus
import task_handler
import lvgl as lv  # NOQA
import rgb_display


_WIDTH = const(800)
_HEIGHT = const(480)

_BUFFER_SIZE = const(768000)

_CTP_SCL = const(9)
_CTP_SDA = const(8)
_CTP_IRQ = const(4)

_SD_MOSI = const(11)
_SD_SCK = const(12)
_SD_MISO = const(13)

_LCD_FREQ = const(13000000)
_PCLK_ACTIVE_NEG = const(0)

_HSYNC_PULSE_WIDTH = const(10)
_HSYNC_BACK_PORCH = const(10)
_HSYNC_FRONT_PORCH = const(10)

_VSYNC_PULSE_WIDTH = const(10)
_VSYNC_BACK_PORCH = const(10)
_VSYNC_FRONT_PORCH = const(20)

_PCLK = const(7)
_HSYNC = const(46)
_VSYNC = const(3)
_DE = const(5)
_DISP = None
_BCKL = None
_DRST = None


I2C_BUS = I2C.Bus(
    host=1,
    scl=_CTP_SCL,
    sda=_CTP_SDA,
    freq=400000,
    use_locks=False
)

TOUCH_DEVICE = I2C.Device(
    I2C_BUS,
    dev_id=gt911.I2C_ADDR,
    reg_bits=gt911.BITS
)

_DATA15 = const(10)  # B7
_DATA14 = const(17)  # B6
_DATA13 = const(18)  # B5
_DATA12 = const(38)  # B4
_DATA11 = const(14)  # B3
_DATA10 = const(21)  # G7
_DATA9 = const(47)  # G6
_DATA8 = const(48)  # G5
_DATA7 = const(45)  # G4
_DATA6 = const(0)  # G3
_DATA5 = const(39)  # G2
_DATA4 = const(40)  # R7
_DATA3 = const(41)  # R6
_DATA2 = const(42)  # R5
_DATA1 = const(2)  # R4
_DATA0 = const(1)  # R3


bus = lcd_bus.RGBBus(
    hsync=_HSYNC,
    vsync=_VSYNC,
    de=_DE,
    pclk=_PCLK,
    disp=1,
    data0=_DATA0,
    data1=_DATA1,
    data2=_DATA2,
    data3=_DATA3,
    data4=_DATA4,
    data5=_DATA5,
    data6=_DATA6,
    data7=_DATA7,
    # I had to remove the following lines because it keeps giving me an error when running the program, excess params
    # data8=_DATA8,
    # data9=_DATA9,
    # data10=_DATA10,
    # data11=_DATA11,
    # data12=_DATA12,
    # data13=_DATA13,
    # data14=_DATA14,
    # data15=_DATA15,
    # data_pins=(
    #     _DATA0,
    #     _DATA1,
    #     _DATA2,
    #     _DATA3,
    #     _DATA4,
    #     _DATA5,
    #     _DATA6,
    #     _DATA7,
    #     _DATA8,
    #     _DATA9,
    #     _DATA10,
    #     _DATA11,
    #     _DATA12,
    #     _DATA13,
    #     _DATA14,
    #     _DATA15
    # ),
    freq=_LCD_FREQ,
    hsync_front_porch=_HSYNC_FRONT_PORCH,
    hsync_back_porch=_HSYNC_BACK_PORCH,
    hsync_pulse_width=_HSYNC_PULSE_WIDTH,
    hsync_idle_low=False,
    vsync_front_porch=_VSYNC_FRONT_PORCH,
    vsync_back_porch=_VSYNC_BACK_PORCH,
    vsync_pulse_width=_VSYNC_PULSE_WIDTH,
    vsync_idle_low=False,
    de_idle_high=False,
    pclk_idle_high=False,
    pclk_active_low=_PCLK_ACTIVE_NEG,
)


buf = bus.allocate_framebuffer(_BUFFER_SIZE, lcd_bus.MEMORY_SPIRAM)

display = rgb_display.RGBDisplay(
    data_bus=bus,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    frame_buffer1=buf,
    frame_buffer2=None,
    color_space=lv.COLOR_FORMAT.RGB565,
    rgb565_byte_swap=True
)

display.set_power(True)
display.init()
display.set_backlight(100)
indev = gt911.GT911(TOUCH_DEVICE)

# display.set_rotation(lv.DISPLAY_ROTATION._90)  # NOQA

lv.init()
scrn = lv.obj()

btn = lv.button(scrn)
btn.center()

scrn.set_style_bg_color(lv.color_hex(0x000000), 0)
lv.screen_load(scrn)
lv.screen_active()

task_handler.TaskHandler()

After flashing it, the board screen glows white (which is better than showing nothing since the last five days I've been trying to get it to show something other than nothing). But after flashing the python program on to it, I can't connect the REPL anymore, including flashing any other python code on to the board.

Am I doing something wrong here, or is there something weird with the code I modified...? I honestly am a complete amateur to this type of development and I would appreciate any help (scolding also works). I'd also appreciate if there's other resources I can reference off of.

kdschlosser · 2024-10-06T15:57:52Z

kdschlosser
Oct 6, 2024
Maintainer

I just recently made some changes that I am going to revert. I have to mess around with testing them locally to find out why they are not working properly.

1 reply

Type-32 Oct 6, 2024
Author

so it's not an issue with the code?

Type-32 · 2024-10-06T17:26:15Z

Type-32
Oct 6, 2024
Author

Status update: i uncommented these lines:

    # data8=_DATA8,
    # data9=_DATA9,
    # data10=_DATA10,
    # data11=_DATA11,
    # data12=_DATA12,
    # data13=_DATA13,
    # data14=_DATA14,
    # data15=_DATA15,

and now it looks like this

Still can't access the REPL after flashing the code as well.

0 replies

kdschlosser · 2024-10-06T20:06:31Z

kdschlosser
Oct 6, 2024
Maintainer

Plug your USB cable into the other USB port. That is the reason why you are not able to access the REPL.

5 replies

Type-32 Oct 7, 2024
Author

I tried UART as well, which doesn't work

kdschlosser Oct 7, 2024
Maintainer

have you tried using vanilla MicroPython to see if you get a REPL??

Type-32 Oct 7, 2024
Author

Vanilla MicroPython works fine. I also tried the build command you gave at the next comment.
output.txt

I've updated the repo on my end and the build command failed.

Type-32 Oct 7, 2024
Author

Update: I tried using my own build command but also failed. I think it's something with the rgb_bus.c.

kdschlosser Oct 7, 2024
Maintainer

OK the RGB Bus is fixed.

kdschlosser · 2024-10-06T20:11:15Z

kdschlosser
Oct 6, 2024
Maintainer

This is the build command I use for that display...

python3 make.py esp32 BOARD=ESP32_GENERIC_S3 BOARD_VARIANT=SPIRAM_OCT --flash-size=8 DISPLAY=rgb_display INDEV=gt911 CONFIG_FREERTOS_HZ=1000 CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240=y CONFIG_ESPTOOLPY_FLASHMODE_QIO=y CONFIG_ESPTOOLPY_FLASHFREQ_120M=y CONFIG_IDF_EXPERIMENTAL_FEATURES=y and CONFIG_SPIRAM_SPEED_120M=y CONFIG_SPIRAM_FETCH_INSTRUCTIONS=y CONFIG_SPIRAM_RODATA=y CONFIG_ESP32S3_DATA_CACHE_LINE_64B=y CONFIG_COMPILER_OPTIMIZATION_PERF=y

and this is the code that I use to initialize the display...

from micropython import const  # NOQA
from i2c import I2C
import gt911
import lcd_bus
import task_handler
import lvgl as lv  # NOQA
import rgb_display


_WIDTH = const(800)
_HEIGHT = const(480)

_BUFFER_SIZE = const(76800)

_CTP_SCL = const(9)
_CTP_SDA = const(8)
_CTP_IRQ = const(4)

_SD_MOSI = const(11)
_SD_SCK = const(12)
_SD_MISO = const(13)

_LCD_FREQ = const(13000000)
_PCLK_ACTIVE_NEG = const(0)

_HSYNC_PULSE_WIDTH = const(10)
_HSYNC_BACK_PORCH = const(10)
_HSYNC_FRONT_PORCH = const(10)

_VSYNC_PULSE_WIDTH = const(10)
_VSYNC_BACK_PORCH = const(10)
_VSYNC_FRONT_PORCH = const(20)

_PCLK = const(7)
_HSYNC = const(46)
_VSYNC = const(3)
_DE = const(5)
_DISP = None
_BCKL = None
_DRST = None


I2C_BUS = I2C.Bus(
    host=1,
    scl=_CTP_SCL,
    sda=_CTP_SDA,
    freq=400000,
    use_locks=False
)

TOUCH_DEVICE = I2C.Device(
    I2C_BUS,
    dev_id=gt911.I2C_ADDR,
    reg_bits=gt911.BITS
)

_DATA15 = const(10)  # B7
_DATA14 = const(17)  # B6
_DATA13 = const(18)  # B5
_DATA12 = const(38)  # B4
_DATA11 = const(14)  # B3
_DATA10 = const(21)  # G7
_DATA9 = const(47)  # G6
_DATA8 = const(48)  # G5
_DATA7 = const(45)  # G4
_DATA6 = const(0)  # G3
_DATA5 = const(39)  # G2
_DATA4 = const(40)  # R7
_DATA3 = const(41)  # R6
_DATA2 = const(42)  # R5
_DATA1 = const(2)  # R4
_DATA0 = const(1)  # R3


bus = lcd_bus.RGBBus(
    hsync=_HSYNC,
    vsync=_VSYNC,
    de=_DE,
    pclk=_PCLK,
    data0=_DATA0,
    data1=_DATA1,
    data2=_DATA2,
    data3=_DATA3,
    data4=_DATA4,
    data5=_DATA5,
    data6=_DATA6,
    data7=_DATA7,
    data8= _DATA8,
    data9=_DATA9,
    data10= _DATA10,
    data11= _DATA11,
    data12=_DATA12,
    data13=_DATA13,
    data14=_DATA14,
    data15=_DATA15,
    freq=_LCD_FREQ,
    hsync_front_porch=_HSYNC_FRONT_PORCH,
    hsync_back_porch=_HSYNC_BACK_PORCH,
    hsync_pulse_width=_HSYNC_PULSE_WIDTH,
    hsync_idle_low=False,
    vsync_front_porch=_VSYNC_FRONT_PORCH,
    vsync_back_porch=_VSYNC_BACK_PORCH,
    vsync_pulse_width=_VSYNC_PULSE_WIDTH,
    vsync_idle_low=False,
    de_idle_high=False,
    pclk_idle_high=False,
    pclk_active_low=_PCLK_ACTIVE_NEG,
)


buf1 = bus.allocate_framebuffer(_BUFFER_SIZE, lcd_bus.MEMORY_SPIRAM)
buf2 = bus.allocate_framebuffer(_BUFFER_SIZE, lcd_bus.MEMORY_SPIRAM)

display = rgb_display.RGBDisplay(
    data_bus=bus,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    frame_buffer1=buf1,
    frame_buffer2=buf2,
    color_space=lv.COLOR_FORMAT.RGB565,
    rgb565_byte_swap=True
)

display.set_power(True)
display.init()
display.set_backlight(100)
indev = gt911.GT911(TOUCH_DEVICE)


if indev.hw_size != (_WIDTH, _HEIGHT):
    fw_config = indev.firmware_config
    fw_config.width = _WIDTH
    fw_config.height = _HEIGHT
    fw_config.save()

    del fw_config
    

# display.set_rotation(lv.DISPLAY_ROTATION._90)  # NOQA

scrn = lv.screen_active()
scrn.set_style_bg_color(lv.color_hex(0x000000), 0)

slider = lv.slider(scrn)
slider.center()

task_handler.TaskHandler()

3 replies

kdschlosser Oct 6, 2024
Maintainer

That build command overclocks the SPI bus for the flash and for the SPIRAM to get some additional speed out of it so the display updates faster. The resolution of the display is pretty high and that is going to take a while for it to update....

kdschlosser Oct 6, 2024
Maintainer

ooops. I have to edit that code. There is a mistake in it... I will fix it now...

EDIT

All fixed.

kdschlosser Oct 6, 2024
Maintainer

I would leave the WiFi out for the time being. Once the display is up and running then worry about adding the WiFi back in.

Type-32 · 2024-10-07T10:08:27Z

Type-32
Oct 7, 2024
Author

The display is running successfully. I can now see a slider.

Is there extra documentation for LVGL+MicroPython for V9.x?

12 replies

kdschlosser Oct 8, 2024
Maintainer

I am working on generating documentation. and you are correct it is not easy to do.

I did write a script at onme point that enumerated the entire LVGL module and it spat out the complete API, If you give me 15 minutes I can write it again and at least provide you with a picture of what the API looks like.

Type-32 Oct 8, 2024
Author

I'd be more grateful if that can be a thing, but then again, I'm already grateful for the existence of this project. This is some amazing work. :) <3

kdschlosser Oct 8, 2024
Maintainer

api.txt

Now the function parameters are not in that and neither are the fields for structures. Unfortunately there is only so much I am able to traverse through to collect the information. Al least you will get a basic understand of the layout of things.

kdschlosser Oct 8, 2024
Maintainer

I do have a card inserted though... maybe it's loose or something? I'll try later.

The card readers can be real fickle about the card you are using. While the slot is called an SD Card slot you need to be using MMC cards. SD cards support encryption which the SPI (MMC) variant doesn't. You can use an MMC card in an SD card slot but you cannot use an SD card in an MMC slot. The slot you are using is an MMC slot.

Type-32 Oct 8, 2024
Author

that's good to know. Thank you for the elaboration :)

kdschlosser · 2024-10-08T02:35:22Z

kdschlosser
Oct 8, 2024
Maintainer

I found a better way of generating the code that is used in the binding and at some point I will write the generator code over again. The way it has been done is not the most efficient...

0 replies

Type-32 · 2024-10-09T00:18:30Z

Type-32
Oct 9, 2024
Author

How do I rotate the UI display from a horizontal display to a vertical display?

0 replies

Type-32 · 2024-10-09T03:08:39Z

Type-32
Oct 9, 2024
Author

~~Found a great tool for making LVGL V9.x UI and exporting as MicroPython: Squareline Studio~~
Squareline Studio does work to some extent, but most of the times the stuff it generates would throw weird errors. If you must use the software, maybe try designing the UI and then export it in python, then copy the parts that are usable to your test code.

At least this is my workflow for now, which I know is not the best (but it's the only way I currently know) and am sure will change in the future.

2 replies

Type-32 Oct 9, 2024
Author

Okay... this may need some tweaking...

A fatal error occurred. The crash dump printed below may be used to help
determine what caused it. If you are not already running the most recent
version of MicroPython, consider upgrading. New versions often fix bugs.

To learn more about how to debug and/or report this crash visit the wiki
page at: https://github.com/micropython/micropython/wiki/ESP32-debugging

LVGL MPY version : 1.23.0 on 2024-10-07
IDF version : v5.2
Machine     : Generic ESP32S3 module with Octal-SPIRAM with ESP32S3

Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.

Core  1 register dump:
PC      : 0x42081926  PS      : 0x00060d30  A0      : 0x820816fd  A1      : 0x3fcbe8f0  
A2      : 0x3c253550  A3      : 0x3c1d49d4  A4      : 0x00000005  A5      : 0x3c253532  
A6      : 0x000000f4  A7      : 0x3fcbe8f0  A8      : 0x81165115  A9      : 0x3c1d49d4  
A10     : 0x3c253550  A11     : 0x00000030  A12     : 0x3fca62d8  A13     : 0x3fca61ac  
A14     : 0x00000263  A15     : 0x3fcbe8c0  SAR     : 0x0000001e  EXCCAUSE: 0x0000001c  
EXCVADDR: 0x81165151  LBEG    : 0x40056f08  LEND    : 0x40056f12  LCOUNT  : 0x00000000  


Backtrace: 0x42081923:0x3fcbe8f0 0x420816fa:0x3fcbe920 0x42029e73:0x3fcbe980 0x420060f5:0x3fcbe9d0 0x420b85bd:0x3fcbea10 0x420b8685:0x3fcbea30 0x40379b56:0x3fcbea50 0x420b1a27:0x3fcbeaf0 0x420b85bd:0x3fcbeb60 0x420b862a:0x3fcbeb80 0x420d9079:0x3fcbebc0 0x420d9206:0x3fcbebf0 0x420b8704:0x3fcbece0 0x40379de3:0x3fcbed20 0x420b1a27:0x3fcbedc0 0x420b85bd:0x3fcbee10 0x420b862a:0x3fcbee30 0x420d9079:0x3fcbee70 0x420d9206:0x3fcbeea0 0x420b8704:0x3fcbef90 0x40379de3:0x3fcbefd0 0x420b1a27:0x3fcbf070 0x420b85bd:0x3fcbf0c0 0x420b85d2:0x3fcbf0e0 0x420c6557:0x3fcbf100 0x420c684c:0x3fcbf190 0x420cdd48:0x3fcbf1d0




ELF file SHA256: 34df4ed8d

Rebooting...
���ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0xc (RTC_SW_CPU_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x40382df6
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3820,len:0x105c
load:0x403c9700,len:0x4
load:0x403c9704,len:0xbd8
load:0x403cc700,len:0x2e30
entry 0x403c989c
Touch Product id: 911
Touch Firmware version: 0x1060
Touch Vendor id: 0x0
Touch resolution: width=800, height=480
LVGL MicroPython 1.23.0 on 2024-10-07; Generic ESP32S3 module with Octal-SPIRAM with ESP32S3
Type "help()" for more information.

this happens when I try to run the code generated by squareline studio.
osui.py.txt
ui_images.py.txt
ui.py.txt

I have no idea what this means but I'll try to tweak this thing until it works.

Type-32 Oct 9, 2024
Author

I moved some parts of the ui.py into osui.py.

import lvgl as lv


# import ui
# import ui_images

dispp = lv.display_get_default()
theme = lv.theme_default_init(dispp, lv.palette_main(lv.PALETTE.BLUE), lv.palette_main(lv.PALETTE.RED), False, lv.font_default())
# dispp.set_theme(theme)

_ui_comp_table = {}
_ui_comp_prev = None
_ui_name_prev = None
_ui_child_prev = None
_ui_comp_table.clear()

def ui_OptionsModal_create(comp_parent):
    cui_OptionsModal = lv.obj(comp_parent)
    cui_OptionsModal.set_width(lv.pct(60))
    cui_OptionsModal.set_height(lv.SIZE_CONTENT)   # 50
    cui_OptionsModal.set_align( lv.ALIGN.CENTER)
    cui_OptionsModal.set_flex_flow(lv.FLEX_FLOW.COLUMN)
    cui_OptionsModal.set_flex_align(lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.START)
    SetFlag(cui_OptionsModal, lv.obj.FLAG.SCROLLABLE, False)
    cui_ModalTitle = lv.label(cui_OptionsModal)
    cui_ModalTitle.set_text("ModalTitle")
    cui_ModalTitle.set_width(lv.pct(100))
    cui_ModalTitle.set_height(lv.SIZE_CONTENT)   # 1
    cui_ModalTitle.set_style_text_color(lv.color_hex(0x4C4C4C), lv.PART.MAIN | lv.STATE.DEFAULT )
    cui_ModalTitle.set_style_text_opa(255, lv.PART.MAIN| lv.STATE.DEFAULT )
    cui_ModalTitle.set_style_text_letter_space( 1, lv.PART.MAIN | lv.STATE.DEFAULT )
    cui_ModalTitle.set_style_text_line_space( 0, lv.PART.MAIN | lv.STATE.DEFAULT )
    # cui_ModalTitle.set_style_text_font( lv.font_montserrat_18, lv.PART.MAIN | lv.STATE.DEFAULT )
    cui_ModalContent = lv.label(cui_OptionsModal)
    cui_ModalContent.set_text("text")
    cui_ModalContent.set_width(lv.pct(100))
    cui_ModalContent.set_height(lv.SIZE_CONTENT)   # 1
    cui_ModalContent.set_align( lv.ALIGN.CENTER)
    cui_Options = lv.obj(cui_OptionsModal)
    cui_Options.remove_style_all()
    cui_Options.set_height(40)
    cui_Options.set_width(lv.pct(100))
    cui_Options.set_align( lv.ALIGN.CENTER)
    cui_Options.set_flex_flow(lv.FLEX_FLOW.ROW)
    cui_Options.set_flex_align(lv.FLEX_ALIGN.SPACE_EVENLY, lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER)
    SetFlag(cui_Options, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(cui_Options, lv.obj.FLAG.SCROLLABLE, False)
    cui_Opt1 = lv.button(cui_Options)
    cui_Opt1.set_height(50)
    cui_Opt1.set_flex_grow(1)
    cui_Opt1.set_align( lv.ALIGN.CENTER)
    SetFlag(cui_Opt1, lv.obj.FLAG.SCROLLABLE, False)
    SetFlag(cui_Opt1, lv.obj.FLAG.SCROLL_ON_FOCUS, True)
    cui_Opt1Text = lv.label(cui_Opt1)
    cui_Opt1Text.set_text("Option1")
    cui_Opt1Text.set_width(lv.SIZE_CONTENT)	# 1
    cui_Opt1Text.set_height(lv.SIZE_CONTENT)   # 1
    cui_Opt1Text.set_align( lv.ALIGN.CENTER)
    cui_Container9 = lv.obj(cui_Options)
    cui_Container9.remove_style_all()
    cui_Container9.set_width(10)
    cui_Container9.set_height(lv.pct(100))
    cui_Container9.set_align( lv.ALIGN.CENTER)
    SetFlag(cui_Container9, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(cui_Container9, lv.obj.FLAG.SCROLLABLE, False)
    cui_Opt2 = lv.button(cui_Options)
    cui_Opt2.set_height(50)
    cui_Opt2.set_flex_grow(1)
    cui_Opt2.set_align( lv.ALIGN.CENTER)
    SetFlag(cui_Opt2, lv.obj.FLAG.SCROLLABLE, False)
    SetFlag(cui_Opt2, lv.obj.FLAG.SCROLL_ON_FOCUS, True)
    cui_Option2Text = lv.label(cui_Opt2)
    cui_Option2Text.set_text("Option2")
    cui_Option2Text.set_width(lv.SIZE_CONTENT)	# 1
    cui_Option2Text.set_height(lv.SIZE_CONTENT)   # 1
    cui_Option2Text.set_align( lv.ALIGN.CENTER)
    _ui_comp_table[id(cui_OptionsModal)]= {"OptionsModal" : cui_OptionsModal,"ModalTitle" : cui_ModalTitle,"ModalContent" : cui_ModalContent,"Options" : cui_Options,"Options_Opt1" : cui_Opt1,"Options_Opt1_Opt1Text" : cui_Opt1Text,"Options_Container9" : cui_Container9,"Options_Opt2" : cui_Opt2,"Options_Opt2_Option2Text" : cui_Option2Text, "_CompName" : "OptionsModal"}
    return cui_OptionsModal

def SetFlag(obj, flag, value: bool):
    if (value):
        obj.add_flag(flag)
    else:
        obj.remove_flag(flag)
    return

def custom():
    ui_Screen1 = lv.obj()
    SetFlag(ui_Screen1, lv.obj.FLAG.SCROLLABLE, False)

    ui_MainContainer = lv.obj(ui_Screen1)
    ui_MainContainer.remove_style_all()
    ui_MainContainer.set_width(lv.pct(100))
    ui_MainContainer.set_height(lv.pct(100))
    ui_MainContainer.set_align(lv.ALIGN.CENTER)
    SetFlag(ui_MainContainer, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_MainContainer, lv.obj.FLAG.SCROLLABLE, False)

    ui_Interface = lv.obj(ui_MainContainer)
    ui_Interface.remove_style_all()
    ui_Interface.set_width(lv.pct(100))
    ui_Interface.set_height(lv.pct(100))
    ui_Interface.set_align(lv.ALIGN.CENTER)
    ui_Interface.set_flex_flow(lv.FLEX_FLOW.COLUMN)
    ui_Interface.set_flex_align(lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER)
    SetFlag(ui_Interface, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_Interface, lv.obj.FLAG.SCROLLABLE, False)

    ui_InfoHeader = lv.obj(ui_Interface)
    ui_InfoHeader.remove_style_all()
    ui_InfoHeader.set_height(20)
    ui_InfoHeader.set_width(lv.pct(100))
    ui_InfoHeader.set_align(lv.ALIGN.TOP_MID)
    ui_InfoHeader.set_flex_flow(lv.FLEX_FLOW.ROW)
    ui_InfoHeader.set_flex_align(lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER)
    SetFlag(ui_InfoHeader, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_InfoHeader, lv.obj.FLAG.SCROLLABLE, False)
    ui_InfoHeader.set_style_bg_color(lv.color_hex(0xCCCCCC), lv.PART.MAIN | lv.STATE.DEFAULT)
    ui_InfoHeader.set_style_bg_opa(255, lv.PART.MAIN | lv.STATE.DEFAULT)

    ui_InfoHeader.set_style_pad_left(4, lv.PART.SCROLLBAR | lv.STATE.DEFAULT)
    ui_InfoHeader.set_style_pad_right(4, lv.PART.SCROLLBAR | lv.STATE.DEFAULT)
    ui_InfoHeader.set_style_pad_top(2, lv.PART.SCROLLBAR | lv.STATE.DEFAULT)
    ui_InfoHeader.set_style_pad_bottom(2, lv.PART.SCROLLBAR | lv.STATE.DEFAULT)

    ui_LeftSection = lv.obj(ui_InfoHeader)
    ui_LeftSection.remove_style_all()
    ui_LeftSection.set_height(lv.pct(100))
    ui_LeftSection.set_flex_grow(1)
    ui_LeftSection.set_align(lv.ALIGN.CENTER)
    ui_LeftSection.set_flex_flow(lv.FLEX_FLOW.ROW)
    ui_LeftSection.set_flex_align(lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.CENTER)
    SetFlag(ui_LeftSection, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_LeftSection, lv.obj.FLAG.SCROLLABLE, False)

    ui_WifiStatus = lv.label(ui_LeftSection)
    ui_WifiStatus.set_text("Wifi: Not Connected")
    ui_WifiStatus.set_width(lv.SIZE_CONTENT)  # 1
    ui_WifiStatus.set_height(lv.SIZE_CONTENT)  # 1
    ui_WifiStatus.set_align(lv.ALIGN.CENTER)

    ui_MiddleSection = lv.obj(ui_InfoHeader)
    ui_MiddleSection.remove_style_all()
    ui_MiddleSection.set_height(lv.pct(100))
    ui_MiddleSection.set_flex_grow(1)
    ui_MiddleSection.set_align(lv.ALIGN.CENTER)
    ui_MiddleSection.set_flex_flow(lv.FLEX_FLOW.ROW)
    ui_MiddleSection.set_flex_align(lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER)
    SetFlag(ui_MiddleSection, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_MiddleSection, lv.obj.FLAG.SCROLLABLE, False)

    ui_Time = lv.label(ui_MiddleSection)
    ui_Time.set_text("10:00")
    ui_Time.set_width(lv.SIZE_CONTENT)  # 1
    ui_Time.set_height(lv.SIZE_CONTENT)  # 1
    ui_Time.set_align(lv.ALIGN.CENTER)

    ui_RightSection = lv.obj(ui_InfoHeader)
    ui_RightSection.remove_style_all()
    ui_RightSection.set_height(lv.pct(100))
    ui_RightSection.set_flex_grow(1)
    ui_RightSection.set_align(lv.ALIGN.CENTER)
    ui_RightSection.set_flex_flow(lv.FLEX_FLOW.ROW)
    ui_RightSection.set_flex_align(lv.FLEX_ALIGN.END, lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.CENTER)
    SetFlag(ui_RightSection, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_RightSection, lv.obj.FLAG.SCROLLABLE, False)

    ui_Battery = lv.label(ui_RightSection)
    ui_Battery.set_text("90% Charge")
    ui_Battery.set_width(lv.SIZE_CONTENT)  # 1
    ui_Battery.set_height(lv.SIZE_CONTENT)  # 1
    ui_Battery.set_align(lv.ALIGN.CENTER)

    ui_AppInterface = lv.obj(ui_Interface)
    ui_AppInterface.remove_style_all()
    ui_AppInterface.set_width(lv.pct(100))
    ui_AppInterface.set_height(lv.pct(95))
    ui_AppInterface.set_align(lv.ALIGN.CENTER)
    SetFlag(ui_AppInterface, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_AppInterface, lv.obj.FLAG.SCROLLABLE, False)

    ui_OverInterface = lv.obj(ui_MainContainer)
    ui_OverInterface.remove_style_all()
    ui_OverInterface.set_width(lv.pct(100))
    ui_OverInterface.set_height(lv.pct(100))
    ui_OverInterface.set_align(lv.ALIGN.CENTER)
    SetFlag(ui_OverInterface, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_OverInterface, lv.obj.FLAG.SCROLLABLE, False)

    ui_MainKeyboard = lv.keyboard(ui_OverInterface)
    ui_MainKeyboard.set_width(lv.pct(100))
    ui_MainKeyboard.set_height(lv.pct(50))
    ui_MainKeyboard.set_align(lv.ALIGN.BOTTOM_MID)

    ui_ModalContainer = lv.obj(ui_OverInterface)
    ui_ModalContainer.remove_style_all()
    ui_ModalContainer.set_width(lv.pct(100))
    ui_ModalContainer.set_height(lv.pct(100))
    ui_ModalContainer.set_align(lv.ALIGN.CENTER)
    SetFlag(ui_ModalContainer, lv.obj.FLAG.CLICKABLE, False)
    SetFlag(ui_ModalContainer, lv.obj.FLAG.SCROLLABLE, False)

    ui_OptionsModal = ui_OptionsModal_create(ui_ModalContainer)
    ui_OptionsModal.set_x(0)
    ui_OptionsModal.set_y(0)

    lv.screen_load(ui_Screen1)


def main():
    pass

I ran it and I may have found the issue:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "osui.py", line 88, in custom
MemoryError: memory allocation failed, allocating 2147483656 bytes

For the last error I was mentioning, I think it's because of the task handler part in the main.py since it's running constantly and introducing another concurrent thread will probably make it panic (I am not familiar with the terminology but I have a general idea on what's going on and what might've caused the last issue.)

Type-32 · 2024-10-09T03:49:11Z

Type-32
Oct 9, 2024
Author

Another annoying issue that has an annoying workaround:

"/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA/.venv/bin/python" "/Users/administrator/Library/Application Support/JetBrains/PyCharm2024.2/plugins/intellij-micropython/scripts/microupload.py" -C "/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA" -v /dev/cu.usbmodem58A60707701 "/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA/osui.py"
Connecting to /dev/cu.usbmodem58A60707701
Uploading files: 0% (0/1)
/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA/osui.py -> osui.py
Traceback (most recent call last):
  File "/Users/administrator/Library/Application Support/JetBrains/PyCharm2024.2/plugins/intellij-micropython/scripts/microupload.py", line 139, in <module>
    main(sys.argv[1:])
  File "/Users/administrator/Library/Application Support/JetBrains/PyCharm2024.2/plugins/intellij-micropython/scripts/microupload.py", line 79, in main
    files.put(remote_path, fd.read())
  File "/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA/.venv/lib/python3.12/site-packages/ampy/files.py", line 218, in put
    self._pyboard.exec_("f.write({0})".format(chunk))
  File "/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA/.venv/lib/python3.12/site-packages/ampy/pyboard.py", line 265, in exec_
    ret, ret_err = self.exec_raw(command)
                   ^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA/.venv/lib/python3.12/site-packages/ampy/pyboard.py", line 256, in exec_raw
    self.exec_raw_no_follow(command);
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/administrator/Documents/PyCharm Projects/GeneralPurposePDA/.venv/lib/python3.12/site-packages/ampy/pyboard.py", line 253, in exec_raw_no_follow
    raise PyboardError('could not exec command')
ampy.pyboard.PyboardError: could not exec command

Keep getting this when trying to flash my own program. Erasing the flash and reflashing the firmware does the job but I have to reflash the programs in again but only to be greeted with this after the first or second time of flashing my program on to the hardware.

16 replies

kdschlosser Oct 9, 2024
Maintainer

what I do to handle the positioning of things is I use Paint.NET (Windows) and create a new image the same size as the display. I create a layer for each widget/object that I would make for the GUI and I set a dotted outline to that layer to indicate the outside edges of the widget. then I position it where I want it to appear.. I hover the mouse over the top left corner to get the position. That's if I am creating a statically positioned and sized GUI. If the GUI is going to be designed so it is able to run on any size display then I create 2 displays one for the smallest size supported and one for the largest size supported and I remap the sizes and positions using the display width and height as inputs and the small display as the min input and the large display as the max input.

Type-32 Oct 9, 2024
Author

You can pick through the generated code and make the corrections that are needed. But the code ran directly is not going to run right if it even runs at all...

That is one issue I'm facing. By far the code does run, but I have to like plug in to the USB port first, wait a few seconds until the UI comes out, then switch to UART port to flash my code changes. Sometimes it just spouts out errors which I don't know how and why even though the only change is just adding a non-code comment.

The stability in the code it generates is worrying; though, I am looking for other alternative workflows for this. Right now I'm sticking with this workflow to at least get something out and then consider about stability later in development.

Type-32 Oct 9, 2024
Author

what I do to handle the positioning of things is I use Paint.NET (Windows) and create a new image the same size as the display. I create a layer for each widget/object that I would make for the GUI and I set a dotted outline to that layer to indicate the outside edges of the widget. then I position it where I want it to appear.. I hover the mouse over the top left corner to get the position. That's if I am creating a statically positioned and sized GUI. If the GUI is going to be designed so it is able to run on any size display then I create 2 displays one for the smallest size supported and one for the largest size supported and I remap the sizes and positions using the display width and height as inputs and the small display as the min input and the large display as the max input.

That is a very creative approach which I'll try later. Massive thanks for sharing it. :D

It's more or so on how to implement design in code, which I lack knowledge of. Until the documentation for this comes out I'm going to stick with Squareline for now.

kdschlosser Oct 9, 2024
Maintainer

I added a function that does the remapping to the binding.

import lcd_utils

out_value = lcd_utils.remap(in_value, in_min, in_max, out_min, out_max)

it works like this...

from lcd_utils import remap


ORIGINAL_DISPLAY_WIDTH = 800
ORIGINAL_DISPLAY_HEIGHT = 480

DISPLAY_WIDTH = 320
DISPLAY_HEIGHT = 240


class DisplayScaling:

    def __init__(self, x, y, width, height, keep_aspect=True):

        self._x = x
        self._y = y
        self._width = width
        self._height = height
        self._keep_aspect = keep_aspect
        self._aspect = float(width) / float(height)

    @property
    def x(self):
        return remap(self._x, 0, ORIGINAL_DISPLAY_WIDTH, 0, DISPLAY_WIDTH)

    @property
    def y(self):
        y = remap(self._x, 0, ORIGINAL_DISPLAY_HEIGHT, 0, DISPLAY_HEIGHT)

        height_scalar = remap(self._height,0.0, ORIGINAL_DISPLAY_HEIGHT,0.0,1.0)

        offset = height_scalar * DISPLAY_HEIGHT
        
        y -= int(offset)

        if self._keep_aspect:
            y -= int((height_scalar * (self.height - self._height)) / 2)

        return int(y)

    @property
    def width(self):
        return remap(self._width, 0, ORIGINAL_DISPLAY_WIDTH, 0, DISPLAY_WIDTH)

    @property
    def height(self):
        if self._keep_aspect:
            return int(self.width / self._aspect)

        return remap(self._height, 0, ORIGINAL_DISPLAY_HEIGHT, 0, DISPLAY_HEIGHT)

    @property
    def pos(self):
        return self.x, self.y

    @property
    def size(self):
        return self.width, self.height


ds = DisplayScaling(299, 179, 200, 120, True)

print(ds.size)
print(ds.pos)

Type-32 Oct 9, 2024
Author

what does remapping the binding do?

Type-32 · 2024-10-09T08:36:16Z

Type-32
Oct 9, 2024
Author

One question: in what way is the main.py ran on the device (like runs when booting or loops after booting)? Is it running as a loop or something, or is it only just running one time? I've been trying to setup a realtime local time display but haven't succeeded yet.

1 reply

Type-32 Oct 9, 2024
Author

Solved. I'll post my repository here later for reference.

Type-32 · 2024-10-09T12:53:26Z

Type-32
Oct 9, 2024
Author

I noticed something funny: with the rgb565_byte_swap property set to True, the color black and the ragged edges of white text becomes green for some reason, and red becomes black. with that property set to False, red turns blue, and blue turns red, but the texts and other colors remain normal.

~~Is there a way to fix this?~~
See next comment for fix.

4 replies

Type-32 Oct 9, 2024
Author

Another weird phenomenon: sometimes when I flash the UI code (this also happens with non-squareline-generated-code for some reason), all black text would become white. I'm using the UART port when flashing the code on to the device. If I unplug and leave it for five or so minutes, and power it on with the USB port, then the UI and text and other coloring (red and blue are still swapped) of UI elements becomes normal for some reason. Then I unplug and immediately switch back to UART, then everything stays normal until the next time I flash something in.

Related to:

theme = lv.theme_default_init(dispp, lv.palette_main(lv.PALETTE.BLUE), lv.palette_main(lv.PALETTE.RED), False, lv.font_default())

When False, black texts remain normal; when True, black texts becomes white. I'm guessing this is the option to toggle its dark and white mode.

kdschlosser Oct 9, 2024
Maintainer

what is the bus on the display you are using?

Type-32 Oct 10, 2024
Author

The RGBBus (or I2C Bus).

import time
from micropython import const  # NOQA
from i2c import I2C
import gt911
import lcd_bus
import task_handler
import lvgl as lv  # NOQA
import rgb_display

# SETUP block
_WIDTH = const(800)
_HEIGHT = const(480)

_BUFFER_SIZE = const(768000)

_CTP_SCL = const(9)
_CTP_SDA = const(8)
_CTP_IRQ = const(4)

_SD_MOSI = const(11)
_SD_SCK = const(12)
_SD_MISO = const(13)

_LCD_FREQ = const(13000000)
_PCLK_ACTIVE_NEG = const(0)

_HSYNC_PULSE_WIDTH = const(10)
_HSYNC_BACK_PORCH = const(10)
_HSYNC_FRONT_PORCH = const(10)

_VSYNC_PULSE_WIDTH = const(10)
_VSYNC_BACK_PORCH = const(10)
_VSYNC_FRONT_PORCH = const(20)

_PCLK = const(7)
_HSYNC = const(46)
_VSYNC = const(3)
_DE = const(5)
_DISP = None
_BCKL = None
_DRST = None

I2C_BUS = I2C.Bus(
    host=1,
    scl=_CTP_SCL,
    sda=_CTP_SDA,
    freq=400000,
    use_locks=False
)

TOUCH_DEVICE = I2C.Device(
    I2C_BUS,
    dev_id=gt911.I2C_ADDR,
    reg_bits=gt911.BITS
)

_DATA15 = const(10)  # B7
_DATA14 = const(17)  # B6
_DATA13 = const(18)  # B5
_DATA12 = const(38)  # B4
_DATA11 = const(14)  # B3
_DATA10 = const(21)  # G7
_DATA9 = const(47)  # G6
_DATA8 = const(48)  # G5
_DATA7 = const(45)  # G4
_DATA6 = const(0)  # G3
_DATA5 = const(39)  # G2
_DATA4 = const(40)  # R7
_DATA3 = const(41)  # R6
_DATA2 = const(42)  # R5
_DATA1 = const(2)  # R4
_DATA0 = const(1)  # R3

bus = lcd_bus.RGBBus(
    hsync=_HSYNC,
    vsync=_VSYNC,
    de=_DE,
    pclk=_PCLK,
    data0=_DATA0,
    data1=_DATA1,
    data2=_DATA2,
    data3=_DATA3,
    data4=_DATA4,
    data5=_DATA5,
    data6=_DATA6,
    data7=_DATA7,
    data8=_DATA8,
    data9=_DATA9,
    data10=_DATA10,
    data11=_DATA11,
    data12=_DATA12,
    data13=_DATA13,
    data14=_DATA14,
    data15=_DATA15,
    freq=_LCD_FREQ,
    hsync_front_porch=_HSYNC_FRONT_PORCH,
    hsync_back_porch=_HSYNC_BACK_PORCH,
    hsync_pulse_width=_HSYNC_PULSE_WIDTH,
    hsync_idle_low=False,
    vsync_front_porch=_VSYNC_FRONT_PORCH,
    vsync_back_porch=_VSYNC_BACK_PORCH,
    vsync_pulse_width=_VSYNC_PULSE_WIDTH,
    vsync_idle_low=False,
    de_idle_high=False,
    pclk_idle_high=False,
    pclk_active_low=_PCLK_ACTIVE_NEG,
)

Type-32 Oct 10, 2024
Author

Here is my repo: https://github.com/Type-32/GeneralPurposePDA

kdschlosser · 2024-10-10T02:20:04Z

kdschlosser
Oct 10, 2024
Maintainer

OK so when dealing with the RGBBus and using RGB565 with a 16 lane connection if your colors are off it is going to be because the pins are not defined correctly.

I have seen this more than once where for some crazy reason the pin order is goofed up.

so what you are going to need to do is double check the pins to see if they align with what the data sheet says. You will have to compare that with what is in the examples for the display as well. I have found that the datasheet is not always correct but the examples are and the examples also will give you a hint as to what pin actually does what.

5 replies

Type-32 Oct 10, 2024
Author

Thank you so much for this suggestion. I swapped the pin assignments around a bit and now it's correctly displaying the right colors.

My pin config is below

_DATA15 = const(40)  # R7
_DATA14 = const(41)  # R6
_DATA13 = const(42)  # R5
_DATA12 = const(2)   # R4
_DATA11 = const(1)   # R3
_DATA10 = const(21)  # G7
_DATA9 = const(47)   # G6
_DATA8 = const(48)   # G5
_DATA7 = const(45)   # G4
_DATA6 = const(0)    # G3
_DATA5 = const(39)   # G2
_DATA4 = const(10)   # B7
_DATA3 = const(17)   # B6
_DATA2 = const(18)   # B5
_DATA1 = const(38)   # B4
_DATA0 = const(14)   # B3

kdschlosser Oct 10, 2024
Maintainer

sometimes it's like that. It's how RGB displays work. Since there are no commands that gets sent over those pins what does get sent is the RGB bit data. and in the case of RGB565 it is 16 bits which is one bit position for each lane. change them around and you change the color that gets displayed.

kdschlosser Oct 10, 2024
Maintainer

Your display has a pixel color order of BGR

Type-32 Oct 10, 2024
Author

is this pixel color order random of the produced product or configured by default on every product? (is it intentional or unintentional)

kdschlosser Oct 10, 2024
Maintainer

it could be caused by any number of things. I have yet to test it to see if mine has changed. it could be an issue in my code.. when I get some time I will test it out.

Type-32 · 2024-10-15T05:03:51Z

Type-32
Oct 15, 2024
Author

An update on the SD Card Slot thingy: i recently bought an MMC Micro card to see whether it'll work on the board and it does not fit lol. I now bought another micro SD card and am waiting for it to arrive.

0 replies

Type-32 · 2024-10-19T07:28:46Z

Type-32
Oct 19, 2024
Author

Update on the SD Card thingy: I rechecked the wiki again and it says that:

SD Cards require SPI Communication; Note that SD_CS will have to be driven by EXIO4 from CH422G

...whatever the hell that means.

10 replies

kdschlosser Oct 19, 2024
Maintainer

I was just being a smart ass is all. I figured you would be happy that I already had written a driver framework handle IO expanders and i it just so happened that I had written a driver for the IO expander you were using.

danielcqar Mar 13, 2025

Hi, I'm developing an application running in a ESP32-S3-Touch-LCD-7 from Waveshare.

The application uses lvgl_micropython for a multiscreen UI and asyncio to run the access to DS3231 rtc vía I2C and polling an external device with ELAM protocol (kind a Modbus).
Thanks to several tips from @kdschlosser I found in this and another pages I got working the whole thing in a very short time.

You really are a nice guy... but (always there is a but), to finally add card support I tried io_expander.py but it didn't work for me, when I import it I get an "AttributeError: 'module' object has no attribute 'EXIO1'" error.
By the way, I'm using "LVGL (9.2.2) MicroPython (1.24.1) Binding compiled on 2025-03-10; Generic ESP32S3 module with Octal-SPIRAM with ESP32S3" (make.py esp32 BOARD=ESP32_GENERIC_S3 BOARD_VARIANT=SPIRAM_OCT DISPLAY=rgb_display INDEV=gt911 --enable-uart-repl=n --enable-cdc-repl=y --enable-jtag-repl=n).

I will appreciate very much any tip to solve this.

kdschlosser Mar 14, 2025
Maintainer

well I'll be damned. Not sure why I do not have those define in the framework.

Use this attached one instead and see if that works for ya.
io_expander.py.txt

I do not have one of these expanders so this driver is untested. There are probably things that are going to need to be altered to get it to work.

If you have any other issues with it, please open an issue and we can go over what is wrong there.

danielcqar Mar 14, 2025

Me again, only to say that the new io_expander.py solved the problem.
By the way, after reading again and again machine_hw_spi.c and machine_sdcard.c on micropy_updates/esp32 finally understand the right steps to put the sd slot to work.
Thank you very much for the io_expander.py in particular and for make the lvgl+micropython build much easier.

kdschlosser Mar 15, 2025
Maintainer

I added a revised version of the driver to the repo so you can bake it into the firmware if you wanted to. Add the IO_EXPANDER= IC model number build command and that will compile the driver into the firmware for ya.

gmeader · 2025-01-24T06:28:04Z

gmeader
Jan 24, 2025

I successfully built a .bin for the ESP32-S3-Touch-LCD-4.3 from WaveShare on both MacOS and Linux. There's lots of helpful info from kdschlosser in the Closed Issues for this repo regarding getting a build to actually work on MacOS and Linux - there are lots of things that might not work at first. I built a native binary for MacOS then Linux , then for the WaveShare board.

Here's the build command for the WaveShare board:
python3 make.py esp32 BOARD=ESP32_GENERIC_S3 BOARD_VARIANT=SPIRAM_OCT --flash-size=8 DISPLAY=rgb_display INDEV=gt911 CONFIG_FREERTOS_HZ=1000 CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240=y CONFIG_ESPTOOLPY_FLASHMODE_QIO=y CONFIG_ESPTOOLPY_FLASHFREQ_120M=y CONFIG_IDF_EXPERIMENTAL_FEATURES=y CONFIG_SPIRAM_SPEED_120M=y CONFIG_SPIRAM_FETCH_INSTRUCTIONS=y CONFIG_SPIRAM_RODATA=y CONFIG_ESP32S3_DATA_CACHE_LINE_64B=y CONFIG_COMPILER_OPTIMIZATION_PERF=y

At the end of the build, it displays the command to flash the .bin onto the WaveShare board. You have to figure out the name of the USB serial port that appears on your computer when you plug the Waveshare board in using a USB cable. Replace "(PORT)" with that devicename. On my Linux box the device is /dev/ttyACM0
Once you got it flashed, you can fire up a serial terminal on that port and you will see the LVGL Micropython REPL. The USB cable connects to the USB-C port on the board labelled UART.

I installed mpremote on my Linux box so I could manipulate (copy from PC to board, etc.) Python files on the WaveShare board.
if Micropython is running on the board, then mpremote can connect to it.

I got some demo LVGL python demo code running on the board. The touchscreen works too.
Rename this to demo.py:
demo.py.txt

Copy the demo.py file to the board using mpremote fs cp demo.py :demo.py, then give just a mpremote command with no optionsand you'll get a REPL.

Type import demo in the REPL to run it and see the display on the board working.

2 replies

kdschlosser Jan 24, 2025
Maintainer

as a side note. If you want to give the file transfer a good swift kick in the arse you can optionally add
--uart-repl-bitrate={bitrate} to the build command. Replace the {bitrate} with the speed you want to use. The maximum is going to depend on the UART to USB bridge chip that is used on the board. I have had pretty decent luck with '921600'. I have not seen a bridge IC that had an issue with 460800. so that is a large jump up in speed at 4x the speed.

Now remember this setting alters the connection speed of the UART that handle the REPL. so you will need to adjust your terminal program accordingly. mpremote will also need to have it's default speed changed as well.

This is a really handy thing especially when transferring a lot of source files and images. When you start writing really complex UI's you are not going to want to code it all in a single source file. It becomes unmanageable. When uploading a lot of files the speed helps a lot.

kdschlosser Jan 24, 2025
Maintainer

I did also want to note that macOS and Linux can be a little bit of a pain because of the very large differences in the OS with respect to the environment. It's not always cut and dry which is why it is very important to ask for some assistance. Don't pull your hair out over it. It could be something that has been seen before and is really simple to fix.

I can confirm that the build works on both Apple Silicon and Intel Silicon when running macOS. I am happy that it's all hammered out. I think I am going to add some code to the macOS build to locate FFI and SDL2 and to automatically handle setting the library and include paths. I am going to have to check and see what kind of an API is available for Homebrew to see if I am able to get the information that is needed form it without needing to do it using a subprocess and parsing output.

gmeader · 2025-01-27T22:06:56Z

gmeader
Jan 27, 2025

Here is the pal.py display with rgb565_byte_swap=False

Here is the pal.py display with rgb565_byte_swap=True

Neither is correct. I'm looking at the hex color values trying to see if there is some way to figure out what might be mis-arranged.
So far I'm not seeing the pattern.

1 reply

kdschlosser Jan 27, 2025
Maintainer

How about this. 3 colors only and make them FF0000, 00FF00 and 0000FF It is going to be a whole lot easier to figure out what is going on if you have only those colors.

gmeader · 2025-01-27T23:34:34Z

gmeader
Jan 27, 2025

Here's those 3 buttons and more.
Notice how something odd happens in the change from 7F to 80 in the middle byte (maybe the blue?)

This is with rgb565_byte_swap=FALSE
it is generated with code like this:

color_values=[0,127,128,255]
for r in color_values:
    for b in color_values
         for g in color_values:
            color = lv.color_make(r,g,b)
            hex = '{:02X}{:02X}{:02X}'.format(r,g,b)
            button.append(lv.button(button_container))
            button[-1].set_style_bg_color(color,0)
            button_label.set_text(hex)

3 replies

kdschlosser Jan 27, 2025
Maintainer

all I want is 3 colors. FF0000 00FF00 and 0000FF

gmeader Jan 27, 2025

row 4, column 1 = 00FF00 full blue
row 5, column 2 = 0000FF full red
row 1, column 7 = FF0000 full green

any color with only FF or 00 seems correct.

kdschlosser Jan 27, 2025
Maintainer

I think I figured out the pins. Give this a try...

_DATA15 = const(40) # R7
_DATA14 = const(41) # R6
_DATA13 = const(42) # R5
_DATA12 = const(2) # R4
_DATA11 = const(1) # R3

_DATA10 = const(21) # G7
_DATA9 = const(47) # G6
_DATA8 = const(48) # G5
_DATA7 = const(45) # G4
_DATA6 = const(0) # G3
_DATA5 = const(39) # G2

_DATA4 = const(10) # B7
_DATA3 = const(17) # B6
_DATA2 = const(18) # B5
_DATA1 = const(38) # B4
_DATA0 = const(14) # B3

gmeader · 2025-01-28T00:27:14Z

gmeader
Jan 28, 2025

SUCCESS! Replaced the code in pal.py.txt with your new pin definitions and Voila!

1 reply

kdschlosser Jan 28, 2025
Maintainer

You just had to give me a little bit of time to look at the binary for the colors to figure out what was going on.

gmeader · 2025-03-20T19:34:11Z

gmeader
Mar 20, 2025

When I try to connect to a WiFi network using the commands that are displayed when I run help() in the REPL, Micropython crashes on an illegal instruction and does a crash dump. The specific Python statement that crashes it is sta_if.connect()
This is after a succesful sta_if.scan() that shows a bunch of access points.
I'm wondering if this happens for you, or if you want the crash dump file, or have another suggestion.

4 replies

kdschlosser Mar 20, 2025
Maintainer

The WiFi has always been fickle with MicroPython and it needs to be done in a very specific way otherwise you end up with a crash that doesn't provide any useful help.

Have you tried the connection code that is in the MicroPython documentation???

import network

def do_connect():
    wlan = network.WLAN(network.WLAN.IF_STA)
    wlan.active(True)
    if not wlan.isconnected():
        print('connecting to network...')
        wlan.connect('ssid', 'key')
        while not wlan.isconnected():
            pass
    print('network config:', wlan.ipconfig('addr4'))

https://docs.micropython.org/en/latest/esp32/quickref.html#wlan

kdschlosser Mar 20, 2025
Maintainer

One of the things that you need to do is activate the wlan and then you need to check and see if it is connected. The connection is persistent between reboots/crashes when the power is not cut from the ESP32 which is why it is important to check to see if it is connected before attempting to connect.

gmeader Mar 22, 2025

Thanks. The code you posted works sometimes or crashes immediately.
I created a file called net.py with the code you posted, with my local SSID and password. I added do_connect() at the bottom of the file to execute the function.
I power-cycle the board, do mpremote to get the REPL and then do import net.
Sometimes I get the ipconfig result showing the IP address. Then after a few seconds it crashes and shows the dump.
It always crashes, sometimes before it displays the IP address, sometimes after (presumably having connected OK)
I'm wondering if you or others get the same result?

kdschlosser Mar 22, 2025
Maintainer

I have not personally tested it. If you can decode the backtrace in the crash dump that would help me out to locate where the exact problem is happening.

getznerh · 2025-04-09T16:27:33Z

getznerh
Apr 9, 2025

Hi all together! Thanx kdschlosser for the big work on lvgl. But: I use the 7" Waveshare ESP32-S3 Display with gt911 with the CH422G expander. Has anybody solved to get touch to work with lvgl_micropython? Could someone show me the code-sample for that? Thanx in advance and regards Hans

6 replies

getznerh Apr 9, 2025

Thank you for the fast response. I will try it tomorrow. But i think, CH433G should be CH422G?
regards Hans

kdschlosser Apr 10, 2025
Maintainer

Yes you are correct.

getznerh Apr 10, 2025

But there are other problems:
With the buildscript with IO_EXPANDER=ch422g i have no ch422g to import. But i found it in the source and included it manually.
Then, the EXT01 to EXT08 are not defined and i chanched it als told to 0x01 to 0x08.
And then i get the error: File "ch422g.py", line 45, in set_device
AttributeError: 'bound_method' object has no attribute 'func' when calling: # Now we need to set the I2C device to the io expander driver
ch422g.Pin.set_device(io_device)
Is something missing in the sample?

kdschlosser Apr 10, 2025
Maintainer

I made some changes recently to the IO expander framework and I had not tested inside of MicroPython. I do know that MicroPython is not an identical representation of CPython and there are some things that are not exposed. It would appear that this is one of those things. when working with Python you can manipulate it's behavior if you know how the mechanics of it works behind the scenes. That is what I was doing with the set_device method which is actually a classmethod

classmethods get set by using the @classmethod decorator which is simply a function that gets called and the method gets passed to that function and then something else gets returned.

So the definition of the set_device method for the ch422g driver is this..

@classmethod
    def set_device(cls, device):
        io_expander_framework.Pin.set_device.__func__(cls, device)

        cls._reg_in = i2c.I2C.Device(
            bus=device._bus,  # NOQA
            dev_id=_CH422G_REG_IN
        )
        cls._reg_out = i2c.I2C.Device(
            bus=device._bus,  # NOQA
            dev_id=_CH422G_REG_OUT
        )

That same function also exists in the framework for all io expanders and this is the code for that method.

    @classmethod
    def set_device(cls, device):
        if cls._device is not None:
            raise ValueError('device has already been set')

        cls._device = device

Now to eliminate having duplicate code I wanted to be able to call the set_device method in the framework from the set_device method in the ch422g driver. In order to do that I needed to be able to access the original method and not the class method. so to do that this code is used.

        io_expander_framework.Pin.set_device.__func__(cls, device)

THE __func__ you see gets set as the original function that was passed to the @classmethod decorator. This is not exposed in MicroPython. Not that it would be horribly hard to expose it and it would only increase the firmware size by maybe 20 bytes or so but if that was done for every single behind the scenes part of CPython it would increase the firmware size by a very large amount. Some of the back end mechanics have been exposed so it's hit or miss and the only way to know is to either try it or to read the C code to see if it has been exposed.

It would appear that I am being forced to have duplicate code. Not a biggie

getznerh Apr 14, 2025

Many thanks to Kevin! I have now completetd some samples with different ESP32S3 boards with displays. The samples are all built with the lvgl_micropython framework from Kevin. All Samples work with touch and with the sd card.
The ui.py GUI is originally built with the SquareLieStudio. All pictures are loaded from SD card or from a sd subdir on the esp32

I have put all together under https://github.com/getznerh/lvgl_samples and hope i can help other programmers.
Same ESP32S3 Samples

cotesmanoc-byte · 2025-09-25T14:19:21Z

cotesmanoc-byte
Sep 25, 2025

Hi!
When I compile I get this error on the waveshare ESP32-S3:

E (728) rmt(legacy): CONFLICT! driver_ng is not allowed to be us A fatal error occurred. The crash dump printed below may be used to help determine what caused it. If you are not already running the most recent version of MicroPython, consider upgrading. New versions often fix bugs. To learn more about how to debug and/or report this crash visit the wiki page at: https://github.com/micropython/micropython/wiki/ESP32-debugging LVGL MicroPython IDF version : v5.4 Machine : Generic ESP32S3 module with Octal-SPIRAM with ESP32S3 abort() was called at PC 0x4216e3e4 on core 0 Backtrace: 0x403756c5:0x3fceb1f0 0x403884e1:0x3fceb210 0x4038e6ba:0x3fceb230 0x4216e3e4:0x3fceb2a0 0x420bf0de:0x3fceb2c0 0x40375b25:0x3fceb2f0 0x403ccb3d:0x3fceb340 0x403ccef9:0x3fceb380 0x403c8919:0x3fceb4b0 0x40045c01:0x3fceb570 0x40043ab6:0x3fceb6f0 0x40034c45:0x3fceb710

Could this be due to the IDF version? How can I fix it?

0 replies

asherevan · 2025-09-25T16:22:21Z

asherevan
Sep 25, 2025

Hello! This is a known issue and I think it is being worked on. I believe you just have to clone an earlier version of this repository until it is fixed.

0 replies

kwinter745321 · 2025-09-25T16:48:38Z

kwinter745321
Sep 25, 2025

You need to use an earlier verson of idf. Try 5.2.2

…

On Thu, Sep 25, 2025, 12:22 Nathanael Asher ***@***.***> wrote: Hello! This is a known issue and I think it is being worked on. I believe you just have to clone an earlier version of this repository until it is fixed. — Reply to this email directly, view it on GitHub <#142 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGF5YL6KWW32F4AZR3BYSAT3UQJFHAVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJRGM2DAMA> . You are receiving this because you commented.Message ID: <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14513400@ github.com>

1 reply

cotesmanoc-byte Sep 25, 2025

HI! How do I force IDF version 5.2? Thanks!

kwinter745321 · 2025-09-26T13:52:21Z

kwinter745321
Sep 26, 2025

Hello cd to the directory. then git checkout v5.2.2 i hope that helps.

…

On Thu, Sep 25, 2025 at 1:50 PM cotesmanoc-byte ***@***.***> wrote: HI! How do I force IDF version 5.2? Thanks! — Reply to this email directly, view it on GitHub <#142 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGF5YL3ZCDIODJGWLJBPHAD3UQTPTAVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJRGQYTMMI> . You are receiving this because you commented.Message ID: <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14514161@ github.com>

3 replies

cotesmanoc-byte Sep 27, 2025

Thank you!!! Unfortunately, when I change to version 5.2, many errors appear when compiling.

kdschlosser Sep 27, 2025
Maintainer

you cannot change to 5.2...

cotesmanoc-byte Sep 27, 2025

Thank you! What would be the best option?

kwinter745321 · 2025-09-27T23:34:39Z

kwinter745321
Sep 27, 2025

Cotesmanoc-byte Please view Video35 (YouTube) (Applying Microcontroller Solutions) where I first use Kevin Schlosser's approach to build. Later, I build it again and then use it for Video 43 for the Waveshare device. I believe that I use Espressif/idf 5.2 or 5.2.2 k

…

On Sat, Sep 27, 2025, 14:27 cotesmanoc-byte ***@***.***> wrote: Thank you! What would be the best option? — Reply to this email directly, view it on GitHub <#142 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGF5YLZXQQP5RIP2ULC2JBT3U3JILAVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJTGA2TOMY> . You are receiving this because you commented.Message ID: <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14530573@ github.com>

2 replies

kdschlosser Sep 28, 2025
Maintainer

Thanks for the plug in the video. Good pronunciation of my last name too.

If you flashed the firmware from a shell you can greatly speed up how fast the firmware loads onto the ESP32. The speed that Thonny uses is 115200 but speeds of 576000 or faster can be used without any problems.

Are you actually using a separate Windows PC or are you using WSL? If it is the latter there is a nifty little tool that I use that handles forwarding USB ports to WSL. This allows access to be able to flash the ESP32 from WSL. You can download the program from here

Another option is Virtual Here which is a USB/IP driver.

cotesmanoc-byte Oct 1, 2025

Hi @kwinter745321
Thank you so much for your help! I downloaded the firmware, uploaded it to the Waveshare, and it didn’t throw any errors.
The problem is that I can’t load the fonts from the filesystem! Do they only work if they’re on the SD card?
I tried several different ways but had no success!

kwinter745321 · 2025-09-29T02:15:57Z

kwinter745321
Sep 29, 2025

Kevin Thanks for the advice. I will try them. K

…

On Sun, Sep 28, 2025, 00:50 Kevin Schlosser ***@***.***> wrote: Thanks for the plug in the video. Good pronunciation of my last name too. If you flashed the firmware from a shell you can greatly speed up how fast the firmware loads onto the ESP32. The speed that Thonny uses is 115200 but speeds of 576000 or faster can be used without any problems. Are you actually using a separate Windows PC or are you using WSL? If it is the latter there is a nifty little tool that I use that handles forwarding ESP ports to WSL. This allows access to be able to flash the ESP32 from WSL. You can download the program from here <https://gitlab.com/alelec/wsl-usb-gui/-/releases> Another option is Virtual Here <https://www.virtualhere.com/> which is a USB/IP driver. — Reply to this email directly, view it on GitHub <#142 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGF5YL2MN4YBXMPLSFKCJUD3U5SKFAVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJTGIZDINI> . You are receiving this because you commented.Message ID: <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14532245@ github.com>

2 replies

kdschlosser Sep 29, 2025
Maintainer

I corrected a typo in my last post. I meant to say that the program handles forwarding "USB" ports not "ESP" ports

kdschlosser Sep 29, 2025
Maintainer

I know with your example projects you have on github you can make it a bit easier for a person using them if you write a script that will pull the python source files you made and it will bake them into the firmware. This will trim down the amount of things a user needs to do to test out your examples.

Optionally you can also supply a toml file that describes what drivers to use and what GPIO's to use for the drivers. a python module gets made that is baked into the firmware so all that needs to be done is import that module from a python script that gets run on the MCU and it will get the display and touch all set up for ya.

kwinter745321 · 2025-09-30T15:31:12Z

kwinter745321
Sep 30, 2025

which build approach are you attempting? can you reply back with the command ? k

…

On Thu, Sep 25, 2025 at 10:19 AM cotesmanoc-byte ***@***.***> wrote: Hi! When I compile I get this error on the waveshare ESP32-S3: E (728) rmt(legacy): CONFLICT! driver_ng is not allowed to be us A fatal error occurred. The crash dump printed below may be used to help determine what caused it. If you are not already running the most recent version of MicroPython, consider upgrading. New versions often fix bugs. To learn more about how to debug and/or report this crash visit the wiki page at: https://github.com/micropython/micropython/wiki/ESP32-debugging LVGL MicroPython IDF version : v5.4 Machine : Generic ESP32S3 module with Octal-SPIRAM with ESP32S3 abort() was called at PC 0x4216e3e4 on core 0 Backtrace: 0x403756c5:0x3fceb1f0 0x403884e1:0x3fceb210 0x4038e6ba:0x3fceb230 0x4216e3e4:0x3fceb2a0 0x420bf0de:0x3fceb2c0 0x40375b25:0x3fceb2f0 0x403ccb3d:0x3fceb340 0x403ccef9:0x3fceb380 0x403c8919:0x3fceb4b0 0x40045c01:0x3fceb570 0x40043ab6:0x3fceb6f0 0x40034c45:0x3fceb710 Could this be due to the IDF version? How can I fix it? — Reply to this email directly, view it on GitHub <#142 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGF5YLY23LV3QYDKFF2DJ733UP2X7AVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJRGIYDANY> . You are receiving this because you commented.Message ID: <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14512007@ github.com>

0 replies

kwinter745321 · 2025-10-01T14:23:45Z

kwinter745321
Oct 1, 2025

Hello, There are two example programs. test_matrix2_lcdbus.py (only uses local fonts). The test_button2_lcdbus.py deliberately is using fonts on the sd card. You can drag a copy of the font folder from the GitHub site. I am glad you got the MicroPython installed. let me know if you got it working with either demo program. k

…

On Tue, Sep 30, 2025 at 8:34 PM cotesmanoc-byte ***@***.***> wrote: Hi @kwinter745321 <https://github.com/kwinter745321> Thank you so much for your help! I downloaded the firmware, uploaded it to the Waveshare, and it didn’t throw any errors. The problem is that I can’t load the fonts from the filesystem! Do they only work if they’re on the SD card? I tried several different ways but had no success! — Reply to this email directly, view it on GitHub <#142 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGF5YL6QVZCXYEU4F5M3KC33VMOSZAVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJVG43TSMA> . You are receiving this because you were mentioned.Message ID: <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14557790@ github.com>

2 replies

cotesmanoc-byte Oct 2, 2025

HI!
I tried with the 2 test files from the repo and they didn’t work.
It seems that the screen stops working when I insert the SD.
I also tried loading the fonts from the SD with another test script and that didn’t work either.

For this example the console showed:

import test_button2_lcdbus
RGBBus
display <RGBDisplay object at 3c254d60>
Touch Product id: 911
Touch Firmware version: 0x1060
Touch Vendor id: 0x0
Touch resolution: width=800, height=480
Touch Product id: 911
Touch Firmware version: 0x1060
Touch Vendor id: 0x0
Touch resolution: width=800, height=480
SDCard error: name 'vfs' isn't defined
UI
Traceback (most recent call last):
File "", line 1, in
File "test_button2_lcdbus.py", line 45, in
File "fs_driver.py", line 24, in _fs_open_cb
RuntimeError: fs_open_callback(font/montserrat-med-18-2.bin) exception: [Errno 2] ENOENT

In the code I replaced vfs with os and it completed without errors, but nothing was displayed on the screen.
I tried listing the files inside /font and they were listed without problems.

kdschlosser Oct 2, 2025
Maintainer

Here is an example of how to set it up...

import lvgl as lv
import fs_driver
import machine
import time

from micropython import const

_HOST= const(2)
_MISO = const(...)
_MOSI = const(...)
_SCK = const(...)
_SD_CS = const(...)

# add code for initilizing the display
# if you have an SPI display and the display shares the same pins with the SDCard
# then you share the use of the bus instance. Make sure you pass a CS pin to
# both the display bus and also to the SDCard driver so it is able to switch
# between devices properly.
spi_bus = machine.SPI(host=_HOST, miso=_MISO, mosi=_MOSI, sck=_SCK)


while True:
    try:
        # sdcard once created will automatically be mounted to `./sdcard`
        sd_card = machine.SDCard(spi_bus=spi_bus, cs=_SD_CS)
        break
    except OSError:
        print('splease insert SD Card.. waiting 30 seconds')
        time.sleep_ms(30000)


fs_drv = lv.fs_drv_t()
fs_driver.fs_register(fs_drv, 'S')


scrn = lv.screen_active()
image = lv.image(scrn)
# notice the path. it is prefixed using the drive letter I assigned above when 
# the file system driver was created. Also notice the sdcard folder.. This is to
# acces the sdcard. 
image.set_src('S:sdcard/some_image.png')

import task_handler

th = task_handler.TaskHandler()

kwinter745321 · 2025-10-03T01:03:44Z

kwinter745321
Oct 3, 2025

Thanks for the error message. I will try to see how you got it. K

…

On Thu, Oct 2, 2025, 02:31 Kevin Schlosser ***@***.***> wrote: Here is an example of how to set it up... import lvgl as lvimport fs_driverimport machineimport time from micropython import const _HOST= const(2)_MISO = const(...)_MOSI = const(...)_SCK = const(...)_SD_CS = const(...) # add code for initilizing the display# if you have an SPI display and the display shares the same pins with the SDCard# then you share the use of the bus instance. Make sure you pass a CS pin to# both the display bus and also to the SDCard driver so it is able to switch# between devices properly.spi_bus = machine.SPI(host=_HOST, miso=_MISO, mosi=_MOSI, sck=_SCK) while True: try: # sdcard once created will automatically be mounted to `./sdcard` sd_card = machine.SDCard(spi_bus=spi_bus, cs=_SD_CS) break except OSError: print('splease insert SD Card.. waiting 30 seconds') time.sleep_ms(30000) fs_drv = lv.fs_drv_t()fs_driver.fs_register(fs_drv, 'S') scrn = lv.screen_active()image = lv.image(scrn)# notice the path. it is prefixed using the drive letter I assigned above when # the file system driver was created. Also notice the sdcard folder.. This is to# acces the sdcard. image.set_src('S:sdcard/some_image.png') import task_handler th = task_handler.TaskHandler() — Reply to this email directly, view it on GitHub <#142 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGF5YL2GOBYV46DKJN2LSR33VTBFHAVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJXGAZTAOA> . You are receiving this because you were mentioned.Message ID: <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14570308@ github.com>

0 replies

kwinter745321 · 2025-10-03T21:29:53Z

kwinter745321
Oct 3, 2025

Cotesmanoc-byte Just an update. I retested Video43 (per the RECAP below). Then I realized you must have built your own firmware. I rebuilt the firmware and I noticed that it is certainly using ESP-IDF 5.4.0. This builds MP 1.25.0 with LVGL 9.3.0 I used this command python3 make.py esp32 BOARD=ESP32_GENERIC_S3 VARIANT=SPIRAM_OCT DISPLAY=ili9341 INDEV=xpt2046 INDEV=gt911 After flashing the firmware, I retested. Two changes are needed: in [display_driver] change: import rgb_display_framework as rgb_display display = rgb_display.RGBDisplayDriver( Now the two test programs work again. Please let me know if this helps you. K RECAP Video43 I retested the Video 43 code and found it still works. You must load three files onto the flash of the ESP32. (1) display_driver.py, (2) ch422g.py, and (3) sdcard_driver.py. Then, the test_matrix2_lcdbus.py works without the sd card. For the test_button2_lcdbus.py program you will need to get a micro sdcard and create a folder called font on it. This folder should contain the font files from Video43.

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On Thu, Oct 2, 2025 at 9:03 PM Kevin Winter ***@***.***> wrote: Thanks for the error message. I will try to see how you got it. K On Thu, Oct 2, 2025, 02:31 Kevin Schlosser ***@***.***> wrote: > Here is an example of how to set it up... > > import lvgl as lvimport fs_driverimport machineimport time > from micropython import const > _HOST= const(2)_MISO = const(...)_MOSI = const(...)_SCK = const(...)_SD_CS = const(...) > # add code for initilizing the display# if you have an SPI display and the display shares the same pins with the SDCard# then you share the use of the bus instance. Make sure you pass a CS pin to# both the display bus and also to the SDCard driver so it is able to switch# between devices properly.spi_bus = machine.SPI(host=_HOST, miso=_MISO, mosi=_MOSI, sck=_SCK) > > while True: > try: > # sdcard once created will automatically be mounted to `./sdcard` > sd_card = machine.SDCard(spi_bus=spi_bus, cs=_SD_CS) > break > except OSError: > print('splease insert SD Card.. waiting 30 seconds') > time.sleep_ms(30000) > > fs_drv = lv.fs_drv_t()fs_driver.fs_register(fs_drv, 'S') > > scrn = lv.screen_active()image = lv.image(scrn)# notice the path. it is prefixed using the drive letter I assigned above when # the file system driver was created. Also notice the sdcard folder.. This is to# acces the sdcard. image.set_src('S:sdcard/some_image.png') > import task_handler > th = task_handler.TaskHandler() > > — > Reply to this email directly, view it on GitHub > <#142 (reply in thread)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/BGF5YL2GOBYV46DKJN2LSR33VTBFHAVCNFSM6AAAAABPOD2422VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINJXGAZTAOA> > . > You are receiving this because you were mentioned.Message ID: > <lvgl-micropython/lvgl_micropython/repo-discussions/142/comments/14570308 > @github.com> >

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Setting up LVGL+Micropython on ESP32-S3-Touch-LCD-4.3 from WaveShare #142

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