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Convert hello_interp.c:times_table to µPython #58

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Convert hello_interp.c:times_table to µPython #58

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Convert hello_interp.c:times_table to µPython
graeme-winter Jan 6, 2023
4a6ac01
Alias registers with sensible names
graeme-winter Jan 6, 2023
532a6b0
Typo
graeme-winter Jan 6, 2023
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26 changes: 26 additions & 0 deletions interp/interp.py
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Original file line number Diff line number Diff line change
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# demonstrate driving low level rp2040 functions from Python by
# direct register access - see datasheet at
# https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf
# for details

from machine import mem32

# base address of SIO
SIO_BASE = 0xD0000000

# INTERP0 registers
INTERP0_ACCUM0 = SIO_BASE + 0x80
INTERP0_BASE0 = SIO_BASE + 0x88
INTERP0_POP_LANE0 = SIO_BASE + 0x94
INTERP0_CTRL_LANE0 = SIO_BASE + 0xAC

# initialise lane 0 on interp: set that we are using all 32 bits
mem32[INTERP0_CTRL_LANE0] = 0x1F << 10

# set up 9 x table example - write to accum[0] and base[0] registers
mem32[INTERP0_ACCUM0] = 0
mem32[INTERP0_BASE0] = 9

# read pop register 10 times
for j in range(10):
print(mem32[INTERP0_POP_LANE0])