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OLS Improvements #51

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8ea06d6
ols: Clean up: Obey code style
v1ne Jan 23, 2021
e5dc9e6
ols: Provide sample count in RLE mode
v1ne Feb 23, 2021
86bf1d5
ols: Don't store temporary data in device context
v1ne Feb 23, 2021
fd87a59
ols: Don't silently ignore error when setting up the device
v1ne Feb 23, 2021
23f9047
ols: Fix demuxer operation
v1ne Feb 23, 2021
b3ef78e
ols: Fix off-by-one when setting up trigger stages
v1ne Feb 23, 2021
6621a22
ols: Adjust pre-trigger delay
v1ne Feb 23, 2021
c67f087
ols: Flip samples after reading everything
v1ne Feb 23, 2021
f05c040
ols: Use a dynamic sample buffer
v1ne Feb 23, 2021
84d6e00
ols: Be more robust against short reads
v1ne Feb 23, 2021
72fae1a
ols: Make resetting more robust, reset at the end
v1ne Feb 23, 2021
7fc0db4
ols: Clean up: Rename variables, remove misleading counter
v1ne Feb 23, 2021
3a39f13
ols: Clean up: Always keep sample_buf_size up to date
v1ne Feb 23, 2021
05e39c5
ols: Communicate internally that the number of samples is a multiple …
v1ne Feb 23, 2021
1a2437b
ols: Immediately process data after expected sample count
v1ne Feb 23, 2021
e068d80
ols: Receive many bytes in a row
v1ne Feb 23, 2021
fadfd5e
ols: Capture multiple bytes at once
v1ne Feb 23, 2021
e58ecb2
ols: Determine the right trigger point when using RLE
v1ne Feb 23, 2021
6af1de2
ols: Support Demon Core RLE mode 3
v1ne Feb 23, 2021
5696a4d
ols: Add support for advanced triggers
v1ne Feb 23, 2021
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10 changes: 7 additions & 3 deletions src/hardware/openbench-logic-sniffer/protocol.c
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Original file line number Diff line number Diff line change
Expand Up @@ -397,6 +397,7 @@ SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data)
uint32_t sample;
unsigned int i, j, num_changroups;
unsigned char byte;
gboolean received_a_byte;

(void)fd;

Expand All @@ -416,9 +417,10 @@ SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data)
}
}

if (revents == G_IO_IN) {
if (serial_read_nonblocking(serial, &byte, 1) != 1)
return FALSE;
received_a_byte = FALSE;
while (revents == G_IO_IN &&
serial_read_nonblocking(serial, &byte, 1) == 1) {
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As mentioned before, I have a OLS clone with 1MB of memory. This may be a bit too much to poll in one go? Dunno what a reasonable size for chunks would be? 64KB?

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I agree to not block the event loop, though the device would have respond pretty quickly to not cause serial_read_nonblocking to return nothing (assuming the latter really doesn't block). Nonetheless, to be safe, I added a safeguard to "ols: Capture multiple bytes at once".

received_a_byte = TRUE;
devc->cnt_rx_bytes++;

devc->raw_sample[devc->raw_sample_size++] = byte;
Expand Down Expand Up @@ -527,6 +529,8 @@ SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data)
devc->rle_count = 0;
}
}
if (revents == G_IO_IN && !received_a_byte)
return FALSE;

process_and_forward:
if (revents != G_IO_IN ||
Expand Down