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avrdude
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Fix Ardino sync attempts 

In order for the Arduino bootloader to re-sync with Avrdude, the microcontroller needs to be reset to start the bootloader again.
This commit is contained in:
MCUdude 2022-01-29 19:53:42 +01:00
parent 4ff72ac462
commit 28be45d8b6
1 changed files with 8 additions and 0 deletions
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8
src/stk500.c
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@ -111,6 +111,14 @@ int stk500_getsync(PROGRAMMER * pgm)
max_sync_attempts = MAX_SYNC_ATTEMPTS; max_sync_attempts = MAX_SYNC_ATTEMPTS;
for (attempt = 0; attempt < max_sync_attempts; attempt++) { for (attempt = 0; attempt < max_sync_attempts; attempt++) {
// Restart Arduino bootloader for every sync attempt
if (strcmp(pgm->type, "Arduino") == 0 && attempt > 0) {
serial_set_dtr_rts(&pgm->fd, 0); // Set DTR and RTS low
usleep(250*1000);
serial_set_dtr_rts(&pgm->fd, 1); // Set DTR and RTS back to high
usleep(50*1000);
stk500_drain(pgm, 0);
}
stk500_send(pgm, buf, 2); stk500_send(pgm, buf, 2);
stk500_recv(pgm, resp, 1); stk500_recv(pgm, resp, 1);
if (resp[0] == Resp_STK_INSYNC){ if (resp[0] == Resp_STK_INSYNC){