Skip to content

Adjust SerialPIO flush timeouts #3257

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
earlephilhower merged 1 commit into from
Dec 7, 2025
+2 −2
Merged

Adjust SerialPIO flush timeouts #3257

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions cores/rp2040/SerialPIO.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -355,10 +355,10 @@ void SerialPIO::flush() {
return;
}
while (!pio_sm_is_tx_fifo_empty(_txPIO, _txSM)) {
delay(1); // Wait for all FIFO to be read
/* noop */ // Busy wait for all FIFO to be read
}
// Could have 1 byte being transmitted, so wait for bit times
delay((1000 * (_txBits + 1)) / _baud);
delayMicroseconds((1000000 * (_txBits + 3 /* start + stop + parity */)) / _baud);
}

size_t SerialPIO::write(uint8_t c) {
Expand Down