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[Bug] RP2040: only clear RX FIFO for serial pio driver clear (#18581)

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Stefan Kerkmann 2022-10-04 20:56:40 +02:00 committed by GitHub
parent 56f7b34289
commit b6ea8837e4
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1 changed files with 4 additions and 3 deletions
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7
platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c vendored
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@ -181,12 +181,13 @@ static inline void leave_rx_state(void) {}
#endif
/**
* @brief Clear the RX and TX hardware FIFOs of the state machines.
* @brief Clear the FIFO of the RX state machine.
*/
inline void serial_transport_driver_clear(void) {
osalSysLock();
pio_sm_clear_fifos(pio, rx_state_machine);
pio_sm_clear_fifos(pio, tx_state_machine);
while (!pio_sm_is_rx_fifo_empty(pio, rx_state_machine)) {
pio_sm_clear_fifos(pio, rx_state_machine);
}
osalSysUnlock();
}