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

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merged 1 commit into from
Oct 4, 2022
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[Bug] RP2040: only clear RX FIFO for serial pio driver clear #18581

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7 changes: 4 additions & 3 deletions platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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();
}

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