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authorStefan Kerkmann <karlk90@pm.me>2022-10-04 20:56:40 +0200
committerGitHub <noreply@github.com>2022-10-04 19:56:40 +0100
commitb6ea8837e4c81f364d30bdc74bf2cdccb2a1a185 (patch)
tree9d98fb8bf7ab2b65bfa30d573557937acc46c402 /platforms/chibios/drivers
parent56f7b34289e7f80ac540a7c9c01a5c3a3838cd7c (diff)
[Bug] RP2040: only clear RX FIFO for serial pio driver clear (#18581)
Diffstat (limited to 'platforms/chibios/drivers')
-rw-r--r--platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c b/platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c
index afd7e65ad8..dd4723a086 100644
--- a/platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c
+++ b/platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c
@@ -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();
}