djsundog
/
circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

rp2/machine_uart: Handle and clear UART RX timeout IRQ. 

The pico-sdk 1.3.0 update in 97a7cc243b
introduced a change that broke RP2 Bluetooth UART, and possibly UART in
general, which stops working right after UART is initialized.  The commit
raspberrypi/pico-sdk@2622e9b enables the UART receive timeout (RTIM) IRQ,
which is asserted when the receive FIFO is not empty, and no more
characters are received for a period of time.

This commit makes sure the RTIM IRQ is handled and cleared in
uart_service_interrupt.
This commit is contained in:
iabdalkader 2021-12-10 01:27:45 +02:00 committed by Damien George
parent 5adb1fa40e
commit f21c565583
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
ports/rp2/machine_uart.c
View File

@ -126,7 +126,7 @@ STATIC void uart_fill_tx_fifo(machine_uart_obj_t *self) {
}
STATIC inline void uart_service_interrupt(machine_uart_obj_t *self) {
if (uart_get_hw(self->uart)->mis & UART_UARTMIS_RXMIS_BITS) { // rx interrupt?
if (uart_get_hw(self->uart)->mis & (UART_UARTMIS_RXMIS_BITS | UART_UARTMIS_RTMIS_BITS)) { // rx interrupt?
// clear all interrupt bits but tx
uart_get_hw(self->uart)->icr = UART_UARTICR_BITS & (~UART_UARTICR_TXIC_BITS);
if (!self->read_lock) {