Mirror/betaflight
1
0
Fork 0
mirror of https://github.com/betaflight/betaflight.git synced 2025-07-24 16:55:36 +03:00
Code Issues Wiki Activity

4.4 maintenance uart enable/disable f4 (#13020)

Browse source 
Enable/disable the F4 UART TX before changing the TX pin mode
This commit is contained in:
Steve Evans 2023-08-09 12:10:39 +01:00 • committed by GitHub
parent bd68d3d4a9
commit 7294af8590
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/main/drivers/serial_uart_stm32f4xx.c
View file

@ -230,6 +230,10 @@ bool checkUsartTxOutput(uartPort_t *s)
// Enable USART TX output
uart->txPinState = TX_PIN_ACTIVE;
IOConfigGPIOAF(txIO, IOCFG_AF_PP, uart->hardware->af);
// Enable the UART transmitter
SET_BIT(s->USARTx->CR1, USART_CR1_TE);
return true;
} else {
// TX line is pulled low so don't enable USART TX
@ -243,9 +247,13 @@ bool checkUsartTxOutput(uartPort_t *s)
void uartTxMonitor(uartPort_t *s)
{
uartDevice_t *uart = container_of(s, uartDevice_t, port);
IO_t txIO = IOGetByTag(uart->tx.pin);
if (uart->txPinState == TX_PIN_ACTIVE) {
IO_t txIO = IOGetByTag(uart->tx.pin);
// Disable the UART transmitter
CLEAR_BIT(s->USARTx->CR1, USART_CR1_TE);
// Switch TX to an input with pullup so it's state can be monitored
uart->txPinState = TX_PIN_MONITOR;
IOConfigGPIO(txIO, IOCFG_IPU);