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UART enable disable f4 (#13019)

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Enable/disable the F4/AT32 UART TX before changing the TX pin mode
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Steve Evans 2023-08-09 12:10:15 +01:00 • committed by GitHub
parent a54bc47e1b
commit 807a7229c9
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2 changed files with 14 additions and 0 deletions
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7
src/main/drivers/stm32/serial_uart_stm32f4xx.c
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@ -232,6 +232,10 @@ 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
@ -249,6 +253,9 @@ void uartTxMonitor(uartPort_t *s)
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);