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Tri-state USART TX output if load due to powered down peripheral is detected (#12760)

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Tri-state USART TX output if loaded due to powered down peripheral being detected
This commit is contained in:
Steve Evans 2023-05-10 02:53:35 +01:00 • committed by GitHub
parent cbaf9b0265
commit 4dc04d6a33
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GPG key ID: 4AEE18F83AFDEB23
11 changed files with 239 additions and 28 deletions
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13
src/main/drivers/stm32/serial_uart_stm32g4xx.c
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@ -279,6 +279,8 @@ uartPort_t *serialUART(UARTDevice_e device, uint32_t baudRate, portMode_e mode,
s->port.rxBufferSize = hardware->rxBufferSize;
s->port.txBufferSize = hardware->txBufferSize;
s->checkUsartTxOutput = checkUsartTxOutput;
#ifdef USE_DMA
uartConfigureDma(uartdev);
#endif
@ -292,6 +294,8 @@ uartPort_t *serialUART(UARTDevice_e device, uint32_t baudRate, portMode_e mode,
IO_t txIO = IOGetByTag(uartdev->tx.pin);
IO_t rxIO = IOGetByTag(uartdev->rx.pin);
uartdev->txPinState = TX_PIN_IGNORE;
if ((options & SERIAL_BIDIR) && txIO) {
ioConfig_t ioCfg = IO_CONFIG(
((options & SERIAL_INVERTED) || (options & SERIAL_BIDIR_PP) || (options & SERIAL_BIDIR_PP_PD)) ? GPIO_MODE_AF_PP : GPIO_MODE_AF_OD,
@ -304,7 +308,14 @@ uartPort_t *serialUART(UARTDevice_e device, uint32_t baudRate, portMode_e mode,
} else {
if ((mode & MODE_TX) && txIO) {
IOInit(txIO, OWNER_SERIAL_TX, RESOURCE_INDEX(device));
IOConfigGPIOAF(txIO, IOCFG_AF_PP, uartdev->tx.af);
if ((options & SERIAL_INVERTED) == SERIAL_NOT_INVERTED) {
uartdev->txPinState = TX_PIN_ACTIVE;
// Switch TX to an input with pullup so it's state can be monitored
uartTxMonitor(s);
} else {
IOConfigGPIOAF(txIO, IOCFG_AF_PP, uartdev->tx.af);
}
}
if ((mode & MODE_RX) && rxIO) {