Framing error generated after RS485 plugging and unplugging Hello everyone, I encountered a problem while using STM32L431 for RS485 development. I used the ISO7041 isolation chip, and in the initial state, the DE pin is low, while both TX and RX are high. The current issue is that when I turn on the power, reset, and plug in 485, both the transmission and reception of 485 are normal. However, when I unplugged and inserted 485 again, an FE error occurred. Why is this? Is it because the voltage level does not match after inserting 485?Debugging found errorsflags=2, which should be FE errors。Here is some of my code： int main()
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_LPUART1_UART_Init();
HAL_GPIO_WritePin(DE485_GPIO_Port, DE485_Pin, GPIO_PIN_RESET);
initSqQueue(&uart[_LPCOM].Rx, lpuartRxBuff, sizeof(lpuartRxBuff));
initSqQueue(&uart[_LPCOM].Tx, lpuartTxBuff, sizeof(lpuartTxBuff));
__HAL_UART_ENABLE_IT(&hlpuart1, UART_IT_RXNE);
__HAL_UART_ENABLE_IT(&hlpuart1, UART_IT_IDLE);
while(1)
{
Process_Modbus_R
