Question
UART Not receive after some hour ,the EIE bit which normally must be at 1 when the UART does not work ,I find it at 0
Dear all,
This is my first time using UART, sorry if the question is not relevant.
I configured through the Device Configuration Tool the initial code for a STM32H745, in which I use the UART 1 with interrupt.
Everything works fine for several hours, even a whole day, then suddenly the UART 1 transmits but does not receive.
I analyzed the SFR files and I noticed that the only anomalous thing is the EIE bit of CR3 which instead of being at 1 is at 0.
I don't understand how I can go about handling this thing, I have implemented an ErrorCallback but without resolving.
I understand that the information I have given you is limited, but I ask you for help at least to get out of the situation when it happens.
I enclose part of the code concerned
Thank you in advance
main.c:
MX_USART1_UART_Init();
---------------------------------
usart.c:
#include "usart.h"
UART_HandleTypeDef huart1;
void MX_USART1_UART_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
}
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
if(uartHandle->Instance==USART1)
{
/** Initializes the peripherals clock
*/
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART1;
PeriphClkInitStruct.Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
/* USART1 clock enable */
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**USART1 GPIO Configuration
PB6 ------> USART1_TX
PB7 ------> USART1_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* USART1 interrupt Init */
HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);
}
}
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{
if(uartHandle->Instance==USART1)
{
__HAL_RCC_USART1_CLK_DISABLE();
/**USART1 GPIO Configuration
PB6 ------> USART1_TX
PB7 ------> USART1_RX
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6|GPIO_PIN_7);
HAL_NVIC_DisableIRQ(USART1_IRQn);
}
}
------------------------
comm.cabs
COMM_DATA commData;
void COMM_ErrorCallback(UART_HandleTypeDef *huart)
{
uint32_t errore;
errore = HAL_UART_GetError(huart);
__HAL_UART_CLEAR_OREFLAG(huart);
__HAL_UART_CLEAR_NEFLAG(huart);
__HAL_UART_CLEAR_FEFLAG(huart);
__HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
if(huart->Instance == UART_MODEM_INSTANCE)
{
HAL_UART_Receive_IT(UART_MODEM_HANDLE, (uint8_t*) &commData.modemRxChar, 1);
MONITOR_printf("%s %u\r\n","ERROR UART",errore);
}
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart->Instance == UART_MODEM_INSTANCE)
{
COMM_WriteCodaRx(UART_MODEM_ID, commData.modemRxChar);
HAL_UART_Receive_IT(UART_MODEM_HANDLE, (uint8_t*) &commData.modemRxChar, 1);
}
}
void COMM_ModemInitialize(void)
{
MX_USART1_UART_Init();
commData.pntWrCodaTx[UART_MODEM_ID] = 0;
commData.pntRdCodaTx[UART_MODEM_ID] = 0;
commData.runTx[UART_MODEM_ID] = 0;
commData.pntWrCodaRx[UART_MODEM_ID] = 0;
commData.pntRdCodaRx[UART_MODEM_ID] = 0;
HAL_UART_Receive_IT(UART_MODEM_HANDLE, (uint8_t*) &commData.modemRxChar, 1);
}