Question
UART_Mutex not working properly!
Dear friends,
I've created a UART mutex and when threads only send data over uart, everything works fine but when it is time to also receive data, after a while data is corrupted and the information is wrong and no data is valid!
if( osMutexWait(modbus_com1_mutex_id, MAX_MODBUS_MUTEX_TIMEOUT_MS) == osOK)
{
DE_SIGNAL_1_GPIO_Port->BSRR = DE_SIGNAL_1_Pin;
HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_RESET);
HAL_UART_Transmit(&HAL_UART_COM1_HANDLE, txBuff, (txSize + 2), 20);
DE_SIGNAL_1_GPIO_Port->BSRR = (uint32_t)DE_SIGNAL_1_Pin << 16U;
HAL_UART_Receive_IT(&HAL_UART_COM1_HANDLE, rxBuff, rxSize);
mb_rcvd = MH_MB_WaitforRespond(MH_MB_TIMEOUT_VALUE, COM_1);
if(mb_rcvd == MH_MB_OK)
{
HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_SET);
rcv_check = MH_Mod_RTU_Receive_Check(rxBuff);
if(rcv_check == MH_MB_OK)
{
osMutexRelease(modbus_com1_mutex_id);
return MH_MB_OK;
}
}
}if( osMutexWait(modbus_com1_mutex_id, MAX_MODBUS_MUTEX_TIMEOUT_MS) == osOK)
{
/* Transmit data over RS485 media */
DE_SIGNAL_1_GPIO_Port->BSRR = DE_SIGNAL_1_Pin;
HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_RESET);
HAL_UART_Transmit(&HAL_UART_COM1_HANDLE, txBuff, (txSize + 2), 20);
DE_SIGNAL_1_GPIO_Port->BSRR = (uint32_t)DE_SIGNAL_1_Pin << 16U;
HAL_UART_Receive_IT(&HAL_UART_COM1_HANDLE, rxBuff, rxSize);
/* Wait for the slave module to respond */
mb_rcvd = MH_MB_WaitforRespond(MH_MB_TIMEOUT_VALUE, COM_1);
if(mb_rcvd == MH_MB_OK)
{
HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_SET);
/* Check if received data is valid */
rcv_check = MH_Mod_RTU_Receive_Check(rxBuff);
if(rcv_check == MH_MB_OK)
{
osMutexRelease(modbus_com1_mutex_id);
return MH_MB_OK;
}
}
}Above is some part of the code related for handling the mutex and uart resource.
I'll be happy if anyone could help me with this problem.
Best regards,
Mujtaba