Posted on April 07, 2016 at 15:11Hi,
I use 2 UART ports: UART1 for WiFi and UART4 for debug output.
My goal is to send to UART4 data I received on UART1.
When I use only 1 UART, it works (UART4), everything I typed on keyboard, returned back.
I implemented next:
char RX1[2], RX4[2];
SerialCrtl com4_ctrl, com1_ctrl; // structure for data buffer
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) /// callback function for UART, adding received data into buffer
{
if (huart->Instance == UART4) {
com4_ctrl.recv_buffer[com4_ctrl.recv_buffer_end++] = RX4[0];
HAL_UART_Receive_IT(&huart4, RX4, 1); //activate UART receive interrupt every time
} else if (huart->Instance == USART1) {
com1_ctrl.recv_buffer[com1_ctrl.recv_buffer_end++] = RX1[0];
HAL_UART_Receive_IT(&huart1, RX1, 1); //activate UART receive interrupt every time
}
}
and function for FreeRTOS (this works when I use only UART4):
void readCom(void const *pvParameters) {
com1_ctrl.recv_buffer_end = 0;
memset(com1_ctrl.recv_buffer, 0, sizeof(com1_ctrl.recv_buffer));
while(1) {
if (com1_ctrl.recv_buffer_end > 0) {
//strcpy(com4_ctrl.send_buffer, com4_ctrl.recv_buffer);
sprintf(com4_ctrl.send_buffer, ''OUT> [%s] [%d]\r\n'',
com4_ctrl.recv_buffer, com1_ctrl.recv_buffer_end);
com4_ctrl.send_buffer_length = strlen(com4_ctrl.send_buffer);
//HAL_UART_Transmit(&huart4, com4_ctrl.send_buffer, com4_ctrl.send_buffer_length, 1000);
HAL_UART_Transmit(&huart4, com1_ctrl.recv_buffer, com4_ctrl.recv_buffer_end, 1000);
HAL_Delay(100);
memset(com4_ctrl.send_buffer, 0, sizeof(com4_ctrl.send_buffer));
memset(com1_ctrl.recv_buffer, 0, sizeof(com1_ctrl.recv_buffer));
com4_ctrl.send_buffer_length = com1_ctrl.recv_buffer_end = com1_ctrl.recv_buffer_start = 0;
}
HAL_Delay(2000);
HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_14);
}
}
in main() I added these 2 lines for activation of interupt for UART:
HAL_UART_Receive_IT(&huart4, RX4, 1);
HAL_UART_Receive_IT(&huart1, RX1, 1);
I also tried without callback function, I added in thread function what only reads UARTs, but it works also only with one active UART.
Any idea what's wrong here?
Cheers
#freertos #hal #uart
