UART2 VCP L432KC

[Abijith]

while (1)

{

/* USER CODE END WHILE */

if (HAL_UART_Receive(&huart2, data, 10, 100) == HAL_OK) {

HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, 1);

HAL_Delay(200);

HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, 0);

HAL_Delay(200);

}

/* USER CODE BEGIN 3 */

}

This is my code to check if I am sending any data from Putty/Realterm/Docklight to UART2 and then blinking the in built LED. What are some reasons this might not be working? I tried this in interrupt mode as well.

[Roger SHIVELY]

Hello @Abijith 

This post has been escalated to the ST Online Support Team for additional assistance.  We'll contact you directly.

Regards,

Roger

[Tesla DeLorean]

Can't we please just have FAE's, or whomever, just come and answer simple questions directly?

[Tesla DeLorean]

Well it's going to repeatedly fail if you don't get 10 characters in 100 ms, like you pressing continuously.

Then slacking off for 400 ms when no reception can occur and you'll get overrun or other errors due to inattention.

You'd do better with a simple echo back

while(1)
{
  if ((USART2->ISR & USART_ISR_RXNE) == 0) // Wait for Char
  {
    if (USART2->ISR & USART_ISR_ORE) // Overrun Error
      USART2->ICR = USART_ICR_ORECF;
    if (USART2->ISR & USART_ISR_NE) // Noise Err
      USART2->ICR = USART_ICR_NCF;
    if (USART2->ISR & USART_ISR_FE) // Framing Error
      USART2->ICR = USART_ICR_FECF;
  }
  else // RXNE
    USART2->TDR = USART2->RDR; // Read Char, Echo
}

[Pavel A.]

@Abijith The timeout 100 ms is probably too short. Try something like 10000 ms (10s) or indefinite.