how can i programming uart interrupt(sd_lld_read)?

[BKIM.11]

hello,

I am using the SPC582b and SPC5stdio.

I want to have interrupts run whenever I receive data.

But This function is difficult because it waits until input is received

(sd_lld_read, &lcd_data[bit], 1)

How can I implement an uart interrupt?

I need your help.

Thank you.

[Erwan YVIN · Accepted solution]

Hello ,

You can use a thread by using a RTOS like Chibios or FreeRTOS

or you can adapt the driver presents in this followin g file

**
 * @brief   Serial read without DMA
 *
 * @param[in] sdp       pointer to a @p SerialDriver object
 * @param[out] buffer   data buffer receiver
 * @param[out] len      number of bytes received
 *
 * @return              The number of bytes effectively read.
 *
 * @notapi
 */
static uint16_t sd_rx(SerialDriver* sdp, uint8_t* buffer, uint16_t len) {
 
  if (len > 0UL) {
    if(sdp->config->api_mode == SPC5_LIN_API_MODE_BUFFERED_IO) {
      uint16_t l = len;
      sdp->linflexlp->LINIER.B.DRIE = 0;
      while (l != 0U) {
        if (sdp->rx_read_ptr != sdp->rx_write_ptr) {
          sdp->linflexlp->LINIER.B.DRIE = 0;
          *buffer++ = *sdp->rx_read_ptr++;
          if (sdp->rx_read_ptr == sdp->rx_end_ptr) {
            sdp->rx_read_ptr = sdp->rx_buffered_io;
          }
          l--;
        } else {
             sdp->linflexlp->LINIER.B.DRIE = 1;
        }
      }
      sdp->linflexlp->LINIER.B.DRIE = 1;
    } else {
      sdp->rx_buf = buffer;
      sdp->rx_len = len;
      sdp->linflexlp->LINIER.R |= (uint16_t)(SPC5_LINIER_DRIE | SPC5_LIN_INTERRUPTS); /* Interrupts enabled. */
      sdp->linflexlp->UARTCR.B.RXEN = 1;
    }
  }
  return len;
}

Best Regards

Erwan