开启串口3接收中断

project/src/at32f403a_407_int.c

@@ -261,7 +261,10 @@ void USART2_IRQHandler(void)
 void USART3_IRQHandler(void)
 {
   /* add user code begin USART3_IRQ 0 */
-
+  if (SET == usart_flag_get(USART3, USART_RDBF_FLAG)) {
+    // usart_data_transmit(USART1, usart_data_receive(USART3));
+    usart_flag_clear(USART3, USART_RDBF_FLAG);
+  }
   /* add user code end USART3_IRQ 0 */
   /* add user code begin USART3_IRQ 1 */
 
@@ -298,7 +301,7 @@ void CAN2_RX0_IRQHandler(void)
     can_message_receive(CAN2, CAN_RX_FIFO0, &rx_message_struct);
     lwprintf("CAN2 RECV: ID = 0x%X\r\n", rx_message_struct.standard_id);
     lwprintf("---------------------\r\n| ");
-    for (uint8_t i = 0; i < 8; i++) {
+    for (uint8_t i = 0; i < rx_message_struct.dlc; i++) {
       lwprintf("0x%02X |", rx_message_struct.data[i]);
     }
     lwprintf("\r\n---------------------\r\n");