Merge branches 'master' and 'master' of http://git.brisky.space/btl143/QDAC-firmware

经测试确实是 ORE 置位导致无法退出中断（现象为反复进入中断 ORE 和 FE 置位） fix #1
目前将串口2接收中断暂时打开，看后续是否有需求使用

app/by_frame.c

@@ -16,7 +16,7 @@ void by_frame_init(void)
 {
     lwrb_init(&lwrb_ctx, frame_buffer_recv, sizeof(frame_buffer_recv)); // lwrb 最大元素数量为 buff 大小减一
     uart_init(BY_FRAME_UART_INDEX, BY_FRAME_UART_BAUDRATE, BY_FRAME_UART_TX_PIN, BY_FRAME_UART_RX_PIN);
-   // uart_rx_interrupt(BY_FRAME_UART_INDEX, ENABLE);
+    uart_rx_interrupt(BY_FRAME_UART_INDEX, ENABLE);
 }
 
 void by_frame_send(uint32_t *data_array)

app/by_frame.h

@@ -18,8 +18,6 @@
 
 #define BY_FRAME_DATA_NUM      (3)
 
-extern uint8_t frame_buffer[50];
-
 extern void by_frame_init(void);
 void by_frame_send(uint32_t *data_array);
 void by_frame_parse(uint32_t *data_array);

app/isr.c

@@ -94,6 +94,12 @@ void USART2_IRQHandler(void)
     if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) {
         USART_ClearITPendingBit(USART2, USART_IT_RXNE);
     }
+
+    if (USART_GetFlagStatus(USART2, USART_FLAG_ORE) != RESET) {
+
+        USART_ClearFlag(USART2, USART_FLAG_ORE); // <20><><EFBFBD><EFBFBD> ORE <20><>־λ
+        USART_ReceiveData(USART2);
+    }
 }
 void USART3_IRQHandler(void)
 {