- LOCALvoiduart0_rx_intr_handler(void*para)
- {
- /* uart0 and uart1 intr combine togther, when interrupt occur, see reg 0x3ff20020, bit2, bit0 represents
- * uart1 and uart0 respectively
- */ uint8 RcvChar;
- uint8 uart_no = UART0;//UartDev.buff_uart_no;
- uint8 fifo_len =0;
- uint8 buf_idx =0;
- //uint8 fifo_tmp[128] = {0};//只是告诉我们这个单片机的内部FIFO是128字节大小
- uint32 uart_intr_status = READ_PERI_REG(UART_INT_ST(uart_no)) ;//读取中断状态
- while(uart_intr_status !=0x0)
- {
- if(UART_FRM_ERR_INT_ST == (uart_intr_status & UART_FRM_ERR_INT_ST))// 接收帧错误中断,,,可能是数据位数不对,或者接收到的数据不满8bit...等等
- {
- WRITE_PERI_REG(UART_INT_CLR(uart_no), UART_FRM_ERR_INT_CLR);// 清除中断寄存器的 帧错误位
- }
- elseif(UART_RXFIFO_FULL_INT_ST == (uart_intr_status & UART_RXFIFO_FULL_INT_ST))//进入FIFO满中断
- {
- fifo_len = (READ_PERI_REG(UART_STATUS(UART0)) >> UART_RXFIFO_CNT_S)&UART_RXFIFO_CNT;//读出来内部FIFO缓存的数据个数
- while(fifo_len--)
- {
- if(Usart1ReadCnt
- Usart1ReadBuff[Usart1ReadCnt] = READ_PERI_REG(UART_FIFO(UART0)) &0xFF;//取出来一个数据
- Usart1ReadCnt++;
- }
- else
- {
- Usart1ReadCnt =0;
- }
- }
- WRITE_PERI_REG(UART_INT_CLR(UART0), UART_RXFIFO_FULL_INT_CLR);// 清除满中断
- }
- elseif(UART_RXFIFO_TOUT_INT_ST == (uart_intr_status & UART_RXFIFO_TOUT_INT_ST))//空闲中断,证明接受到了一条完整的数据
- {
- fifo_len = (READ_PERI_REG(UART_STATUS(UART0)) >> UART_RXFIFO_CNT_S)&UART_RXFIFO_CNT;//读出来接收的数据个数
- while(fifo_len--)
- {
- if(Usart1ReadCnt
- Usart1ReadBuff[Usart1ReadCnt] = READ_PERI_REG(UART_FIFO(UART0)) &0xFF;//取出来一个数据
- Usart1ReadCnt++;
- }
- else
- {
- Usart1ReadCnt =0;
- }
- }
- Usart1ReadCntCopy = Usart1ReadCnt;//串口1接收到的数据个数拷贝
- Usart1ReadCnt =0;
- Usart1ReadFlage=1;//串口1接收到一条完整数据
- WRITE_PERI_REG(UART_INT_CLR(UART0), UART_RXFIFO_TOUT_INT_CLR);// 清除空闲标志位
- }
- elseif(UART_TXFIFO_EMPTY_INT_ST == (uart_intr_status & UART_TXFIFO_EMPTY_INT_ST))//发送FIFO里面的数据个数少于20个,进入中断
- {
- WRITE_PERI_REG(UART_INT_CLR(uart_no), UART_TXFIFO_EMPTY_INT_CLR);// 清除中断标志
- CLEAR_PERI_REG_MASK(UART_INT_ENA(UART0), UART_TXFIFO_EMPTY_INT_ENA);//清除中断
- }
- else
- {
- //skip
- }
- uart_intr_status = READ_PERI_REG(UART_INT_ST(uart_no)) ;
- }
- }
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