1 static void uart_isr(struct rt_serial_device *serial) 2 { 3 struct stm32_uart *uart = (struct stm32_uart *) serial->parent.user_data; 4 5 RT_ASSERT(uart != RT_NULL); 6 //isr_index++; 7 if(USART_GetITStatus(uart->uart_device, USART_IT_RXNE) != RESET) 8 { 9 10 if(USART_GetFlagStatus(uart->uart_device, USART_FLAG_PE) == RESET) 11 { 12 13 rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND); 14 } 15 /* clear interrupt */ 16 USART_ClearITPendingBit(uart->uart_device, USART_IT_RXNE); 17 } 18 #ifdef RT_SERIAL_USING_DMA 19 if(USART_GetITStatus(uart->uart_device, USART_IT_IDLE) != RESET) 20 { 21 dma_uart_rx_idle_isr(serial); 22 } 23 #endif /* RT_SERIAL_USING_DMA */ 24 if (USART_GetITStatus(uart->uart_device, USART_IT_TC) != RESET) 25 { 26 /* clear interrupt */ 27 if(serial->parent.open_flag & RT_DEVICE_FLAG_INT_TX) 28 { 29 rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DONE); 30 } 31 USART_ITConfig(uart->uart_device, USART_IT_TC, DISABLE); 32 USART_ClearITPendingBit(uart->uart_device, USART_IT_TC); 33 } 34 if (USART_GetFlagStatus(uart->uart_device, USART_FLAG_ORE) == SET) // overrun error 35 { 36 USART_ReceiveData(uart->uart_device); 37 } 38 }
加上这篇文章（https://shequ.stmicroelectronics.cn/forum.php?mod=viewthread&tid=613968），注意串口数据接收
