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- /**
- ************************************************************************************************
- * @文件 : uart1.c
- * @作者 : 樊春春
- * @版本 : V1.0
- * @时间 : 2022/05/31 20:20:39
- * @邮箱 : [email protected]
- * @说明 : uart1底层驱动,待修复
- ************************************************************************************************
- **/
- #include "uart1.h"
- #include "queue.h"
- static INT8U uart1_tx_buf[UART1_TX_LEN] = {0};
- static INT8U uart1_rx_buf[UART1_REC_LEN] = {0};
- UartFrame_TypeDef Uart1FrameStruct[UART1_MAX_MSG_NUM];
- extern OS_EVENT *uart1_mbox;
- void uart1_nvic_config(void)
- {
- NVIC_InitTypeDef NVIC_InitStructure;
- // Usart1 NVIC 配置
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //串口1中断通道
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; // IRQ通道使能
- NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器
- }
- void uart1_dma_init(void)
- {
- DMA_InitTypeDef DMA_InitStructure;
- if ((u32)UART1_DMA_TXCH > (u32)DMA2) //得到当前stream是属于DMA2还是DMA1
- {
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); // DMA2时钟使能
- }
- else
- {
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE); // DMA1时钟使能
- }
- DMA_DeInit(UART1_DMA_TXCH);
- while (DMA_GetCmdStatus(UART1_DMA_TXCH) != DISABLE)
- {
- } //等待DMA可配置
- /* 配置 DMA Stream */
- DMA_InitStructure.DMA_Channel = UART1_DMA; //通道选择
- DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR; // DMA外设地址
- DMA_InitStructure.DMA_Memory0BaseAddr = (u32)uart1_tx_buf; // DMA 存储器0地址
- DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; //存储器到外设模式
- DMA_InitStructure.DMA_BufferSize = UART1_TX_LEN; //数据传输量
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设非增量模式
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //存储器增量模式
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; //外设数据长度:8位
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; //存储器数据长度:8位
- DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // 使用普通模式
- DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; //中等优先级6
- DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
- DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
- DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; //存储器突发单次传输
- DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; //外设突发单次传输 // DMA 存储器0地址
- DMA_Init(UART1_DMA_TXCH, &DMA_InitStructure); //初始化DMA Stream
- if ((u32)UART1_DMA_RXCH > (u32)DMA2) //得到当前stream是属于DMA2还是DMA1
- {
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); // DMA2时钟使能
- }
- else
- {
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE); // DMA1时钟使能
- }
- DMA_DeInit(UART1_DMA_RXCH);
- while (DMA_GetCmdStatus(UART1_DMA_RXCH) != DISABLE)
- {
- }
- DMA_InitStructure.DMA_Channel = UART1_DMA; //通道选择
- DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR; // DMA外设地址
- DMA_InitStructure.DMA_Memory0BaseAddr = (u32)uart1_rx_buf; // DMA 存储器0地址
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; //外设到存储器模式
- DMA_InitStructure.DMA_BufferSize = UART1_REC_LEN; //数据传输量
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设非增量模式
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //存储器增量模式
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; //外设数据长度:8位
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; //存储器数据长度:8位
- DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; // 使用循环模式
- DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; //中等优先级
- DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
- DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
- DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; //存储器突发单次传输
- DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; //外设突发单次传输
- DMA_Init(UART1_DMA_RXCH, &DMA_InitStructure);
- }
- void uart1_config(void)
- {
- USART_InitTypeDef USART_InitStructure;
- USART_InitStructure.USART_BaudRate = 9600; //波特率设置
- USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长为8位数据格式
- USART_InitStructure.USART_StopBits = USART_StopBits_1; //一个停止位
- USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验位
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件数据流控制
- USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
- USART_Init(USART1, &USART_InitStructure); //初始化串口1
- USART_Cmd(USART1, ENABLE); //使能串口1
- }
- void Uart1DMA_Enable(DMA_Stream_TypeDef *DMA_Streamx, u16 count)
- {
- DMA_Cmd(DMA_Streamx, DISABLE); //关闭DMA传输
- while (DMA_GetCmdStatus(DMA_Streamx) != DISABLE)
- {
- } //确保DMA可以被设置
- DMA_SetCurrDataCounter(DMA_Streamx, count); //数据传输量
- DMA_Cmd(DMA_Streamx, ENABLE); //开启DMA传输
- }
- void uart1_init(void)
- {
- uart1_config();
- uart1_dma_init();
- uart1_nvic_config();
- /* USART DMA enable*/
- USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE); // 使能串口DMA接收数据
- Uart1DMA_Enable(UART1_DMA_RXCH, UART1_REC_LEN);
- /*configure DMA interrupt*/
- USART_ITConfig(USART1, USART_IT_IDLE, ENABLE); //开启空闲中断
- USART_ITConfig(USART1, USART_IT_TC, ENABLE);
- }
- /****************************************************
- * 函 数 名:Uart1_Send_Data
- * 函数功能:串口1发送数据
- * 入口参数:buf 待发送数据 len 数据长度
- * 说 明:
- *****************************************************/
- void Uart1_Send_Data(const u8 *buf, u16 len)
- {
- u8 i;
- for (i = 0; i < len; i++) //循环发送数据
- {
- while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
- ;
- USART_SendData(USART1, buf[i]);
- }
- while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
- ;
- }
- void uart1_dma_send(const INT8U *buf, INT16U len)
- {
- if (RESET != DMA_GetFlagStatus(UART1_DMA_TXCH, DMA_FLAG_TCIF7))
- {
- DMA_ClearFlag(UART1_DMA_TXCH, DMA_FLAG_TCIF7);
- }
- if (len > UART1_TX_LEN)
- {
- len = UART1_TX_LEN;
- }
- memcpy(uart1_tx_buf, buf, len);
- USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE); // 使能DMA串口发送数据
- Uart1DMA_Enable(UART1_DMA_TXCH, len);
- }
- void USART1_IRQHandler(void)
- {
- static INT8U u1_index = 0;
- volatile INT8U clear = 0;
- INT8U rec_cnt = 0;
- if (RESET != USART_GetITStatus(USART1, USART_IT_IDLE))
- {
- clear = USART1->SR;
- clear = USART1->DR; // 先读SR, 再读DR, 就是为了消除IDLE中断
- DMA_Cmd(UART1_DMA_RXCH, DISABLE);
- DMA_ClearFlag(UART1_DMA_RXCH, DMA_FLAG_TCIF5);
- rec_cnt = UART1_REC_LEN - DMA_GetCurrDataCounter(UART1_DMA_RXCH); // 获得接收帧帧长 特别注意: 帧长不是DMA_GetCurrDataCounter(DMA2_Stream5)
- memcpy(Uart1FrameStruct[u1_index].buf, uart1_rx_buf, rec_cnt);
- Uart1FrameStruct[u1_index].len = rec_cnt;
- OSMboxPost(uart1_mbox, &Uart1FrameStruct[u1_index]);
- if (u1_index < UART1_MAX_MSG_NUM - 1)
- {
- u1_index++;
- }
- else
- {
- u1_index = 0;
- }
- DMA_SetCurrDataCounter(UART1_DMA_RXCH, UART1_REC_LEN);
- DMA_Cmd(UART1_DMA_RXCH, ENABLE);
- }
- else if (RESET != USART_GetITStatus(USART1, USART_IT_TC))
- {
- USART_ClearITPendingBit(USART1, USART_IT_TC); // 清除发送完成标标志位
- Uart1DMA_Enable(UART1_DMA_RXCH, UART1_REC_LEN); // DMA接收使能
- DMA_Cmd(UART1_DMA_TXCH, DISABLE); // 关闭发送DMA
- DMA_SetCurrDataCounter(UART1_DMA_TXCH, 0); // 清除发送数据长度
- }
- }
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