/******************************************************************************************* * File Name: Serial.c * Function Describe:device for serial * Relate Module: * Explain: 接收采用中断方式 UART1: 连接尾插，用于与PC相连 另外，printf映射到UART1 UART2: 连接GPS UART3: 连接Modem 全局变量g_ucUARTSel 调试选择控制，决定了3个串口的转发关系,其值通过以下3个宏控分别代表： COM_SEL_MCU 正常使用不转发,尾插用于MCU打印LOG或 MCU软件升级 COM_SEL_GPS UART1<-->UART2,尾插用于GPS LOG打印 COM_SEL_MODEM UART1<-->UART3,尾插用于MODEM AT momand 或模块软件升级 * Writer: ShiLiangWen * Date: 2015.1.20 ********************************************************************************************/ #include "Serial.h" #include "stm32f10x_dma.h" #include "includes.h" #define USART1_DR_Base 0x40013804 #define USART2_DR_Base 0x40004404 #define USART3_DR_Base (u32)&USART3->DR unsigned char g_ucUARTSel=0;//0--MCU 1--Modem 2--GPS //UART1 Trace unsigned char RxBuffer1[UART1_RX_BUFFER_SIZE]; unsigned char TxBuffer1[UART1_TX_BUFFER_SIZE]; unsigned char g_ucUart1Received=0;//接受到一包数据标志位 unsigned char g_ucUart1Sending=0;//仍有数据待发送标志 unsigned short rx1_ct=0,rx1_len=0; unsigned short tx1_ct=0,tx1_len=0; unsigned short g_usRx1In; unsigned short g_usRx1Len; unsigned char g_ucRxnestart; unsigned char g_ucRxneCnt; unsigned char g_ucRxneOver; //UART3 用于与MODEM通讯 unsigned char RxBuffer3[UART3_RX_BUFFER_SIZE]; unsigned char TxBuffer3[UART3_TX_BUFFER_SIZE]; unsigned char g_ucUart3Received=0;//接受到一包数据标志位 unsigned char g_ucUart3Sending=0;//仍有数据待发送标志 static unsigned short rx3_ct=0,rx3_ct_max=0,rx3_len=0; static unsigned short tx3_ct=0,tx3_len=0; /******************************************************************** *Uart1DMAInit *串口1 DMA设置 *串口1 发送必须用通道4，接收必须用通道5 *********************************************************************/ void Uart1DMAInit(void) { NVIC_InitTypeDef NVIC_InitStructure; DMA_InitTypeDef DMA_InitStructure; //启动DMA时钟 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //DMA 通道4用于UART1 TX DMA_DeInit(DMA1_Channel4); DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&USART1->DR);//外设地址 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer1;//内存地址 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;//DMA传输方向单向 DMA_InitStructure.DMA_BufferSize = UART1_TX_BUFFER_SIZE; //设置DMA在传输时缓冲区的长度 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //设置DMA的外设递增模式 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //设置DMA的内存递增模式 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//外设数据字长 DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;//内存数据字长 DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; //设置DMA的传输模式 DMA_InitStructure.DMA_Priority = DMA_Priority_Low; //设置DMA的优先级别 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//设置DMA的2个memory中的变量互相访问 DMA_Init(DMA1_Channel4,&DMA_InitStructure); //DMA中断设置 NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); DMA_ITConfig(DMA1_Channel4,DMA_IT_TC,ENABLE);//中断设置 DMA_Cmd(DMA1_Channel4, DISABLE); //等到需要发送的时候再使能 //DMA 通道5用于UART1 RX DMA_DeInit(DMA1_Channel5); DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&USART1->DR);//外设地址 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxBuffer1;//内存地址 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//DMA传输方向单向 DMA_InitStructure.DMA_BufferSize = UART1_RX_BUFFER_SIZE; //设置DMA在传输时缓冲区的长度 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //设置DMA的外设递增模式 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //设置DMA的内存递增模式 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//外设数据字长 DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;//内存数据字长 DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; //设置DMA的传输模式 DMA_InitStructure.DMA_Priority = DMA_Priority_High; //设置DMA的优先级别 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//设置DMA的2个memory中的变量互相访问 DMA_Init(DMA1_Channel5,&DMA_InitStructure); DMA_Cmd(DMA1_Channel5, ENABLE); //使能通道 } /******************************************************************** *Uart3DMAInit *串口3 DMA设置 *串口3 发送必须用通道2，接收必须用通道3 *********************************************************************/ void Uart3DMAInit(void) { } /********************************************************************************************* *UART3RxTxISRHandler *串口3中断处理函数 **********************************************************************************************/ void UART3RxTxISRHandler(void) { } void Uart1Send(char *txbuf,int len) { int i; for(i=0;i=UART1_RX_BUFFER_SIZE)g_usRx1In=0; g_usRx1Len++; } } USART_ClearITPendingBit(USART1,USART_IT_RXNE); //清除中断标志 } if(USART_GetFlagStatus(USART1,USART_FLAG_ORE)==SET) { assert_param(IS_USART_CLEAR_FLAG(USART_FLAG_ORE)); USART_ReceiveData(USART1); // USART_ClearFlag(USART1,USART_FLAG_ORE); // } } /******************************************************************************* Uart1Init Use for Trace *******************************************************************************/ void Uart1Init(void) { NVIC_InitTypeDef NVIC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1,ENABLE); /* * USART1_TX -> PA9 , USART1_RX -> PA10 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING;// GPIO_Mode_IPU;//GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); USART_InitStructure.USART_BaudRate =2250000;// USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_Init(USART1, &USART_InitStructure); USART_Cmd(USART1, ENABLE); /* Configure the NVIC Preemption Priority Bits */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); /* Enable the USART1 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); USART_ClearFlag(USART1,USART_FLAG_TC); USART_ITConfig(USART1, USART_IT_TXE, DISABLE); //ENABLE DISABLE USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //DISABLE // USART_ITConfig(USART1, USART_IT_IDLE, DISABLE); //USART_IT_IDLE USART_IT_RXNE // USART_DMACmd(USART1,USART_DMAReq_Rx,DISABLE); //使能USART1的接收DMA请求 //ENABLE // USART_DMACmd(USART1,USART_DMAReq_Tx,DISABLE); //使能USART1的发送DMA请求 // Uart1DMAInit(); } void UART2RxTxISRHandler(void) { } /*************************************************************************** Uart3Init ****************************************************************************/ void Uart3Init(void) { } /******************************************************************************** *Uart3Send *串口3启动发送 *********************************************************************************/ void Uart3Send(void) { if(tx3_len==0 || tx3_len>UART3_TX_BUFFER_SIZE)return; // //启动新一轮发送 // g_ucUart2Sending=tx2_len; // tx2_ct=0; // //发送 // //USART_ClearITPendingBit(USART2, USART_IT_TXE); //清除中断标志 // USART_ITConfig(USART2, USART_IT_TXE, ENABLE); for(tx3_ct=0;tx3_ctLibraries->Small printf set to 'Yes') calls __io_putchar() */ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif /* __GNUC__ */ /** * @brief Retargets the C library printf function to the USART. * @param None * @retval None */ PUTCHAR_PROTOTYPE { /* Place your implementation of fputc here */ /* e.g. write a character to the USART */ USART_SendData(USART1, (uint8_t) ch); /* Loop until the end of transmission */ while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {} return ch; }