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- #include "usart.h"
- uint8_t UART6_RX_BUF[BUFF_SIZE];
- uint8_t UART6_RX_STAT=0;
- uint32_t UART6_RX_NUM = 0;
- /**
- * @brief DEBUG_USART GPIO 配置,工作模式配置。115200 8-N-1 ,中断接收模式
- * @param 无
- * @retval 无
- */
- void DEBUG_USART_Config(void)
- {
- USART_InitTypeDef USART_InitStruct;
- GPIO_InitTypeDef GPIO_InitStruct;
- // Enable USART6 clock
- RCC_APB2PeriphClockCmd(DEBUG_USART_CLK, ENABLE);
- // Enable GPIOC clock
- RCC_AHB1PeriphClockCmd(DEBUG_USART_RX_GPIO_CLK, ENABLE);
- // Configure USART6 pins
- GPIO_InitStruct.GPIO_Pin = DEBUG_USART_RX_PIN | DEBUG_USART_TX_PIN; // USART6_TX (PC6) and USART6_RX (PC7)
- GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
- GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
- GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(DEBUG_USART_TX_GPIO_PORT, &GPIO_InitStruct);
- // Connect USART6 pins to AF8
- GPIO_PinAFConfig(DEBUG_USART_RX_GPIO_PORT, DEBUG_USART_RX_SOURCE, DEBUG_USART_RX_AF);
- GPIO_PinAFConfig(DEBUG_USART_TX_GPIO_PORT, DEBUG_USART_TX_SOURCE, DEBUG_USART_TX_AF);
- // Configure USART6
- USART_InitStruct.USART_BaudRate = DEBUG_USART_BAUDRATE;
- USART_InitStruct.USART_WordLength = USART_WordLength_8b;
- USART_InitStruct.USART_StopBits = USART_StopBits_1;
- USART_InitStruct.USART_Parity = USART_Parity_No;
- USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
- USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_Init(DEBUG_USART, &USART_InitStruct);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = DEBUG_USART_IRQ; //IRQ通道
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //主优先级
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //从优先级
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能通道
- NVIC_Init(&NVIC_InitStructure);
-
- // Enable USART6
- USART_ITConfig(DEBUG_USART, USART_IT_IDLE, ENABLE); //开启空闲中断
- DMA_Cmd(DEBUG_USART_DMA_STREAM, ENABLE); //使能DMA接收
- USART_Cmd(DEBUG_USART, ENABLE);
- USART_ClearFlag(DEBUG_USART, USART_FLAG_TC);
-
- }
- void DEBUG_USART_IRQHandler(void)
- {
- uint16_t clear;
- if(USART_GetITStatus(DEBUG_USART,USART_IT_IDLE)!=RESET)
- {
- //清除空闲中断
- clear=USART6->SR;
- clear=USART6->DR;
- //关闭DMA
- DMA_Cmd(DEBUG_USART_DMA_STREAM,DISABLE);
- UART6_RX_NUM=BUFF_SIZE-DMA_GetCurrDataCounter(DEBUG_USART_DMA_STREAM);
- //清除DMA中断
- DMA_ClearFlag(DEBUG_USART_DMA_STREAM,DMA_IT_TCIF1);
- DMA_Cmd(DEBUG_USART_DMA_STREAM, ENABLE);
- //接收状态置位
- UART6_RX_STAT=1;
-
- }
- }
- /**
- * @brief USART1 TX DMA 配置,内存到外设(USART1->DR)
- * @param 无
- * @retval 无
- */
- void USART_DMA_Config(void)
- {
- // 使能串口和DMA时钟
- RCC_APB2PeriphClockCmd(DEBUG_USART_CLK, ENABLE);
- RCC_AHB1PeriphClockCmd(DEBUG_USART_DMA_CLK, ENABLE);
-
- DMA_InitTypeDef DMA_InitStructure;
-
- DMA_InitStructure.DMA_Channel = DEBUG_USART_DMA_CHANNEL;
- /*设置DMA源:串口数据寄存器地址*/
- DMA_InitStructure.DMA_PeripheralBaseAddr = DEBUG_USART_DR_BASE;
- /*内存地址(要传输的变量的指针)*/
- DMA_InitStructure.DMA_Memory0BaseAddr = (u32)UART6_RX_BUF;
- /*方向:从外设到内存*/
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
- /*传输大小DMA_BufferSize=SENDBUFF_SIZE*/
- DMA_InitStructure.DMA_BufferSize = BUFF_SIZE;
- /*外设地址不增*/
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
- /*内存地址自增*/
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
- /*外设数据单位*/
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
- /*内存数据单位 8bit*/
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
- /*DMA模式:不断循环*/
- DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
- /*优先级:中*/
- DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
- /*禁用FIFO*/
- DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
- DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
- /*存储器突发传输 16个节拍*/
- DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
- /*外设突发传输 1个节拍*/
- DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
- /*配置DMA2的数据流*/
- DMA_Init(DEBUG_USART_DMA_STREAM, &DMA_InitStructure);
- USART_DMACmd(DEBUG_USART,USART_DMAReq_Rx,ENABLE);
- DMA_ITConfig(DEBUG_USART_DMA_STREAM,DMA_IT_TC,ENABLE);
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream5_IRQn ;//串口1发送中断通道
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //抢占优先级
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
- NVIC_Init(&NVIC_InitStructure);
-
- }
- void DMA2_Stream5_IRQHandler() {
- if (DMA_GetITStatus(DMA2_Stream1, DMA_IT_TCIF1))
- {
- DMA_ClearITPendingBit(DMA2_Stream1, DMA_IT_TCIF1);
- }
- }
- /*
- 485串口在未配置情况下,初始化的参数
- */
- void USART_485_config()
- {
- USART_InitTypeDef USART_InitStruct;
- GPIO_InitTypeDef GPIO_InitStruct;
- RCC_AHB1PeriphClockCmd(USART_485_CLK, ENABLE);
- RCC_AHB1PeriphClockCmd(USART_485_RX_GPIO_CLK, ENABLE);
- GPIO_InitStruct.GPIO_Pin = USART_485_RX_PIN | USART_485_TX_PIN;
- GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
- GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
- GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOC, &GPIO_InitStruct);
- GPIO_PinAFConfig(USART_485_RX_GPIO_PORT, USART_485_RX_SOURCE, USART_485_RX_AF);
- GPIO_PinAFConfig(USART_485_TX_GPIO_PORT, USART_485_TX_SOURCE, USART_485_TX_AF);
- USART_InitStruct.USART_BaudRate = USART_485_BAUDRATE;
- USART_InitStruct.USART_WordLength = USART_WordLength_8b;
- USART_InitStruct.USART_StopBits = USART_StopBits_1;
- USART_InitStruct.USART_Parity = USART_Parity_No;
- USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
- USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_Init(USART_485, &USART_InitStruct);
- USART_Cmd(USART_485, ENABLE);
- USART_ITConfig(USART_485,USART_IT_RXNE,ENABLE);
- USART_ITConfig(USART_485,USART_IT_IDLE,ENABLE);
- }
- /*
- * 函数名:void Config_485_Port(uint32_t baudrate, uint8_t databits, uint8_t stopbits, uint8_t parity, uint8_t flowcontrol)
- * 输入参数:baudrate,databits,stopbits,parity,flowcontol 串口的配置参数
- * 输出参数:无
- * 返回值:无
- * 函数作用:根据输入参数进行配置485串口参数
- */
- void Config_485_Port(uint32_t baudrate, uint8_t databits, uint8_t stopbits, uint8_t parity, uint8_t flowcontrol)
- {
- uint8_t wordLength;
- if(parity!=0)
- {
- wordLength=databits+1;
- }else wordLength=databits;
- USART_InitTypeDef USART_InitStruct;
- GPIO_InitTypeDef GPIO_InitStruct;
- RCC_AHB1PeriphClockCmd(USART_485_CLK, ENABLE);
- RCC_AHB1PeriphClockCmd(USART_485_RX_GPIO_CLK, ENABLE);
- GPIO_InitStruct.GPIO_Pin = USART_485_RX_PIN | USART_485_TX_PIN;
- GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
- GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
- GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOC, &GPIO_InitStruct);
- GPIO_PinAFConfig(USART_485_RX_GPIO_PORT, USART_485_RX_SOURCE, USART_485_RX_AF);
- GPIO_PinAFConfig(USART_485_TX_GPIO_PORT, USART_485_TX_SOURCE, USART_485_TX_AF);
- USART_InitStruct.USART_BaudRate = baudrate;
- USART_InitStruct.USART_WordLength = (wordLength== 9) ? USART_WordLength_9b : USART_WordLength_8b;
- USART_InitStruct.USART_StopBits = USART_StopBits_1;
- USART_InitStruct.USART_Parity = USART_Parity_No;
- USART_InitStruct.USART_Parity =(parity == 1) ? (USART_Parity_Odd) : (parity == 2 ? USART_Parity_Even : USART_Parity_No);
-
- USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
- USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_Init(USART_485, &USART_InitStruct);
- USART_Cmd(USART_485, ENABLE);
- USART_ITConfig(USART_485,USART_IT_RXNE,ENABLE);
- USART_ITConfig(USART_485,USART_IT_IDLE,ENABLE);
- }
- /*
- 232串口配置
- */
- void USART_232_config()
- {
- USART_InitTypeDef USART_InitStruct;
- GPIO_InitTypeDef GPIO_InitStruct;
-
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
-
- GPIO_PinAFConfig(USART_232_RX_GPIO_PORT, USART_232_RX_SOURCE, USART_232_RX_AF);
- GPIO_PinAFConfig(USART_232_TX_GPIO_PORT, USART_232_TX_SOURCE, USART_232_TX_AF);
-
-
- GPIO_InitStruct.GPIO_Pin = USART_232_RX_PIN | USART_232_TX_PIN;
- GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
- GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
- GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStruct);
-
- USART_InitStruct.USART_BaudRate = USART_232_BAUDRATE;
- USART_InitStruct.USART_WordLength = USART_WordLength_8b;
- USART_InitStruct.USART_StopBits = USART_StopBits_1;
- USART_InitStruct.USART_Parity = USART_Parity_No;
- USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
- USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_Init(USART_232, &USART_InitStruct);
-
- USART_Cmd(USART_232, ENABLE);
-
- USART_ClearFlag(USART1, USART_FLAG_TC);
-
- USART_ITConfig(USART_232,USART_IT_RXNE,ENABLE);
- USART_ITConfig(USART_232,USART_IT_IDLE,ENABLE);
-
- // 配置USART1接收中断优先级
- NVIC_InitTypeDef NVIC_InitStruct;
- NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
- NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
- NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
- NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
- NVIC_Init(&NVIC_InitStruct);
-
-
- }
- /***************** 发送一个字符 **********************/
- void Usart_SendByte( USART_TypeDef * pUSARTx, uint8_t ch)
- {
- /* 发送一个字节数据到USART */
- USART_SendData(pUSARTx,ch);
-
- /* 等待发送数据寄存器为空 */
- while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
- }
- /***************** 发送字符串 **********************/
- void Usart_SendString( USART_TypeDef * pUSARTx, char *str)
- {
- unsigned int k=0;
- do
- {
- Usart_SendByte( pUSARTx, *(str + k) );
- k++;
- } while(*(str + k)!='\0');
-
- /* 等待发送完成 */
- while(USART_GetFlagStatus(pUSARTx,USART_FLAG_TC)==RESET)
- {}
- }
- /***************** 发送一个16位数 **********************/
- void Usart_SendHalfWord( USART_TypeDef * pUSARTx, uint16_t ch)
- {
- uint8_t temp_h, temp_l;
-
- /* 取出高八位 */
- temp_h = (ch&0XFF00)>>8;
- /* 取出低八位 */
- temp_l = ch&0XFF;
-
- /* 发送高八位 */
- USART_SendData(pUSARTx,temp_h);
- while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
-
- /* 发送低八位 */
- USART_SendData(pUSARTx,temp_l);
- while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
- }
- /*********************************************END OF FILE**********************/
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