STM32 UART DMA 收发数据

#include "Hal_Dma_Usart/hal_usart_dma.h" #include "liiot_net_device.h" #include "sys_timer.h" #include <string.h> static uint32_t (*hal_usart_dma_get_sys_tick)(void); typedef struct { USART_TypeDef *usart_port; DMA_Channel_TypeDef *usart_send_dma_chnl; DMA_Channel_TypeDef *usart_recv_dma_chnl; }_usart_dma_chnl; static _usart_dma_chnl usart_dma_chnl[UART_PORT_INDEX] = { USART1, DMA1_Channel4, DMA1_Channel5, USART2, DMA1_Channel7, DMA1_Channel6, USART3, DMA1_Channel2, DMA1_Channel2, }; /* UART 数据结构 */ typedef struct { #if LIIOT_CONV_HOST_MAX liiot_convergence_host_t usart_host_net; #endif _usart_dma_chnl *usart_chnl; bool usart_tx_flg; bool usart_rx_flg; uint8_t usart_tx[USART_DMA_BUF_SIZE]; uint16_t usart_tx_len; uint8_t usart_rx[USART_DMA_BUF_SIZE]; uint16_t usart_rx_len; }_usart_para; static _usart_para usart_para[UART_PORT_INDEX]; #if defined (Open_UART1_DMA) /*************************************************************** * UART1_TX PA9 * UART1_RX PA10 ****************************************************************/ #define USART1_GPIO_PORT GPIOA #define USART1_RxPin GPIO_Pin_10 #define USART1_TxPin GPIO_Pin_9 #endif #if defined (Open_UART2_DMA) /*************************************************************** * UART2_TX PA2 * UART2_RX PA3 ****************************************************************/ #define USART2_GPIO_PORT GPIOA #define USART2_RxPin GPIO_Pin_3 #define USART2_TxPin GPIO_Pin_2 #endif #if defined (Open_UART3_DMA) /*************************************************************** * UART3_TX PB10 * UART3_RX PB11 ****************************************************************/ #define USART3_GPIO_PORT GPIOB #define USART3_RxPin GPIO_Pin_11 #define USART3_TxPin GPIO_Pin_10 #endif /********************************************************************* * @brief UART GPIO configuration * @param None * @retval None * @date 20141205 ***********************************************************************/ static void hal_usart_dma_GPIO_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; #if defined (Open_UART1_DMA) RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); GPIO_InitStructure.GPIO_Pin = USART1_TxPin; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(USART1_GPIO_PORT, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = USART1_RxPin; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(USART1_GPIO_PORT, &GPIO_InitStructure); #endif #if defined (Open_UART2_DMA) RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); GPIO_InitStructure.GPIO_Pin = USART2_TxPin; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(USART2_GPIO_PORT, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = USART2_RxPin; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(USART2_GPIO_PORT, &GPIO_InitStructure); #endif #if defined (Open_UART3_DMA) RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); GPIO_InitStructure.GPIO_Pin = USART3_TxPin; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(USART3_GPIO_PORT, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = USART3_RxPin; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(USART3_GPIO_PORT, &GPIO_InitStructure); #endif } /********************************************************************* * @brief UART configuration * @param None * @retval None * @date 20141205 ***********************************************************************/ static void hal_usart_dma_usart_Config(void) { USART_InitTypeDef USART_InitStructure; #if defined (Open_UART1_DMA) /* UART1 connect to HC-02 */ /* HC-02: baud rate is 57600, 8-N-1 */ USART_InitStructure.USART_BaudRate = 57600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_Init(USART1, &USART_InitStructure); /* 采用空闲中断 */ USART_ITConfig(USART1, USART_IT_IDLE, ENABLE); /* 使能串口发送完成中断 */ USART_ITConfig(USART1, USART_IT_TC, ENABLE); USART_DMACmd(USART1, USART_DMAReq_Rx | USART_DMAReq_Tx, ENABLE); /* enable USART1 */ USART_Cmd(USART1, ENABLE); /* CPU的小缺陷：串口配置好，如果直接Send，则第1个字节发送不出去 如下语句解决第1个字节无法正确发送出去的问题 */ USART_ClearFlag(USART1, USART_FLAG_TC); /* 清发送完成标志，Transmission Complete flag */ #endif #if defined (Open_UART2_DMA) /* UART2 connect to CP2102 */ /* CP2102: baud rate is 57600, 8-N-1 */ USART_InitStructure.USART_BaudRate = 57600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_Init(USART2, &USART_InitStructure); /* 采用空闲中断 */ USART_ITConfig(USART2, USART_IT_IDLE, ENABLE); /* 使能串口发送完成中断 */ USART_ITConfig(USART2, USART_IT_TC, ENABLE); USART_DMACmd(USART2, USART_DMAReq_Rx | USART_DMAReq_Tx, ENABLE); /* enable USART2 */ USART_Cmd(USART2, ENABLE); /* CPU的小缺陷：串口配置好，如果直接Send，则第1个字节发送不出去 如下语句解决第1个字节无法正确发送出去的问题 */ USART_ClearFlag(USART2, USART_FLAG_TC); /* 清发送完成标志，Transmission Complete flag */ #endif #if defined (Open_UART3_DMA) USART_InitStructure.USART_BaudRate = 57600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_Init(USART3, &USART_InitStructure); /* 采用空闲中断 */ USART_ITConfig(USART3, USART_IT_IDLE, ENABLE); /* 使能串口发送完成中断 */ USART_ITConfig(USART3, USART_IT_TC, ENABLE); USART_DMACmd(USART3, USART_DMAReq_Rx | USART_DMAReq_Tx, ENABLE); /* enable USART3 */ USART_Cmd(USART3, ENABLE); /* CPU的小缺陷：串口配置好，如果直接Send，则第1个字节发送不出去 如下语句解决第1个字节无法正确发送出去的问题 */ USART_ClearFlag(USART3, USART_FLAG_TC); /* 清发送完成标志，Transmission Complete flag */ #endif } /********************************************************************* * @brief Initialize the NCIC * @param None * @retval None * @date 20141205 ***********************************************************************/ static void hal_usart_dma_NVIC_Config(void)