[问答]

stm32 usart DMA 双缓冲中断进不去的解决办法？

2834 STM32

问答对人有帮助，内容完整，我也想知道答案 0 #include "FreeRTOS.h" #include "STM32f4xx.h" #include "stm32f4xx_dma.h" #include "queue.h" #include "task.h" #include "zigbee_task.h" #include "bsp_zigbee.h" unsigned char gcav_Usart1DmaRxBuffer[2][1024]; unsigned char gcav_Usart1DmaTxBuffer[2][1024] = {{1},{'+','+','+',}}; void zigbee_usart1_init() { GPIO_InitTypeDef GPIO_InitStruct; USART_InitTypeDef UART_InitStruct; NVIC_InitTypeDef NVIC_InitStruct; DMA_InitTypeDef DMA_InitStruct; /浣胯兘GPIOB&USART&DMA2/ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE); /GPIO閰嶇疆/ /澶嶇敤GPIO/ GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_USART1); GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_USART1); GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6 \| GPIO_Pin_7; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOB,&GPIO_InitStruct); USART_DeInit(USART1); UART_InitStruct.USART_BaudRate = 115200; UART_InitStruct.USART_StopBits = USART_StopBits_1; UART_InitStruct.USART_Parity = USART_Parity_No; UART_InitStruct.USART_WordLength = USART_WordLength_8b; UART_InitStruct.USART_Mode = USART_Mode_Rx \| USART_Mode_Tx; UART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_Init(USART1, &UART_InitStruct); /涓柇閰嶇疆/ NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 5; NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0; NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStruct); /涓柇浣胯兘/ USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); /涓插彛浣胯兘/ USART_Cmd(USART1, ENABLE); /RX/ /鍏抽棴DMA閫氶亾/ DMA_DeInit(DMA2_Stream5); while(DMA_GetCmdStatus(DMA2_Stream5) != DISABLE); DMA_InitStruct.DMA_Channel = DMA_Channel_4; DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&USART1->DR; DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)&gcav_Usart1DmaRxBuffer[0]; DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory; DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; DMA_InitStruct.DMA_BufferSize = 1024; DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStruct.DMA_Mode = DMA_Mode_Circular; DMA_InitStruct.DMA_Priority = DMA_Priority_VeryHigh; DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull; DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_DoubleBufferModeConfig(DMA2_Stream5, (uint32_t)&gcav_Usart1DmaRxBuffer[1], DMA_Memory_0); DMA_DoubleBufferModeCmd(DMA2_Stream5, ENABLE); DMA_Init(DMA2_Stream5, &DMA_InitStruct); /涓柇浣胯兘/ // DMA_ITConfig(DMA2_Stream5, DMA_IT_TC, ENABLE); /TX/ DMA_DeInit(DMA2_Stream7); while(DMA_GetCmdStatus(DMA2_Stream7) != DISABLE); DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)&gcav_Usart1DmaTxBuffer[0]; DMA_InitStruct.DMA_DIR = DMA_DIR_MemoryToPeripheral; DMA_DoubleBufferModeConfig(DMA2_Stream7, (uint32_t)&gcav_Usart1DmaTxBuffer[1], DMA_Memory_0); DMA_DoubleBufferModeCmd(DMA2_Stream7, ENABLE); DMA_Init(DMA2_Stream7, &DMA_InitStruct); /DMA TX/ NVIC_InitStruct.NVIC_IRQChannel = DMA2_Stream7_IRQn; NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2; NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStruct); /涓柇浣胯兘/ DMA_ITConfig(DMA2_Stream7, DMA_IT_TC, ENABLE); /DMA浣胯兘/ DMA_Cmd(DMA2_Stream5, ENABLE); USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE); USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE); } / USART1 中断函数 / void USART1_IRQHandler(void) { zigbee_msg_st ltv_Msg; BaseType_t ltv_HigherPriorityTaskWoken; if(USART_GetITStatus(USART1, USART_IT_IDLE) != RESET){ //关闭，防干扰 DMA_Cmd(DMA2_Stream5, DISABLE); /获取当前正在使用的buff/ ltv_Msg.mcv_RxIndex = DMA_GetCurrentMemoryTarget(DMA2_Stream5); ltv_Msg.mcv_TxIndex = DMA_GetCurrentMemoryTarget(DMA2_Stream7); /切换buff/ DMA_DoubleBufferModeCmd(DMA2_Stream5, DISABLE); if(!ltv_Msg.mcv_RxIndex) { DMA_DoubleBufferModeConfig(DMA2_Stream5, (uint32_t)&gcav_Usart1DmaRxBuffer[0], DMA_Memory_1); } else { DMA_DoubleBufferModeConfig(DMA2_Stream5, (uint32_t)&gcav_Usart1DmaRxBuffer[1], DMA_Memory_0); } DMA_DoubleBufferModeCmd(DMA2_Stream5, ENABLE); ltv_Msg.msv_RcvLen=1024-DMA_GetCurrDataCounter(DMA2_Stream5); /重新定义长度下次接收/ DMA_SetCurrDataCounter(DMA2_Stream5, 1024); DMA_Cmd(DMA2_Stream5, ENABLE); USART1->SR; USART1->DR; /Send Msg/ xQueueSendFromISR(gtv_ZigbeeTaskMsgQueueHandle, } } /** * @brief DMA1 Usart1 Tx 涓柇鍑芥暟 * @param None * @retval None / void DMA2_Stream7_IRQHandler(void) { if(DMA_GetITStatus(DMA2_Stream7, DMA_IT_TCIF7) != RESET) { DMA_Cmd(DMA2_Stream7, DISABLE); DMA_ClearFlag(DMA2_Stream7, DMA_IT_TCIF7); } } /* * @brief USART1 鏁版嵁鍙戦 0
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