大家帮忙看看问题出在哪？初学，不懂！串口DMA接收再DMA发送问题

zqq张牙舞爪 · 发表于 2015-10-27 19:17:24

[mw_shl_code=c,true]#include "nvic.h" void NVIC_InitConfig(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); NVIC_InitStructure.NVIC_IRQChannel=DMA1_Channel4_IRQn; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1; NVIC_InitStructure.NVIC_IRQChannelSubPriority=1; NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel=DMA1_Channel5_IRQn; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; NVIC_Init(&NVIC_InitStructure); } ///////////////////////////////////////////////////////////////////////// #include "dma.h" extern u8 Buffer[16]; void DMA_InitConfig(void) { DMA_InitTypeDef DMA_InitStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); DMA_DeInit(DMA1_Channel4);//UART1 ?? DMA_DeInit(DMA1_Channel5);//UART1 ?? DMA_InitStructure.DMA_BufferSize=16; DMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralDST; DMA_InitStructure.DMA_M2M=DMA_M2M_Disable; DMA_InitStructure.DMA_MemoryBaseAddr=(u32)Buffer; DMA_InitStructure.DMA_MemoryDataSize=DMA_MemoryDataSize_Byte; DMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable; DMA_InitStructure.DMA_Mode=DMA_Mode_Normal ; DMA_InitStructure.DMA_PeripheralBaseAddr=(u32)&USART1->DR; DMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_Byte; DMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_Priority=DMA_Priority_Medium; DMA_Init(DMA1_Channel4, &DMA_InitStructure); DMA_InitStructure.DMA_BufferSize=16; DMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_M2M=DMA_M2M_Disable; DMA_InitStructure.DMA_MemoryBaseAddr=(u32)&USART1->DR; DMA_InitStructure.DMA_MemoryDataSize=DMA_MemoryDataSize_Byte; DMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable; DMA_InitStructure.DMA_Mode=DMA_Mode_Normal ; DMA_InitStructure.DMA_PeripheralBaseAddr=(u32)Buffer; DMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_Byte; DMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_Priority=DMA_Priority_High; DMA_Init(DMA1_Channel5, &DMA_InitStructure); DMA_ITConfig(DMA1_Channel4, DMA_IT_TC , ENABLE); DMA_ITConfig(DMA1_Channel5, DMA_IT_TC , ENABLE); DMA_Cmd(DMA1_Channel4,DISABLE); DMA_Cmd(DMA1_Channel5,ENABLE); } void DMA1_Channel4_IRQHandler(void) //?®??·????ê?????????? { DMA_Cmd(DMA1_Channel4,DISABLE); DMA_Cmd(DMA1_Channel5,DISABLE); DMA_SetCurrDataCounter(DMA1_Channel5,16); DMA_Cmd(DMA1_Channel5,ENABLE); DMA_ClearITPendingBit(DMA1_IT_TC4); } void DMA1_Channel5_IRQHandler(void)//?®???????ê?????????? { DMA_Cmd(DMA1_Channel5,DISABLE); DMA_Cmd(DMA1_Channel4,DISABLE); DMA_SetCurrDataCounter(DMA1_Channel4,16); DMA_Cmd(DMA1_Channel4,ENABLE); DMA_ClearITPendingBit(DMA1_IT_TC5); } ////////////////////////////////////////////////////// #include "uart.h" void UART_InitConfig(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1, ENABLE); GPIO_DeInit(GPIOA); GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOA,&GPIO_InitStructure); USART_InitStructure.USART_BaudRate=115200; USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx; USART_InitStructure.USART_Parity=USART_Parity_No; USART_InitStructure.USART_StopBits=USART_StopBits_1; USART_InitStructure.USART_WordLength=USART_WordLength_8b; USART_Init(USART1,&USART_InitStructure); USART_DMACmd(USART1,USART_DMAReq_Tx,ENABLE); USART_DMACmd(USART1,USART_DMAReq_Rx,ENABLE); USART_Cmd(USART1,ENABLE); } /////////////////////////////////////////////////////////////////// #include "stm32f10x.h" #include "dma.h" #include "nvic.h" #include "uart.h" u8 Buffer[16]; int main(void) { DMA_InitConfig(); NVIC_InitConfig(); UART_InitConfig(); while(1) { } } [/mw_shl_code]