为什么我的串口DMA存不进去，急求谢谢帮帮忙
void uart_init(){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
DMA_InitTypeDefDMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; //
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB,&GPIO_InitStructure);ˉ
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB,&GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
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(USART3, &USART_InitStructure);
DMA_DeInit(DMA1_Stream1);
/* ÅäÖÃ DMA Stream */
DMA_InitStructure.DMA_Channel = DMA_Channel_4;
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&USART3->DR);
DMA_InitStructure.DMA_Memory0BaseAddr = (u32)DATA_SAVE;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream1, &DMA_InitStructure);
DMA_Cmd(DMA1_Stream1,ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_DMACmd(USART3, USART_DMAReq_Rx, ENABLE);
DMA_Cmd(DMA1_Stream1,ENABLE);
USART_Cmd(USART3, ENABLE);
USART_ClearFlag(USART3, USART_FLAG_RXNE);
void DMA1_Stream1_IRQHandler(void)
{
DMA_Cmd(DMA1_Stream1,DISABLE);
DMA_ClearFlag(DMA1_Stream1,DMA_FLAG_TCIF1);
USART_ClearFlag(USART3, USART_FLAG_TC);
TIM_SetCompare1(TIM14,DATA_SAVE);
DMA_Cmd(DMA1_Stream1,ENABLE);
}
是哪里有错啊啊啊啊跪求 建议楼主先看官方例程，另AFIO时钟是否也要开启？ 我原来配置的是只发送一次 然后改变了发送的数据 再重新的发送好像是这样的差不多一年多了不太记得了 是能够正常的运行的，网上的资料非常多你可以借鉴一下！！！ andypanfan 发表于 2017-1-12 09:12
我原来配置的是只发送一次 然后改变了发送的数据 再重新的发送好像是这样的差不多一年多了不太记 ...
我串口收不进去，输入的不是我发送的数据，很纠结这个我串口哪里弄错了，求教
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