STM32无法进入DMA发送完成中断
STM32 通过串口1接收上位机8个字节的数据 通过DMA发送到缓存
程序做好相关配置，通过调试助手下发8字节数据 程序一直无法进入DMA发送完成中断
请问是配置方面有什么问题吗 下面贴出主要的配置程序
//配置
void NVIC_Config(void){
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
//NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannel=DMA1_Channel5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART1_Config(void){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 115200;
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(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_DMACmd(USART1,USART_DMAReq_Rx,ENABLE);
//USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
////USART_GetFlagStatus(USART1,USART_FLAG_TC);
}
void USART1_DMA_Config(void)
{
extern uint8_t RECEBuf;
extern uint8_t RECEBuf_Size;
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
DMA_DeInit(DMA1_Channel5);
DMA_InitStructure.DMA_PeripheralBaseAddr=0x40013804;
DMA_InitStructure.DMA_MemoryBaseAddr=(uint8_t)RECEBuf;
DMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize=RECEBuf_Size;
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_Normal;
DMA_InitStructure.DMA_Priority=DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_M2M=DMA_M2M_Disable;
DMA_Init(DMA1_Channel5,&DMA_InitStructure);
DMA_Cmd(DMA1_Channel5,ENABLE);
DMA_ITConfig(DMA1_Channel5,DMA_IT_TC,ENABLE);
}
//中断处理
void DMA1_Channel5_IRQHandler(void)
{
printf("c");
if(DMA_GetFlagStatus(DMA1_IT_TC5))
{
// a=0;
uint8_t data;
DMA_ClearITPendingBit(DMA1_IT_GL5);
data=DMA_GetCurrDataCounter(DMA1_Channel5);
DMA_Cmd(DMA1_Channel5,DISABLE);
DMA_SetCurrDataCounter(DMA1_Channel5,8);
DMA_Cmd(DMA1_Channel5,ENABLE);
printf("%d",data);
printf("%d",RECEBuf[0]);
}
}
软件对了暂时没有看到有什么问题。
最好提供一下，在没有使用DMA时，USART1有没有能正常接收到数据，以证明硬件连接是否有问题。
打开了传输错误中断位测试，发现单片机一直进入传输错误中断
这种问题只能分步去检测，首先确保USART1能正常收发，再加入DMA。
打开了传输错误中断位测试，发现单片机一直进入传输错误中断
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stdio.h"
/* Private define ------------------------------------------------------------*/
#define USART1_DR_Base 0x40013804
#define SRC_USART1_DR (&(USART1->DR))
/* Private variables ---------------------------------------------------------*/
#define SENDBUFF_SIZE 16
vu8 SendBuff[SENDBUFF_SIZE];
void DMA_Configuration(void);
void USART1_Configuration(void);
//////////////////////////////////////////////////////////////////
//加入以下代码,支持printf函数,而不需要选择use MicroLIB
#if 1
#pragma import(__use_no_semihosting)
//标准库需要的支持函数
struct __FILE
{
int handle;
};
FILE __stdout;
//定义_sys_exit()以避免使用半主机模式
_sys_exit(int x)
{
x = x;
}
//重定义fputc函数
int fputc(int ch, FILE *f)
{
while((USART1->SR&0X40)==0);//循环发送,直到发送完毕
USART1->DR = (u8) ch;
return ch;
}
#endif
int main(void)
{
SystemInit();
USART1_Configuration();
printf("USART1!\r\n");
DMA_Configuration();
while (1)
{
}
}
// Description : NUSART1设置
void USART1_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1, ENABLE);
//USART1_TX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//USART1_RX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 115200;
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_Tx | USART_Mode_Rx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //使能DMA传输
DMA_DeInit(DMA1_Channel5);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&(USART1->DR));
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SendBuff;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //外设作源头//外设是作为数据传输的目的地还是来源
DMA_InitStructure.DMA_BufferSize = 16; //DMA缓存的大小 单位在下边设定
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设地址寄存器不递增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址递增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; //外设字节为单位
DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte; //内存字节为单位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循环缓存模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //4优先级之一的(高优先) VeryHigh/High/Medium/Low
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //非内存到内存
DMA_Init(DMA1_Channel5, &DMA_InitStructure); //根据DMA_InitStruct中指定的参数初始化DMA的通道1寄存器
DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE); //DMA5传输完成中断
USART_DMACmd(USART1,USART_DMAReq_Rx,ENABLE); //使能USART1的接收DMA请求
DMA_Cmd(DMA1_Channel5, ENABLE);
DMA_ClearFlag(DMA1_FLAG_TC5);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void DMA1_Channel5_IRQHandler(void)
{
u8 end;
printf("Start DMA transmission!\r\n");
if(DMA_GetITStatus(DMA1_IT_TC5))
{
end = DMA_GetCurrDataCounter(DMA1_Channel5);
DMA_ClearITPendingBit(DMA1_IT_GL5);///* 清中断源
DMA_ClearFlag(DMA1_FLAG_TC5);
//printf("Start DMA transmission!\r\n");
printf("%d\r\n", end);
printf("%s\r\n", SendBuff);
}
}
如果有解决，请点采纳！谢谢！