stm32_DMA采集一个AD数据_并通过DMA向串口发送

这是以前学32的时候写的，那时候学了32之后感觉32真是太强大了，比51强的没影。关于dma网上有许多的资料，关于dma采集ad网上也有很多。亲们搜搜，这里只贴代码了，其实我也想详详细细地叙述一番，但是自己本身打字就慢，还有好多事情要做！代码是我亲自都在板子上测试过的，，当然粘贴/复制过去可能也不会尽如人意，知识这东西总是有许多道不清说不明的东西在里头，往往总是不经一番彻骨寒，哪得梅花扑鼻香。推荐一本书吧！这是野火出的。

这本书自从在图书馆借来就从来没有再放回去，总是在续借。像是在打广告了

#include <stm32f10x.h>
#include "ADC1.h"
#include "DMA1.h"
#include "USART1.h"
#include "time.h"
#include "stdio.h"extern uint32_t SendBuff;
float ADC_Received;
uint32_t ADC_Received1;
uint8_t ADC_Received2[11];//printf函数重新定向，方便在程序中使用
int fputc(int ch, FILE *f)
{  USART_SendData(USART1, (unsigned char) ch);while (!(USART1->SR & USART_FLAG_TXE)); return (ch); 
}void usart_putchar(uint8_t ch)
{USART_SendData(USART1,ch);while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
}int main()
{ADC1_Config();DMA_Config();USART1_Config();while(1){//      ADC_Received = (float)ADC_GetConversionValue(ADC1)*3.3/4069;
//      ADC_Received1 = ADC_Received * 1000000000;
     ADC_Received = (float)SendBuff*3.3/4069;ADC_Received1 = ADC_Received * 1000000000;ADC_Received2[0]=(ADC_Received1/1000000000 + 0x30);//usart_putchar(0x2e); ADC_Received2[1]=(ADC_Received1%1000000000/100000000 + 0x30);ADC_Received2[2]=(ADC_Received1%1000000000%100000000/10000000 + 0x30);ADC_Received2[3]=(ADC_Received1%1000000000%100000000%10000000/1000000 + 0x30);ADC_Received2[4]=(ADC_Received1%1000000000%100000000%10000000%1000000/100000 + 0x30);ADC_Received2[5]=(ADC_Received1%1000000000%100000000%10000000%1000000%100000/10000 + 0x30); ADC_Received2[6]=(ADC_Received1%1000000000%100000000%10000000%1000000%100000%10000/1000 + 0x30); ADC_Received2[7]=(ADC_Received1%1000000000%100000000%10000000%1000000%100000%10000%1000/100 + 0x30); ADC_Received2[8]=(ADC_Received1%1000000000%100000000%10000000%1000000%100000%10000%1000%100/10 + 0x30); ADC_Received2[9]=(ADC_Received1%10 + 0x30);ADC_Received2[10]=0x0d;USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
//      delay_ms(1000);
//      USART_DMACmd(USART1, USART_DMAReq_Tx, DISABLE);
//      delay_ms(1000);
//     ADC_Received = (float) SendBuff/4069*3.3;//      ADC_Received = (u16)ADC1 -> DR;
//      ADC_Received = (float)ADC_Received/4069*3.3;
//      printf("\r\n v = %f V \r\n",ADC_Received);
//        while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//      usart_putchar('\r'); 
//      usart_putchar('\n'); //      usart_putchar(0x0d); 
//      usart_putchar(0x0a); //      printf("\r");
//      printf("\n");
//      printf("\r\n V = %fv\r\n",ADC_Received);
    }
}
#include "ADC1.h"void ADC1_Config(void)
{ADC_InitTypeDef ADC_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);ADC1_Gpio_Config();ADC_DeInit(ADC1); //复位 ADC1,将外设 ADC1 的全部寄存器重设为缺省值// ADC1 配置ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC1工作在独立模式ADC_InitStructure.ADC_ScanConvMode = ENABLE;//使能扫描ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;;//ADC转换工作在连续模式ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//由软件控制转换ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//转换数据右对齐ADC_InitStructure.ADC_NbrOfChannel = 1;//转换通道为通道1ADC_Init(ADC1, &ADC_InitStructure); //初始化ADC //ADC1选择信道0,顺续等级1,采样时间239.5个周期ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_28Cycles5);    //打开ADC1
  ADC_Cmd(ADC1, ENABLE);//重置ADC1校准寄存器 
  ADC_ResetCalibration(ADC1); //等待ADC1校准重置完成while(ADC_GetResetCalibrationStatus(ADC1));  //开始ADC1校准
  ADC_StartCalibration(ADC1); //等待ADC1校准完成while(ADC_GetCalibrationStatus(ADC1)); //使能ADC1软件开始转换
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);//配置ADC时钟=PCLK2 1/6    12MHz
  RCC_ADCCLKConfig(RCC_PCLK2_Div6); //使能ADC1模块DMA
  ADC_DMACmd(ADC1, ENABLE); 
}static void ADC1_Gpio_Config(void)
{GPIO_InitTypeDef GPIO_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;GPIO_Init(GPIOA , &GPIO_InitStructure);}
#include "DMA1.h"/* 其他函数里 USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);     */
uint32_t  SendBuff;
extern float ADC_Received;
extern uint8_t ADC_Received2[11];
//描述  ：DMA 串口的初始化配置void DMA_Config(void)
{//初始化结构体
    DMA_InitTypeDef DMA_InitStructure;//开启DMA时钟
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);    //配置DMA中断
      NVIC_Config();                   //设置DMA源：地址
     DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1 -> DR;      //*内存地址(要传输的变量的指针)DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&SendBuff;//外设作为数据传输的来源DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;    //指定 DMA 通道的 DMA 缓存的大小，单位为数据单位。DMA_InitStructure.DMA_BufferSize = 1;//*外设地址不增        DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //*内存地址不增DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;    //*外设数据单位数据宽度为 16 位DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//*内存数据单位数据宽度为 16 位DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;     //*DMA模式：一次传输/循环
//         DMA_Mode_Circular 工作在循环缓存模式
//    DMA_Mode_Normal 工作在正常缓存模式
//     DMA_InitStructure.DMA_Mode = DMA_Mode_Normal ;    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;        //*优先级：高DMA_InitStructure.DMA_Priority = DMA_Priority_High;  //*禁止内存到内存的传输    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//*配置DMA1的1通道           DMA_Init(DMA1_Channel1, &DMA_InitStructure); //使能DMA
      DMA_Cmd (DMA1_Channel1,ENABLE);//配置DMA发送完成后产生中断        
//       DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE); //****************************************************///
//****************************************************///
//****************************************************/////设置DMA源：地址DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1 -> DR;      //*内存地址(要传输的变量的指针)DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_Received2;//外设作为数据传输的目的地DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;    //指定 DMA 通道的 DMA 缓存的大小，单位为数据单位。DMA_InitStructure.DMA_BufferSize = 11;//*外设地址不增        DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //*内存地址不增DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;    //*外设数据单位数据宽度为 16 位DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//*内存数据单位数据宽度为 16 位DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;     //*DMA模式：一次传输/循环
//         DMA_Mode_Circular 工作在循环缓存模式
//    DMA_Mode_Normal 工作在正常缓存模式
//     DMA_InitStructure.DMA_Mode = DMA_Mode_Normal ;    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;        //*优先级：中DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;  //*禁止内存到内存的传输    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//*配置DMA1的4通道           DMA_Init(DMA1_Channel4, &DMA_InitStructure); //使能DMA
      DMA_Cmd (DMA1_Channel4,ENABLE);//配置DMA发送完成后产生中断        
//       DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);  
}
#include "time.h"/****************
延时多少个 1/72 us
****************/
void delay_1_72us(uint32_t time)
{SysTick -> LOAD = (u32) time; //定时器赋初值       
    SysTick -> CTRL = 0x00000005; //选择72MHz 并 打开定时器while(!(SysTick -> CTRL & 0x00010000));//等待计数到零
SysTick -> CTRL = 0x00000004;//关闭定时器
    
}void delay_ms(u32 time)
{while(time -- ){delay_1_72us(72000);}}
#include "USART1.h"//描述  ：USART1 GPIO 配置,工作模式配置。115200 8-N-1void USART1_Config(void)
{GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InitStructure;// 打开  USART1 的时钟RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);// USART1 Tx (PA_9) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStructure);    // USART1 Tx (PA_10) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入GPIO_Init(GPIOA, &GPIO_InitStructure);/* USART1 mode config */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); 
}