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- 2016-6-10
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小弟使用STM32F103VC对PA0~PA4进行ADC转换并使用DMA，但却没有数据输出，求高手指点。附件是整个工程，代码如下：
#include "stm32f10x.h"
#include "stdio.h"
#include "led.h"
#include "delay.h"
#define M 5 //¶ÔÓ¦5¸öADCͨµÀ
#define N 10 //ÿ¸öͨµÀת»»50´Î
/*****¶¨ÒåADC1ÍâÉèÊý¾Ý¼Ä´æÆ÷µØÖ·*********/
#define ADC1_DR_Address ((uint32_t)0x4001244C)
uint16_t ADCConvertedValue[N][M]; //ÁÙʱ´æ·ÅADת»»µÄÊ®½øÖƵçѹ
uint16_t After_ADValue[M]; //´æ·Åȡƽ¾ùÖµºóµÄµçѹ
uint16_t Advalue;
void My_ADC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
/****¿ªÆôGPIOAºÍADC1ʱÖÓ*****/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1 | RCC_APB2Periph_AFIO,ENABLE);
/********ÉèÖÃADC1ʱÖÓ72/6=12MHZ*******/
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
/****ÅäÖÃ A0-4ΪģÄâÊäÈë******/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
/****³õʼ»¯ADC1*******/
/****5¸öת»»Í¨µÀ£¬Á¬Ðøģʽ£¬É¨Ãèģʽ£¬Êý¾ÝÓÒ¶ÔÆ룬ADC1ºÍADC2¶ÀÁ¢¹¤×÷£¬Èí¼þÆô¶¯×ª»»*****/
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //Á¬Ðøת»»Ä£Ê½
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //Êý¾ÝÓÒ¶ÔÆë
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //Èí¼þÆô¶¯×ª»»
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC1ºÍADC2¹¤×÷ÖжÀÁ¢Ä£Ê½
ADC_InitStructure.ADC_NbrOfChannel = 5; //ͨµÀÊý5
ADC_InitStructure.ADC_ScanConvMode = ENABLE; //¹¤×÷Á¬ÐøɨÃèģʽ
ADC_Init(ADC1,&ADC_InitStructure);
/****É趨5¸öͨµÀµÄת»»Ë³ÐòºÍ²ÉÑùʱ¼ä*****/
ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_1,2,ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_2,3,ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_3,4,ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_4,5,ADC_SampleTime_239Cycles5);
ADC_DMACmd(ADC1,ENABLE); //ʹÄÜADC1µÄDMA
ADC_Cmd(ADC1,ENABLE); //ʹÄÜADC1
ADC_ResetCalibration(ADC1); //¸´Î»ADC1У׼
while(ADC_GetResetCalibrationStatus(ADC1));//µÈ´ýADC1Íê³É¸´Î»Ð£×¼
ADC_StartCalibration(ADC1); //ÖØÐÂУ׼ADC1
while(ADC_GetCalibrationStatus(ADC1)); //µÈ´ýADC1У׼Íê³É
/*******Æô¶¯ADC1ת»»*********/
ADC_SoftwareStartConvCmd(ADC1,ENABLE);
}
void ADC_DMA_Init()
{
DMA_InitTypeDef DMA_InitStructure;
/*****ʹÄÜDMA1ʱÖÓ*****/
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
/*****DMA1µÄADC1³õʼ»¯****/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_BufferSize = M; //¶¨ÒåDMA»º´æ´óС£¬¿ª±Ù5¸öÄÚ´æ¿Õ¼ä£¬ÒòΪÐèÒªÓõ½5¸öADCͨµÀ
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //¶¨ÒåAD×÷ΪÊý¾Ý´«ÊäµÄÀ´Ô´
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //ÉèÖÃDMAͨµÀÊÇÄÚ´æµ½ÄÚ´æ´«Êä
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADCConvertedValue; //ÄÚ´æ»ùµØÖ·£¬¸æËßDMA½«´ÓADCÈ¡À´µÄÊý¾Ý´æ·ÅÔÚ´Ë
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //ÄÚ´æÊý¾Ý¿í¶È16λ
DMA_InitStructure.DMA_MemoryInc = DMA_PeripheralInc_Enable; //¶¨ÒåÄÚ´æµØÖ·µÝÔö
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //¹¤×÷ÔÚÑ »·»º´æģʽ
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; //ÍâÉè»ùµØÖ·£¬¸æËßDMA´Ó´ËÈ¡Êý¾Ý
//DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR; //ÍâÉè»ùµØÖ·£¬¸æËßDMA´Ó´ËÈ¡Êý¾Ý
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //ÍâÉèÊý¾Ý¿í¶È16λ
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //É趨¼Ä´æÆ÷µØÖ·¹Ì¶¨£¬¸æËßDMAÖ»´Ó1¸öµØÖ·È¡Êý¾Ý
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //ÉèÖøßÓÅÏȼ¶
DMA_Init(DMA1_Channel1,&DMA_InitStructure); //³õʼ»¯DMAͨµÀ1
DMA_Cmd(DMA1_Channel1,ENABLE); //ʹÄÜDMAͨµÀ1
}
/*********»ñÈ¡µçѹ*********/
uint16_t Get_voltage(uint16_t advalue)
{
advalue=advalue*330/4096;
Advalue = advalue;
return Advalue;
}
/*********µçѹÇóƽ¾ù********/
void Average_ADValue()
{
uint32_t sum=0;
uint8_t count,i;
for(i=0;i<M;i++)
{
for(count=0;count<N;count++)
{
sum+=ADCConvertedValue[count][i];
}
After_ADValue[i]=sum/N;
sum=0;
}
}
void MY_USART1_Init(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
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;//²¨ÌØÂÊ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//8λÊý¾Ý
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ÔÚÖ¡½áβ´«Êä1¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞУÑé
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;//·¢ËͺͽÓÊÕ¶¼Ê¹ÄÜ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//Ó²¼þÁ÷¿ØÖÆʧÄÜ
USART_Init(USART1,&USART_InitStructure);
USART_Cmd(USART1, ENABLE);//ʹÄÜ»òÕßʧÄÜUSARTÍâÉè
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//ʹÄÜ»òÕßʧÄÜÖ¸¶¨µÄUSARTÖжÏ
NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_Init(&NVIC_InitStructure);
}
int main(void)
{
uint16_t value[M];
uint8_t i;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
delay_init();
MY_USART1_Init();
LED_Pin();
My_ADC_Init();
ADC_DMA_Init();
//GPIO_SetBits(GPIOB,GPIO_Pin_0);
while(1)
{
LED();
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET); //µÈ´ý´«ÊäÍê³É£¬·ñÔòµÚһλÊý¾ÝÈÝÒ׶ªÊ§
for(i=0;i<5;i++)
{
//LED();
value[i]=Get_voltage(After_ADValue[i]);
printf("value[%d]:\t%d.%dv\n",i,value[i]/100,value[i]%100);
delay_ms(500);
}
}
}
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最佳答案
查看完整内容[请看2#楼]
已经解决了，DMA初始化里把DMA_PeripheralInc和DMA_MemoryInc的值错写成一样的了
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( 粤ICP备12000418号-1 )
发表于 2016-6-10 15:43:15
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