ADC多路采集求组

allenzhou · 发表于 2015-7-26 16:13:31

利用ADC做多路采集，出来其他两路是对的，有一路出来总是为0，不知道怎么回事，烦请大家帮忙解决一下问题

/**
******************************************************************************
* @file main.c
* @author fire
* @version V1.0
* @date 2013-xx-xx
* @brief adc1 2é¼ˉêμÑé
******************************************************************************
* @attention
*
* êμÑéÆ½ì¨:ò°»e iSO STM32 ¿a·￠°å
* ÂÛì3 :http://www.firebbs.cn
* ìÔ±| :http://firestm32.taobao.com
*
******************************************************************************
*/
//time : pc1-1 0 1us
// pc1-2 0 0.5us 1.5us
// pc1-3 0 0.5us 0.8us
#include "stm32f10x.h"
#include "bsp_usart1.h"
#include "bsp_adc.h"
// ADC1×a»»μÄμçÑ1Öμí¨1yMDA·½ê½′«μ½SRAM
extern __IO uint16_t ADC_ConvertedValue[3];
// ¾Ö2¿±äá¿￡¬óÃóú±￡′æ×a»»¼ÆËãoóμÄμçÑ1Öμ
float ADC_ConvertedValueLocal[3];
// èí¼tÑóê±
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
/**
* @brief Ö÷oˉêy
* @param ÎT
* @retval ÎT
*/
int main(void)
{
uint8_t i;
/* USART1 config */
USART1_Config();
/* enable adc1 and config adc1 to dma mode */
ADC1_Init();
printf("\r\n ----ÕaêÇò»¸öADCêμÑé(DMA′«êä)----\r\n");
while (1)
{
for(i=3;i>0;i--)
{
ADC_ConvertedValueLocal[i] =(float) ADC_ConvertedValue[i]/4096*3.3; // ¶áè¡×a»»μÄADÖμ
printf("\r\n The current AD value = 0x%04X \r\n", ADC_ConvertedValue[i]);
printf("\r\n The current AD value = %f V \r\n",ADC_ConvertedValueLocal[i]);
Delay(0xffffee);
}
}
}
/*********************************************END OF FILE**********************/
/**
******************************************************************************
* @file bsp_usart1.c
* @author fire
* @version V1.0
* @date 2013-xx-xx
* @brief ÖØÏÖc¿aprintfoˉêyμ½usart¶Ë¿ú
******************************************************************************
* @attention
*
* êμÑéÆ½ì¨:ò°»e iSO STM32 ¿a·￠°å
* ÂÛì3 :http://www.firebbs.cn
* ìÔ±| :http://firestm32.taobao.com
*
******************************************************************************
*/
#include "bsp_usart1.h"
/**
* @brief USART1 GPIO ÅäÖÃ,1¤×÷Ä￡ê½ÅäÖÃ¡￡115200 8-N-1
* @param ÎT
* @retval ÎT
*/
void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
/* USART1 GPIO config */
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
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);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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);
}
///ÖØ¶¨Ïòc¿aoˉêyprintfμ½USART1
int fputc(int ch, FILE *f)
{
/* ·￠Ëíò»¸ö×Ö½úêy¾Yμ½USART1 */
USART_SendData(USART1, (uint8_t) ch);
/* μè′y·￠Ëííê±Ï */
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
return (ch);
}
///ÖØ¶¨Ïòc¿aoˉêyscanfμ½USART1
int fgetc(FILE *f)
{
/* μè′y′®¿ú1êäèëêy¾Y */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
return (int)USART_ReceiveData(USART1);
}
/*********************************************END OF FILE**********************/
/**
******************************************************************************
* @file bsp_xxx.c
* @author fire
* @version V1.0
* @date 2013-xx-xx
* @brief adc1 ó|óÃbsp / DMA Ä￡ê½
******************************************************************************
* @attention
*
* êμÑéÆ½ì¨:ò°»e iSO STM32 ¿a·￠°å
* ÂÛì3 :http://www.firebbs.cn
* ìÔ±| :http://firestm32.taobao.com
*
******************************************************************************
*/
#include "bsp_adc.h"
#define ADC1_DR_Address ((u32)0x40012400+0x4c)
__IO uint16_t ADC_ConvertedValue[3];
//__IO u16 ADC_ConvertedValueLocal;
/**
* @brief ê1ÄüADC1oíDMA1μÄê±Öó￡¬3õê¼»ˉPC.01
* @param ÎT
* @retval ÎT
*/
static void ADC1_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable DMA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE);
/* Configure PC.01 as analog input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure); // PC1,êäèëê±2»óÃéèÖÃËùÂê
}
/**
* @brief ÅäÖÃADC1μÄ1¤×÷Ä￡ê½ÎaMDAÄ￡ê½
* @param ÎT
* @retval ÎT
*/
static void ADC1_Mode_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
/* DMA channel1 configuration */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; //ADCμØÖ·
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue; //Äú′æμØÖ·
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 3;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //íaéèμØÖ·1ì¶¨
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //Äú′æμØÖ·1ì¶¨
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //°ë×Ö
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //Ñ-»·′«êä
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* Enable DMA channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC1 configuration */
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //¶àá￠ADCÄ￡ê½
ADC_InitStructure.ADC_ScanConvMode = ENABLE ; //½ûÖ1é¨ÃèÄ￡ê½￡¬é¨ÃèÄ￡ê½óÃóú¶àí¨μà2é¼ˉ
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //¿aÆôá¬Dø×a»»Ä￡ê½￡¬¼′2»í￡μØ½øDDADC×a»»
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //2»ê1óÃía2¿′￥·￠×a»»
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //2é¼ˉêy¾Yóò¶ÔÆë
ADC_InitStructure.ADC_NbrOfChannel = 3; //òa×a»»μÄí¨μàêyÄ¿1
ADC_Init(ADC1, &ADC_InitStructure);
/*ÅäÖÃADCê±Öó￡¬ÎaPCLK2μÄ8·ÖÆμ￡¬¼′9MHz*/
RCC_ADCCLKConfig(RCC_PCLK2_DiARM);
/*ÅäÖÃADC1μÄí¨μà11Îa55. 5¸ö2éÑùÖüÆú￡¬DòáDÎa1 */
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3, ADC_SampleTime_55Cycles5);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/*¸′Î»D￡×¼¼Ä′æÆ÷ */
ADC_ResetCalibration(ADC1);
/*μè′yD￡×¼¼Ä′æÆ÷¸′Î»íê3é */
while(ADC_GetResetCalibrationStatus(ADC1));
/* ADCD￡×¼ */
ADC_StartCalibration(ADC1);
/* μè′yD￡×¼íê3é*/
while(ADC_GetCalibrationStatus(ADC1));
/* óéóúÃ»óD2éóÃía2¿′￥·￠￡¬ËùòÔê1óÃèí¼t′￥·￠ADC×a»» */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
/**
* @brief ADC13õê¼»ˉ
* @param ÎT
* @retval ÎT
*/
void ADC1_Init(void)
{
ADC1_GPIO_Config();
ADC1_Mode_Config();
}
/*********************************************END OF FILE**********************/

复制代码

fire · 发表于 2015-7-27 08:50:19

你把工程传上来看看

allenzhou · 发表于 2015-7-27 09:53:41

fire 发表于 2015-7-27 08:50
你把工程传上来看看

谢谢火哥，问题我已经解决了，数组那里出了问题

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ADC多路采集求组

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