stm32 adc

Tada

我是在做stm32多通路的adc，查看了帖子之后发现，只能用DMA，然后我想问一下，是否可以用单通路的，但是打开多个通路，每次读取不同的通路，实验发现，两个通路之间影响很大，这种方法是否可行？
下面是代码~求大神看下~~
然后我看之前的帖子，说相互影响可能是采样时间短，但是我这个是两百多个周期了，也不算很短了吧，为什么相互之间的影响还是很大呢
/**************
oled????×?·????®?ò?????????????÷
2015/10/7
by S
*****************/
#include "stm32f10x.h"
#include "sys.h"
#include "delay.h"
#include "oled.h"
#include "lcd.h"

void adc_configration()
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
  /* ???? ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);              //72M/6=12,ADC×??ó?±??????????14M

/* ????PA1?????????? */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;//????????
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* ????ADC1, ????DMA, ???í??×?????·? */
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC1?¤×÷????:????????
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //?à?¨??????
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //?à??????×???
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;  //×??????í????·?????
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADC1??????????
ADC_InitStructure.ADC_NbrOfChannel = 2;   //???ò???????ò×?????ADC?¨????????
ADC_Init(ADC1, &ADC_InitStructure);   //?ù??ADC_InitStruct?????¨?????????????????èADC1???????÷


ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5); 

ADC_Cmd(ADC1, ENABLE);  //????ADC1

ADC_ResetCalibration(ADC1); //????ADC1????×??????÷

while(ADC_GetResetCalibrationStatus(ADC1)); //????ADC1??????×??????÷??×???,?è??×????ò????

ADC_StartCalibration(ADC1); //????ADC1????×?×???

while(ADC_GetCalibrationStatus(ADC1)); //??????×??ê??

ADC_SoftwareStartConvCmd(ADC1, ENABLE); //????ADC1???í??×???????????


}
u16 Get_Adc(u8 ch,u8 n)   
{
ADC_RegularChannelConfig(ADC1, ch, n, ADC_SampleTime_239Cycles5 ); 
  
ADC_SoftwareStartConvCmd(ADC1, ENABLE); //???????¨??ADC1???í??×???????????
 
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//????×????á??

return ADC_GetConversionValue(ADC1); //·???×??ü????ADC1???ò×é??×????á??
}

u16 Get_Adc_Average(u8 ch,u8 n,u8 times)
{
u32 temp_val=0;
u8 t;
for(t=0;t<times;t++)
{
temp_val+=Get_Adc(ch,n);
delay_ms(5);
}
return temp_val/times;
}
/***************
?÷????
***************/
 int main(void)
 {
  u16 adc1=0;
u16 adc2=0;
delay_init();     //???±??????????
gpio_configration();
LCD_Init(); 
LCD_CLS();
adc_configration();
//LCD_P6x8Str(0,0,"abcd");
LCD_long(100,0,5);
// LCD_num(0,0,100,16);
while(1)
{
      adc1=Get_Adc_Average(ADC_Channel_1,1,10);
// ADC_DR_DATA =0X00000000;
  LCD_num(0,2,adc1,16);
 delay_ms(500);
 adc2=Get_Adc_Average(ADC_Channel_2,1,10);
 LCD_num(0,0,adc2,16);

 delay_ms(500);
}
 }
 

正点原子

帮顶.....