怎么一个adc多通道用或者怎么2个adc一起用

我是个小白菜 · 发表于 2016-7-15 11:51:25

void  Adc_Init(void)
{

RCC->APB2ENR|=1<<2;
GPIOA->CRL&=0XFFFFFF0F;

RCC->APB2ENR|=1<<9;
RCC->APB2RSTR|=1<<9;
RCC->APB2RSTR&=~(1<<9);
RCC->CFGR&=~(3<<14);

RCC->CFGR|=2<<14;
ADC1->CR1&=0XF0FFFF;
ADC1->CR1|=0<<16;
ADC1->CR1&=~(1<<8);
ADC1->CR2&=~(1<<1);
ADC1->CR2&=~(7<<17);
ADC1->CR2|=7<<17;
ADC1->CR2|=1<<20;
ADC1->CR2&=~(1<<11);
ADC1->SQR1&=~(0XF<<20);
ADC1->SQR1|=0<<20;

ADC1->SMPR2&=~(7<<3);
ADC1->SMPR2|=7<<3;
ADC1->CR2|=1<<0;
ADC1->CR2|=1<<3;
while(ADC1->CR2&1<<3);

ADC1->CR2|=1<<2;
while(ADC1->CR2&1<<2);

}

u16 Get_Adc(u8 ch)
{

ADC1->SQR3&=0XFFFFFFE0;
ADC1->SQR3|=ch;
ADC1->CR2|=1<<22;
while(!(ADC1->SR&1<<1));
return ADC1->DR;
}

u16 Get_Adc_Average(u8 ch,u8 times)
{
u32 temp_val=0;
u8 t;
for(t=0;t<times;t++)
{
temp_val+=Get_Adc(ch);
delay_ms(5);
}
return temp_val/times;
}

以上是给的模板，只适用配置PA1为adc输入，接收一个信号。。现在我想接受两个信号，查资料和问人得知道了可以一个ad多通道用或者2个ad一起用，但是我小白，很多不懂啊。求大神基于我给的寄存器版本的代码基础，教我怎么写2个信号的代码！！急急急

xiaozi_sxx · 发表于 2016-7-15 11:51:26

void  Adc_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1 , ENABLE );    //Ê¹ÄÜADC1Í¨µÀÊ±ÖÓ
  RCC_AHBPeriphClockCmd (RCC_AHBPeriph_DMA1|RCC_AHBPeriph_DMA2,ENABLE);
  DMA_InitTypeDef  DMA_InitStructure;
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = 0x4001244C;                         //ÉèÖÃÍâÉèµÄµØÖ·
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Adcvalue;                      //ÉèÖÃÍâÉèÊý×éµÄµØÖ·
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;                            //´«Êä·½ÏòÍâÉè×÷ÎªÔ´
DMA_InitStructure.DMA_BufferSize = 2;                                           //Êý¾Ý×ªÒÆÁ¿Îª2Â·£¬2Â·AD
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;                         //ÄÚ´æµØÖ·Ôö¼Ó
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;                //ÍâÉèµØÖ·²»±ä
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;    //ÍâÉè°ë×Ö´«Êä
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;             //ÄÚ´æ°ë×Ö´«Êä
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;                               //Ñ»·²É¼¯
DMA_InitStructure.DMA_Priority = DMA_Priority_High;                            //ÓÅÏÈ¼¶¸ß
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;                                  //ÄÚ´æµ½ÄÚ´æµÄ´«Êä²»Ê¹ÄÜ
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);

DMA_Cmd(DMA1_Channel1, ENABLE);


GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //PA0¡&cent

A1 ×÷ÎªÄ£ÄâÍ¨µÀÊäÈëÒý½Å
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //Ä£ÄâÊäÈëÒý½Å
GPIO_Init(GPIOC, &GPIO_InitStructure);

ADC_DeInit(ADC1);  //¸´Î»ADC1

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC¹¤×÷Ä£Ê½:ADC1ºÍADC2¹¤×÷ÔÚ¶ÀÁ¢Ä£Ê½
ADC_InitStructure.ADC_ScanConvMode = ENABLE; //Ä£Êý×ª»»¹¤×÷ÔÚµ¥Í¨µÀÄ£Ê½
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //Ä£Êý×ª»»¹¤×÷ÔÚµ¥´Î×ª»»Ä£Ê½
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //×ª»»ÓÉÈí¼þ¶ø²»ÊÇÍâ²¿´¥·¢Æô¶¯
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADCÊý¾ÝÓÒ¶ÔÆë
ADC_InitStructure.ADC_NbrOfChannel = 2; //Ë³Ðò½øÐÐ¹æÔò×ª»»µÄADCÍ¨µÀµÄÊýÄ¿
ADC_Init(ADC1, &ADC_InitStructure); //¸ù¾ÝADC_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèADCxµÄ¼Ä´æÆ÷
  RCC_ADCCLKConfig(RCC_PCLK2_Div6); //ÉèÖÃADC·ÖÆµÒò×Ó6 72M/6=12,ADC×î´óÊ±¼ä²»ÄÜ³¬¹ý14M
  ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_239Cycles5 ); //ADC1,ADCÍ¨µÀ,²ÉÑùÊ±¼äÎª239.5ÖÜÆÚ
  ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_239Cycles5 ); //ADC1,ADCÍ¨µÀ,²ÉÑùÊ±¼äÎª239.5ÖÜÆÚ
ADC_DMACmd(ADC1,ENABLE);

ADC_Cmd(ADC1, ENABLE); //Ê¹ÄÜÖ¸¶¨µÄADC1

ADC_ResetCalibration(ADC1); //Ê¹ÄÜ¸´Î»Ð£×¼

while(ADC_GetResetCalibrationStatus(ADC1)); //µÈ´ý¸´Î»Ð£×¼½áÊø

ADC_StartCalibration(ADC1);    //¿ªÆôADÐ£×¼

while(ADC_GetCalibrationStatus(ADC1));    //µÈ´ýÐ£×¼½áÊø

ADC_SoftwareStartConvCmd(ADC1, ENABLE); //Ê¹ÄÜÖ¸¶¨µÄADC1µÄÈí¼þ×ª»»Æô¶¯¹¦ÄÜ

}

通道1放在Adcvalue[0]里面，通道2放在Adcvalue[1]里面