ADC 电压检测

2019-08-15 16:02发布

void adc_measure(u16 ch)
{
      u16 adcx;
      float temp;
      adcx=Get_Adc_Average(ch,100);
   usb_printf(" %d ",adcx);
      temp=(float)adcx*(3.3/4096);
   usb_printf(" %f ",temp);
}

int main(void)
{
      u16 t;
//    u16 delay;
      u16 data;
      u16 len;
      u16 times=0;
      u8 usbstatus=0;
      delay_init();          //ÑÓÊ±º¯Êý³õÊ¼»¯
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);    //ÉèÖÃNVICÖÐ¶Ï·Ö×é2:2Î»ÇÀÕ¼ÓÅÏÈ¼¶£¬2Î»ÏìÓ¦ÓÅÏÈ¼¶
      uart_init(115200);       //´®¿Ú³õÊ¼»¯Îª115200
      Adc_Init();                //ADC³õÊ¼»¯
   Relay_Init();       //relay³õÊ¼»¯
      LED_Init();                //³õÊ¼»¯ÓëLEDÁ¬½ÓµÄÓ²¼þ½Ó¿Ú
      delay_ms(1800);
      USB_Port_Set(0);    //USBÏÈ¶Ï¿ª
      delay_ms(700);
      USB_Port_Set(1); //USBÔÙ´ÎÁ¬½Ó
      Set_USBClock();
      USB_Interrupts_Config();
      USB_Init();
while(1)
{
      if(usbstatus!=bDeviceState)//USBÁ¬½Ó×´Ì¬·¢ÉúÁË¸Ä±ä.
      {
         usbstatus=bDeviceState;//¼ÇÂ¼ÐÂµÄ×´Ì¬
         if(usbstatus==CONFIGURED)
         {
            usb_printf("usb_connected ");
         }else
         {
            usb_printf("usb_disconnected ");
         }
      }
      if(USB_USART_RX_STA&0x8000)
      {
         len=USB_USART_RX_STA&0x3FFF;//µÃµ½´Ë´Î½ÓÊÕµ½µÄÊý¾Ý³¤¶È
         usb_printf("Äú·¢ËÍµÄÏûÏ¢Îª:");
         for(t=0;t<len;t++)
         {
            USB_USART_SendData(USB_USART_RX_BUF[t]);//ÒÔ×Ö½Ú·½Ê½,·¢ËÍ¸øUSB
         }
//Ñ¡ÔñÖ´ÐÐ¹¦ÄÜ
         data=(USB_USART_RX_BUF[0]-'0')*100+(USB_USART_RX_BUF[1]-'0')*10+USB_USART_RX_BUF[2]-'0';//»ñµÃÊý¾Ýdata
         //m=USB_USART_RX_BUF[0]-'0';
         switch(data)
         {
            //µçÑ¹¼ì²â
            case 100:adc_measure(ADC_Channel_0);break;
            case 101:adc_measure(ADC_Channel_1);break;
            case 102:adc_measure(ADC_Channel_2);break;
            case 103:adc_measure(ADC_Channel_3);break;
            case 104:adc_measure(ADC_Channel_4);break;
            case 105:adc_measure(ADC_Channel_5);break;
            default:usb_printf(" error ");break;
            case 106:adc_measure(ADC_Channel_6);break;
            case 107:adc_measure(ADC_Channel_7);break;
            case 108:adc_measure(ADC_Channel_8);break;
            case 109:adc_measure(ADC_Channel_9);break;
            case 110:adc_measure(ADC_Channel_10);break;
            case 111:adc_measure(ADC_Channel_11);break;
            case 112:adc_measure(ADC_Channel_12);break;
            case 113:adc_measure(ADC_Channel_13);break;
            case 114:adc_measure(ADC_Channel_14);break;
            case 115:adc_measure(ADC_Channel_15);break;
            case 116:adc_measure(ADC_Channel_16);break;

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

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_ADC1, ENABLE );    //Ê¹ÄÜADC1Í¨µÀÊ±ÖÓ

RCC_ADCCLKConfig(RCC_PCLK2_Div6); //ÉèÖÃADC·ÖÆµÒò×Ó6 72M/6=12,ADC×î´óÊ±¼ä²»ÄÜ³¬¹ý14M

//PA0/PA1/PA2/PA3/PA4/PA5/PA6/PA7 ×÷ÎªÄ£ÄâÍ¨µÀÊäÈëÒý½Å
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;       //Ä£ÄâÊäÈëÒý½Å
GPIO_Init(GPIOA, &GPIO_InitStructure);

//PB0/PB1 ×÷ÎªÄ£ÄâÍ¨µÀÊäÈëÒý½Å
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;       //Ä£ÄâÊäÈëÒý½Å
GPIO_Init(GPIOB, &GPIO_InitStructure);

//PC0/PC1/PC2/PC3/PC4/PC5 ×÷ÎªÄ£ÄâÍ¨µÀÊäÈëÒý½Å
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;       //Ä£ÄâÊäÈëÒý½Å
GPIO_Init(GPIOC, &GPIO_InitStructure);

ADC_DeInit(ADC1);  //¸´Î»ADC1,½«ÍâÉè ADC1 µÄÈ«²¿¼Ä´æÆ÷ÖØÉèÎªÈ±Ê¡Öµ

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC¹¤×÷Ä£Ê½:ADC1ºÍADC2¹¤×÷ÔÚ¶ÀÁ¢Ä£Ê½
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //Ä£Êý×ª»»¹¤×÷ÔÚµ¥Í¨µÀÄ£Ê½
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //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 = 16; //Ë³Ðò½øÐÐ¹æÔò×ª»»µÄADCÍ¨µÀµÄÊýÄ¿
ADC_Init(ADC1, &ADC_InitStructure); //¸ù¾ÝADC_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèADCxµÄ¼Ä´æÆ÷


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

}
//»ñµÃADCÖµ
//ch:Í¨µÀÖµ 0~15
u16 Get_Adc(u8 ch)
{
   //ÉèÖÃÖ¸¶¨ADCµÄ¹æÔò×éÍ¨µÀ£¬Ò»¸öÐòÁÐ£¬²ÉÑùÊ±¼ä
ADC_RegularChannelConfig(ADC1, ch, 16, ADC_SampleTime_239Cycles5 ); //ADC1,ADCÍ¨µÀ,²ÉÑùÊ±¼äÎª239.5ÖÜÆÚ

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

while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//µÈ´ý×ª»»½áÊø

return ADC_GetConversionValue(ADC1); //·µ»Ø×î½üÒ»´ÎADC1¹æÔò×éµÄ×ª»»½á¹û
}

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;
}

PA1一接上3.3V，其他通道都显示3.3V，怀疑是ADC_Init()有问题，但不知道那个地方修改错了，有没有了解的大神给予帮助下