ADC实验显示的是小数，整数没有！！！！！！

Murder · 发表于 2017-3-15 23:15:41

用的开发板式stm32f407zgt6,自己仿照视频写的代码，不知道哪里有问题，lcd显示的只有小数，没有整数部分！！！麻烦大家指导一下！！

#include "adc.h"
#include "stm32f4xx.h"
#include "delay.h"

void Adc_Init(void)
{
ADC_CommonInitTypeDef ADC_CommonInitADC;
GPIO_InitTypeDef GPIO_InitADC;
ADC_InitTypeDef ADC_InitADC;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);

GPIO_InitADC.GPIO_Pin=GPIO_Pin_5;
GPIO_InitADC.GPIO_Mode=GPIO_Mode_AN;
GPIO_InitADC.GPIO_PuPd=GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA,&GPIO_InitADC);

  RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1, DISABLE);

ADC_CommonInitADC.ADC_Mode=ADC_Mode_Independent;
ADC_CommonInitADC.ADC_Prescaler=ADC_Prescaler_Div4;
ADC_CommonInitADC.ADC_DMAAccessMode=ADC_DMAAccessMode_Disabled;
ADC_CommonInitADC.ADC_TwoSamplingDelay=ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitADC);

ADC_InitADC.ADC_Resolution=ADC_Resolution_12b;
ADC_InitADC.ADC_ScanConvMode=DISABLE;
ADC_InitADC.ADC_ContinuousConvMode=DISABLE;
ADC_InitADC.ADC_ExternalTrigConvEdge=ADC_ExternalTrigConvEdge_None;
ADC_InitADC.ADC_DataAlign=ADC_DataAlign_Right;
ADC_InitADC.ADC_NbrOfConversion=1;
ADC_Init(ADC1,&ADC_InitADC);

ADC_Cmd(ADC1,ENABLE);

}

/*
ADC_Channel_1 || ADC_Channel_2||  ADC_Channel_3 ||ADC_Channel_4 ||ADC_Channel_5 ||ADC_Channel_6 || ADC_Channel_7 ||
ADC_Channel_8 || ADC_Channel_9 ||  ADC_Channel_10 ||  ADC_Channel_11 || ADC_Channel_12 ||ADC_Channel_13 ||
ADC_Channel_14 ||ADC_Channel_15 || ADC_Channel_16 || ADC_Channel_17 ||ADC_Channel_18

*/

u8 Get_ADCVal(u8 ch)
{
  ADC_RegularChannelConfig(ADC1,ch,1,ADC_SampleTime_480Cycles);

ADC_SoftwareStartConv(ADC1);

while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC)==0);

return ADC_GetConversionValue(ADC1);

}

u16 Get_ADC_avergeVal(u8 ch,u8 time)
{
  u32 sum=0;
u8 i;
for(i=0;i<time;i++)
{
   sum+=Get_ADCVal(ch);
delay_ms(5);
}

  return sum/time;
}

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "lcd.h"
#include "adc.h"

int main(void)
{
float temp;
u16 adcx;
delay_init(168);    //3õê¼»ˉÑóê±oˉêy
uart_init(115200); //3õê¼»ˉ′®¿ú2¨ìØÂêÎa115200
LED_Init();    //3õê¼»ˉLED
LCD_Init();          //3õê¼»ˉLCD FSMC½ó¿ú
Adc_Init();
POINT_COLOR=RED;    //»-±êÑÕé«￡ooìé«
LCD_ShowString(30,40,210,24,24,"Explorer STM32F4");
LCD_ShowString(30,70,200,16,16,"ADC TEST");

LCD_ShowString(30,130,200,16,16,"ADC1_CH5_VAL:");
LCD_ShowString(30,150,200,16,16,"ADC1_CH5_VOL:0.000V");

while(1)
{
            adcx=Get_ADC_avergeVal(ADC_Channel_5,20);
LCD_ShowxNum(134,130,adcx,4,16,0);
temp=(float)adcx*(3.3/4096);
adcx=temp;//Õûêy2¿·Ö
LCD_ShowxNum(134,150,adcx,1,16,0);
temp-=adcx;
temp*=1000;
LCD_ShowxNum(150,150,temp,3,16,0x80);
LED0=!LED0;
delay_ms(300);
}

}