主函數
#include "adc.h"
#include "delay.h"
#include "stm32f10x.h"
#include "usart.h"
int main(void)
{
u16 adc;
float temp;
delay_init();
uart_init(115200);
Adc_Init();
while(1)
{
adc = Get_Adc_Average(ADC_Channel_1,10);
temp = (float) adc *(3.3/15520);
}
ADC.c 文件
#include "adc.h"
#include "delay.h"
void Adc_Init()
{
GPIO_InitTypeDef GPIO_InitStruct;
ADC_InitTypeDef ADC_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_ADC1,ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
GPIO_InitStruct.GPIO_Pin=GPIO_Pin_1;
GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AIN;
GPIO_Init(GPIOA,&GPIO_InitStruct);
ADC_DeInit(ADC1);
ADC_InitStruct.ADC_Mode=ADC_Mode_Independent;
ADC_InitStruct.ADC_ScanConvMode=DISABLE;
ADC_InitStruct.ADC_ContinuousConvMode=DISABLE;
ADC_InitStruct.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;
ADC_InitStruct.ADC_DataAlign=ADC_DataAlign_Right;
ADC_InitStruct.ADC_NbrOfChannel=1;
ADC_Init(ADC1,&ADC_InitStruct);
ADC_Cmd(ADC1,ENABLE);
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1))
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
}
u16 Get_Adc(u8 ch)
{
ADC_RegularChannelConfig(ADC1,ch,1,ADC_SampleTime_239Cycles5);
ADC_SoftwareStartConvCmd(ADC1,ENABLE);
while(! ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC));
return ADC_GetConversionValue(ADC1);
}
u16 Get_Adc_Average(u8 ch,u8 times)
{
u32 temp_value=0;
u8 t;
for(t=0;t<10;t++)
{
temp_value +=Get_Adc(ch);
delay_ms(5);
}
return temp_value / times;
}
.h文件
#ifndef _ADC_H
#define _ADC_H
#include "sys.h"
void Adc_Init(void);
u16 Get_Adc(u8 ch);
u16 Get_Adc_Average(u8 ch,u8 times);
#endif
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