main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "AD.h"
uint16_t ADValue;
float Voltage;
int main(void)
{
OLED_Init();
AD_Init();
OLED_ShowString(1,1,"ADValue:");
OLED_ShowString(2,1,"Voltage:0.00V");
while(1)
{
ADValue = AD_GetValue();
Voltage = (float)ADValue / 4095 * 3.3;
OLED_ShowNum(1,9,ADValue,4);
OLED_ShowNum(2,9,Voltage,1);
OLED_ShowNum(2,11,(uint16_t)(Voltage * 100) % 100,2);
}
}
AD.c
#include "stm32f10x.h" // Device header
void AD_Init(void)
{
/*****开启时钟*****/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
/*****配置ADCCLK******/
RCC_ADCCLKConfig(RCC_PCLK2_Div6); //ADCCLK = 72MHz/6 = 12MHz
/*****初始化GPIO为模拟输入引脚*****/
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN; //AIN时,GPIO无效,防止干扰模拟电压,ADC的专属模式
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
/*****规则组输入通道配置 *****/
ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);
/***** 初始化ADC*****/
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //软件触发
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1,&ADC_InitStructure);
/*****开启ADC电源*****/
ADC_Cmd(ADC1,ENABLE);
/*****ADC校准*****/
ADC_ResetCalibration(ADC1); //复位校准
while (ADC_GetResetCalibrationStatus(ADC1) == SET); //检测是否复位完成
ADC_StartCalibration(ADC1); //校准
while (ADC_GetCalibrationStatus(ADC1) ==SET); //检测是否校准完成
}
uint16_t AD_GetValue(void)
{
ADC_SoftwareStartConvCmd(ADC1,ENABLE);
while (ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC) == RESET);
return ADC_GetConversionValue(ADC1);
}
单通道、连续非扫描:
只需要更改几行代码(标~为更改的部分)
~ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
/*****ADC校准*****/
ADC_ResetCalibration(ADC1); //复位校准
while (ADC_GetResetCalibrationStatus(ADC1) == SET); //检测是否复位完成
ADC_StartCalibration(ADC1); //校准
while (ADC_GetCalibrationStatus(ADC1) ==SET);
~ADC_SoftwareStartConvCmd(ADC1,ENABLE);
}
uint16_t AD_GetValue(void)
{
~return ADC_GetConversionValue(ADC1);
}
点一道菜 吃一道菜 吃完再点 点完再吃
相比于上个代码改动不大
只需要把通道配置放在这里,每次赋值即可
uint16_t AD_GetValue(uint8_t ADC_Channel)
{
ADC_RegularChannelConfig(ADC1,ADC_Channel,1,ADC_SampleTime_55Cycles5);
ADC_SoftwareStartConvCmd(ADC1,ENABLE);//触发转换
while (ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC) == RESET);
return ADC_GetConversionValue(ADC1);
}
main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "AD.h"
uint16_t AD0,AD1,AD2,AD3;
int main(void)
{
OLED_Init();
AD_Init();
OLED_ShowString(1,1,"AD0:");
OLED_ShowString(2,1,"AD1:");
OLED_ShowString(3,1,"AD2:");
OLED_ShowString(4,1,"AD3:");
while(1)
{
AD0 = AD_GetValue(ADC_Channel_0);
AD1 = AD_GetValue(ADC_Channel_1);
AD2 = AD_GetValue(ADC_Channel_2);
AD3 = AD_GetValue(ADC_Channel_3);
OLED_ShowNum(1,5,AD0,4);
OLED_ShowNum(2,5,AD1,4);
OLED_ShowNum(3,5,AD2,4);
OLED_ShowNum(4,5,AD3,4);
Delay_ms(100);
}
}
现象:
AD0(电位器) 左小右大
AD1(光敏) 遮挡 AD增大
AD2(热敏) 温度升高 AD减小
AD3(对射) 障碍物靠近 AD有反光 AD减小