在这个示例程序中,首先初始化了ADC和GPIO外设。然后,在一个无限循环中,读取光敏电阻的值并输出到控制台。读取光敏电阻的值是通过配置ADC转换通道和启动ADC转换实现的。读取到的光敏电阻的值存储在一个变量中,并使用printf函数输出到控制台。注意,在这个示例程序中,我们假设连接到ADC的光敏电阻连接到了PA0引脚。
#include "stm32f4xx.h"
int main(void)
{
// Initialize ADC
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
ADC_InitTypeDef ADC_InitStruct;
ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStruct.ADC_ScanConvMode = DISABLE;
ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStruct);
ADC_Cmd(ADC1, ENABLE);
// Initialize GPIO for photoresistor
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStruct);
// Infinite loop to continuously read photoresistor value and output to console
while(1)
{
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_84Cycles);
ADC_SoftwareStartConv(ADC1);
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));
uint16_t adcValue = ADC_GetConversionValue(ADC1);
printf("Photoresistor Value: %d\n", adcValue);
}
}
|