#include "stm32f10x.h"
#include "delay.h"
#include "lcd.h"
#include "usart.h"
#include "LightSensor.h"

int main()
{
	u8 LightSensor = 0;
	
	delay_init();
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	LightSensor_InitConfig();
	uart_init(115200);
	LCD_Init();
	
	while(1)
	{
		LightSensor = DigitalConvLight();
		printf("LightSensor = %d\n",LightSensor);
		LCD_ShowNum(10,10,LightSensor,4,16);
		delay_ms(50);
	}
}

#include "LightSensor.h"
#include "stm32f10x.h"
#include "delay.h"

void LightSensor_InitConfig()
{
	ADC_InitTypeDef ADC_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3|RCC_APB2Periph_GPIOF,ENABLE);
	
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOF,&GPIO_InitStructure);
	
	ADC_DeInit(ADC3); // ADC3復位
	
	RCC_ADCCLKConfig(RCC_PCLK2_Div6); // ADC正常工作的頻率<=14MHz
	
	ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
	ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
	ADC_InitStructure.ADC_NbrOfChannel = 1;
	ADC_InitStructure.ADC_ScanConvMode = DISABLE;
	ADC_Init(ADC3,&ADC_InitStructure); // 設定ADC3的屬性
	
	ADC_Cmd(ADC3,ENABLE); // 設定完ADC3的屬性就使能ADC3
	
	ADC_ResetCalibration(ADC3);
	
	while(ADC_GetResetCalibrationStatus(ADC3) == SET); // 當函數返回為SET說明還在復位校準當中，當退出復位校準後函數返回RESET
	
	ADC_StartCalibration(ADC3);
	
	while(ADC_GetCalibrationStatus(ADC3) == SET); // 當函數返回為SET說明還在啟動校準當中，當校準完成後函數返回RESET
}

u16 GetSingleADCValue()
{
	u16 temp = 0;
	
	ADC_RegularChannelConfig(ADC3,ADC_Channel_6,1,ADC_SampleTime_28Cycles5); // 設定ADC3_CH6規則通道的屬性
	ADC_SoftwareStartConvCmd(ADC3,ENABLE); // ADC3的規則通道開始轉換
	
	while(ADC_GetFlagStatus(ADC3,ADC_FLAG_EOC) == RESET); // 等待ADC3_CH6規則通道轉換完成
	temp = ADC_GetConversionValue(ADC3);
	temp = temp>=4000?4000:temp;
	
	return temp;
}

u8 DigitalConvLight()
{
	u8 i = 0;
	float temp = 0;
	
	while(i<=4)
	{
		temp += GetSingleADCValue();
		i++;
	}
	temp = 100*(1 - temp/5/4000);
	
	return (u8)temp;
}

#ifndef _LIGHT_SENSOR_H
#define _LIGHT_SENSOR_H

#include "sys.h"

void LightSensor_InitConfig();
u16 GetSingleADCValue();
u8 DigitalConvLight();

#endif