/////////ADC2調(diào)試程序，p1.2口單端輸入/////////////////
/////////T2定時(shí)采樣，ADC2監(jiān)控中斷/////////////////////
/////////ADC2.c////////////////////////////////////////
#include "lcd.h"
#define ADC0START temppage=SFRPAGE;SFRPAGE=0x00;AD0BUSY=1;SFRPAGE=temppage
#define ADJRATEDIF 260L
#define ADJRATESE 130L
sfr16 RCAP2=0xca;
sfr16 RCAP3=0xca;
sfr16 RCAP4=0xca;
sfr16 TMR4=0xcc;
sfr16 TMR3=0xcc;
sfr16 TMR2=0xcc;
sfr16 PCA0CP0=0xfb;
sfr16 PCA0CP1=0xfd;
sfr16 PCA0CP2=0xe9;
sfr16 PCA0CP3=0xeb;
sfr16 PCA0CP4=0xed;
sfr16 PCA0CP5=0xe1;
sfr16 ADC0VAL=0xbe;
sfr16 ADC0GT=0xc4;
sfr16 ADC0LT=0xc6;
uchar temppage;
bit isnewdata;
bit adc_is_capture;
uchar kk;
long realvol;
void adc2_mux(uchar type,uchar source);
void adc2_source(uchar source);
void anologPort_ini(uchar port);
void adc2_ini();
void config();
void t2_ini();
void t2_baud(uint t2reload);
void t2_ini(){
	SFRPAGE = 0x00;
	TMR2CF = 0x08;  // T2時(shí)鐘為系統(tǒng)時(shí)鐘
	TMR2CN = 0x04;  // 開(kāi)啟T2定時(shí)器
}
void t2_baud(uint t2reload){
	SFRPAGE = 0x00;
	RCAP2=~t2reload+1;
	TMR2=RCAP2;
}
void adc2_mux(uchar type,uchar source){//type 配置測(cè)量方式為差動(dòng)還是單端輸入
//source 為ADC2通道選擇(共有8個(gè)通道)
	SFRPAGE=0x02;
	AMX2CF=type;
	AMX2SL=source;
}
void adc2_source(uchar source){//ADC2通道選擇
	SFRPAGE=0x02;
	AMX2SL=source;
}
void anologPort_ini(uchar port){//配置p1口模擬輸入管腳
	SFRPAGE=0x0f;
	P1MDIN&=~port;//將相應(yīng)管腳配置成模擬輸入口
}
void adc2_ini(){
	SFRPAGE=0x02;
	ADC2CF=0x09;//ADC2時(shí)鐘為系統(tǒng)時(shí)鐘2分頻，PGA增益為1
	ADC2CN=0x86;//AD2TM=0,ADC2為連續(xù)跟蹤模式由T2溢出率啟動(dòng)ADC2
	SFRPAGE=0x00;
	REF0CN|=0x0b;//采用AV+作為參考電壓
	/*BIASE=1,偏移產(chǎn)生器工作，注意若AD啟動(dòng)此位必須置1，不管是否采用內(nèi)部參考電平
	REFBE=1,內(nèi)部參考電平工作，電路部分須將VREF參考輸出(C8051F40的第12管腳)與
	VREF2(C8051F040的17管腳)相連，并最好并聯(lián)一個(gè)4.7uF和0.1uF的旁路電容以電平濾波*/
	anologPort_ini(0x0f);//將P1.0-P1.3配置到AMUX2  0-3通道上，pdf文件上p2是錯(cuò)誤的。
	adc2_mux(0x01,2);
	/* 0,1通道為差動(dòng)輸入模式，其他為單端輸入模式，選擇2通道單端輸入進(jìn)入AD轉(zhuǎn)化*/
	EIE2|= 0x08;        //開(kāi)ADC2中斷
	t2_ini();
	t2_baud(6000);//設(shè)置6000個(gè)T2時(shí)鐘為采樣周期
	SFRPAGE=0x00;
	TR2=1;
}
void adc2_capture(uchar greater,uchar less){
	SFRPAGE=0x02;
	ADC2GT=greater;
	ADC2LT=less;
	AD2WINT=0;
	EIE2|=0x10;
}
void config (void) {
//看門(mén)狗禁止
    WDTCN = 0x07;	
    WDTCN = 0xDE;   
    WDTCN = 0xAD;
    SFRPAGE = 0x0F;
    XBR0 = 0x00;	
    XBR1 = 0x00;	
    XBR2 = 0x40;	//交叉開(kāi)關(guān)使能，使得P0-P3口能輸出
    XBR3 = 0x00;    
    SFRPAGE = 0x0F;
    P0MDOUT = 0x00; //端口配置，P0-P3，P6-P7口為開(kāi)漏輸出
    P1MDOUT = 0x00; 
    P2MDOUT = 0x00; 
    P3MDOUT = 0x00; 
    P4MDOUT = 0x00; //P4口為開(kāi)漏,若為推挽式則無(wú)法讀取LCD數(shù)據(jù)
    P5MDOUT = 0x07; 
    P6MDOUT = 0x00; 
    P7MDOUT = 0x00; 
    P1MDIN = 0xFF;  //所有端口為數(shù)字輸入，沒(méi)有模擬輸入端口
    P2MDIN = 0xFF;  
    P3MDIN = 0xFF; 
    SFRPAGE = 0x0F;
    CLKSEL = 0x00;  
    OSCXCN = 0x00;	
    OSCICN = 0x84;	
    //采用內(nèi)部晶振，為24.5MHZ8分頻
}  
void main(){
	uchar i;
	config();
	dispini();
	adc2_ini();
	i=0;
	kk=0;
	isnewdata=0;
	adc_is_capture=0;
	adc2_capture(64,128);//當(dāng)電壓在0.83-1.65之內(nèi)發(fā)生ADC2中斷
	EA=1;
	while(1){
		if(isnewdata){
			i++;
			if(i>40){
				i=0;
				showline("AIN1.2 VAL",0);
				showf(realvol,4,1);
				}
			isnewdata=0;
		}
		if(adc_is_capture){ //ADC2監(jiān)控條件測(cè)試
			adc_is_capture=0;
			showline("ADC2 CAPTURE",0);
			showf(realvol,4,1);
			delay1ms(100);
			EIE2|=0x10;//開(kāi)ADC2監(jiān)控中斷

			}
	}
}

void ADC2_WIN_ISR() interrupt 17{//ADC2監(jiān)控中斷程序
//只要ADC轉(zhuǎn)化值在此監(jiān)視范圍內(nèi)，則一直處于此中斷
	adc_is_capture=1;
	SFRPAGE=0x02;
	AD2WINT=0;
	EIE2&=~0x10;//關(guān)ADC2監(jiān)控中斷
/*
注意c8051f040.h頭文件定義錯(cuò)誤
原定義為：
sbit AD2WINT = ADC2CN ^ 3;         
sbit AD2CM2  = ADC2CN ^ 2;         
sbit AD2CM1  = ADC2CN ^ 1;         
sbit AD2CM0  = ADC2CN ^ 0;   
改為：
sbit AD2WINT = ADC2CN ^ 0;         
sbit AD2CM2  = ADC2CN ^ 3;         
sbit AD2CM1  = ADC2CN ^ 2;         
sbit AD2CM0  = ADC2CN ^ 1;         
*/
	
}
void ADC2_ISR() interrupt 18{//ADC2轉(zhuǎn)化完畢中斷程序
	AD2INT=0;
	kk=ADC2;
	realvol=(long)kk;
	realvol*=ADJRATESE;//realvol為真實(shí)電壓值的1.0e4倍
	isnewdata=1;
}