//////////ADC0監(jiān)控中斷調(diào)試程序////////////////
/////////選擇AIN0.3為ADC0轉(zhuǎn)化輸入，單端模式/////
//調(diào)試時可采用變位器作為ADC輸入源，調(diào)節(jié)其電壓觀察監(jiān)控中斷情況//
//////adc0_capture.c///////////////////////////////////
#include "lcd.h"
#define ADC0START temppage=SFRPAGE;SFRPAGE=0x00;AD0BUSY=1;SFRPAGE=temppage
#define REAL_RATE 488L
#define ADJRATEDIF 237L
#define ADJRATESE 118L

/*
REAL_RATE為物理量轉(zhuǎn)化系數(shù),由具體對象而定
ADJRATEDIF為差動模式下，增益為0.5時ADC0轉(zhuǎn)化值與真實(shí)電壓的轉(zhuǎn)換系數(shù)
ADJRATESE為單端輸入模式下，增益為0.5時ADC0轉(zhuǎn)化值與真實(shí)電壓的轉(zhuǎn)換系數(shù)
*/

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;//將ADC0H-ADC0L通過sfr16實(shí)現(xiàn)
sfr16 ADC0GT=0xc4;
sfr16 ADC0LT=0xc6;
uchar temppage;
bit isnewdata;
bit adc_is_capture;
int kk;
long target_val;//工程量轉(zhuǎn)化值
long realvol;//真實(shí)測量電壓值
float temp;
void adc0_mux(uchar type,uchar source);
void adc0_source(uchar source);
void p3anolog_ini(uchar port);
void HVDA_ini(uchar gaind);
void adc0_ini();
void config();
void t2_ini();
void t2_baud(uint t2reload);
void t2_ini(){
	SFRPAGE = 0x00;
	TMR2CF = 0x08;  // T2時鐘為系統(tǒng)時鐘，計(jì)數(shù)方向?yàn)樵鲋涤?jì)數(shù)
	TMR2CN = 0x04;  // T2為16bit定時器模式，并啟動定時器運(yùn)行
}
void t2_baud(uint t2reload){//每隔t2reload個T2時鐘，產(chǎn)生一次定時溢出
	SFRPAGE = 0x00;
	RCAP2=~t2reload+1;//相當(dāng)于65536-t2reload
	TMR2=RCAP2;
}
void adc0_mux(uchar type,uchar source){//type 配置測量方式為差動還是單端輸入
//source 為ADC0通道選擇(共有9個通道)
	SFRPAGE=0x00;
	AMX0CF=type;
	AMX0SL=source;
}
void adc0_source(uchar source){//ADC0通道選擇，為adc0_mux()的簡化函數(shù)
	SFRPAGE=0x00;
	AMX0SL=source;
}
void p3anolog_ini(uchar port){//配置p3口模擬輸入管腳
	SFRPAGE=0x00;
	AMX0PRT=port;
	SFRPAGE=0x0f;
	P3MDIN&=~port;//將相應(yīng)管腳配置成模擬輸入口
}
void HVDA_ini(uchar gaind){
/*高壓差動放大器配置,調(diào)的只是第二級的增益，整體增益還需再乘以0.05；*/
//HVDA禁止時，HCAP＋上檢測到的是HVAIN＋的電壓
	SFRPAGE=0x00;
	HVA0CN=gaind;
}
void adc_capture(uint greater,uint less){//greater和less設(shè)置監(jiān)控范圍
	SFRPAGE=0x00;
	ADC0GT=greater;
	ADC0LT=less;
	AD0WINT=0;
	EIE1|=0x04;
}
void adc0_ini(){
	SFRPAGE=0x00;
	ADC0CF=0x0f;//ADC0時鐘為系統(tǒng)時鐘2分頻，PGA增益為0.5
	ADC0CN=0x8c;//AD0TM=0,ADC0為連續(xù)跟蹤模式，由T2溢出率啟動ADC0
	//AD0LJST=0,數(shù)據(jù)存儲格式右對齊，即ADC0H存放12bit高四位
	REF0CN&=0x0f;//AD0VRS=0,ADC0參考電壓為VREFA
	REF0CN|=0x07;//TEMPE=1,內(nèi)部溫度傳感器工作
	//BIASE=1,偏移產(chǎn)生器工作
	
	/*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	VREF0(C8051F040的16管腳相連，并最好并聯(lián)一個4.7uF和0.1uF的旁路電容以電平濾波*/
	
	adc0_mux(0x08,3);//PORT3IC=1,ADC0 6、7通道為差動模式
	//HVDA2C=0,4、5通道為單端模式
	//AIN0.0-AIN0.3均為單端模式
	//選擇AIN0.3為ADC0轉(zhuǎn)化通道
	EIE2 |= 0x02;        //開ADC0中斷
	t2_ini();
	t2_baud(6000);//每隔6000個T2時鐘產(chǎn)生一次ADC0采樣
	SFRPAGE=0x00;
	TR2=1;
}
void config (void) {
//看門狗禁止
    WDTCN = 0x07;	
    WDTCN = 0xDE;   
    WDTCN = 0xAD;
    SFRPAGE = 0x0F;
    XBR0 = 0x00;	
    XBR1 = 0x00;	
    XBR2 = 0x40;	//交叉開關(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口為開漏輸出
    P1MDOUT = 0x00; 
    P2MDOUT = 0x00; 
    P3MDOUT = 0x00; 
    P4MDOUT = 0x00; //P4口為開漏
    P5MDOUT = 0x07; 
    P6MDOUT = 0x00; 
    P7MDOUT = 0x00; 
    P1MDIN = 0xFF;  //所有端口為數(shù)字輸入，沒有模擬輸入端口
    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();//LCD初始化，具體見LCD章節(jié)部分
	adc0_ini();//ADC0初始化
	EA=1;
	i=0;
	realvol=0;
	adc_capture(0x0200,0x400);//設(shè)置監(jiān)控中斷范圍值
	showpage("ADC0 TEST","testing……");
	while(1){
		if(isnewdata){
			i++;
			if(i>40){//每采樣40次，顯示刷新一次
				i=0;
				showline("AIN0.1 VAL",0);
				showf(realvol,5,1);
			}
			isnewdata=0;
		}
		if(adc_is_capture){ 
			adc_is_capture=0;
			showline("ADC CAPTURE",0);
			showf(realvol,5,1);
			delay1ms(3000);
		}
	}
}
void ADC0_ISR() interrupt 15{
	SFRPAGE=0x00;
	AD0INT=0;
	kk=ADC0VAL;
	realvol=(long)kk*ADJRATESE;
	
	/*
	ADC0轉(zhuǎn)化值乘以單端電平系數(shù)，其結(jié)果為電平真實(shí)值乘以100000
	例如ADC0VAL=1024時，realvol=1024*118=120832,即表示真實(shí)電壓為1.20832v 
	*/
	
	target_val=(long)kk*REAL_RATE;
	isnewdata=1;
	
}
void ADC0_WIN_ISR() interrupt 8{//ADC0監(jiān)控中斷，在此用戶可加入需要處理的程序
	adc_is_capture=1;
	SFRPAGE=0x00;
	AD0WINT=0;
}