ini.i

mega8产生的两路PWM信号

// CodeVisionAVR C Compiler
// (C) 1998-2004 Pavel Haiduc, HP InfoTech S.R.L.

// I/O registers definitions for the ATmega8


#pragma used+
sfrb TWBR=0;
sfrb TWSR=1;
sfrb TWAR=2;
sfrb TWDR=3;
sfrb ADCL=4;
sfrb ADCH=5;
sfrw ADCW=4;      // 16 bit access
sfrb ADCSRA=6;
sfrb ADMUX=7;
sfrb ACSR=8;
sfrb UBRRL=9;
sfrb UCSRB=0xa;
sfrb UCSRA=0xb;
sfrb UDR=0xc;
sfrb SPCR=0xd;
sfrb SPSR=0xe;
sfrb SPDR=0xf;
sfrb PIND=0x10;
sfrb DDRD=0x11;
sfrb PORTD=0x12;
sfrb PINC=0x13;
sfrb DDRC=0x14;
sfrb PORTC=0x15;
sfrb PINB=0x16;
sfrb DDRB=0x17;
sfrb PORTB=0x18;
sfrb EECR=0x1c;
sfrb EEDR=0x1d;
sfrb EEARL=0x1e;
sfrb EEARH=0x1f;
sfrw EEAR=0x1e;   // 16 bit access
sfrb UBRRH=0x20;
sfrb UCSRC=0X20;
sfrb WDTCR=0x21;
sfrb ASSR=0x22;
sfrb OCR2=0x23;
sfrb TCNT2=0x24;
sfrb TCCR2=0x25;
sfrb ICR1L=0x26;
sfrb ICR1H=0x27;
sfrw ICR1=0x26;   // 16 bit access
sfrb OCR1BL=0x28;
sfrb OCR1BH=0x29;
sfrw OCR1B=0x28;  // 16 bit access
sfrb OCR1AL=0x2a;
sfrb OCR1AH=0x2b;
sfrw OCR1A=0x2a;  // 16 bit access
sfrb TCNT1L=0x2c;
sfrb TCNT1H=0x2d;
sfrw TCNT1=0x2c;  // 16 bit access
sfrb TCCR1B=0x2e;
sfrb TCCR1A=0x2f;
sfrb SFIOR=0x30;
sfrb OSCCAL=0x31;
sfrb TCNT0=0x32;
sfrb TCCR0=0x33;
sfrb MCUCSR=0x34;
sfrb MCUCR=0x35;
sfrb TWCR=0x36;
sfrb SPMCR=0x37;
sfrb TIFR=0x38;
sfrb TIMSK=0x39;
sfrb GIFR=0x3a;
sfrb GICR=0x3b;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-

// Interrupt vectors definitions





extern void delay_us(unsigned int i);
extern void ini_xt(void);
extern unsigned char get_key(void);
extern void display(void);

extern unsigned int ch1,ch2;        //通道1，通道2，

extern unsigned char fs,td;         //方式（输入输出）,输入通道,ADC结果指针

extern unsigned char in0,in1;	    //外部中断次数

extern unsigned int js1,js2;       //转速计数 

extern unsigned char zz;       //AD转换切换

extern const unsigned char sz[];


//准备
void ini_xt(void)
{switch(fs)
        {case 1://红灯亮-双脉宽输出
		        //I/O
		        DDRD=0xff;              //PD全部设为输出
				//ADC            
		        if(zz==1){ADMUX=0x00;}  //外部参考电压，右对齐，通道0
		        else if(zz==2){ADMUX=0x01;}//外部参考电压，右对齐，通道1    //ADC
			ADCSRA=0xc8+6;          //ADC使能中断，开始转换，允许中断，2分频因子		  
				//T1
			OCR1A=0x47;             //T1比较匹配A
    			TIMSK=0x1c;             //使能比较A/B；使能溢出
			TCCR1A=0x03;            //10位快速PWM模式
			TCCR1B=0x0b;            //10位快速PWM模式;8分频
				//外部中断
			GICR=0x00;	        //INT0-INT1禁止中断
				//其他
				
				break;
		 case 2://绿灯亮-双脉宽输入
		        //I/O
			DDRD.2=DDRD.3=0;        //中断引脚配置为输入
				//ADC
			ch1=ch2=0;	
				//T1
			TIMSK=0x00;             //屏蔽T1所有
			TCCR1B=0x01;            //无分频(系统时钟)
				//外部中断
			MCUCR|=0x0f;            //INT0-INT1上升沿触发
			GICR=0xc0;	        //INT0-INT1使能中断
				//其他
				
		        break;
		 case 3://红绿灯亮-数字舵机
		        //I/O
			DDRD=0xff;              //PD全部设为输出
				//ADC
				
				//T1
				
				//外部中断
				
				//其他
				
		        break;
		 case 4://红绿灯灭-转速测量
		        //I/O
				DDRD=DDRD&0xf3;	   //中断引脚配置为输入
				//ADC
				
				//T1
				TIMSK=0x04;        //使能T1中断
				TCCR1B=0x03;       //系统时钟64分频
				//外部中断
				MCUCR=MCUCR|0x0f;  //INT0-INT1上升沿触发
				GICR=0xc0;	   	   //INT0-INT1使能中断
				//其他
				
		        break;
		 }
 }