9.c

这里有11个用ICCAVR开发的源代码,经DEMO板调试后已经通过.

//ICC-AVR application builder : 2005-3-8 15:25:12
// Target : M48
// Crystal: 8.0000Mhz

#include <iom48v.h>
#include <macros.h>
static unsigned char yuequ[]={0x66,0x27,0x68,0x26,0x28,0x28,0x27,0x26,0x47,0x43,
	  	       0x67,0x28,0x69,0x27,0x29,0x29,0x28,0x27,0x46,0x46,
		       0x4a,0x4d,0x4c,0x2d,0x2c,0x2b,0x2b,0x2a,0x29,0x4a,
		       0x46,0x20,0x4b,0x29,0x6a,0x28,0x27,0x23,0x28,0x27,
		       0x46,0x46,0x4a,0x4d,0x4c,0x2d,0x2c,0x2b,0x2b,0x2a,
		       0x29,0x4a,0x46,0x20,0x4b,0x29,0x6a,0x28,0x27,0x23,
		       0x28,0x27,0x46,0x46,0x00};
//乐曲编码
static unsigned int yinpin[16]={0,392,440,494,523,
  587,659,698,784,880,988,1046,1174,1318,1397,1568};
//音频表
unsigned char yinyue,jiepai,delay_tone,pb_buf;
unsigned int yinfu,num=0;

void port_init(void)
{
 PORTB = 0xFF;
 DDRB  = 0x00;
 PORTC = 0x7F; //m103 output only
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD  = 0x08;
}

//TIMER0 initialize - prescale:1024
// WGM: Normal
// desired value: 5mSec
// actual value:  4.992mSec (0.2%)
void timer0_init(void)
{
 TCCR0B = 0x00; //stop
 TCNT0 = 0xD9; //set count
 TCCR0A = 0x01; 
 TCCR0B = 0x05; //start timer
}

#pragma interrupt_handler timer0_ovf_isr:17
void timer0_ovf_isr(void)
{
 TCNT0 = 0xD9; //set count
 delay_tone++;
 //TIMER0 has overflowed
}

//TIMER1 initialize - prescale:8
// WGM: 9) PWM phz freq correct, TOP=OCRnA
// desired value: 1Hz
// actual value: Out of range
void timer1_init(void)
{
 TCCR1B = 0x00; //stop
 TCNT1H = 0x00 /*INVALID SETTING*/; //setup
 TCNT1L = 0x00 /*INVALID SETTING*/;
 OCR1AH = 0xff /*INVALID SETTING*/;
 OCR1AL = 0xff /*INVALID SETTING*/;
 OCR1BH = 0x00 ;/*INVALID SETTING*/;
 OCR1BL = 0x00 /*INVALID SETTING*/;
 ICR1H  = 0x00 /*INVALID SETTING*/;
 ICR1L  = 0x00 /*INVALID SETTING*/;
 TCCR1A = 0x41;
 TCCR1B = 0x12; //start Timer
}

#pragma interrupt_handler timer1_compa_isr:12
void timer1_compa_isr(void)
{
 //compare occured TCNT1=OCR1A
 PORTD^=0x08;//翻转PD3输出状态
}

//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 timer0_init();
 timer1_init();

 MCUCR = 0x00;
 EICRA = 0x00; //extended ext ints
 EIMSK = 0x00;
 
 TIMSK0 = 0x01; //timer 0 interrupt sources
 TIMSK1 = 0x02; //timer 1 interrupt sources
 TIMSK2 = 0x00; //timer 2 interrupt sources
 
 PCMSK0 = 0x00; //pin change mask 0 
 PCMSK1 = 0x00; //pin change mask 1 
 PCMSK2 = 0x00; //pin change mask 2
 PCICR = 0x00; //pin change enable 
 PRR = 0x00; //power controller
// SEI(); //re-enable interrupts
 //all peripherals are now initialized
}


void main(void)
{	 //主函数
 unsigned char yin_temp;//定义局部字符型变量
 init_devices();//调用芯片初始化函数
 while(1)//等待PD2按键按下	
 {	  //无键按下等待
  pb_buf=PIND & 0x4;     //pd2=0
  if(pb_buf==0){break;}
 }//有键按下运行下面的程序
 DDRD = 0xFF;PORTD=0xFF;//PD口输出
 yinyue=yuequ[num];//取第一个乐曲编码
 SEI();//开中断
 while(yinyue != 0)
 {
  yinyue=yuequ[num];//取乐曲编码
  jiepai=(yinyue >>4) * 20;//求得节拍码
  yinfu=yinyue& 0x0f;
  yinfu=yinpin[yinfu];//取得音频
  yinfu = 400000/yinfu; OCR1A=yinfu;//换算得到比较匹配值
  while(delay_tone<jiepai);//节拍延时
  delay_tone=0;num++;//取下个乐曲编码
 }
 CLI();//关中断
 PORTD=0xFF;//停止输出
}