infrare.c

这是本人毕业设计的源码部分,主要完成了步进电机的智能控制:采用AVR系列单片机做主空单元,可红外遥控,其中脉冲分配由CPLD实现.

//ICC-AVR application builder : 2006-5-31 10:57:45
// Target : M8
// Crystal: 8.0000Mhz

#include <iom8v.h>
#include <macros.h>


void port_init(void)
{
 PORTB = 0xFF;
 DDRB  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x11;
}

//TIMER1 initialize - prescale:1
// WGM: 4) CTC, TOP=OCRnA
// desired value: 38.4KHz
// actual value: 38.462KHz (0.2%)
void timer1_init(void)
{
 TCCR1B = 0x00; //stop
 TCNT1H = 0xFF; //setup
 TCNT1L = 0x31;
 OCR1AH = 0x00;
 OCR1AL = 0xCF;
 OCR1BH = 0x00;
 OCR1BL = 0xCF;
 ICR1H  = 0x00;
 ICR1L  = 0xCF;
 TCCR1A = 0x80;
 TCCR1B = 0x09; //start Timer
}

//UART0 initialize
// desired baud rate: 2400
// actual: baud rate:2404 (0.2%)
// char size: 8 bit
// parity: Odd
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x00;
 UCSRC = BIT(URSEL) | 0x36;
 UBRRL = 0xCF; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x28;
}

#pragma interrupt_handler uart0_udre_isr:13
void uart0_udre_isr(void)
{
 //character transferred to shift register so UDR is now empty
}

//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 timer1_init();
 uart0_init();

 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}

void delay()
{ unsigned char i = 100;
  while(i--);
}  


void main()
{ 
  init_devices(void);
  while(PORTB != 0x0)
  {
    unsigned char temp;
    temp = PORTB;
	switch(temp)
	{
	   case 1:
	    while(PORTB = 0)
	     {
	      UDR0 = 'A';            //A代表加速,
		                         //B代表减速,
		  delay();               //C为正方向
	      break:                 //D为反方向
		 }                       //E代表开
	   case 2:                   //F代表关
	   	    while(PORTB = 0)
	     {
	      UDR0 = 'B';
		  delay();
	      break:
		 } 
	   case 1:
	   	    while(PORTB = 0)
	     {
	      UDR0 = 'C';
		  delay();
	      break:
		 } 
	   case 4:
	   	    while(PORTB = 0)
	     {
	      UDR0 = 'D';
		  delay();
	      break:
		 } 
	   case 8:
	   	    while(PORTB = 0)
	     {
	      UDR0 = 'E';
		  delay();
	      break:
		 } 
	   case 16:
	   	    while(PORTB = 0)
	     {
	      UDR0 = 'F';
		  delay();
	      break:
		 } 
	   case 32:
	   	    while(PORTB = 0)
	     {
	      UDR0 = 'G';
		  delay();
	      break:
		 } 
	   case 64:
	   	    while(PORTB = 0)
	     {
	      UDR0 = 'E';
		  delay();
	      break:
		 } 

	}
  
  }


]