m16pwm1._c

AVR程序

//ICC-AVR application builder : 2007-4-10 下午 03:03:28
// Target : M16
// Crystal: 1.0000Mhz

#include <iom16v.h>
#include <macros.h>

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

//TIMER1 initialize - prescale:1
// WGM: 1) PWM 8bit Phz correct, TOP=0x00FF
// desired value: 2KHz
// actual value:  1.961KHz (2.0%)
void timer1_init(void)
{
 TCCR1B = 0x00; //stop
 TCNT1H = 0xFF; //setup
 TCNT1L = 0x01;
 OCR1AH = 0x00;
 OCR1AL = 0xFF;
 OCR1BH = 0x00;
 OCR1BL = 0xFF;
// OCR1CH = 0xc3;
// OCR1CL = 0x50;
 ICR1H  = 0x00;
 ICR1L  = 0xFF;
 TCCR1A = 0xC1;
 TCCR1B = 0x01; //start Timer
}

//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();

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

//
void main(void)
{
 init_devices();
 //insert your functional code here...
}