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// Target : M16
// Crystal: 8.0000Mhz
//TIMER1 initialize - prescale:64
// WGM: 10) PWM phz correct, TOP= ICRn
// desired value: 1Hz
// actual value: 1.000Hz (0.0%)
#include
#include
#define PWM1APORTD5 //OC1A PD5
#define PWM1BPORTD4 //OC1B PD4
unsigned char OCAH;
unsigned char OCAL;
unsigned char OCBH;
unsigned char OCBL;
void timer1_init(void)
{
TCCR1B = 0x00;//stop
TCNT1H = 0x00;//setup
TCNT1L = 0x01;
OCR1AH = OCAH;
OCR1AL = OCAL;
OCR1BH = OCBH;
OCR1BL = OCBL;
ICR1H = 0xff;// pwm 的计数顶值
ICR1L = 0xFF;
TCCR1A = 0xA3;// 匹配清零 top置位
TCCR1B = 0x0B;// start Timer
}
void init_devices(unsigned char valueah,unsigned char valueal,unsigned char valuebh,unsigned char valuebl)
{
OCAH=valueah;
OCAL=valueal;
OCBH=valuebh;
OCBL=valuebl;
CLI();
//disable all interrupts
timer1_init();
MCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x04;//timer interrupt sources
SEI();//re-enable interrupts
}
void main(void)
{
PORTD&=(0<//修改实参即可改变占空比,最大值为0X0FFF;
while(1);
}
// Crystal: 8.0000Mhz
//TIMER1 initialize - prescale:64
// WGM: 10) PWM phz correct, TOP= ICRn
// desired value: 1Hz
// actual value: 1.000Hz (0.0%)
#include
#include
#define PWM1A
#define PWM1B
unsigned char OCAH;
unsigned char OCAL;
unsigned char OCBH;
unsigned char OCBL;
void timer1_init(void)
{
TCCR1B = 0x00;
TCNT1H = 0x00;
TCNT1L = 0x01;
OCR1AH = OCAH;
OCR1AL = OCAL;
OCR1BH = OCBH;
OCR1BL = OCBL;
ICR1H = 0xff;
ICR1L = 0xFF;
TCCR1A = 0xA3;
TCCR1B = 0x0B;
}
void init_devices(unsigned char valueah,unsigned char valueal,unsigned char valuebh,unsigned char valuebl)
{
OCAH=valueah;
OCAL=valueal;
OCBH=valuebh;
OCBL=valuebl;
CLI();
timer1_init();
MCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x04;
SEI();
}
void main(void)
{
PORTD&=(0<
while(1);
}
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