ATMEGA 128單片機(jī)定時(shí)器應(yīng)用大全

1、#include <iom128v.h>#include <macros.h>#include"delay.h"#include"usart.h"unsigned char Count1 = 0;unsigned char Count2 = 0;unsigned char count = 0;void port_init(void) PORTA = 0x00; DDRA = 0xFF; PORTB = 0x00; DDRB = 0xFF; PORTC = 0x00; /m103 output only DDRC = 0xFF; P

2、ORTD = 0x00; DDRD = 0x00; PORTE = 0x00; DDRE = 0xFF; PORTF = 0x00; DDRF = 0x00; PORTG = 0x00; DDRG = 0x00;/call this routine to initialize all peripheralsvoid init_devices(void) /stop errant interrupts until set up CLI(); /disable all interrupts XDIV = 0x00; /xtal divider XMCRA = 0x00; /external mem

3、ory port_init(); /uart0_init(); MCUCR = 0x00; EICRA = 0x00; /extended ext ints EICRB = 0x00; /extended ext ints EIMSK = 0x00; TIMSK = 0x00; /timer interrupt sources ETIMSK = 0x00; /extended timer interrupt sources SEI(); /re-enable interrupts /all peripherals are now initialized/void PWM10(void) /*在

4、10位相位修正PWM模式下，產(chǎn)生PWM波*/ /TCCR1A = 0X83;TCCR1A = (1<<COM1A1)|(1<<COM1B1)|(1<<COM1C1)|(1<<WGM11)|(1<<WGM10);TCCR1B = (1<<CS10);/|(1<<WGM13)|(1<<WGM12);/沒(méi)有預(yù)分頻OCR1AH = 0X0F;OCR1AL = 0X01;OCR1BH = 0X1F;OCR1BL = 0X01; OCR1CH = 0X2A;OCR1CL = 0X01;void PWM20MS_

5、Servo(void) /舵機(jī)常用 /top值為ICRn時(shí)產(chǎn)生PWM TCCR1A = (1<<COM1A1)|(1<<COM1B1)|(1<<COM1C1)|(1<<WGM11);TCCR1B = (1<<CS11)|(1<<WGM13);/8分頻，相位修正ICR1 = 18432;/周期為20MS/ICR1H = 0X48;/周期為20MS/ICR1L = 0X00;OCR1A = 360;/OCR1AL = 0XCC;/OCR1B = 2300;/OCR1BL = 0XFC; OCR1CH = 0X1A;OCR1CL

6、 = 0X01;void PWM_T1_0XFF(void) /兩路PWM波 TCCR1A =(1<<COM1A1)|(1<<COM1B1)|(1<<COM1C1)|(1<<WGM10);TCCR1B = (1<<CS11);/|(1<<WGM13);/8分頻，相位修正OCR1A = 200;OCR1B = 22; OCR1C = 100;void PWM_T3_0XFF(void) /兩路PWM波 TCCR3A =(1<<COM3A1)|(1<<COM3B1)|(1<<COM3C1)|

7、(1<<WGM30);TCCR3B = (1<<CS31);/|(1<<WGM13);/8分頻，相位修正OCR3A = 200;OCR3B = 22; OCR3C = 100;void InPut_Init(void) DDRD &= (1<<4); PORTD |= (1<<4); SREG = 0X80; TCNT1 = 0; TCCR1B = (1<<ICNC1)|(1<<CS11);/(1<<ICES1)|下降沿觸發(fā)/ICES1輸入捕捉觸發(fā)沿選擇位，CS11 8分頻 TIMSK =

8、(1<<TICIE1);/對(duì)16位的存放器寫(xiě)值void Write_r16Register(unsigned int k) TCNT1H = (unsigned char)(k>>8); TCNT1L = (unsigned char)k;/對(duì)16位的存放器讀值unsigned int Read_r16Register(void) unsigned int k; k = TCNT1L; k += (unsigned int)(TCNT1H<<8); return k;/CTC模式，外部計(jì)數(shù)void CTC_Init_T1(void) DDRD &=

9、(1<<6); PORTD |= (1<<6); TCCR1A = 0X00; TCCR1B = (1<<WGM12)|(1<<CS12)|(1<<CS11);/|(1<<CS10);/下降沿驅(qū)動(dòng)|(1<<CS10); TCNT1H = 0; TCNT1L = 0; OCR1AH = 0XFF; OCR1AL = 0XFF; /0X0005; / TIMSK = (1<<OCIE1A); /SREG = 0X80;/CTC模式，T2，外部計(jì)數(shù)void CTC_Init_T2(void) DDRD &

10、amp;= (1<<7); PORTD |= (1<<7); TCCR2 = (1 << WGM21)|(1 << CS22)|(1 << CS21); TCNT2 = 0X00; OCR2 = 0XFF;void T3_Over_init(void) /TCNT3H=(65536-50000)/256;/50ms溢出中斷 /TCNT3L=(65536-50000)%256; TCNT3H = 0X1E; TCNT3L = 0XFF;/0XEA; /TCNT3L=0;/X8C; TCCR3B=0X04;/(1<<CS32)

11、|(1<<CS30);/0x02;/8分頻，8MHz晶振，1us cs101 1024分頻 ETIMSK = (1<<TOIE3); SREG=0x80; /定時(shí)器0，溢出中斷，初始化void T0_Over_Init(void) TCNT0 = 0x0F; TCCR0 = 0X07; TIMSK = (1 << TOIE0); SREG=0x80;/使用外部中斷，下降沿觸發(fā)，中斷0，1void External_Interrupt_Init(void) DDRD &= (1<<0); PORTD |= (1<<0);DDRD

12、 &= (1<<1); PORTD |= (1<<1); EICRA = (1<<ISC11)|(1<<ISC01); EIMSK = (1<<INT1)|(1<<INT0); SREG=0x80;/計(jì)算電機(jī)編碼器的值，通過(guò)定時(shí)器0，讀取T1做時(shí)鐘，TCNT1的值void main(void) init_devices(); /External_Interrupt_Init(); T0_Over_Init(); /T3_Over_init(); /CTC_Init_T1(); /CTC_Init_T2(); PWM

13、_T1_0XFF(); PWM_T3_0XFF(); /uart0_init(); while(1) /uart0_init(); /PORTA = PORTA0X01; / DelayMs(5); /外部中斷函數(shù)0#pragma interrupt_handler INT0_Interrupt:02void INT0_Interrupt(void) Count1+; PORTA = PORTA0X01;#pragma interrupt_handler INT1_Interrupt:03void INT1_Interrupt(void) Count2+; PORTA = PORTA0X01;

14、/T0溢出中斷函數(shù)#pragma #pragma interrupt_handler T0_Over_Interrupt:17void T0_Over_Interrupt(void) TCNT0 = 0x0F; count+; if(count=60) count = 0; PORTA = PORTA0X01; / USART0_Transmit(TCNT1H); / USART0_Transmit(TCNT1L); / TCNT1H = 0; / TCNT1L = 0;/T3溢出中斷函數(shù)#pragma interrupt_handler T3_Over_Interrupt:30void T3

15、_Over_Interrupt(void) TCNT3H = 0X1E; TCNT3L = 0XFF; /DelayMs(30); USART0_Transmit(Count1); USART0_Transmit(Count2); Count1 = 0; Count2 = 0; /TCNT1H = 0; /TCNT1L = 0; /USART0_Transmit(TCNT2); /TCNT2 = 0; /PORTA = PORTA0X01; /CTC#pragma interrupt_handler T1:13void T1(void) USART0_Transmit(TCNT1L); PORTA = 0X0F; /PORTA0X01;/捕捉中斷，向量編號(hào)12#pragma interrupt_handler input1:12void