lline/old/timer.c

   1 #include "defines.h"
   2
   3 #include <stdio.h>
   4
   5 #include <avr/io.h>
   6 #include <avr/interrupt.h>
   7 #include <avr/pgmspace.h>
   8 #include <avr/power.h>
   9
  10 #include <util/atomic.h>
  11
  12 #include "timer.h"
  13
  14 static void timer0_init(void) { // 8, PWM
  15         fprintf_P(stderr,PSTR("\ntimers: init: timer0"));
  16         power_timer0_enable();
  17
  18         // Diable Timer
  19         TCCR1B&= (uint8_t)~((1<<CS12)|(1<<CS11)|(1<<CS10));
  20
  21         DDRB|=(1<<3)|(1<<4);
  22
  23         // Pin ctrl
  24         //TCCR0A&=~((1<<COM0A1)|(1<<COM0A0)|(1<<COM0B1)|(1<<COM0B0));
  25         TCCR0A|=(1<<COM0A1)|(1<<COM0B1);TCCR0A&=(uint8_t)~((1<<COM0A0)|(1<<COM0B0));
  26
  27
  28         // Mode 2, CTC.
  29         //TCCR0B&=(uint8_t)~    (1<<WGM02);
  30         //TCCR0A|=              (1<<WGM01);
  31         //TCCR0A&=(uint8_t)~    (1<<WGM00);
  32
  33         // Mode 1, PWM.
  34         TCCR0B&=(uint8_t)~      (1<<WGM02);
  35         TCCR0A&=(uint8_t)~      (1<<WGM01);
  36         TCCR0A|=                (1<<WGM00);
  37
  38         TCNT0=0;
  39         OCR0A=0;
  40         OCR0B=0;
  41
  42         // Interupts
  43         TIMSK0=(0<<OCIE0A)|(0<<OCIE0B);
  44
  45         // Clock Select and timer enable {disable,1,8,64,256,1024,ExFalling,ExRising}
  46         TCCR0B|=1;
  47
  48
  49         fprintf_P(stderr,PSTR("\t[done]"));
  50 }
  51
  52 static void timer1_init(void) { // 16, PWM
  53         fprintf_P(stderr,PSTR("\ntimers: init: timer1"));
  54         power_timer1_enable();
  55
  56         // Disable Timer
  57         TCCR1B&= (uint8_t)~((1<<CS12)|(1<<CS11)|(1<<CS10));
  58
  59         //       OC1A,    OC1B set to outputs
  60         DDRD|= (1<<5)|(1<<4);
  61
  62         // Pin Control
  63         TCCR1A|= (1<<COM1A1)|(1<<COM1B1);
  64         TCCR1A&= (uint8_t)~((1<<COM1A0)|(1<<COM1B0));
  65
  66         TCCR1B|= (1<<5); //Reserved bit
  67
  68         // Mode 8.
  69         TCCR1B|= (1<<WGM13);
  70         TCCR1B&= (uint8_t)~(1<<WGM12);
  71         TCCR1A&= (uint8_t)~((1<<WGM11)|(1<<WGM10));
  72
  73         // Mode 1.
  74         //TCCR1B&= (uint8_t)~((1<<WGM13)|(1<<WGM12));
  75         //TCCR1A&= (uint8_t)~(1<<WGM11);
  76         //TCCR1A|= (1<<WGM10);
  77
  78         // Input noise canceler (irrelavent in pwm mode 8?)
  79         //TCCR1B&= (uint8_t)~(1<<ICNC1);
  80
  81         // TOP (mode 8, mode 1 top = 0xFF)
  82         ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
  83                 ICR1=0xFFFF;
  84                 TCNT1=0;
  85                 OCR1A=0;
  86                 OCR1B=0;
  87         }
  88
  89         // Interupts
  90         TIMSK1=(0<<ICIE1)|(0<<OCIE1B)|(0<<OCIE1A)|(0<<TOIE1);
  91
  92         // Prescale and Enable.
  93         // 1
  94         //TCCR1B&= (uint8_t)~((1<<CS12)|(1<<CS11));
  95         TCCR1B|= (uint8_t) (1<<CS10);
  96
  97         fprintf_P(stderr,PSTR("\t[done]"));
  98 }
  99
 100
 101 void timer2_init(void) { // 8, RTC
 102         fprintf_P(stderr,PSTR("\ntimers: init: timer2"));
 103         power_timer2_enable();
 104
 105         // Disable Timer.
 106         TCCR2B&=(uint8_t)~((1<<CS22)|(1<<CS21)|(1<<CS20));
 107
 108         // Disable Pin outputs
 109         TCCR2A&=(uint8_t)~((1<<COM2A1)|(1<<COM2A0)|(1<<COM2B1)|(1<<COM2B0));
 110
 111         // Mode 2, CTC.
 112         TCCR2A|= (1<<WGM21);
 113         TCCR2A&=~(1<<WGM20);
 114         TCCR2B&=~(1<<WGM22);
 115
 116         // Enable OCR2A interupt
 117         TIMSK2=(1<<OCIE2A);
 118
 119         TCNT2=0;
 120         OCR2B=0;
 121
 122         // Clock Select
 123         //8000000/78/1024 == 100 HZ
 124         //8000000/125/64  == 1000 Hz
 125         #if     (T2HZ==100)
 126         OCR2A=78;
 127         TCCR2B|=(1<<CS22)|(1<<CS21)|(1<<CS20); //1024
 128         #elif   (T2HZ==1000)
 129         OCR2A=125;
 130         TCCR2B|=(1<<CS22);TCCR2B&=(uint8_t)~((1<<CS21)|(1<<CS20));//64
 131         #else
 132         #error Invalid Timer2 Frequency
 133         #endif
 134
 135         fprintf_P(stderr,PSTR("\t[done]"));
 136 }
 137
 138 ISR(TIMER2_COMPA_vect) {
 139         static uint16_t sec;//=0
 140         static uint8_t ct;
 141         ct++;
 142         if (ct>=100) {
 143                 ct=0;
 144                 ++sec;
 145                 fprintf(stderr,PSTR("\n[debug] tick"));
 146         }
 147 }
 148
 149
 150 void timers_init(void) {
 151         fprintf_P(stderr,PSTR("\ntimers: init:\tstart"));
 152
 153         //timer0_init(); //PWM 8
 154         //timer1_init(); //PWM 16
 155         timer2_init(); //RTC 8
 156
 157         fprintf_P(stderr,PSTR("\ntimers: init:\t[done]"));
 158 }