firmware/main.c

   1 #include <avr/io.h>
   2 #include <util/delay.h>
   3 #include <avr/sleep.h>
   4 #include <avr/interrupt.h>
   5 #include <avr/power.h>
   6 #include <avr/wdt.h>
   7
   8 #include "lights.h"
   9
  10 void hw_setup()
  11 {
  12         wdt_enable(WDTO_1S);
  13         init_battery();
  14         init_pwm();
  15         init_adc();
  16         init_tmr();
  17         init_buttons();
  18
  19         pwmled_init();
  20         gpio_init();
  21         ambient_init();
  22         pattern_init();
  23
  24         set_sleep_mode(SLEEP_MODE_IDLE);
  25 }
  26
  27 void hw_suspend()
  28 {
  29         susp_pwm();
  30         susp_adc();
  31         susp_tmr();
  32         susp_gpio();
  33         wdt_disable();
  34 }
  35
  36
  37 void power_down()
  38 {
  39         uint16_t wake_count = 0;
  40         unsigned char btn;
  41
  42 sleep_again:
  43         // enable PCINT14, so that user can wake up later
  44         GIMSK |= _BV(PCIE1);
  45         PCMSK1 |= _BV(PCINT14);
  46
  47         // G'night
  48         set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  49         sleep_enable();
  50         sleep_bod_disable();
  51         sei();
  52         sleep_cpu();
  53
  54         // G'morning
  55         cli();
  56
  57         sleep_disable();
  58
  59         // Disable PCINT14
  60         GIMSK &= ~_BV(PCIE1);
  61         PCMSK1 &= ~_BV(PCINT14);
  62
  63         // allow wakeup by long button-press only
  64         for (btn = 0; btn < 5; btn++) {
  65                 if ((PINB & _BV(PB6)) != 0) {
  66                         wake_count++;
  67                         goto sleep_again;;
  68                 }
  69                 _delay_ms(100);
  70         }
  71
  72         // ok, so I will wake up
  73         log_byte(0xb1);
  74         log_word(wake_count);
  75         log_flush();
  76
  77         hw_setup();
  78 }
  79
  80
  81 ISR(PCINT_vect)
  82 {
  83         GIMSK &= ~_BV(PCIE1);
  84         PCMSK1 &= ~_BV(PCINT14);
  85 }
  86
  87 int main(void)
  88 {
  89         log_init();
  90         power_usi_disable(); // Once for lifetime
  91
  92         log_set_state(3);
  93
  94         hw_setup();
  95         hw_suspend();
  96         power_down();
  97
  98         sei();
  99 #if 1
 100         while (1) {
 101                 wdt_reset();
 102                 sleep_mode();
 103         }
 104 #endif
 105
 106 #if 0
 107         DDRB |= _BV(PB2);
 108         while (1) {
 109                 PORTB |=  _BV( PB2 );
 110                 _delay_ms(200);
 111                 PORTB &=~ _BV( PB2 );
 112                 _delay_ms(200);
 113         }
 114 #endif
 115 }