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 static 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 static 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         hw_suspend();
  43 sleep_again:
  44         // enable PCINT14, so that user can wake up later
  45         GIMSK |= _BV(PCIE1);
  46         PCMSK1 |= _BV(PCINT14);
  47
  48         // G'night
  49         set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  50         sleep_enable();
  51         sleep_bod_disable();
  52         sei();
  53         sleep_cpu();
  54
  55         // G'morning
  56         cli();
  57
  58         sleep_disable();
  59
  60         // Disable PCINT14
  61         GIMSK &= ~_BV(PCIE1);
  62         PCMSK1 &= ~_BV(PCINT14);
  63
  64         // allow wakeup by long button-press only
  65         for (btn = 0; btn < 5; btn++) {
  66                 if ((PINB & _BV(PB6)) != 0) {
  67                         wake_count++;
  68                         goto sleep_again;;
  69                 }
  70                 _delay_ms(100);
  71         }
  72
  73         // ok, so I will wake up
  74         log_byte(0xb1);
  75         log_word(wake_count);
  76         log_flush();
  77
  78         hw_setup();
  79 }
  80
  81
  82 ISR(PCINT_vect)
  83 {
  84         GIMSK &= ~_BV(PCIE1);
  85         PCMSK1 &= ~_BV(PCINT14);
  86 }
  87
  88 int main(void)
  89 {
  90         log_init();
  91
  92         power_usi_disable(); // Once for lifetime
  93         ACSRA |= _BV(ACD);   // disable analog comparator
  94
  95         log_set_state(3);
  96
  97         hw_setup();
  98         power_down();
  99
 100         sei();
 101 #if 1
 102         while (1) {
 103                 wdt_reset();
 104                 sleep_mode();
 105         }
 106 #endif
 107
 108 #if 0
 109         DDRB |= _BV(PB2);
 110         while (1) {
 111                 PORTB |=  _BV( PB2 );
 112                 _delay_ms(200);
 113                 PORTB &=~ _BV( PB2 );
 114                 _delay_ms(200);
 115         }
 116 #endif
 117 }