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