buttons.c

   1 #include <avr/io.h>
   2 #include <avr/interrupt.h>
   3
   4 #include "lights.h"
   5
   6 static uint16_t button_start[N_BUTTONS];
   7 static unsigned char button_pressed[N_BUTTONS];
   8
   9 void init_buttons()
  10 {
  11         // MCUCR |= _BV(ISC00); // any edge generates IRQ
  12         // GIMSK |= _BV(INT0); // enable INT0
  13         DDRB &= ~(_BV(PB6) | _BV(PB0));
  14         PORTB |= _BV(PB6) | _BV(PB0);
  15
  16         // log_byte(PORTB);
  17 }
  18
  19 extern unsigned char led1_counter;
  20
  21 void timer_check_buttons()
  22 {
  23         unsigned char pinb = PINB;
  24         unsigned char i;
  25         unsigned char port_states[N_BUTTONS] = {
  26                 pinb & _BV(PB6),
  27                 pinb & _BV(PB0),
  28         };
  29         for (i = 0; i < N_BUTTONS; i++) {
  30                 if (!port_states[i]) { // is pressed
  31                         if (button_pressed[i]) { // been already pressed
  32                                 // TODO long button press
  33                                 /*
  34                                 uint16_t duration = jiffies - button_start[i];
  35                                 if (duration > 10 && duration < 40) {
  36                                         gpio_set(GPIO_LED2, 1);
  37                                 }
  38                                 */
  39                         } else { // begin of button press
  40                                 button_pressed[i] = 1;
  41                                 button_start[i] = jiffies;
  42                                 // log_byte(0xC0);
  43                                 // log_word(jiffies);
  44                         }
  45                 } else { // is not pressed
  46                         if (button_pressed[i]) { // just depressed
  47                                 uint16_t duration = jiffies - button_start[i];
  48                                 log_byte(0xC1);
  49                                 log_word(duration);
  50                                 log_flush();
  51                                 // led_set_number_pattern(N_PWMLEDS, 1 + (duration >> 3));
  52                                 button_pressed[i] = 0;
  53                         }
  54                 }
  55
  56                 break; // FIXME - delete this when btn1 is ready
  57         }
  58 }
  59
  60 #if 0
  61 ISR(INT0_vect)
  62 {
  63         unsigned char tmpval = PINB & _BV(PB6);
  64
  65         gpio_set(GPIO_LED2, tmpval);
  66         log_byte(0xbb);
  67         log_flush();
  68 }
  69 #endif
  70