badge/ui/event.c

   1 #include "event.h"
   2
   3 #include <core/gpio/gpio.h>
   4 #include <core/timer32/timer32.h>
   5
   6 #ifdef R0KET
   7 #include <r0ketports.h>
   8 #else
   9 #include <badge/pinconfig.h>
  10 #endif
  11
  12 // We depend on input being popped often, so no queue.
  13 static badge_event_t volatile event_buffer;
  14 static uint8_t       volatile event_flag;
  15
  16 enum {
  17   BADGE_EVENT_FLAG_INPUT = 1,
  18   BADGE_EVENT_FLAG_TIMER = 2
  19 };
  20
  21 static uint8_t badge_input_raw(void) {
  22   uint8_t result = 0;
  23
  24 #ifdef R0KET
  25   if (gpioGetValue(RB_BTN3) == 0) { result |= BADGE_EVENT_KEY_UP    ; }
  26   if (gpioGetValue(RB_BTN2) == 0) { result |= BADGE_EVENT_KEY_DOWN  ; }
  27   if (gpioGetValue(RB_BTN4) == 0) { result |= BADGE_EVENT_KEY_CENTER; }
  28   if (gpioGetValue(RB_BTN0) == 0) { result |= BADGE_EVENT_KEY_LEFT  ; }
  29   if (gpioGetValue(RB_BTN1) == 0) { result |= BADGE_EVENT_KEY_RIGHT ; }
  30   if (gpioGetValue(RB_HB0 ) == 0) { result |= BADGE_EVENT_KEY_BTN_A ; }
  31   if (gpioGetValue(RB_HB1 ) == 0) { result |= BADGE_EVENT_KEY_BTN_B ; }
  32 #else
  33   if (gpioGetValue(HOB_PORT(HOB_BTN_UP    ), HOB_PIN(HOB_BTN_UP    )) == 1) { result |= BADGE_EVENT_KEY_UP    ; }
  34   if (gpioGetValue(HOB_PORT(HOB_BTN_DOWN  ), HOB_PIN(HOB_BTN_DOWN  )) == 1) { result |= BADGE_EVENT_KEY_DOWN  ; }
  35   if (gpioGetValue(HOB_PORT(HOB_BTN_CENTER), HOB_PIN(HOB_BTN_CENTER)) == 1) { result |= BADGE_EVENT_KEY_CENTER; }
  36   if (gpioGetValue(HOB_PORT(HOB_BTN_LEFT  ), HOB_PIN(HOB_BTN_LEFT  )) == 1) { result |= BADGE_EVENT_KEY_LEFT  ; }
  37   if (gpioGetValue(HOB_PORT(HOB_BTN_RIGHT ), HOB_PIN(HOB_BTN_RIGHT )) == 1) { result |= BADGE_EVENT_KEY_RIGHT ; }
  38   if (gpioGetValue(HOB_PORT(HOB_BTN_A     ), HOB_PIN(HOB_BTN_A     )) == 1) { result |= BADGE_EVENT_KEY_BTN_A ; }
  39   if (gpioGetValue(HOB_PORT(HOB_BTN_B     ), HOB_PIN(HOB_BTN_B     )) == 1) { result |= BADGE_EVENT_KEY_BTN_B ; }
  40 #endif
  41
  42   return result;
  43 }
  44
  45 uint8_t badge_event_current_input_state(void) {
  46   return badge_event_new_input_state(event_buffer);
  47 }
  48
  49 void badge_event_irq(void) {
  50   uint8_t old_state = badge_event_current_input_state();
  51   uint8_t new_state = badge_input_raw();
  52
  53   if(new_state != old_state) {
  54     event_buffer = badge_event_new(BADGE_EVENT_USER_INPUT,
  55                                    old_state,
  56                                    new_state);
  57     event_flag |= BADGE_EVENT_FLAG_INPUT;
  58   }
  59
  60   event_flag |= BADGE_EVENT_FLAG_TIMER;
  61 }
  62
  63 badge_event_t badge_event_wait(void) {
  64   while(!event_flag)
  65     ;
  66
  67   // User input takes precedence.
  68   if(event_flag & BADGE_EVENT_FLAG_INPUT) {
  69     badge_event_t event = event_buffer;
  70     event_flag &= ~BADGE_EVENT_FLAG_INPUT;
  71     return event;
  72   }
  73
  74   uint8_t state = badge_event_current_input_state();
  75   event_flag &= ~BADGE_EVENT_FLAG_TIMER;
  76   return badge_event_new(BADGE_EVENT_GAME_TICK, state, state);
  77 }
  78
  79 void badge_event_start(void) {
  80   timer32Init(0, TIMER32_CCLK_10MS * 2);
  81   timer32SetIntHandler(badge_event_irq);
  82   timer32Enable(0);
  83 }