gba-trycatch
annotate src/main.c @ 11:c47e54796b82
added a simple README
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 22 Jun 2014 07:54:29 +0300 |
| parents | b0ed38f13261 |
| children |
| rev | line source |
|---|---|
| nuclear@5 | 1 #include "config.h" |
| nuclear@4 | 2 #include <math.h> |
| nuclear@2 | 3 #include <stdint.h> |
| nuclear@0 | 4 #include "gbasys.h" |
| nuclear@1 | 5 #include "logger.h" |
| nuclear@2 | 6 #include "sincos.h" |
| nuclear@5 | 7 #include "game.h" |
| nuclear@2 | 8 |
| nuclear@1 | 9 static void keyb_intr(void); |
| nuclear@0 | 10 |
| nuclear@1 | 11 static unsigned short keystate; |
| nuclear@1 | 12 |
| nuclear@1 | 13 #define EVQ_SIZE 8 |
| nuclear@1 | 14 volatile static unsigned short evhead, evtail; |
| nuclear@1 | 15 static unsigned short events[EVQ_SIZE]; |
| nuclear@0 | 16 |
| nuclear@0 | 17 int main(void) |
| nuclear@0 | 18 { |
| nuclear@0 | 19 gba_init(); |
| nuclear@2 | 20 |
| nuclear@1 | 21 interrupt(INTR_KEY, keyb_intr); |
| nuclear@0 | 22 |
| nuclear@9 | 23 set_video_mode(GFX_MODE, 1); |
| nuclear@10 | 24 set_bg_scale(171, 206); |
| nuclear@0 | 25 |
| nuclear@0 | 26 clear_buffer(front_buffer, 0); |
| nuclear@1 | 27 set_text_writebg(1); |
| nuclear@1 | 28 logmsg(LOG_ALL, "please wait...\n"); |
| nuclear@0 | 29 |
| nuclear@8 | 30 if(game_init() == -1) { |
| nuclear@8 | 31 return 1; |
| nuclear@8 | 32 } |
| nuclear@2 | 33 |
| nuclear@0 | 34 for(;;) { |
| nuclear@1 | 35 /* process events */ |
| nuclear@1 | 36 while(evhead != evtail) { |
| nuclear@1 | 37 unsigned short ev = events[evhead]; |
| nuclear@1 | 38 evhead = (evhead + 1) % EVQ_SIZE; |
| nuclear@5 | 39 game_keyb(ev, 1); |
| nuclear@1 | 40 } |
| nuclear@2 | 41 |
| nuclear@2 | 42 /* this is needed because there's no key release interrupt (!) */ |
| nuclear@2 | 43 keystate = get_key_state(KEY_ALL); |
| nuclear@2 | 44 |
| nuclear@5 | 45 game_draw(); |
| nuclear@0 | 46 } |
| nuclear@0 | 47 return 0; |
| nuclear@0 | 48 } |
| nuclear@0 | 49 |
| nuclear@1 | 50 static void keyb_intr(void) |
| nuclear@1 | 51 { |
| nuclear@1 | 52 int i; |
| nuclear@1 | 53 unsigned short prev_keystate = keystate; |
| nuclear@1 | 54 unsigned short diff; |
| nuclear@1 | 55 keystate = get_key_state(KEY_ALL); |
| nuclear@1 | 56 diff = keystate ^ prev_keystate; |
| nuclear@1 | 57 |
| nuclear@1 | 58 for(i=0; i<32; i++) { |
| nuclear@1 | 59 int key = 1 << i; |
| nuclear@1 | 60 |
| nuclear@1 | 61 if(diff & key) { |
| nuclear@1 | 62 events[evtail] = key; |
| nuclear@1 | 63 evtail = (evtail + 1) % EVQ_SIZE; |
| nuclear@1 | 64 } |
| nuclear@1 | 65 } |
| nuclear@1 | 66 } |