Mercurial > hg > index.fcgi > lj > lj046
annotate src/dssleep.c @ 3:17286938e22a
change DS alt. rotate key to rotate twice
| author | paulo@localhost |
|---|---|
| date | Wed, 08 Apr 2009 21:50:13 -0700 |
| parents | |
| children |
| rev | line source |
|---|---|
| paulo@0 | 1 #include <nds.h> |
| paulo@0 | 2 |
| paulo@0 | 3 /* |
| paulo@0 | 4 by Mighty Max and melw, |
| paulo@0 | 5 after http://forum.gbadev.org/viewtopic.php?t=12011 |
| paulo@0 | 6 */ |
| paulo@0 | 7 |
| paulo@0 | 8 int needLidSleep(void) { |
| paulo@0 | 9 // when reading keys |
| paulo@0 | 10 if (IPC->buttons & 0x0080) { |
| paulo@0 | 11 /* hinge is closed */ |
| paulo@0 | 12 |
| paulo@0 | 13 /* Step 1: Turn off all interrupts but vblank for waking up */ |
| paulo@0 | 14 unsigned long oldIE = REG_IE; |
| paulo@0 | 15 REG_IE = IRQ_VBLANK; |
| paulo@0 | 16 |
| paulo@0 | 17 /* Step 2: Power off most of the system */ |
| paulo@0 | 18 powerOFF(POWER_LCD); |
| paulo@0 | 19 |
| paulo@0 | 20 /* Step 3: Wait one vblank at a time until the ARM7 tells us |
| paulo@0 | 21 that the lid is no longer closed */ |
| paulo@0 | 22 while (IPC->buttons & 0x0080) { |
| paulo@0 | 23 swiWaitForVBlank(); |
| paulo@0 | 24 } |
| paulo@0 | 25 |
| paulo@0 | 26 /* Step 4: Wait a bit more (necessary?) */ |
| paulo@0 | 27 swiWaitForVBlank(); |
| paulo@0 | 28 |
| paulo@0 | 29 /* Step 5: Restore old machine state */ |
| paulo@0 | 30 powerON(POWER_LCD); |
| paulo@0 | 31 REG_IE = oldIE; |
| paulo@0 | 32 return 1; |
| paulo@0 | 33 } |
| paulo@0 | 34 return 0; |
| paulo@0 | 35 } |