diff options
Diffstat (limited to 'gba/source/link.c')
| -rw-r--r-- | gba/source/link.c | 38 | 
1 files changed, 38 insertions, 0 deletions
| diff --git a/gba/source/link.c b/gba/source/link.c new file mode 100644 index 0000000..c84e44d --- /dev/null +++ b/gba/source/link.c | |||
| @@ -0,0 +1,38 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (C) 2017 hatkirby | ||
| 3 | * | ||
| 4 | * This software may be modified and distributed under the terms | ||
| 5 | * of the MIT license. See the LICENSE file for details. | ||
| 6 | */ | ||
| 7 | #include "link.h" | ||
| 8 | |||
| 9 | #define JOY_WRITE 2 | ||
| 10 | #define JOY_READ 4 | ||
| 11 | #define JOY_RW 6 | ||
| 12 | |||
| 13 | void initializeLink() | ||
| 14 | { | ||
| 15 | REG_HS_CTRL |= JOY_RW; | ||
| 16 | REG_JOYTR = 0; | ||
| 17 | while ((REG_HS_CTRL & JOY_WRITE) == 0); | ||
| 18 | REG_HS_CTRL |= JOY_RW; | ||
| 19 | } | ||
| 20 | |||
| 21 | void waitForAck() | ||
| 22 | { | ||
| 23 | while ((REG_HS_CTRL & JOY_WRITE) == 0); | ||
| 24 | REG_HS_CTRL |= JOY_RW; | ||
| 25 | REG_JOYTR = 0; | ||
| 26 | while ((REG_HS_CTRL & JOY_WRITE) == 0); | ||
| 27 | REG_HS_CTRL |= JOY_RW; | ||
| 28 | } | ||
| 29 | |||
| 30 | void sendS32(s32 val) | ||
| 31 | { | ||
| 32 | REG_JOYTR = val; | ||
| 33 | } | ||
| 34 | |||
| 35 | void sendU32(u32 val) | ||
| 36 | { | ||
| 37 | REG_JOYTR = val; | ||
| 38 | } | ||
