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Generic gamepad structure and USB gamepad

pull/5/head
Raphael Assenat 7 years ago
parent
commit
6e0dd383b3
  1. 86
      gamepads.h
  2. 76
      usbpad.c
  3. 8
      usbpad.h

86
gamepads.h

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#ifndef _gamepads_h__
#define _gamepads_h__
#define PAD_TYPE_NONE 0
#define PAD_TYPE_N64 4
#define PAD_TYPE_GAMECUBE 5
#define N64_RAW_SIZE 4
#define GC_RAW_SIZE 8
typedef struct _n64_pad_data {
unsigned char pad_type; // PAD_TYPE_N64
char x,y;
unsigned short buttons;
unsigned char raw_data[N64_RAW_SIZE];
} n64_pad_data;
#define N64_BTN_A 0x0001
#define N64_BTN_B 0x0002
#define N64_BTN_Z 0x0004
#define N64_BTN_START 0x0008
#define N64_BTN_DPAD_UP 0x0010
#define N64_BTN_DPAD_DOWN 0x0020
#define N64_BTN_DPAD_LEFT 0x0040
#define N64_BTN_DPAD_RIGHT 0x0080
#define N64_BTN_RSVD_LOW1 0x0100
#define N64_BTN_RSVD_LOW2 0x0200
#define N64_BTN_L 0x0400
#define N64_BTN_R 0x0800
#define N64_BTN_C_UP 0x1000
#define N64_BTN_C_DOWN 0x2000
#define N64_BTN_C_LEFT 0x4000
#define N64_BTN_C_RIGHT 0x8000
typedef struct _gc_pad_data {
unsigned char pad_type; // PAD_TYPE_GAMECUBE
char x,y,cx,cy,lt,rt;
unsigned short buttons;
unsigned char raw_data[GC_RAW_SIZE];
} gc_pad_data;
#define GC_BTN_RSVD0 0x0001
#define GC_BTN_RSVD1 0x0002
#define GC_BTN_RSVD2 0x0004
#define GC_BTN_START 0x0008
#define GC_BTN_Y 0x0010
#define GC_BTN_X 0x0020
#define GC_BTN_B 0x0040
#define GC_BTN_A 0x0080
#define GC_BTN_RSVD3 0x0100
#define GC_BTN_L 0x0200
#define GC_BTN_R 0x0400
#define GC_BTN_Z 0x0800
#define GC_BTN_DPAD_UP 0x1000
#define GC_BTN_DPAD_DOWN 0x2000
#define GC_BTN_DPAD_RIGHT 0x4000
#define GC_BTN_DPAD_LEFT 0x8000
#define GC_ALL_BUTTONS (GC_BTN_START|GC_BTN_Y|GC_BTN_X|GC_BTN_B|GC_BTN_A|GC_BTN_L|GC_BTN_R|GC_BTN_Z|GC_BTN_DPAD_UP|GC_BTN_DPAD_DOWN|GC_BTN_DPAD_RIGHT|GC_BTN_DPAD_LEFT)
typedef struct _gamepad_data {
union {
unsigned char pad_type; // PAD_TYPE_*
n64_pad_data n64;
gc_pad_data gc;
};
} gamepad_data;
typedef struct {
void (*init)(void);
char (*update)(void);
char (*changed)(void);
void (*getReport)(gamepad_data *dst);
void (*setVibration)(char enable);
char (*probe)(void); /* return true if found */
} Gamepad;
#endif // _gamepads_h__

76
usbpad.c

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#include <stdint.h>
#include "gamepads.h"
#include "usbpad.h"
#define REPORT_ID 1
#define REPORT_SIZE 15
void usbpad_init(void)
{
}
int usbpad_getReportSize(void)
{
return REPORT_SIZE;
}
static void buildReportFromGC(const gc_pad_data *gc_data, unsigned char dstbuf[REPORT_SIZE])
{
}
static void buildReportFromN64(const n64_pad_data *n64_data, unsigned char dstbuf[REPORT_SIZE])
{
int16_t xval, yval;
xval = n64_data->x;
yval = n64_data->y;
/* Force official range */
if (xval>80) xval = 80; else if (xval<-80) xval = -80;
if (yval>80) yval = 80; else if (yval<-80) yval = -80;
/* Scale -80 ... +80 to -16000 ... +16000 */
xval *= 200;
yval *= 200;
yval = -yval;
/* Unsign for HID report */
xval += 16000;
yval += 16000;
dstbuf[0] = REPORT_ID;
dstbuf[1] = ((uint8_t*)&xval)[0];
dstbuf[2] = ((uint8_t*)&xval)[1];
dstbuf[3] = ((uint8_t*)&yval)[0];
dstbuf[4] = ((uint8_t*)&yval)[1];
/* Inactive and centered axis */
dstbuf[5] = 0x80;
dstbuf[6] = 0x3e;
dstbuf[7] = 0x80;
dstbuf[8] = 0x3e;
dstbuf[9] = 0x80;
dstbuf[10] = 0x3e;
dstbuf[11] = 0x80;
dstbuf[12] = 0x3e;
/* TODO : Button mapping */
dstbuf[13] = n64_data->raw_data[0];
dstbuf[14] = n64_data->raw_data[1];
}
void usbpad_buildReport(const gamepad_data *pad_data, unsigned char dstbuf[REPORT_SIZE])
{
switch (pad_data->pad_type)
{
case PAD_TYPE_N64:
buildReportFromN64(&pad_data->n64, dstbuf);
break;
case PAD_TYPE_GAMECUBE:
buildReportFromGC(&pad_data->gc, dstbuf);
break;
}
}

8
usbpad.h

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#ifndef USBPAD_H__
#define USBPAD_H__
void usbpad_init(void);
int usbpad_getReportSize(void);
void usbpad_buildReport(const gamepad_data *pad_data, unsigned char *dstbuf);
#endif // USBPAD_H__
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