98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/* Copyright 2022
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include "gpio.h"
|
|
|
|
#ifndef JOYSTICK_BUTTON_COUNT
|
|
# define JOYSTICK_BUTTON_COUNT 8
|
|
#elif JOYSTICK_BUTTON_COUNT > 32
|
|
# error Joystick feature only supports up to 32 buttons
|
|
#endif
|
|
|
|
#ifndef JOYSTICK_AXES_COUNT
|
|
# define JOYSTICK_AXES_COUNT 4
|
|
#elif JOYSTICK_AXES_COUNT > 6
|
|
# error Joystick feature only supports up to 6 axes
|
|
#endif
|
|
|
|
#if JOYSTICK_AXES_COUNT == 0 && JOYSTICK_BUTTON_COUNT == 0
|
|
# error Joystick feature requires at least one axis or button
|
|
#endif
|
|
|
|
#ifndef JOYSTICK_AXES_RESOLUTION
|
|
# define JOYSTICK_AXES_RESOLUTION 8
|
|
#elif JOYSTICK_AXES_RESOLUTION < 8 || JOYSTICK_AXES_RESOLUTION > 16
|
|
# error JOYSTICK_AXES_RESOLUTION must be between 8 and 16
|
|
#endif
|
|
|
|
#define JOYSTICK_RESOLUTION ((1L << (JOYSTICK_AXES_RESOLUTION - 1)) - 1)
|
|
|
|
// configure on input_pin of the joystick_axes array entry to JS_VIRTUAL_AXIS
|
|
// to prevent it from being read from the ADC. This allows outputing forged axis value.
|
|
//
|
|
#define JS_VIRTUAL_AXIS 0xFF
|
|
|
|
#define JOYSTICK_AXIS_VIRTUAL \
|
|
{ JS_VIRTUAL_AXIS, JS_VIRTUAL_AXIS, JS_VIRTUAL_AXIS, 0, 1023 }
|
|
#define JOYSTICK_AXIS_IN(INPUT_PIN, LOW, REST, HIGH) \
|
|
{ JS_VIRTUAL_AXIS, INPUT_PIN, JS_VIRTUAL_AXIS, LOW, REST, HIGH }
|
|
#define JOYSTICK_AXIS_IN_OUT(INPUT_PIN, OUTPUT_PIN, LOW, REST, HIGH) \
|
|
{ OUTPUT_PIN, INPUT_PIN, JS_VIRTUAL_AXIS, LOW, REST, HIGH }
|
|
#define JOYSTICK_AXIS_IN_OUT_GROUND(INPUT_PIN, OUTPUT_PIN, GROUND_PIN, LOW, REST, HIGH) \
|
|
{ OUTPUT_PIN, INPUT_PIN, GROUND_PIN, LOW, REST, HIGH }
|
|
|
|
typedef struct {
|
|
pin_t output_pin;
|
|
pin_t input_pin;
|
|
pin_t ground_pin;
|
|
|
|
// the AVR ADC offers 10 bit precision, with significant bits on the higher part
|
|
uint16_t min_digit;
|
|
uint16_t mid_digit;
|
|
uint16_t max_digit;
|
|
} joystick_config_t;
|
|
|
|
extern joystick_config_t joystick_axes[JOYSTICK_AXES_COUNT];
|
|
|
|
enum joystick_status {
|
|
JS_INITIALIZED = 1,
|
|
JS_UPDATED,
|
|
};
|
|
|
|
typedef struct {
|
|
uint8_t buttons[(JOYSTICK_BUTTON_COUNT - 1) / 8 + 1];
|
|
|
|
int16_t axes[JOYSTICK_AXES_COUNT];
|
|
uint8_t status : 2;
|
|
} joystick_t;
|
|
|
|
extern joystick_t joystick_status;
|
|
|
|
void joystick_task(void);
|
|
void joystick_flush(void);
|
|
|
|
void register_joystick_button(uint8_t button);
|
|
void unregister_joystick_button(uint8_t button);
|
|
|
|
int16_t joystick_read_axis(uint8_t axis);
|
|
void joystick_read_axes(void);
|
|
void joystick_set_axis(uint8_t axis, int16_t value);
|
|
|
|
void host_joystick_send(joystick_t *joystick);
|