lws-button.h

/*
 * Generic button ops
 *
 * Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Leverages the lws generic gpio pieces to bind gpio buttons to smd events
 */
 
#if !defined(__LWS_BUTTON_H__)
#define __LWS_BUTTON_H__
 
typedef uint16_t lws_button_idx_t;
 
/* actual minimum may be 1 x RTOS tick depending on platform */
#define LWS_BUTTON_MON_TIMER_MS 5
 
typedef void (*lws_button_cb_t)(void *opaque, lws_button_idx_t idx, int state);
 
/* These are specified in ms but the granularity is LWS_BUTTON_MON_TIMER_MS,
 * which may have been rounded up to an RTOS tick depending on platform */
 
enum {
        LWSBTNRGMFLAG_CLASSIFY_DOUBLECLICK = (1 << 0)
};
 
typedef struct lws_button_regime {
        uint16_t                        ms_min_down;
        uint16_t                        ms_min_down_longpress;
        uint16_t                        ms_up_settle;
        uint16_t                        ms_doubleclick_grace;
        uint16_t                        ms_repeat_down;
        uint8_t                         flags;
} lws_button_regime_t;
 
/*
 * This is the const part of the button controller, describing the static
 * bindings to gpio, and lws_smd event name information
 */
 
typedef struct lws_button_map {
        _lws_plat_gpio_t                gpio;
        const char                      *smd_interaction_name;
        const lws_button_regime_t       *regime;
} lws_button_map_t;
 
typedef struct lws_button_controller {
        const char                      *smd_bc_name;
        const lws_gpio_ops_t            *gpio_ops;
        const lws_button_map_t          *button_map;
        lws_button_idx_t                active_state_bitmap;
        uint8_t                         count_buttons;
} lws_button_controller_t;
 
struct lws_button_state; /* opaque */
 
LWS_VISIBLE LWS_EXTERN struct lws_button_state *
lws_button_controller_create(struct lws_context *ctx,
                             const lws_button_controller_t *controller);
 
LWS_VISIBLE LWS_EXTERN void
lws_button_controller_destroy(struct lws_button_state *bcs);
 
 
LWS_VISIBLE LWS_EXTERN lws_button_idx_t
lws_button_get_bit(struct lws_button_state *bcs, const char *name);
 
/*
 * lws_button_enable() - enable and disable buttons
 */
 
LWS_VISIBLE LWS_EXTERN void
lws_button_enable(struct lws_button_state *bcs,
                  lws_button_idx_t _reset, lws_button_idx_t _set);
 
#endif