cst816s.h

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/*
 * Copyright (C) 2020 Koen Zandberg
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#include <stdint.h>
 
#include "periph/i2c.h"
#include "periph/gpio.h"
 
#ifdef MODULE_TOUCH_DEV
#include "touch_dev.h"
#endif
 
#ifdef __cplusplus
extern "C" {
#endif

typedef void (*cst816s_irq_cb_t)(void *arg);

typedef enum {
    CST816S_TOUCH_DOWN      = 0,    
    CST816S_TOUCH_UP        = 1,    
    CST816S_TOUCH_CONTACT   = 2,    
} cst816s_touch_t;

typedef enum {
    CST816S_GESTURE_NONE            = 0x00, 
    CST816S_GESTURE_SLIDE_DOWN      = 0x01, 
    CST816S_GESTURE_SLIDE_UP        = 0x02, 
    CST816S_GESTURE_SLIDE_LEFT      = 0x03, 
    CST816S_GESTURE_SLIDE_RIGHT     = 0x04, 
    CST816S_GESTURE_SINGLE_CLICK    = 0x05, 
    CST816S_GESTURE_DOUBLE_CLICK    = 0x0b, 
    CST816S_GESTURE_LONG_PRESS      = 0x0c, 
} cst816s_gesture_t;

extern const char *cst816s_gesture_str[];

typedef struct {
    cst816s_gesture_t gesture;  
    cst816s_touch_t action;     
    uint16_t x;                 
    uint16_t y;                 
} cst816s_touch_data_t;

typedef struct {
    i2c_t i2c_dev;                      
    uint8_t i2c_addr;                   
    gpio_t irq;                         
    gpio_flank_t irq_flank;             
    gpio_t reset;                       
} cst816s_params_t;

typedef struct {
#ifdef MODULE_TOUCH_DEV
    touch_dev_t *dev;                   
#endif
    const cst816s_params_t *params;     
    cst816s_irq_cb_t cb;                
    void *cb_arg;                       
} cst816s_t;

enum {
    CST816S_OK      =  0,           
    CST816S_ERR_IRQ = -1,           
};

int cst816s_init(cst816s_t *dev, const cst816s_params_t *params,
                 cst816s_irq_cb_t cb, void *arg);

int cst816s_read(const cst816s_t *dev, cst816s_touch_data_t *data);
 
#ifdef __cplusplus
}
#endif