stmpe811.h

Go to the documentation of this file.

/*
 * Copyright (C) 2019 Inria
 *
 * 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 "saul.h"
#include "periph/gpio.h"
#if IS_USED(MODULE_STMPE811_SPI)
#include "periph/spi.h"
#else
#include "periph/i2c.h"
#endif
 
#ifdef MODULE_TOUCH_DEV
#include "touch_dev.h"
#endif
 
#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
    STMPE811_TOUCH_STATE_PRESSED,       
    STMPE811_TOUCH_STATE_RELEASED,      
} stmpe811_touch_state_t;

typedef enum {
    STMPE811_NO_CONV  = 0x00, 
    STMPE811_MIRROR_X = 0x01, 
    STMPE811_MIRROR_Y = 0x02, 
    STMPE811_SWAP_XY  = 0x04, 
} stmpe811_touch_conv_t;

typedef struct {
    uint16_t x;                         
    uint16_t y;                         
} stmpe811_touch_position_t;

typedef void (*stmpe811_event_cb_t)(void *arg);

typedef struct {
#if IS_USED(MODULE_STMPE811_SPI)
    /* SPI configuration */
    spi_t spi;                          
    spi_mode_t mode;                    
    spi_clk_t clk;                      
    gpio_t cs;                          
#else
    /* I2C details */
    i2c_t i2c;                         
    uint8_t addr;                      
#endif
    gpio_t int_pin;                    
    uint16_t xmax;                     
    uint16_t ymax;                     
    stmpe811_touch_conv_t xyconv;      
} stmpe811_params_t;

typedef struct {
#ifdef MODULE_TOUCH_DEV
    touch_dev_t *dev;                   
#endif
    stmpe811_params_t params;           
    stmpe811_event_cb_t cb;             
    void *cb_arg;                       
    uint16_t prev_x;                    
    uint16_t prev_y;                    
} stmpe811_t;

int stmpe811_init(stmpe811_t *dev, const stmpe811_params_t * params,
                  stmpe811_event_cb_t cb, void *arg);

int stmpe811_read_touch_position(stmpe811_t *dev, stmpe811_touch_position_t *position);

int stmpe811_read_touch_state(const stmpe811_t *dev, stmpe811_touch_state_t *state);
 
#ifdef __cplusplus
}
#endif