RIOT/tests/drivers/stmpe811/main.c

/*
 * 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.
 */

/**
 * @ingroup tests
 * @{
 *
 * @file
 * @brief       Test application for the STMPE811 touchscreen controller
 *
 * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
 *
 * @}
 */

#include <stdio.h>

#include "mutex.h"

#include "stmpe811.h"
#include "stmpe811_params.h"

#if IS_ACTIVE(STMPE811_POLLING_MODE)
#include "ztimer.h"
#endif

#ifndef STMPE811_POLLING_PERIOD
#define STMPE811_POLLING_PERIOD   50
#endif

#if !IS_ACTIVE(STMPE811_POLLING_MODE)
static void _touch_event_cb(void *arg)
{
    mutex_unlock(arg);
}
#endif

int main(void)
{
#if !IS_ACTIVE(STMPE811_POLLING_MODE)
    mutex_t lock = MUTEX_INIT_LOCKED;
#endif
    stmpe811_t dev;

    puts("STMPE811 test application\n");

    printf("+------------Initializing------------+\n");
#if IS_ACTIVE(STMPE811_POLLING_MODE)
    int ret = stmpe811_init(&dev, &stmpe811_params[0], NULL, NULL);
#else
    int ret = stmpe811_init(&dev, &stmpe811_params[0], _touch_event_cb, &lock);
#endif
    if (ret != 0) {
        puts("[Error] Initialization failed");
        return 1;
    }

    puts("Initialization successful");

    stmpe811_touch_state_t current_touch_state;
    stmpe811_read_touch_state(&dev, &current_touch_state);
    stmpe811_touch_state_t last_touch_state = current_touch_state;

    while (1) {

#if IS_ACTIVE(STMPE811_POLLING_MODE)
        /* polling is used */
        ztimer_sleep(ZTIMER_MSEC, STMPE811_POLLING_PERIOD);
#else
        /* wait for touch event */
        mutex_lock(&lock);
#endif

        stmpe811_read_touch_state(&dev, &current_touch_state);

        if (current_touch_state != last_touch_state) {
            if (current_touch_state == STMPE811_TOUCH_STATE_PRESSED) {
                puts("Pressed!");
            }
            if (current_touch_state == STMPE811_TOUCH_STATE_RELEASED) {
                puts("Released!");
            }
            last_touch_state = current_touch_state;
        }

        /* Display touch position if pressed */
        if (current_touch_state == STMPE811_TOUCH_STATE_PRESSED) {
            stmpe811_touch_position_t position;
            stmpe811_read_touch_position(&dev, &position);
            printf("X: %i, Y:%i\n", position.x, position.y);
        }
    }

    return 0;
}