owner-nrf52sdk/nRF5_SDK_15.2.0/components/libraries/sensorsim/sensorsim.c

/**
 * Copyright (c) 2012 - 2018, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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 */
#include "sensorsim.h"


void sensorsim_init(sensorsim_state_t     * p_state,
                    const sensorsim_cfg_t * p_cfg)
{
    if (p_cfg->start_at_max)
    {
        p_state->current_val   = p_cfg->max;
        p_state->is_increasing = false;
    }
    else
    {
        p_state->current_val   = p_cfg->min;
        p_state->is_increasing = true;
    }
}


uint32_t sensorsim_measure(sensorsim_state_t     * p_state,
                           const sensorsim_cfg_t * p_cfg)
{
    if (p_state->is_increasing)
    {
        sensorsim_increment(p_state, p_cfg);
    }
    else
    {
        sensorsim_decrement(p_state, p_cfg);
    }
    return p_state->current_val;
}

void sensorsim_increment(sensorsim_state_t *     p_state,
                         const sensorsim_cfg_t * p_cfg)
{
    if (p_cfg->max - p_state->current_val > p_cfg->incr)
    {
        p_state->current_val += p_cfg->incr;
    }
    else
    {
        p_state->current_val   = p_cfg->max;
        p_state->is_increasing = false;
    }
}


void sensorsim_decrement(sensorsim_state_t *     p_state,
                         const sensorsim_cfg_t * p_cfg)
{
    if (p_state->current_val - p_cfg->min > p_cfg->incr)
    {
        p_state->current_val -= p_cfg->incr;
    }
    else
    {
        p_state->current_val   = p_cfg->min;
        p_state->is_increasing = true;
    }
}