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xiaozhengsheng
2025-08-19 09:49:41 +08:00
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commit 6df0f7d96e
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components/libraries/simple_timer/app_simple_timer.c Normal file
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/**
* Copyright (c) 2015 - 2020, 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
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "sdk_common.h"
#if NRF_MODULE_ENABLED(SIMPLE_TIMER)
#include "app_simple_timer.h"
#include "nrf.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "nrf_timer.h"
#include "nrf_drv_timer.h"
/**@brief States of simple timer state machine.
*/
typedef enum
{
SIMPLE_TIMER_STATE_IDLE = 0,
SIMPLE_TIMER_STATE_INITIALIZED,
SIMPLE_TIMER_STATE_STOPPED,
SIMPLE_TIMER_STATE_STARTED
}simple_timer_states_t;
static app_simple_timer_mode_t m_mode; /**< Registered timer mode. */
static app_simple_timer_timeout_handler_t m_timeout_handler = NULL; /**< Registered time-out handler. */
static void * mp_timeout_handler_context = NULL; /**< Registered time-out handler context. */
static simple_timer_states_t m_simple_timer_state = SIMPLE_TIMER_STATE_IDLE; /**< State machine state. */
const nrf_drv_timer_t SIMPLE_TIMER = NRF_DRV_TIMER_INSTANCE(SIMPLE_TIMER_CONFIG_INSTANCE);
/**
* @brief Handler for timer events.
*/
static void app_simple_timer_event_handler(nrf_timer_event_t event_type, void * p_context)
{
switch (event_type)
{
case NRF_TIMER_EVENT_COMPARE0:
if (m_mode == APP_SIMPLE_TIMER_MODE_SINGLE_SHOT)
{
m_simple_timer_state = SIMPLE_TIMER_STATE_STOPPED;
}
//@note: No NULL check required as performed in timer_start(...).
m_timeout_handler(mp_timeout_handler_context);
break;
default:
//Do nothing.
break;
}
}
uint32_t app_simple_timer_init(void)
{
uint32_t err_code = NRF_SUCCESS;
nrf_drv_timer_config_t t_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
t_cfg.mode = NRF_TIMER_MODE_TIMER;
t_cfg.bit_width = NRF_TIMER_BIT_WIDTH_16;
t_cfg.frequency = (nrf_timer_frequency_t)SIMPLE_TIMER_CONFIG_FREQUENCY;
err_code = nrf_drv_timer_init(&SIMPLE_TIMER, &t_cfg, app_simple_timer_event_handler);
if (NRF_SUCCESS == err_code)
{
m_simple_timer_state = SIMPLE_TIMER_STATE_INITIALIZED;
}
return err_code;
}
uint32_t app_simple_timer_start(app_simple_timer_mode_t mode,
app_simple_timer_timeout_handler_t timeout_handler,
uint16_t timeout_ticks,
void * p_context)
{
uint32_t err_code = NRF_SUCCESS;
nrf_timer_short_mask_t timer_short;
VERIFY_PARAM_NOT_NULL(timeout_handler);
if (APP_SIMPLE_TIMER_MODE_REPEATED == mode)
{
timer_short = NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK;
}
else if (APP_SIMPLE_TIMER_MODE_SINGLE_SHOT == mode)
{
timer_short = NRF_TIMER_SHORT_COMPARE0_STOP_MASK;
}
else
{
return NRF_ERROR_INVALID_PARAM;
}
if (SIMPLE_TIMER_STATE_IDLE == m_simple_timer_state)
{
return NRF_ERROR_INVALID_STATE;
}
if (SIMPLE_TIMER_STATE_STARTED == m_simple_timer_state)
{
err_code = app_simple_timer_stop();
APP_ERROR_CHECK(err_code);
}
if (SIMPLE_TIMER_STATE_STOPPED == m_simple_timer_state)
{
nrf_drv_timer_clear(&SIMPLE_TIMER);
}
m_mode = mode;
m_timeout_handler = timeout_handler;
mp_timeout_handler_context = p_context;
nrf_drv_timer_extended_compare(
&SIMPLE_TIMER, NRF_TIMER_CC_CHANNEL0, (uint32_t)timeout_ticks, timer_short, true);
if (m_simple_timer_state == SIMPLE_TIMER_STATE_STOPPED)
{
nrf_drv_timer_resume(&SIMPLE_TIMER);
}
else
{
nrf_drv_timer_enable(&SIMPLE_TIMER);
}
m_simple_timer_state = SIMPLE_TIMER_STATE_STARTED;
return NRF_SUCCESS;
}
uint32_t app_simple_timer_stop(void)
{
if (SIMPLE_TIMER_STATE_STARTED == m_simple_timer_state)
{
nrf_drv_timer_pause(&SIMPLE_TIMER);
m_simple_timer_state = SIMPLE_TIMER_STATE_STOPPED;
}
return NRF_SUCCESS;
}
uint32_t app_simple_timer_uninit(void)
{
uint32_t err_code = NRF_SUCCESS;
if (SIMPLE_TIMER_STATE_IDLE != m_simple_timer_state)
{
nrf_drv_timer_uninit(&SIMPLE_TIMER);
m_simple_timer_state = SIMPLE_TIMER_STATE_IDLE;
}
return err_code;
}
#endif //NRF_MODULE_ENABLED(SIMPLE_TIMER)