rt-thread/bsp/imxrt1052-evk/Libraries/drivers/fsl_gpt.c

115 lines
4.3 KiB
C

/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* Copyright 2016-2017 NXP
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form 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.
*
* o Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 "fsl_gpt.h"
/*******************************************************************************
* Prototypes
******************************************************************************/
/*******************************************************************************
* Variables
******************************************************************************/
/*! @brief Pointers to GPT bases for each instance. */
static GPT_Type *const s_gptBases[] = GPT_BASE_PTRS;
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
/*! @brief Pointers to GPT clocks for each instance. */
static const clock_ip_name_t s_gptClocks[] = GPT_CLOCKS;
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
/*******************************************************************************
* Code
******************************************************************************/
static uint32_t GPT_GetInstance(GPT_Type *base)
{
uint32_t instance;
/* Find the instance index from base address mappings. */
for (instance = 0U; instance < ARRAY_SIZE(s_gptBases); instance++)
{
if (s_gptBases[instance] == base)
{
break;
}
}
assert(instance < ARRAY_SIZE(s_gptBases));
return instance;
}
void GPT_Init(GPT_Type *base, const gpt_config_t *initConfig)
{
assert(initConfig);
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
/* Ungate the GPT clock*/
CLOCK_EnableClock(s_gptClocks[GPT_GetInstance(base)]);
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
base->CR = 0U;
GPT_SoftwareReset(base);
base->CR =
(initConfig->enableFreeRun ? GPT_CR_FRR_MASK : 0U) | (initConfig->enableRunInWait ? GPT_CR_WAITEN_MASK : 0U) |
(initConfig->enableRunInStop ? GPT_CR_STOPEN_MASK : 0U) |
(initConfig->enableRunInDoze ? GPT_CR_DOZEEN_MASK : 0U) |
(initConfig->enableRunInDbg ? GPT_CR_DBGEN_MASK : 0U) | (initConfig->enableMode ? GPT_CR_ENMOD_MASK : 0U);
GPT_SetClockSource(base, initConfig->clockSource);
GPT_SetClockDivider(base, initConfig->divider);
}
void GPT_Deinit(GPT_Type *base)
{
/* Disable GPT timers */
base->CR = 0U;
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
/* Gate the GPT clock*/
CLOCK_DisableClock(s_gptClocks[GPT_GetInstance(base)]);
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
}
void GPT_GetDefaultConfig(gpt_config_t *config)
{
assert(config);
config->clockSource = kGPT_ClockSource_Periph;
config->divider = 1U;
config->enableRunInStop = true;
config->enableRunInWait = true;
config->enableRunInDoze = false;
config->enableRunInDbg = false;
config->enableFreeRun = false;
config->enableMode = true;
}