124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* Change Logs:
|
||
|
|
* Date Author Notes
|
||
|
|
* 2019-05-06 Zero-Free first version
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <board.h>
|
||
|
|
#include <drv_lptim.h>
|
||
|
|
|
||
|
|
static LPTIM_HandleTypeDef LptimHandle;
|
||
|
|
|
||
|
|
void LPTIM1_IRQHandler(void)
|
||
|
|
{
|
||
|
|
HAL_LPTIM_IRQHandler(&LptimHandle);
|
||
|
|
}
|
||
|
|
|
||
|
|
void HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef *hlptim)
|
||
|
|
{
|
||
|
|
/* enter interrupt */
|
||
|
|
rt_interrupt_enter();
|
||
|
|
|
||
|
|
/* leave interrupt */
|
||
|
|
rt_interrupt_leave();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function get current count value of LPTIM
|
||
|
|
*
|
||
|
|
* @return the count vlaue
|
||
|
|
*/
|
||
|
|
rt_uint32_t stm32l4_lptim_get_current_tick(void)
|
||
|
|
{
|
||
|
|
return HAL_LPTIM_ReadCounter(&LptimHandle);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function get the max value that LPTIM can count
|
||
|
|
*
|
||
|
|
* @return the max count
|
||
|
|
*/
|
||
|
|
rt_uint32_t stm32l4_lptim_get_tick_max(void)
|
||
|
|
{
|
||
|
|
return (0xFFFF);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function start LPTIM with reload value
|
||
|
|
*
|
||
|
|
* @param reload The value that LPTIM count down from
|
||
|
|
*
|
||
|
|
* @return RT_EOK
|
||
|
|
*/
|
||
|
|
rt_err_t stm32l4_lptim_start(rt_uint32_t reload)
|
||
|
|
{
|
||
|
|
HAL_LPTIM_TimeOut_Start_IT(&LptimHandle, 0xFFFF, reload);
|
||
|
|
|
||
|
|
return (RT_EOK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function stop LPTIM
|
||
|
|
*/
|
||
|
|
void stm32l4_lptim_stop(void)
|
||
|
|
{
|
||
|
|
rt_uint32_t _ier;
|
||
|
|
|
||
|
|
_ier = LptimHandle.Instance->IER;
|
||
|
|
LptimHandle.Instance->ICR = LptimHandle.Instance->ISR & _ier;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function get the count clock of LPTIM
|
||
|
|
*
|
||
|
|
* @return the count clock frequency in Hz
|
||
|
|
*/
|
||
|
|
rt_uint32_t stm32l4_lptim_get_countfreq(void)
|
||
|
|
{
|
||
|
|
return 32000 / 32;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function initialize the lptim
|
||
|
|
*/
|
||
|
|
int stm32l4_hw_lptim_init(void)
|
||
|
|
{
|
||
|
|
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
|
||
|
|
RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct = {0};
|
||
|
|
|
||
|
|
/* Enable LSI clock */
|
||
|
|
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
|
||
|
|
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
|
||
|
|
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
|
||
|
|
HAL_RCC_OscConfig(&RCC_OscInitStruct);
|
||
|
|
|
||
|
|
/* Select the LSI clock as LPTIM peripheral clock */
|
||
|
|
RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LPTIM1;
|
||
|
|
RCC_PeriphCLKInitStruct.Lptim1ClockSelection = RCC_LPTIM1CLKSOURCE_LSI;
|
||
|
|
HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct);
|
||
|
|
|
||
|
|
LptimHandle.Instance = LPTIM1;
|
||
|
|
LptimHandle.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
|
||
|
|
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV32;
|
||
|
|
LptimHandle.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
|
||
|
|
LptimHandle.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH;
|
||
|
|
LptimHandle.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
|
||
|
|
LptimHandle.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
|
||
|
|
if (HAL_LPTIM_Init(&LptimHandle) != HAL_OK)
|
||
|
|
{
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
NVIC_ClearPendingIRQ(LPTIM1_IRQn);
|
||
|
|
NVIC_SetPriority(LPTIM1_IRQn, 0);
|
||
|
|
NVIC_EnableIRQ(LPTIM1_IRQn);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
INIT_DEVICE_EXPORT(stm32l4_hw_lptim_init);
|