129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-06-19 thread-liu first version
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*/
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#include <board.h>
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#ifdef BSP_USING_LPTIM
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#include "drv_config.h"
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#include <string.h>
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#include <stdlib.h>
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//#define DRV_DEBUG
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#define LOG_TAG "drv.lptimer"
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#include <drv_log.h>
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LPTIM_HandleTypeDef hlptim1;
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void LPTIM1_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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HAL_LPTIM_IRQHandler(&hlptim1);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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void HAL_LPTIM_AutoReloadMatchCallback(LPTIM_HandleTypeDef *hlptim)
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{
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if(hlptim->Instance == LPTIM1)
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{
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rt_kprintf("hello rt-thread!\n");
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}
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}
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static int lptim_control(uint8_t pre_value)
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{
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if(pre_value > 7)
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{
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pre_value = 7;
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}
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hlptim1.Instance->CFGR &= ~(7 << 9); /* clear PRESC[2:0] */
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hlptim1.Instance->CFGR |= pre_value << 9; /* set PRESC[2:0] */
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return RT_EOK;
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}
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/**
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* This function initialize the lptim
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*/
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static int lptim_init(void)
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{
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hlptim1.Instance = LPTIM1;
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hlptim1.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
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hlptim1.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1;
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hlptim1.Init.UltraLowPowerClock.Polarity = LPTIM_CLOCKPOLARITY_RISING;
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hlptim1.Init.UltraLowPowerClock.SampleTime = LPTIM_CLOCKSAMPLETIME_DIRECTTRANSITION;
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hlptim1.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
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hlptim1.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH;
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hlptim1.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
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hlptim1.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
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hlptim1.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
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hlptim1.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
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if (HAL_LPTIM_Init(&hlptim1) != HAL_OK)
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{
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LOG_D("LPTIM Init Error!\n");
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return -RT_ERROR;
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}
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/* ### Start counting in interrupt mode ############################# */
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if (HAL_LPTIM_Counter_Start_IT(&hlptim1, 5000) != HAL_OK)
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{
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LOG_D("LPTIM Start Counting Error!\n");
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return -RT_ERROR;
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}
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return RT_EOK;
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}
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static int lptim_deinit()
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{
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if (HAL_LPTIM_DeInit(&hlptim1) != HAL_OK)
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{
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LOG_D("LPTIM Deinit Error!\n");
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return -RT_ERROR;
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}
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return RT_EOK;
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}
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static int lptim_sample(int argc, char *argv[])
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{
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if (argc > 1)
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{
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if (!strcmp(argv[1], "run"))
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{
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lptim_init();
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}
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else if (!strcmp(argv[1], "stop"))
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{
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lptim_deinit();
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}
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else if (!strcmp(argv[1], "set"))
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{
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if (argc > 2)
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{
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lptim_control(atoi(argv[2]));
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}
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}
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}
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else
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{
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rt_kprintf("Usage:\n");
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rt_kprintf("lptim_sample run - open lptim, shell will printf 'hello rt-thread'\n");
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rt_kprintf("lptim_sample set - set the lptim prescaler, lptim_sample set [0 - 7]\n");
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}
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return RT_EOK;
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}
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MSH_CMD_EXPORT(lptim_sample, low power timer sample);
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#endif
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