2022-03-26 15:40:33 +08:00
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/*
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* Copyright (c) 2006-2022, 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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* 2021-10-13 AisinoChip first add to bsp
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*/
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#include "board.h"
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#include <rtdevice.h>
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#if defined(RT_USING_PM)
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#define IWDT_SRC_CLK 32000
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#define IWDT_CLK_PRESCALER IWDT_CLOCK_PRESCALER_32
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#define IWDT_CLK (IWDT_SRC_CLK / (4<<IWDT_CLK_PRESCALER))
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static IWDT_HandleTypeDef hiwdt;
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static rt_tick_t get_pm_tick_from_os_tick(rt_tick_t tick)
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{
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return (rt_tick_t)(IWDT_CLK * tick / RT_TICK_PER_SECOND);
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}
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static rt_tick_t get_os_tick_from_pm_tick(rt_tick_t tick)
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{
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static rt_uint32_t os_tick_remain = 0;
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rt_uint32_t ret;
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ret = (tick * RT_TICK_PER_SECOND + os_tick_remain) / IWDT_CLK;
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os_tick_remain += (tick * RT_TICK_PER_SECOND);
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os_tick_remain %= IWDT_CLK;
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return ret;
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}
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static void _pm_sleep(struct rt_pm *pm, rt_uint8_t mode)
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{
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RT_ASSERT(pm != RT_NULL);
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switch(mode)
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{
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case PM_SLEEP_MODE_NONE:
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break;
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case PM_SLEEP_MODE_IDLE:
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break;
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case PM_SLEEP_MODE_LIGHT:
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System_Enter_Sleep_Mode(SLEEPENTRY_WFI);
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break;
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case PM_SLEEP_MODE_DEEP:
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System_Enter_Stop_Mode(STOPENTRY_WFI);
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break;
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case PM_SLEEP_MODE_STANDBY:
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System_Enter_Standby_Mode();
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break;
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case PM_SLEEP_MODE_SHUTDOWN:
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break;
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default:
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return;
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}
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}
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static void _pm_run(struct rt_pm *pm, rt_uint8_t mode)
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{
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static rt_uint8_t prev_mode = 0;
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RT_ASSERT(pm != RT_NULL);
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if(prev_mode == mode)
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{
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return;
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}
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switch(mode)
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{
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case PM_RUN_MODE_HIGH_SPEED: /* 64Mhz */
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case PM_RUN_MODE_NORMAL_SPEED: /* 64Mhz */
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System_Clock_Init(64000000);
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break;
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case PM_RUN_MODE_MEDIUM_SPEED: /* 32Mhz */
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System_Clock_Init(32000000);
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break;
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case PM_RUN_MODE_LOW_SPEED: /* 8Mhz */
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System_Clock_Init(8000000);
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break;
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default:
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return;
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}
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SysTick_Config(System_Get_SystemClock() / RT_TICK_PER_SECOND);
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prev_mode = mode;
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}
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static void _pm_timer_start(struct rt_pm *pm, rt_uint32_t timeout)
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{
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int tick;
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RT_ASSERT(pm != RT_NULL);
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IWDT_HandleTypeDef *phiwdt = (IWDT_HandleTypeDef *)(pm->parent.user_data);
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if(timeout != RT_TICK_MAX)
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{
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tick = get_pm_tick_from_os_tick(timeout);
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phiwdt->Instance = IWDT;
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phiwdt->Init.Prescaler = IWDT_CLK_PRESCALER;
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phiwdt->Init.Reload = tick;
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phiwdt->Init.Window = tick; /* window function disabled when window >= reload */
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phiwdt->Init.Wakeup = tick - 1; /* wakeup function disabled when wakeup >= reload */
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HAL_IWDT_Init(phiwdt);
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}
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}
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static void _pm_timer_stop(struct rt_pm *pm)
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{
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RT_ASSERT(pm != RT_NULL);
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IWDT_HandleTypeDef *phiwdt = (IWDT_HandleTypeDef *)(pm->parent.user_data);
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phiwdt->Instance->CMDR = 0xFFFF;
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}
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static rt_tick_t _pm_timer_get_tick(struct rt_pm *pm)
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{
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rt_tick_t tick;
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RT_ASSERT(pm != RT_NULL);
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2024-03-24 09:14:37 +08:00
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2023-05-04 22:11:33 +08:00
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tick = 1;
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2022-03-26 15:40:33 +08:00
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return get_os_tick_from_pm_tick(tick);
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}
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static const struct rt_pm_ops _pm_ops =
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{
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_pm_sleep,
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_pm_run,
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_pm_timer_start,
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_pm_timer_stop,
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_pm_timer_get_tick
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};
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/**
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* This function initialize the power manager
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*/
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int drv_pm_hw_init(void)
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{
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rt_uint8_t timer_mask = 0;
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/* initialize timer mask */
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timer_mask = (1UL << PM_SLEEP_MODE_DEEP) | (1UL << PM_SLEEP_MODE_STANDBY);
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/* initialize system pm module */
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rt_system_pm_init(&_pm_ops, timer_mask, &hiwdt);
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return 0;
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}
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INIT_BOARD_EXPORT(drv_pm_hw_init);
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#endif /* RT_USING_PM */
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