147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
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/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009 RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2017-09-14 Haley first implementation
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*/
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#include "board.h"
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#include <rtthread.h>
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#include <rthw.h>
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#include "am_mcu_apollo.h"
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#include "hal/am_hal_clkgen.h"
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#include "hal/am_hal_cachectrl.h"
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#include "hw_uart.h"
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#define TICK_RATE_HZ RT_TICK_PER_SECOND
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#define SYSTICK_CLOCK_HZ ( 32768UL )
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#define WAKE_INTERVAL ( (uint32_t) ((SYSTICK_CLOCK_HZ / TICK_RATE_HZ)) )
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/**
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* This is the timer interrupt service routine.
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*
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*/
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void am_stimer_cmpr0_isr(void)
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{
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/* Check the timer interrupt status */
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am_hal_stimer_int_clear(AM_HAL_STIMER_INT_COMPAREA);
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am_hal_stimer_compare_delta_set(0, WAKE_INTERVAL);
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if (rt_thread_self() != RT_NULL)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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}
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}
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/**
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* This is the SysTick Configure.
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*
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*/
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void SysTick_Configuration(void)
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{
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/* Set the main clk */
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am_hal_clkgen_sysclk_select(AM_HAL_CLKGEN_SYSCLK_MAX);
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/* Enable compare A interrupt in STIMER */
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am_hal_stimer_int_enable(AM_HAL_STIMER_INT_COMPAREA);
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/* Enable the timer interrupt in the NVIC */
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am_hal_interrupt_enable(AM_HAL_INTERRUPT_STIMER_CMPR0);
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/* Configure the STIMER and run */
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am_hal_stimer_config(AM_HAL_STIMER_CFG_CLEAR | AM_HAL_STIMER_CFG_FREEZE);
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am_hal_stimer_compare_delta_set(0, WAKE_INTERVAL);
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am_hal_stimer_config(AM_HAL_STIMER_XTAL_32KHZ |
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AM_HAL_STIMER_CFG_COMPARE_A_ENABLE);
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}
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/**
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* This is the CacheCtrl Enable.
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*
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*/
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void CacheCtrl_Enable(void)
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{
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am_hal_cachectrl_enable(&am_hal_cachectrl_defaults);
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}
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/**
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* This is the low power operation.
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* This function enables several power-saving features of the MCU, and
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* disables some of the less-frequently used peripherals. It also sets the
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* system clock to 24 MHz.
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*/
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void am_low_power_init(void)
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{
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/* Enable internal buck converters */
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am_hal_pwrctrl_bucks_init();
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/* Initialize for low power in the power control block */
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am_hal_pwrctrl_low_power_init();
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/* Turn off the voltage comparator as this is enabled on reset */
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am_hal_vcomp_disable();
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/* Run the RTC off the LFRC */
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am_hal_rtc_osc_select(AM_HAL_RTC_OSC_LFRC);
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/* Stop the XT and LFRC */
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am_hal_clkgen_osc_stop(AM_HAL_CLKGEN_OSC_XT);
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// am_hal_clkgen_osc_stop(AM_HAL_CLKGEN_OSC_LFRC);
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/* Disable the RTC */
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am_hal_rtc_osc_disable();
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}
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/**
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* This is the deep power save.
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*
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*/
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void deep_power_save(void)
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{
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am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_DEEP);
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}
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/**
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* This function will initial APOLLO2 board.
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*/
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void rt_hw_board_init(void)
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{
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/* Set the clock frequency */
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SysTick_Configuration();
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/* Set the default cache configuration */
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CacheCtrl_Enable();
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/* Configure the board for low power operation */
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//am_low_power_init();
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#ifdef RT_USING_IDLE_HOOK
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rt_thread_idle_sethook(deep_power_save);
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#endif
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#ifdef RT_USING_CONSOLE
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rt_hw_uart_init();
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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}
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/*@}*/
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