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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-08-20 Abbcc first version
* 2022-03-04 stevetong459 FINSH_FUNCTION_EXPORT_ALIAS change to MSH_CMD_EXPORT for reboot function.
*/
#include "drv_common.h"
#include "board.h"
#ifdef RT_USING_SERIAL
#ifdef RT_USING_SERIAL_V2
#include "drv_usart_v2.h"
#else
#include "drv_usart.h"
#endif
#endif
#ifdef RT_USING_FINSH
#include <finsh.h>
static void reboot(uint8_t argc, char **argv)
{
rt_hw_cpu_reset();
}
MSH_CMD_EXPORT(reboot, Reboot System);
#endif /* RT_USING_FINSH */
/* SysTick configuration */
void rt_hw_systick_init(void)
{
SysTick_Config(RCM_ReadHCLKFreq() / RT_TICK_PER_SECOND);
/* AHB clock selected as SysTick clock source. */
SysTick->CTRL |= 0x00000004U;
NVIC_SetPriority(SysTick_IRQn, 0xFF);
}
/**
* This is the timer interrupt service routine.
*
*/
void SysTick_Handler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
/**
* This function will delay for some us.
*
* @param us the delay time of us
*/
void rt_hw_us_delay(rt_uint32_t us)
{
rt_uint32_t ticks;
rt_uint32_t told, tnow, tcnt = 0;
rt_uint32_t reload = SysTick->LOAD;
ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
told = SysTick->VAL;
while (1)
{
tnow = SysTick->VAL;
if (tnow != told)
{
if (tnow < told)
{
tcnt += told - tnow;
}
else
{
tcnt += reload - tnow + told;
}
told = tnow;
if (tcnt >= ticks)
{
break;
}
}
}
}
/**
* This function will config the board for initialization.
*/
rt_weak void rt_hw_board_init(void)
{
/* Systick initialization */
rt_hw_systick_init();
/* Heap initialization */
#if defined(RT_USING_HEAP)
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif
/* Pin driver initialization is open by default */
#ifdef RT_USING_PIN
rt_hw_pin_init();
#endif
/* USART driver initialization is open by default */
#ifdef RT_USING_SERIAL
rt_hw_usart_init();
#endif
/* Set the shell console output device */
#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
/* Board underlying hardware initialization */
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
}
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