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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-07-24 Tanek the first version
* 2018-11-12 Ernest Chen modify copyright
*/
#include "board.h"
#include <stdint.h>
#include "drv_usart.h"
#include "drv_gpio.h"
#include <rthw.h>
#include <rtthread.h>
/* Updates the variable SystemCoreClock and must be called
* whenever the core clock is changed during program execution.
*/
extern void SystemCoreClockUpdate(void);
/* core clock */
extern uint32_t SystemCoreClock;
volatile rt_uint32_t g_ticks=0;
static uint32_t _SysTick_Config(rt_uint32_t ticks)
{
g_ticks=ticks;
/* disable hardware pushing stack automatically and disable interrupt nesting */
PFIC->CFGR=0xFA050003;
NVIC_SetPriority(SysTicK_IRQn,0xf0);
NVIC_SetPriority(Software_IRQn,0xf0);
SysTick->CTLR=0;
SysTick->CNTL0=0;SysTick->CNTL1=0;SysTick->CNTL2=0;SysTick->CNTL3=0;
SysTick->CNTH0=0;SysTick->CNTH1=0;SysTick->CNTH2=0;SysTick->CNTH3=0;
SysTick->CMPLR0=(rt_uint8_t)(g_ticks-1);
SysTick->CMPLR1=(rt_uint8_t)((g_ticks-1)>>8);
SysTick->CMPLR2=(rt_uint8_t)((g_ticks-1)>>16);
SysTick->CMPLR3=(rt_uint8_t)((g_ticks-1)>>24);
SysTick->CMPHR0=0;SysTick->CMPHR1=0;SysTick->CMPHR2=0;SysTick->CMPHR3=0;
SysTick->CTLR=0x1;
NVIC_EnableIRQ(SysTicK_IRQn);
NVIC_EnableIRQ(Software_IRQn);
return 0;
}
#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
#define RT_HEAP_SIZE (1024)
/* heap default size: 4K(1024 * 4) */
static uint32_t rt_heap[RT_HEAP_SIZE];
rt_weak void *rt_heap_begin_get(void)
{
return rt_heap;
}
rt_weak void *rt_heap_end_get(void)
{
return rt_heap + RT_HEAP_SIZE;
}
#endif
/**
* This function will initial your board.
*/
void rt_hw_board_init()
{
/* System Clock Update */
SystemCoreClockUpdate();
/* System Tick Configuration, systick clock is HCLK/8 */
_SysTick_Config(SystemCoreClock / 8 / RT_TICK_PER_SECOND);
/* Call components board initial (use INIT_BOARD_EXPORT()) */
#ifdef RT_USING_PIN
/* pin must initialized before i2c */
rt_hw_pin_init();
#endif
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
rt_system_heap_init(rt_heap_begin_get(), rt_heap_end_get());
#endif
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
}
void SysTick_Handler(void) __attribute__((interrupt()));
void SysTick_Handler(void)
{
GET_INT_SP();
/* enter interrupt */
rt_interrupt_enter();
SysTick->CTLR=0;
SysTick->CNTL0=0;SysTick->CNTL1=0;SysTick->CNTL2=0;SysTick->CNTL3=0;
SysTick->CNTH0=0;SysTick->CNTH1=0;SysTick->CNTH2=0;SysTick->CNTH3=0;
SysTick->CTLR=0x1;
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
FREE_INT_SP();
}
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