92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2006-2019, 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 <stdint.h>
|
|
#include <rthw.h>
|
|
#include <rtthread.h>
|
|
|
|
#define _SCB_BASE (0xE000E010UL)
|
|
#define _SYSTICK_CTRL (*(rt_uint32_t *)(_SCB_BASE + 0x0))
|
|
#define _SYSTICK_LOAD (*(rt_uint32_t *)(_SCB_BASE + 0x4))
|
|
#define _SYSTICK_VAL (*(rt_uint32_t *)(_SCB_BASE + 0x8))
|
|
#define _SYSTICK_CALIB (*(rt_uint32_t *)(_SCB_BASE + 0xC))
|
|
#define _SYSTICK_PRI (*(rt_uint8_t *)(0xE000ED23UL))
|
|
|
|
// Updates the variable SystemCoreClock and must be called
|
|
// whenever the core clock is changed during program execution.
|
|
extern void SystemCoreClockUpdate(void);
|
|
|
|
// Holds the system core clock, which is the system clock
|
|
// frequency supplied to the SysTick timer and the processor
|
|
// core clock.
|
|
extern uint32_t SystemCoreClock;
|
|
|
|
static uint32_t _SysTick_Config(rt_uint32_t ticks)
|
|
{
|
|
if ((ticks - 1) > 0xFFFFFF)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
_SYSTICK_LOAD = ticks - 1;
|
|
_SYSTICK_PRI = 0xFF;
|
|
_SYSTICK_VAL = 0;
|
|
_SYSTICK_CTRL = 0x07;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
|
|
#define RT_HEAP_SIZE 1024
|
|
static uint32_t rt_heap[RT_HEAP_SIZE]; // heap default size: 4K(1024 * 4)
|
|
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_Config(SystemCoreClock / RT_TICK_PER_SECOND);
|
|
|
|
/* Call components board initial (use INIT_BOARD_EXPORT()) */
|
|
#ifdef RT_USING_COMPONENTS_INIT
|
|
rt_components_board_init();
|
|
#endif
|
|
//#ifdef RT_USING_CONSOLE
|
|
// rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
|
|
//#endif
|
|
#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
|
|
rt_system_heap_init(rt_heap_begin_get(), rt_heap_end_get());
|
|
#endif
|
|
}
|
|
|
|
void SysTick_Handler(void)
|
|
{
|
|
/* enter interrupt */
|
|
rt_interrupt_enter();
|
|
|
|
rt_tick_increase();
|
|
|
|
/* leave interrupt */
|
|
rt_interrupt_leave();
|
|
}
|