149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
/*
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* Copyright (c) 2006-2018, 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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* 2017-07-24 Tanek the first version
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* 2018-11-12 Ernest Chen modify copyright
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*/
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//#include "bsp_led.h"
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//#include "device.h"
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//#include "device_drv_config.h"
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#include "main.h"
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#include <rthw.h>
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#include <rtthread.h>
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void SystemClock_Config(void);
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#if 1
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#define _SCB_BASE (0xE000E010UL)
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#define _SYSTICK_CTRL (*(rt_uint32_t *)(_SCB_BASE + 0x0))
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#define _SYSTICK_LOAD (*(rt_uint32_t *)(_SCB_BASE + 0x4))
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#define _SYSTICK_VAL (*(rt_uint32_t *)(_SCB_BASE + 0x8))
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#define _SYSTICK_CALIB (*(rt_uint32_t *)(_SCB_BASE + 0xC))
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#define _SYSTICK_PRI (*(rt_uint8_t *)(0xE000ED23UL))
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// Updates the variable SystemCoreClock and must be called
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// whenever the core clock is changed during program execution.
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extern void SystemCoreClockUpdate(void);
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// Holds the system core clock, which is the system clock
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// frequency supplied to the SysTick timer and the processor
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// core clock.
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extern uint32_t SystemCoreClock;
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static uint32_t _SysTick_Config(rt_uint32_t ticks)
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{
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if ((ticks - 1) > 0xFFFFFF)
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{
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return 1;
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}
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_SYSTICK_LOAD = ticks - 1;
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_SYSTICK_PRI = 0xFF;
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_SYSTICK_VAL = 0;
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_SYSTICK_CTRL = 0x07;
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return 0;
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}
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// us级延时
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void rt_hw_us_delay(rt_uint32_t us)
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{
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u32 ticks;
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u32 told,tnow,tcnt=0;
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u32 reload=SysTick->LOAD; //LOAD的值
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ticks=us; //需要的节拍数
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rt_enter_critical(); //阻止OS调度，防止打断us延时
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told=SysTick->VAL; //刚进入时的计数器值
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while(1)
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{
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tnow=SysTick->VAL;
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if(tnow!=told)
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{
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if(tnow<told)tcnt+=told-tnow; //这里注意一下SYSTICK是一个递减的计数器就可以了.
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else tcnt+=reload-tnow+told;
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told=tnow;
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if(tcnt>=ticks)break; //时间超过/等于要延迟的时间,则退出.
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}
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};
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rt_exit_critical(); //恢复OS调度
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}
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#endif
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#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
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#define RT_HEAP_SIZE 5*1024//1536
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//static uint32_t rt_heap[RT_HEAP_SIZE]; // heap default size: 6K(1536 * 4)
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RT_WEAK void *rt_heap_begin_get(void)
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{
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// return rt_heap;
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return (void *)0x10000000;
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}
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RT_WEAK void *rt_heap_end_get(void)
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{
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// return rt_heap + RT_HEAP_SIZE;
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return (void *)(0x10000000+64*1024/4);
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}
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#endif
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void mpu_init(void)
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{
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//选择0号region
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MPU->RNR=0;
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//选择基地址
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MPU->RBAR=0x00000000;
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//设置属性及容量
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MPU->RASR=((0x3)<<MPU_RASR_AP_Pos)|((31)<<MPU_RASR_SIZE_Pos)|(0x5<<16)|1;
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//开启MPU
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MPU->CTRL=1;
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}
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/**
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* This function will initial your board.
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*/
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void rt_hw_board_init()
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{
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NVIC_SetVectorTable(NVIC_VectTab_FLASH,(u32)128*1024);
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_SysTick_Config (SystemCoreClock/1000);
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// LED_Init(); // LED鍒濆<E98D92>鍖?
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// Usart_Config(); // 涓插彛鍒濆<E98D92>鍖?
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// SDRAM_Init(); // sdram瑕佸厛浜巈mwin涔嬪墠鍒濆<E98D92>鍖?
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// sFLASH_Init();
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//SPI_Flash_Init();
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mymem_init();
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rt_system_heap_init(rt_heap_begin_get(),rt_heap_end_get());
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irq_vector_init();
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mpu_init();
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Touch_Init(); // 瑙︽懜灞忓垵濮嬪寲
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USART3_Init();
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RANDOM_Init();
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USBD_InitAsVcp ( );
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}
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void OS_CPU_SysTickHandler(void)
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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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* @brief System Clock Configuration
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* @retval None
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*/
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__weak void SystemClock_Config(void)
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{
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}
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