149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
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/*
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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<75><73><EFBFBD><EFBFBD>ʱ
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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<41><44>ֵ
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ticks=us; //<2F><>Ҫ<EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD>
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rt_enter_critical(); //<2F><>ֹOS<4F><53><EFBFBD>ȣ<EFBFBD><C8A3><EFBFBD>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD>us<75><73>ʱ
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told=SysTick->VAL; //<2F>ս<EFBFBD><D5BD><EFBFBD>ʱ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ֵ
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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; //<2F><><EFBFBD><EFBFBD>ע<EFBFBD><D7A2>һ<EFBFBD><D2BB>SYSTICK<43><4B>һ<EFBFBD><D2BB><EFBFBD>ݼ<EFBFBD><DDBC>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϳ<EFBFBD><CDBF><EFBFBD><EFBFBD><EFBFBD>.
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else tcnt+=reload-tnow+told;
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told=tnow;
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if(tcnt>=ticks)break; //ʱ<>䳬<EFBFBD><E4B3AC>/<2F><><EFBFBD><EFBFBD>Ҫ<EFBFBD>ӳٵ<D3B3>ʱ<EFBFBD><CAB1>,<2C><><EFBFBD>˳<EFBFBD>.
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}
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};
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rt_exit_critical(); //<2F>ָ<EFBFBD>OS<4F><53><EFBFBD><EFBFBD>
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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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//ѡ<><D1A1>0<EFBFBD><30>region
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MPU->RNR=0;
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//ѡ<><D1A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
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MPU->RBAR=0x00000000;
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><D4BC><EFBFBD><EFBFBD><EFBFBD>
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MPU->RASR=((0x3)<<MPU_RASR_AP_Pos)|((31)<<MPU_RASR_SIZE_Pos)|(0x5<<16)|1;
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//<2F><><EFBFBD><EFBFBD>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初始<E5889D><E5A78B>?
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// Usart_Config(); // 串口初始<E5889D><E5A78B>?
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// SDRAM_Init(); // sdram要先于emwin之前初始<E5889D><E5A78B>?
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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(); // 触摸屏初始化
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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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