164 lines
3.3 KiB
C
164 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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#include "libc.h"
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#include "string.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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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;
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ticks=us;
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rt_enter_critical();
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told=SysTick->VAL;
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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;
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else tcnt+=reload-tnow+told;
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told=tnow;
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if(tcnt>=ticks)break;
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}
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};
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rt_exit_critical();
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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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RT_WEAK void *rt_heap_begin_get(void)
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{
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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 (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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MPU->RNR=0;
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MPU->RBAR=0x00000000;
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MPU->RASR=((0x3)<<MPU_RASR_AP_Pos)|((31)<<MPU_RASR_SIZE_Pos)|(0x5<<16)|1;
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MPU->CTRL=1;
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}
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const libc_device_file *g_usart;
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>ӣ<EFBFBD>25m<35><6D><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA>֤usbΪ48m<38><6D><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ168m
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void reconfig_clock(void) {
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RCC_ClocksTypeDef rcc = {0};
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// RCC_PLLConfig(RCC_PLLSource_HSE, 25, 336, 2, 7);
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RCC_GetClocksFreq(&rcc);
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SystemCoreClock = rcc.SYSCLK_Frequency;
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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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NVIC_SetVectorTable(NVIC_VectTab_FLASH,(u32)0);
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reconfig_clock();
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_SysTick_Config (SystemCoreClock/1000);
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NVIC_SetPriority (SysTick_IRQn, (1<<__NVIC_PRIO_BITS) - 1);
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LED_Init();
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Usart_Config();
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SDRAM_Init();
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sFLASH_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();
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USART3_Init();
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RANDOM_Init();
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// USBD_InitAsVcp ();
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g_usart = libc_find_dev("usart");
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g_usart->open();
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}
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void rt_hw_console_output(const char *str)
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{
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/* empty console output */
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g_usart->write(str,strlen(str));
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}
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void SysTick_Handler(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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