/*
?*?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?
#include?
#include?
#include?“usart.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*10
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（）;
??????MX_USART1_UART_Init（）;
????/*?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

#if?defined（RT_USING_USER_MAIN）?&&?defined（RT_USING_HEAP）
????rt_system_heap_init（rt_heap_begin_get（）?rt_heap_end_get（））;
#endif
}

void?rt_hw_console_output（const?char?*str）
{
?Usart_SendString（（char?*）str）;
?printf（“\r\n“）;
}

void?SysTick_Handler（void）
{
????/*?enter?interrupt?*/
????rt_interrupt_enter（）;

????rt_tick_increase（）;
//printf（“%s“__FUNCTION__）;
????/*?leave?interrupt?*/
????rt_interrupt_leave（）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????7496??2020-05-27?22:26??STM32L431RC_BearPiUART\.mxproject

?????文件???????2488??2020-05-28?22:30??STM32L431RC_BearPiUART\Board\board.c

?????文件????1149034??2020-04-22?21:45??STM32L431RC_BearPiUART\Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l431xx.h

?????文件???????7953??2020-04-22?21:45??STM32L431RC_BearPiUART\Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l4xx.h

?????文件???????2615??2020-04-22?21:45??STM32L431RC_BearPiUART\Drivers\CMSIS\Device\ST\STM32L4xx\Include\system_stm32l4xx.h

?????文件??????28208??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\cmsis_armcc.h

?????文件??????56497??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\cmsis_armclang.h

?????文件???????9014??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\cmsis_compiler.h

?????文件??????62344??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\cmsis_gcc.h

?????文件??????28414??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\cmsis_iccarm.h

?????文件???????1716??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\cmsis_version.h

?????文件??????97995??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_armv8mbl.h

?????文件?????168914??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_armv8mml.h

?????文件??????42208??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm0.h

?????文件??????50464??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm0plus.h

?????文件??????43456??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm1.h

?????文件?????104628??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm23.h

?????文件?????111854??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm3.h

?????文件?????175600??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm33.h

?????文件?????123607??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm4.h

?????文件?????148588??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_cm7.h

?????文件??????47249??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_sc000.h

?????文件?????110523??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\core_sc300.h

?????文件??????11711??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\mpu_armv7.h

?????文件??????10958??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\mpu_armv8.h

?????文件???????2757??2020-04-22?21:41??STM32L431RC_BearPiUART\Drivers\CMSIS\Include\tz_context.h

?????文件?????212906??2020-04-22?21:45??STM32L431RC_BearPiUART\Drivers\STM32L4xx_HAL_Driver\Inc\Legacy\stm32_hal_legacy.h

?????文件??????34285??2020-04-22?21:45??STM32L431RC_BearPiUART\Drivers\STM32L4xx_HAL_Driver\Inc\stm32l4xx_hal.h

?????文件??????18089??2020-04-22?21:45??STM32L431RC_BearPiUART\Drivers\STM32L4xx_HAL_Driver\Inc\stm32l4xx_hal_cortex.h

?????文件???????7918??2020-04-22?21:45??STM32L431RC_BearPiUART\Drivers\STM32L4xx_HAL_Driver\Inc\stm32l4xx_hal_def.h

............此處省略270個文件信息