资源简介
基于STM32F4 的智能手环源程序 该程序可以实现测量心率、血压、步数、以及温湿度、等等
代码片段和文件信息
/**
******************************************************************************
* @file system_stm32f4xx.c
* @author MCD Application Team
* @version V1.4.0
* @date 04-August-2014
* @brief CMSIS Cortex-M4 Device Peripheral Access layer System Source File.
* This file contains the system clock configuration for STM32F4xx devices.
*
* 1. This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): Setups the system clock (System clock source PLL Multiplier
* and Divider factors AHB/APBx prescalers and Flash settings)
* depending on the configuration made in the clock xls tool.
* This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the “startup_stm32f4xx.s“ file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK) it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* 2. After each device reset the HSI (16 MHz) is used as system clock source.
* Then SystemInit() function is called in “startup_stm32f4xx.s“ file to
* configure the system clock before to branch to main program.
*
* 3. If the system clock source selected by user fails to startup the SystemInit()
* function will do nothing and HSI still used as system clock source. User can
* add some code to deal with this issue inside the SetSysClock() function.
*
* 4. The default value of HSE crystal is set to 25MHz refer to “HSE_VALUE“ define
* in “stm32f4xx.h“ file. When HSE is used as system clock source directly or
* through PLL and you are using different crystal you have to adapt the HSE
* value to your own configuration.
*
* 5. This file configures the system clock as follows:
*=============================================================================
*=============================================================================
* Supported STM32F40xxx/41xxx devices
*-----------------------------------------------------------------------------
* System Clock source | PLL (HSE)
*-----------------------------------------------------------------------------
* SYSCLK(Hz) | 168000000
*-----------------------------------------------------------------------------
* HCLK(Hz)
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 109873 2014-05-27 13:46 XYD_Watch\CMSIS\core_cm4.h
文件 22735 2014-07-17 21:52 XYD_Watch\CMSIS\core_cm4_simd.h
文件 17146 2014-07-17 21:52 XYD_Watch\CMSIS\core_cmFunc.h
文件 20513 2014-07-17 21:52 XYD_Watch\CMSIS\core_cmInstr.h
文件 29605 2017-09-25 23:22 XYD_Watch\CMSIS\startup_stm32f40_41xxx.s
文件 704119 2016-08-03 09:31 XYD_Watch\CMSIS\stm32f4xx.h
文件 704095 2014-08-01 22:30 XYD_Watch\CMSIS\stm32f4xx.h~RF1fa727.TMP
文件 47782 2014-08-02 00:06 XYD_Watch\CMSIS\system_stm32f4xx.c
文件 2233 2014-08-01 22:30 XYD_Watch\CMSIS\system_stm32f4xx.h
文件 1527 2015-10-27 12:06 XYD_Watch\DebugConfig\Target_1_STM32F411CEUx.dbgconf
文件 339 2018-09-22 09:25 XYD_Watch\EventRecorderStub.scvd
文件 22434 2019-04-15 11:12 XYD_Watch\Listings\os_cpu_a.lst
文件 77015 2019-04-15 11:12 XYD_Watch\Listings\startup_stm32f40_41xxx.lst
文件 263325 2019-04-15 11:12 XYD_Watch\Listings\XYD_Watch.map
文件 234960 2019-04-15 11:12 XYD_Watch\ob
文件 407 2019-04-15 11:12 XYD_Watch\ob
文件 250084 2019-04-15 11:12 XYD_Watch\ob
文件 288263 2019-04-15 11:12 XYD_Watch\ob
文件 1875 2019-04-15 11:12 XYD_Watch\ob
文件 298964 2019-04-15 11:12 XYD_Watch\ob
文件 289346 2019-04-15 11:12 XYD_Watch\ob
文件 1975 2019-04-15 11:12 XYD_Watch\ob
文件 302752 2019-04-15 11:12 XYD_Watch\ob
文件 277395 2019-04-15 11:12 XYD_Watch\ob
文件 1179 2019-04-15 11:12 XYD_Watch\ob
文件 290672 2019-04-15 11:12 XYD_Watch\ob
文件 234753 2019-04-15 11:12 XYD_Watch\ob
文件 479 2019-04-15 11:12 XYD_Watch\ob
文件 252856 2019-04-15 11:12 XYD_Watch\ob
文件 235926 2019-04-15 11:12 XYD_Watch\ob
............此处省略243个文件信息
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