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基于STM32F4、VGUS的电子称制作,代码亲测可靠,欢迎下载参考!
代码片段和文件信息
/**
******************************************************************************
* @file system_stm32f4xx.c
* @author MCD Application Team
* @version V1.8.0
* @date 09-November-2016
* @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 114403 2016-11-05 01:33 DZC\DZC_STM\CMSIS\core_cm4.h
文件 18323 2016-11-05 01:33 DZC\DZC_STM\CMSIS\core_cmFunc.h
文件 27908 2016-11-05 01:33 DZC\DZC_STM\CMSIS\core_cmInstr.h
文件 22947 2016-11-05 01:33 DZC\DZC_STM\CMSIS\core_cmSimd.h
文件 29696 2016-11-07 23:02 DZC\DZC_STM\CMSIS\startup_stm32f40xx.s
文件 940126 2017-11-25 00:17 DZC\DZC_STM\CMSIS\stm32f4xx.h
文件 61019 2017-11-22 11:48 DZC\DZC_STM\CMSIS\system_stm32f4xx.c
文件 2235 2016-11-07 23:03 DZC\DZC_STM\CMSIS\system_stm32f4xx.h
文件 5851 2016-11-09 02:19 DZC\DZC_STM\Driver\stm32f4xx_conf.h
文件 4581 2017-11-22 01:17 DZC\DZC_STM\Driver\stm32f4xx_it.c
文件 2224 2016-11-09 02:19 DZC\DZC_STM\Driver\stm32f4xx_it.h
文件 6926 2016-11-05 01:33 DZC\DZC_STM\Library\inc\misc.h
文件 6926 2016-11-05 01:33 DZC\DZC_STM\Library\inc\misc_1.h
文件 33008 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_adc.h
文件 33008 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_adc_1.h
文件 27849 2016-11-08 23:33 DZC\DZC_STM\Library\inc\stm32f4xx_can.h
文件 27849 2016-11-08 23:33 DZC\DZC_STM\Library\inc\stm32f4xx_can_1.h
文件 12446 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_cec.h
文件 12446 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_cec_1.h
文件 2418 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_crc.h
文件 2418 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_crc_1.h
文件 14483 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_cryp.h
文件 14483 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_cryp_1.h
文件 14948 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_dac.h
文件 14948 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_dac_1.h
文件 4298 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_dbgmcu.h
文件 4298 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_dbgmcu_1.h
文件 12979 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_dcmi.h
文件 12979 2016-11-05 01:33 DZC\DZC_STM\Library\inc\stm32f4xx_dcmi_1.h
文件 46290 2016-11-09 01:41 DZC\DZC_STM\Library\inc\stm32f4xx_dfsdm.h
............此处省略325个文件信息
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