资源简介
STM32F407/编码器/调速器/定时器/串口
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) | 168000000
*-------------------------
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2017-05-08 21:46 DRVBD_TestSource(2017.5.08)\
目录 0 2017-05-08 21:10 DRVBD_TestSource(2017.5.08)\CMSIS\
文件 107370 2017-05-08 21:09 DRVBD_TestSource(2017.5.08)\CMSIS\core_cm4.h
文件 22062 2017-05-08 21:09 DRVBD_TestSource(2017.5.08)\CMSIS\core_cm4_simd.h
文件 16510 2017-05-08 21:09 DRVBD_TestSource(2017.5.08)\CMSIS\core_cmFunc.h
文件 19825 2017-05-08 21:09 DRVBD_TestSource(2017.5.08)\CMSIS\core_cmInstr.h
文件 29171 2017-05-08 21:09 DRVBD_TestSource(2017.5.08)\CMSIS\startup_stm32f40_41xxx.s
文件 695938 2017-05-08 21:10 DRVBD_TestSource(2017.5.08)\CMSIS\stm32f4xx.h
文件 46664 2017-05-08 21:09 DRVBD_TestSource(2017.5.08)\CMSIS\system_stm32f4xx.c
文件 2148 2017-05-08 21:09 DRVBD_TestSource(2017.5.08)\CMSIS\system_stm32f4xx.h
目录 0 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\
目录 0 2017-05-08 21:47 DRVBD_TestSource(2017.5.08)\FWlib\inc\
文件 6746 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\misc.h
文件 32224 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_adc.h
文件 26674 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_can.h
文件 2333 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_crc.h
文件 14097 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_cryp.h
文件 14642 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_dac.h
文件 4187 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_dbgmcu.h
文件 12665 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_dcmi.h
文件 28273 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_dma.h
文件 19217 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_dma2d.h
文件 7829 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_exti.h
文件 23979 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_flash.h
文件 3172 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_flash_ramfunc.h
文件 43781 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_fmc.h
文件 26506 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_fsmc.h
文件 23046 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_gpio.h
文件 9827 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_hash.h
文件 31228 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_i2c.h
文件 4192 2017-05-08 21:20 DRVBD_TestSource(2017.5.08)\FWlib\inc\stm32f4xx_iwdg.h
............此处省略268个文件信息
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