STM32LL库使用指南工程模板

STM32LL库使用指南，使用手册的工程模板，演示如何使用STM32LL库写STM32底层驱动

/**
  ******************************************************************************
  * @file    system_stm32l4xx.c
  * @author  MCD Application Team
  * @version V1.0.1
  * @date    16-September-2015
  * @brief   CMSIS Cortex-M4 Device Peripheral Access layer System Source File
  *
  *   This file provides two functions and one global variable to be called from
  *   user application:
  *      - SystemInit（）: This function is called at startup just after reset and
  *                      before branch to main program. This call is made inside
  *                      the “startup_stm32l4xx.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.
  *
  *   After each device reset the MSI （4 MHz） is used as system clock source.
  *   Then SystemInit（） function is called in “startup_stm32l4xx.s“ file to
  *   configure the system clock before to branch to main program.
  *
  *   This file configures the system clock as follows:
  *=============================================================================
  *-----------------------------------------------------------------------------
  *        System Clock source                    | MSI
  *-----------------------------------------------------------------------------
  *        SYSCLK（Hz）                             | 4000000
  *-----------------------------------------------------------------------------
  *        HCLK（Hz）                               | 4000000
  *-----------------------------------------------------------------------------
  *        AHB Prescaler                          | 1
  *-----------------------------------------------------------------------------
  *        APB1 Prescaler                         | 1
  *-----------------------------------------------------------------------------
  *        APB2 Prescaler                         | 1
  *-----------------------------------------------------------------------------
  *        PLL_M                                  | 1
  *-----------------------------------------------------------------------------
  *        PLL_N                                  | 8
  *-----------------------------------------------------------------------------
  *        PLL_P                                  | 7
  *-----------------------------------------------------------------------------
  *        PLL_Q                                  | 2
  *-----------------------------------------------------------------------------
  *        PLL_R                                  | 2
 

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件     687089  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l471xx.h

     文件     757340  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l475xx.h

     文件     763407  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l476xx.h

     文件     767856  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l485xx.h

     文件     773923  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l486xx.h

     文件       6535  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l4xx.h

     文件       3827  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Include\system_stm32l4xx.h

     文件      15397  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Release_Notes.html

     文件      20228  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\arm\startup_stm32l471xx.s

     文件      20342  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\arm\startup_stm32l475xx.s

     文件      20415  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\arm\startup_stm32l476xx.s

     文件      20399  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\arm\startup_stm32l485xx.s

     文件      20489  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\arm\startup_stm32l486xx.s

     文件      14145  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\gcc\startup_stm32l471xx.s

     文件      14238  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\gcc\startup_stm32l475xx.s

     文件      14317  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\gcc\startup_stm32l476xx.s

     文件      14321  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\gcc\startup_stm32l485xx.s

     文件      14404  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\gcc\startup_stm32l486xx.s

     文件       1646  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l471xx_flash.icf

     文件       1610  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l471xx_sram.icf

     文件       1646  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l475xx_flash.icf

     文件       1610  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l475xx_sram.icf

     文件       1646  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l476xx_flash.icf

     文件       1610  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l476xx_sram.icf

     文件       1646  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l485xx_flash.icf

     文件       1610  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l485xx_sram.icf

     文件       1646  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l486xx_flash.icf

     文件       1610  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\linker\stm32l486xx_sram.icf

     文件      22471  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\startup_stm32l471xx.s

     文件      22616  2015-10-26 23:00  Drivers\CMSIS\Device\ST\STM32L4xx\Source\Templates\iar\startup_stm32l475xx.s

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