STM32CubeMX+LCD1602 + PCF8574AT

/**
  ******************************************************************************
  * @file    system_stm32f0xx.c
  * @author  MCD Application Team
  * @version V2.3.0
  * @date    27-May-2016
  * @brief   CMSIS Cortex-M0 Device Peripheral Access layer System Source File.
  *
  * 1. 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_stm32f0xx.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 （8 MHz） is used as system clock source.
  *    Then SystemInit（） function is called in “startup_stm32f0xx.s“ file to
  *    configure the system clock before to branch to main program.
  *
  * 3. This file configures the system clock as follows:
  *=============================================================================
  *                         Supported STM32F0xx device
  *-----------------------------------------------------------------------------
  *        System Clock source                    | HSI
  *-----------------------------------------------------------------------------
  *        SYSCLK（Hz）                             | 8000000
  *-----------------------------------------------------------------------------
  *        HCLK（Hz）                               | 8000000
  *-----------------------------------------------------------------------------
  *        AHB Prescaler                          | 1
  *-----------------------------------------------------------------------------
  *        APB1 Prescaler                         | 1
  *-----------------------------------------------------------------------------
  *=============================================================================
  ******************************************************************************
  * @attention
  *
  * 
© COPYRIGHT（c） 2016 STMicroelectronics

  *
  * Redistribution and use in source and binary forms with or without modification
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice
  *      this list of conditions and

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602TEST1602
     文件        5336  2017-04-18 08:41  cubeMX_TEST_1602TEST1602.mxproject
     目录           0  2017-04-17 10:56  cubeMX_TEST_1602TEST1602Drivers
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602TEST1602DriversCMSIS
     目录           0  2017-04-17 10:56  cubeMX_TEST_1602TEST1602DriversCMSISDevice
     目录           0  2017-04-17 10:56  cubeMX_TEST_1602TEST1602DriversCMSISDeviceST
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xx
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxInclude
     文件      430248  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f030x6.h
     文件      434939  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f030x8.h
     文件      469727  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f030xc.h
     文件      455760  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f031x6.h
     文件      452642  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f038xx.h
     文件      911588  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f042x6.h
     文件      908178  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f048xx.h
     文件      551517  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f051x8.h
     文件      548399  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f058xx.h
     文件      450442  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f070x6.h
     文件      466259  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f070xb.h
     文件      603770  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f071xb.h
     文件      963659  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f072xb.h
     文件      960842  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f078xx.h
     文件     1019688  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f091xc.h
     文件     1016552  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f098xx.h
     文件        9964  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludestm32f0xx.h
     文件        3790  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxIncludesystem_stm32f0xx.h
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxSource
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxSourceTemplates
     目录           0  2017-04-18 08:41  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxSourceTemplatesarm
     文件       10856  2016-10-20 10:04  cubeMX_TEST_1602TEST1602DriversCMSISDeviceSTSTM32F0xxSourceTemplatesarmstartup_stm32f030x8.s
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