资源简介
使用DCMI驱动OV5640摄像头,拍摄的图像通过DMA传输直接显示在液晶屏上,比对QR-Code库解二维码,结果数据通过串口发送数据到上位机。

代码片段和文件信息
/**
******************************************************************************
* @file system_stm32f4xx.c
* @author MCD Application Team
* @version V1.5.0
* @date 06-March-2015
* @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
----------- --------- ---------- ----- ----
文件 35 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Doc\readme.txt
文件 401 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\keilkill.bat
文件 757993 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Device\ST\STM32F4xx\Include\stm32f4xx.h
文件 2127 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Device\ST\STM32F4xx\Include\system_stm32f4xx.h
文件 30678 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f429_439xx.s
文件 132 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\说明.txt
文件 52052 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\system_stm32f4xx.c
文件 138 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\说明.txt
文件 7115 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\arm_common_tables.h
文件 3861 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\arm_const_structs.h
文件 243652 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\arm_math.h
文件 33340 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cm0.h
文件 40616 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cm0plus.h
文件 98825 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cm3.h
文件 108149 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cm4.h
文件 128130 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cm7.h
文件 16790 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cmFunc.h
文件 25974 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cmInstr.h
文件 22251 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_cmSimd.h
文件 41914 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_sc000.h
文件 97597 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\Include\core_sc300.h
文件 137 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\CMSIS\说明.txt
文件 1162390 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\QR_Decoder\QR-Core.lib
文件 6743 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\STM32F4xx_StdPeriph_Driver\inc\misc.h
文件 32221 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_adc.h
文件 26671 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_can.h
文件 12142 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_cec.h
文件 2330 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_crc.h
文件 14094 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_cryp.h
文件 14639 2016-06-29 15:49 识别二维码\1.程序\QR_Decoder_OV5640\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dac.h
............此处省略147个文件信息
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