文件操作与WAV音频播放实验程序解析.doc

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1、//文件操作与WAV音频播放实验程序解析//头文件#include#include"inc/hw_memmap.h"#include"inc/hw_types.h"#include"driverlib/fpu.h"#include"driverlib/gpio.h"#include"driverlib/interrupt.h"#include"driverlib/rom.h"#include"driverlib/sysctl.h"#include"driverlib/systick.h"#in

2、clude"driverlib/pin_map.h"#include"driverlib/ssi.h"#include"grlib/grlib.h"#include"utils/cmdline.h"#include"utils/uartstdio.h"#include"fatfs/src/ff.h"#include"fatfs/src/diskio.h"#include"drivers/cfal96x64x16.h"#include"drivers/buttons.h"//********************

3、*********************************************************//Definesthesizeofthebuffersthatholdthepath,ortemporarydatafrom//theSDcard.Therearetwobuffersallocatedofthissize.Thebuffersize//mustbelargeenoughtoholdthelongestexpectedfullpathname,including//thefilena

4、me,andatrailingnullcharacter.//*****************************************************************************#definePATH_BUF_SIZE80//*****************************************************************************//Definesthesizeofthebufferthatholdsthecommandline

5、.//*****************************************************************************#defineCMD_BUF_SIZE64//*****************************************************************************//Thisbufferholdsthefullpathtothecurrentworkingdirectory.Initially//itisroot("/

6、").//*****************************************************************************staticcharg_cCwdBuf[PATH_BUF_SIZE]="/";//*****************************************************************************//Atemporarydatabufferusedwhenmanipulatingfilepaths,orreadi

7、ngdata//fromtheSDcard.//*****************************************************************************staticcharg_cTmpBuf[PATH_BUF_SIZE];//*****************************************************************************//Aflagtoindicatetheselectbuttonwaspressed./

8、/*****************************************************************************staticvolatileunsignedcharbSelectPressed=0;staticvolatileunsignedcharbUpPressed=0;staticvolatileunsignedcharb