usbhost_main.c

USBHostLite_LPC17xx(FATFS).rar

/*
**************************************************************************************************************
*                                                 NXP USB Host Stack
*
*                                     (c) Copyright 2008, NXP SemiConductors
*                                     (c) Copyright 2008, OnChip  Technologies LLC
*                                                 All Rights Reserved
*
*                                                  www.nxp.com
*                                               www.onchiptech.com
*
* File           : usbhost_main.c
* Programmer(s)  : Ravikanth.P
* Version        :
*
**************************************************************************************************************
*/

/*
**************************************************************************************************************
*                                       INCLUDE HEADER FILES
**************************************************************************************************************
*/

#include  "usbhost_main.h"
#include  "ff.h"
/*
**************************************************************************************************************
*                                          MAIN FUNCTION
*
* Description: This function is the main function where the execution begins
*
* Arguments  : None
*
* Returns    : 
*
**************************************************************************************************************
*/

/* Private variables ---------------------------------------------------------*/
FATFS fs;         /* Work area (file system object) for logical drive */
FIL fsrc;         /* file objects */   
FRESULT res;
UINT br;

char path[512]="0:";
uint8_t textFileBuffer[] = "Thank you for using HY-GoldBull V3.0 Development Board ！^_^ \r\n";   

/* Private function prototypes -----------------------------------------------*/
int SD_TotalSize(void);
FRESULT scan_files (char* path);

/*******************************************************************************
* Function Name  : Delay
* Description    : Delay Time
* Input          : - nCount: Delay Time
* Output         : None
* Return         : None
* Attention		 : None
*******************************************************************************/
void  Delay (uint32_t nCount)
{
  for(; nCount != 0; nCount--);
}


int main()
{
    USB_INT32S  rc;

	SystemInit();                               /* initialize clocks */
 
    UART_Init(115200);         /* Initialize the serial port to view the log messages                       */

	PRINT_Log("*******************************************************************\r\n");
    PRINT_Log("*                                                                 *\r\n");
	PRINT_Log("*  Thank you for using HY-LandTiger V2.0 Development Board ! ^_^  *\r\n");
	PRINT_Log("*                                                                 *\r\n");
	PRINT_Log("*******************************************************************\r\n");

    Host_Init();               /* Initialize the lpc17xx host controller                                    */

	if( Host_EnumDev() == 0 )	/* Enumerate the device connected                                            */
    {
	  PRINT_Log("-- USB device detected OK \r\n");
    }
    else
    {
      PRINT_Log("-- Please connect a USB device \r\n");
      while( Host_EnumDev() == 0 );
      PRINT_Log("-- USB device connection detected \r\n");
	  Delay(0xffffff);
    }

	f_mount(0,&fs);	

	res = f_open( &fsrc , "0:/Demo.TXT" , FA_CREATE_NEW | FA_WRITE);		

    if ( res == FR_OK )
    { 
      /* Write buffer to file */
      res = f_write(&fsrc, textFileBuffer, sizeof(textFileBuffer), &br);     
 
	  PRINT_Log("Demo.TXT successfully created        \r\n");
    
      /*close file */
      f_close(&fsrc);      
    }
    else if ( res == FR_EXIST )
    {
	  PRINT_Log("Demo.TXT created in the disk      \r\n");
    }

	scan_files(path);
	SD_TotalSize();


    while(1);
}

/*******************************************************************************
* Function Name  : scan_files
* Description    : 搜索文件目录下所有文件
* Input          : - path: 根目录
* Output         : None
* Return         : FRESULT
* Attention		 : 不支持长文件名
*******************************************************************************/
FRESULT scan_files (char* path)
{
    FILINFO fno;
    DIR dir;
    int i;
    char *fn;
#if _USE_LFN
    static char lfn[_MAX_LFN * (_DF1S ? 2 : 1) + 1];
    fno.lfname = lfn;
    fno.lfsize = sizeof(lfn);
#endif

    res = f_opendir(&dir, path);
    if (res == FR_OK) {
        i = strlen(path);
        for (;;) {
            res = f_readdir(&dir, &fno);
            if (res != FR_OK || fno.fname[0] == 0) break;
            if (fno.fname[0] == '.') continue;
#if _USE_LFN
            fn = *fno.lfname ? fno.lfname : fno.fname;
#else
            fn = fno.fname;
#endif
            if (fno.fattrib & AM_DIR) {
                sprintf(&path[i], "/%s", fn);
                res = scan_files(path);
                if (res != FR_OK) break;
                path[i] = 0;
            } else {
                PRINT_Log("%s/%s \r\n", path, fn);
            }
        }
    }

    return res;
}


/*******************************************************************************
* Function Name  : SD_TotalSize
* Description    : 文件空间占用情况
* Input          : None
* Output         : None
* Return         : 返回1成功 返回0失败
* Attention		 : None
*******************************************************************************/
int SD_TotalSize(void)
{
    FATFS *fs;
    DWORD fre_clust;        

    res = f_getfree("0:", &fre_clust, &fs);  /* 必须是根目录，选择磁盘0 */
    if ( res==FR_OK ) 
    {
	  /* Print free space in unit of MB (assuming 512 bytes/sector) */
      PRINT_Log("\r\n%d MB total drive space.\r\n"
           "%d MB available.\r\n",
           ( (fs->n_fatent - 2) * fs->csize ) / 2 /1024 , (fre_clust * fs->csize) / 2 /1024 );
		
	  return 0;
	}
	else 
	  return -1;   
}