Sertel_Srinath Gopalan / USB_Log_Drive

Sertel USB Log

Fork of MSCFileSystem by Chris Styles

MSCFileSystem.cpp@0:3e7d2baed4b4, 2011-04-05 (annotated)

Committer:
chris
Date:
Tue Apr 05 23:36:08 2011 +0000
Revision:
0:3e7d2baed4b4

        

        
Who changed what in which revision?

        

            
                
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/* USB Mass Storage device file system





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 * Copyrigh (c) 2010, Igor Skochinsky





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 * based on SDFileStorage





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 * Copyright (c) 2008-2009, sford





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 */





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/* Introduction





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 * ------------





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 * TODO: write one





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 * we're basically using NXP's USBHotLite sample code, just plugging in our own FAT library





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 */





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#include "MSCFileSystem.h"





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#include "usbhost_inc.h"





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MSCFileSystem::MSCFileSystem(const char* name) :





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  FATFileSystem(name)





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{





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}





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void print_inquiry(USB_INT08U *inqReply)





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{





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    // see USB Mass Storage Class – UFI Command Specification,





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    // 4.2 INQUIRY Command





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    printf("Inquiry reply:\n");





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    uint8_t tmp = inqReply[0]&0x1F;





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    printf("Peripheral device type: %02Xh\n", tmp);





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    if ( tmp == 0 )





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        printf("\t- Direct access (floppy)\n");





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    else if ( tmp == 0x1F )





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        printf("\t- none (no FDD connected)\n");





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    else





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        printf("\t- unknown type\n");





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    tmp = inqReply[1] >> 7;





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    printf("Removable Media Bit: %d\n", tmp);





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    tmp = inqReply[2] & 3;





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    printf("ANSI Version: %02Xh\n", tmp);





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    if ( tmp != 0 )





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        printf("\t- warning! must be 0\n");





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    tmp = (inqReply[2]>>3) & 3;





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    printf("ECMA Version: %02Xh\n", tmp);





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    if ( tmp != 0 )





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        printf("\t- warning! should be 0\n");





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    tmp = inqReply[2]>>6;





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    printf("ISO Version: %02Xh\n", tmp);





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    if ( tmp != 0 )





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        printf("\t- warning! should be 0\n");





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    tmp = inqReply[3] & 0xF;





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    printf("Response Data Format: %02Xh\n", tmp);





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    if ( tmp != 1 )





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        printf("\t- warning! should be 1\n");





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    tmp = inqReply[4];





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    printf("Additional length: %02Xh\n", tmp);





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    if ( tmp != 0x1F )





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        printf("\t- warning! should be 1Fh\n");





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    printf("Vendor Information: '%.8s'\n", &inqReply[8]);





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    printf("Product Identification: '%.16s'\n", &inqReply[16]);





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    printf("Product Revision: '%.4s'\n", &inqReply[32]);        





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}





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int MSCFileSystem::initialise_msc()





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{





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    USB_INT32S  rc;





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    USB_INT08U  inquiryResult[INQUIRY_LENGTH];





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    //print_clock();





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





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    rc = Host_EnumDev();       /* Enumerate the device connected                                            */





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    if (rc != OK)





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    {





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        fprintf(stderr, "Could not enumerate device: %d\n", rc);





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        return rc;





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    }





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    /* Initialize the mass storage and scsi interfaces */





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    rc = MS_Init( &_blkSize, &_numBlks, inquiryResult );





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    if (rc != OK)





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    {





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        fprintf(stderr, "Could not initialize mass storage interface: %d\n", rc);





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        return rc;





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    }





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    printf("Successfully initialized mass storage interface; %d blocks of size %d\n", _numBlks, _blkSize);





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    print_inquiry(inquiryResult);





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    // FATFileSystem supports only 512-byte blocks





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    return _blkSize == 512 ? OK : 1;





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}





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int MSCFileSystem::disk_initialize()





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{





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    if ( initialise_msc() != OK )





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        return 1;





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    return 0;





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}





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int MSCFileSystem::disk_write(const char *buffer, int block_number)





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{





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    if ( OK == MS_BulkSend(block_number, 1, (USB_INT08U *)buffer) )





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        return 0;





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    return 1;





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}





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int MSCFileSystem::disk_read(char *buffer, int block_number)





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{





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    if ( OK == MS_BulkRecv(block_number, 1, (USB_INT08U *)buffer) )





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        return 0;





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    return 1;





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}





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int MSCFileSystem::disk_status() { return 0; }





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int MSCFileSystem::disk_sync() { return 0; }





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int MSCFileSystem::disk_sectors() { return _numBlks; }