Chris Styles / MSCUsbHost

This is Igors USB Host Mass Storage Class example with main.cpp removed. Import this as files, add your own main.cpp and have all the USB MSC fun you can!

Dependents:   mbedDemoDisplay mbedDemoDisplay MMEx_Challenge

MSCFileSystem.cpp@0:cfb58054ab28, 2010-02-20 (annotated)

Committer:
chris
Date:
Sat Feb 20 08:06:12 2010 +0000
Revision:
0:cfb58054ab28

        

        
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; }