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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; }
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bruno LARNAUDIE