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/* Copyright (c) 2011, Peter Barrett
**
** Permission to use, copy, modify, and/or distribute this software for
** any purpose with or without fee is hereby granted, provided that the
** above copyright notice and this permission notice appear in all copies.
**
** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
** BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
** OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
** WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
** ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
** SOFTWARE.
*/
#include "Platform.h"
#ifdef MSC_ENABLED
extern const u8 Sector_0[] PROGMEM;
extern const u8 Sector_1[] PROGMEM;
extern const u8 Sector_2[] PROGMEM;
extern const u8 Sector_3[] PROGMEM;
extern const u8 Sector_Size[] PROGMEM;
const u8 Sector_0[27] =
{
0xEB,0x3C,0x90,
FAT_OEM_NAME,
0x00,0x02, // Bytes per sector 512
0x40, // Sectors per Cluster 32k per cluster
0x01,0x00, // Reserved sectors
0x02, // FATSs
0x10,0x00, // root entries
4+64,0x00, // number of sectors: 30k file
0xF8, // Media type fixed
0x01,0x00, // Sectors per FAT
0x01,0x00, // Sectors per head
0x01,//0x00, // Heads per cylinder
//0x00,0x00,0x00,0x00, // Hidden
//0x00,0x00,0x00,0x00, // long number of sectors
//0x00,0x00, // Ext flags
// 38 bytes
};
// FAT12 clusters for 32k file
const u8 Sector_1[] =
{
#if 0
0xF8,0xFF,0xFF,
0xFF,0x0F//,0x00
#endif
};
const u8 Sector_2[] =
{
};
const u8 Sector_3[] =
{
#if 0
FAT_FILE_NAME, 0x00,0x00,0x00,0x00,0x00, // Uppercase name please
0x43,0x3E,0x43,0x3E,0x00,0x00,0xAB,0x8C,0x40,0x3E,0x02,0x00,0x00,0x80,//0x00,0x00
// 0x00,0x00,
#endif
#ifdef FAT_DISK_LABEL
FAT_DISK_LABEL,0x28
#endif
};
#if 0
const u8 Sector_Size[] =
{
0,
sizeof(Sector_0),
sizeof(Sector_0) + sizeof(Sector_1),
sizeof(Sector_0) + sizeof(Sector_1) + sizeof(Sector_2),
sizeof(Sector_0) + sizeof(Sector_1) + sizeof(Sector_2) + sizeof(Sector_3)
};
#endif
const u8* LBAToROM(u8 b)
{
b -= 4;
return (const u8*)(b << 9);
}
void SendSector(u8 b)
{
if (b == 0)
{
u8 n = sizeof(Sector_0);
Transfer(MSC_TX | TRANSFER_PGM,Sector_0,n);
Transfer(MSC_TX | TRANSFER_ZERO,0,512-n);
return;
}
if ((b < 4) || (b >= 64))
{
Transfer(MSC_TX | TRANSFER_ZERO,0,512);
return;
}
// Copy body of file from ROM
Transfer(MSC_TX | TRANSFER_PGM,LBAToROM(b),512);
}
#define GENERATE_INVALID_ROM_ADDRESS 60
void RecvSector(u8 lba)
{
if ((lba < 4) || (lba >= 64))
lba = GENERATE_INVALID_ROM_ADDRESS; // Only care about the first 30k
// Write sectors to flash
u16 addr = (u16)LBAToROM(lba); // may generate out of range addresses, Program will fix
u8 i = 4; // 4x128 is a sector
while (i--)
{
Program(MSC_RX,addr,128);
addr += 128;
}
}
#endif
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