From 3e3e4be2a3a0e9ea4186a616f53fa15083b2214f Mon Sep 17 00:00:00 2001
From: Zach Eveland <zeveland@blacklabel-development.com>
Date: Thu, 11 Aug 2011 10:31:39 -0400
Subject: diskloader source and binary for 32u4

---
 bootloaders/diskloader/src/ThinFAT.cpp | 130 +++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 bootloaders/diskloader/src/ThinFAT.cpp

(limited to 'bootloaders/diskloader/src/ThinFAT.cpp')

diff --git a/bootloaders/diskloader/src/ThinFAT.cpp b/bootloaders/diskloader/src/ThinFAT.cpp
new file mode 100644
index 0000000..c238741
--- /dev/null
+++ b/bootloaders/diskloader/src/ThinFAT.cpp
@@ -0,0 +1,130 @@
+
+
+/* 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
\ No newline at end of file
-- 
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