version 4.2.0

[fx2fw-sdcc] / eeprom.c

diff --git a/eeprom.c b/eeprom.c
index fc1f319..4bb377d 100644 (file)
--- a/eeprom.c
+++ b/eeprom.c
@@ -1,154 +1,77 @@
 /*-----------------------------------------------------------------------------\r
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  * FTDI EEPROM emulation\r
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  *-----------------------------------------------------------------------------\r
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  * Copyright (C) 2007 Kolja Waschk, ixo.de\r
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  *-----------------------------------------------------------------------------\r
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  * This code is part of usbjtag. usbjtag is free software; you can redistribute\r
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  * it and/or modify it under the terms of the GNU General Public License as\r
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  * published by the Free Software Foundation; either version 2 of the License,\r
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  * or (at your option) any later version. usbjtag is distributed in the hope\r
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  * that it will be useful, but WITHOUT ANY WARRANTY; without even the implied\r
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  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
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  * GNU General Public License for more details.  You should have received a\r
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  * copy of the GNU General Public License along with this program in the file\r
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  * COPYING; if not, write to the Free Software Foundation, Inc., 51 Franklin\r
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  * St, Fifth Floor, Boston, MA  02110-1301  USA\r
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  *-----------------------------------------------------------------------------\r
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  */\r
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 #include "eeprom.h"\r
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 #include "usb_descriptors.h"\r
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 xdata unsigned char eeprom[128];\r
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 extern xdata char dscr_vidpidver[6];\r
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 extern xdata char dscr_attrpow[2];\r
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 extern xdata char dscr_usbver[2];\r
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 extern xdata char dscr_strorder[4];\r
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 extern xdata char str1[];\r
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 extern xdata char str2[];\r
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 extern xdata char str3[];\r
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 static unsigned char ee_ptr;\r
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 static unsigned short ee_cksum;\r
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 void eeprom_append(unsigned char nb)\r
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 {\r
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   unsigned char pree_ptr = ee_ptr & ~1;\r
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   if(pree_ptr != ee_ptr)\r
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   {\r
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     ee_cksum = ee_cksum ^((unsigned short)nb << 8);\r
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     ee_cksum = ee_cksum ^ eeprom[pree_ptr];\r
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     ee_cksum = (ee_cksum << 1) | (ee_cksum >> 15);\r
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   };\r
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   eeprom[ee_ptr++] = nb;\r
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 }\r
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 void eeprom_init(void)\r
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 {\r
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   char j,sofs;\r
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   ee_ptr = 0;\r
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   ee_cksum = 0xAAAA;\r
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   eeprom_append(0x00);\r
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   eeprom_append(0x00);\r
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   for(j=0;j<6;j++) eeprom_append(dscr_vidpidver[j]);\r
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   for(j=0;j<2;j++) eeprom_append(dscr_attrpow[j]);\r
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   eeprom_append(0x1C);\r
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   eeprom_append(0x00);\r
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   for(j=0;j<2;j++) eeprom_append(dscr_usbver[j]);\r
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   sofs = 0x80 + ee_ptr + 6;\r
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   eeprom_append(sofs);\r
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   eeprom_append(str1[0]);\r
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   sofs += str1[0];\r
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   eeprom_append(sofs);\r
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   eeprom_append(str2[0]);\r
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   sofs += str2[0];\r
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   eeprom_append(sofs);\r
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   eeprom_append(str3[0]);\r
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   for(j=0;j<str1[0];j++) eeprom_append(str1[j]);\r
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   for(j=0;j<str2[0];j++) eeprom_append(str2[j]);\r
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   for(j=0;j<str3[0];j++) eeprom_append(str3[j]);\r
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   for(j=0;j<4;j++) eeprom_append(dscr_strorder[j]);\r
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   while(ee_ptr < 126) eeprom_append(0);\r
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   eeprom[126] = ee_cksum&0xFF;\r
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   eeprom[127] = (ee_cksum>>8)&0xFF;\r
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 }\r
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