3 * Copyright 2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 #include "eeprom_io.h"
27 // returns non-zero if successful, else 0
29 eeprom_read (unsigned char i2c_addr, unsigned char eeprom_offset,
30 xdata unsigned char *buf, unsigned char len)
32 // We setup a random read by first doing a "zero byte write".
33 // Writes carry an address. Reads use an implicit address.
35 static xdata unsigned char cmd[1];
36 cmd[0] = eeprom_offset;
37 if (!i2c_write(i2c_addr, cmd, 1))
40 return i2c_read(i2c_addr, buf, len);
46 // returns non-zero if successful, else 0
48 eeprom_write (unsigned char i2c_addr, unsigned char eeprom_offset,
49 const xdata unsigned char *buf, unsigned char len)
51 static xdata unsigned char cmd[2];
55 cmd[0] = eeprom_offset++;
57 ok = i2c_write(i2c_addr, cmd, 2);
58 mdelay(10); // delay 10ms worst case write time