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/* -*- c++ -*- */
/*
* Copyright 2006 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "eeprom_io.h"
#include "i2c.h"
#include "delay.h"
// returns non-zero if successful, else 0
unsigned char
eeprom_read (unsigned char i2c_addr, unsigned char eeprom_offset,
__xdata unsigned char *buf, unsigned char len)
{
// We setup a random read by first doing a "zero byte write".
// Writes carry an address. Reads use an implicit address.
static __xdata unsigned char cmd[1];
cmd[0] = eeprom_offset;
if (!i2c_write(i2c_addr, cmd, 1))
return 0;
return i2c_read(i2c_addr, buf, len);
}
#if 0
// returns non-zero if successful, else 0
unsigned char
eeprom_write (unsigned char i2c_addr, unsigned char eeprom_offset,
const __xdata unsigned char *buf, unsigned char len)
{
static __xdata unsigned char cmd[2];
unsigned char ok;
while (len-- > 0){
cmd[0] = eeprom_offset++;
cmd[1] = *buf++;
ok = i2c_write(i2c_addr, cmd, 2);
mdelay(10); // delay 10ms worst case write time
if (!ok)
return 0;
}
return 1;
}
#endif
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