blob: 066949e2f6d1b483cca3fa2366c91bd4f7c105c7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Miika Pekkarinen
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "system.h"
#include "logf.h"
#include "inttypes.h"
#include "sw_i2c.h"
#include "pcf50606.h"
void sw_i2c_init(void)
{
/* no extra init required */
}
int sw_i2c_write(unsigned char chip, unsigned char location, unsigned char* buf, int count)
{
int i;
pcf50606_i2c_start();
pcf50606_i2c_outb((chip & 0xfe) | SW_I2C_WRITE);
if (!pcf50606_i2c_getack())
{
pcf50606_i2c_stop();
return -1;
}
pcf50606_i2c_outb(location);
if (!pcf50606_i2c_getack())
{
pcf50606_i2c_stop();
return -2;
}
for (i=0; i<count; i++)
{
pcf50606_i2c_outb(buf[i]);
if (!pcf50606_i2c_getack())
{
pcf50606_i2c_stop();
return -3;
}
}
pcf50606_i2c_stop();
return 0;
}
int sw_i2c_read(unsigned char chip, unsigned char location, unsigned char* buf, int count)
{
int i;
pcf50606_i2c_start();
pcf50606_i2c_outb((chip & 0xfe) | SW_I2C_WRITE);
if (!pcf50606_i2c_getack())
{
pcf50606_i2c_stop();
return -1;
}
pcf50606_i2c_outb(location);
if (!pcf50606_i2c_getack())
{
pcf50606_i2c_stop();
return -2;
}
pcf50606_i2c_start();
pcf50606_i2c_outb((chip & 0xfe) | SW_I2C_READ);
if (!pcf50606_i2c_getack())
{
pcf50606_i2c_stop();
return -3;
}
for (i=0; i<count-1; i++)
{
buf[i] = pcf50606_i2c_inb(true);
}
/* 1byte min */
buf[i] = pcf50606_i2c_inb(false);
pcf50606_i2c_stop();
return 0;
}
|
