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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
/// \unit
///
/// !Purpose
///
/// WM8731 driver
///
/// !Usage
///
/// Explanation on the usage of the code made available through the header file.
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "wm8731.h"
#include <board.h>
//------------------------------------------------------------------------------
// Definitions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Internal functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Exported functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Read data from WM8731 Register.
/// \param pTwid pointer to twi driver structure
/// \param device twi slave address
/// \param regAddr register address to read.
//------------------------------------------------------------------------------
unsigned short WM8731_Read(Twid *pTwid,
unsigned int device,
unsigned int regAddr)
{
unsigned short bitsDataRegister;
unsigned char Tdata[2]={0,0};
TWID_Read(pTwid, device, regAddr, 0, Tdata, 2, 0);
bitsDataRegister = (Tdata[0] << 8) | Tdata[1];
return bitsDataRegister;
}
//------------------------------------------------------------------------------
/// Write data to WM8731 Register.
/// \param pTwid pointer to twi driver structure
/// \param device twi slave address
/// \param regAddr register address to read.
/// \param data data to write
//------------------------------------------------------------------------------
void WM8731_Write(Twid *pTwid,
unsigned int device,
unsigned int regAddr,
unsigned short data)
{
unsigned char tmpData[2];
unsigned short tmp;
tmp = ((regAddr & 0x7f) << 9) | (data & 0x1ff);
tmpData[0] = (tmp & 0xff00) >> 8;
tmpData[1] = tmp & 0xff;
TWID_Write(pTwid, device, regAddr, 0, tmpData, 2, 0);
}
//------------------------------------------------------------------------------
/// Init WM8731 to DAC mode.
/// \param pTwid pointer to twi driver structure
/// \param device twi slave address
//------------------------------------------------------------------------------
unsigned char WM8731_DAC_Init(Twid *pTwid,
unsigned int device)
{
// reset
WM8731_Write(pTwid, device, WM8731_REG_RESET, 0);
// analogue audio path control
WM8731_Write(pTwid, device, WM8731_REG_ANALOGUE_PATH_CTRL, 0x12);
// digital audio path control
WM8731_Write(pTwid, device, WM8731_REG_DIGITAL_PATH_CTRL, 0x00);
// power down control
WM8731_Write(pTwid, device, WM8731_REG_PWDOWN_CTRL, 0x7);
// Active control
WM8731_Write(pTwid, device, WM8731_REG_ACTIVE_CTRL, 0x01);
return 0;
}
//------------------------------------------------------------------------------
/// Power down WM8731 DAC.
/// \param pTwid pointer to twi driver structure
/// \param device twi slave address
//------------------------------------------------------------------------------
void WM8731_DAC_PD(Twid *pTwid,
unsigned int device)
{
// power down control
WM8731_Write(pTwid, device, WM8731_REG_PWDOWN_CTRL, 0xf);
}
//------------------------------------------------------------------------------
/// Set WM8731 volume
/// \param pTwid pointer to twi driver structure
/// \param device twi slave address
/// \param register register address
/// \param value register value, valid value is between 0x30 to 0x7f
//------------------------------------------------------------------------------
unsigned char WM8731_VolumeSet(Twid *pTwid,
unsigned int device,
unsigned short value)
{
unsigned short regValue;
value &= WM8731_LHPVOL_BITS;
regValue = WM8731_LRHPBOTH_BIT | WM8731_LZCEN_BIT | value;
WM8731_Write(pTwid, device, WM8731_REG_LEFT_HPOUT, regValue);
regValue = WM8731_RZCEN_BIT | WM8731_RLHPBOTH_BIT | value;
WM8731_Write(pTwid, device, WM8731_REG_RIGHT_HPOUT, value);
return 0;
}
|
