Procyon ARMlib: aic23b.c Source File

00001 /*! \file aic23b.c \brief TI TLV320AIC23B Audio Codec Driver. */
00002 //*****************************************************************************
00003 //
00004 // File Name    : 'aic23b.c'
00005 // Title        : TI TLV320AIC23B Audio Codec Driver
00006 // Author       : Pascal Stang - Copyright (C) 2004
00007 // Created      : 2004.05.05
00008 // Revised      : 2004.07.12
00009 // Version      : 0.1
00010 // Target MCU   : ARM processors
00011 // Editor Tabs  : 4
00012 //
00013 // NOTE: This code is currently below version 1.0, and therefore is considered
00014 // to be lacking in some functionality or documentation, or may not be fully
00015 // tested.  Nonetheless, you can expect most functions to work.
00016 //
00017 // This code is distributed under the GNU Public License
00018 //      which can be found at http://www.gnu.org/licenses/gpl.txt
00019 //
00020 //*****************************************************************************
00021 
00022 #include "global.h"
00023 #include "i2c.h"
00024 #include "at91sam7s64.h"
00025 #include "processor.h"
00026 #include "aic23b.h"
00027 
00028 // Sin wave table (256 steps, 16-bit output)
00029 signed short SinTable256_16[] = {
00030      0,    804,   1608,   2410,   3212,   4011,   4808,   5602, 
00031   6393,   7179,   7962,   8739,   9512,  10278,  11039,  11793, 
00032  12539,  13279,  14010,  14732,  15446,  16151,  16846,  17530, 
00033  18204,  18868,  19519,  20159,  20787,  21403,  22005,  22594, 
00034  23170,  23731,  24279,  24811,  25329,  25832,  26319,  26790, 
00035  27245,  27683,  28105,  28510,  28898,  29268,  29621,  29956, 
00036  30273,  30571,  30852,  31113,  31356,  31580,  31785,  31971, 
00037  32137,  32285,  32412,  32521,  32609,  32678,  32728,  32757, 
00038  32767,  32757,  32728,  32678,  32609,  32521,  32412,  32285, 
00039  32137,  31971,  31785,  31580,  31356,  31113,  30852,  30571, 
00040  30273,  29956,  29621,  29268,  28898,  28510,  28105,  27683, 
00041  27245,  26790,  26319,  25832,  25329,  24811,  24279,  23731, 
00042  23170,  22594,  22005,  21403,  20787,  20159,  19519,  18868, 
00043  18204,  17530,  16846,  16151,  15446,  14732,  14010,  13279, 
00044  12539,  11793,  11039,  10278,   9512,   8739,   7962,   7179, 
00045   6393,   5602,   4808,   4011,   3212,   2410,   1608,    804, 
00046      0,   -804,  -1608,  -2410,  -3212,  -4011,  -4808,  -5602, 
00047  -6393,  -7179,  -7962,  -8739,  -9512, -10278, -11039, -11793, 
00048 -12539, -13279, -14010, -14732, -15446, -16151, -16846, -17530, 
00049 -18204, -18868, -19519, -20159, -20787, -21403, -22005, -22594, 
00050 -23170, -23731, -24279, -24811, -25329, -25832, -26319, -26790, 
00051 -27245, -27683, -28105, -28510, -28898, -29268, -29621, -29956, 
00052 -30273, -30571, -30852, -31113, -31356, -31580, -31785, -31971, 
00053 -32137, -32285, -32412, -32521, -32609, -32678, -32728, -32757, 
00054 -32767, -32757, -32728, -32678, -32609, -32521, -32412, -32285, 
00055 -32137, -31971, -31785, -31580, -31356, -31113, -30852, -30571, 
00056 -30273, -29956, -29621, -29268, -28898, -28510, -28105, -27683, 
00057 -27245, -26790, -26319, -25832, -25329, -24811, -24279, -23731, 
00058 -23170, -22594, -22005, -21403, -20787, -20159, -19519, -18868, 
00059 -18204, -17530, -16846, -16151, -15446, -14732, -14010, -13279, 
00060 -12539, -11793, -11039, -10278,  -9512,  -8739,  -7962,  -7179, 
00061  -6393,  -5602,  -4808,  -4011,  -3212,  -2410,  -1608,   -804, 
00062 };
00063 
00064 
00065 void aicInit(void)
00066 {
00067     i2cInit();
00068 
00069     aicWriteReg(AIC_REG_RESET);
00070     aicWriteReg(AIC_REG_POWERDOWN | BIT(AIC_PD_MIC));
00071     aicWriteReg(AIC_REG_ANALOG_PATH | BIT(AIC_AP_DAC));
00072     aicWriteReg(AIC_REG_DIGITAL_PATH | BIT(AIC_DP_DEEMP1));
00073 
00074     // preset volume
00075     aicSetVolumeHp(5);
00076 }
00077 
00078 int aicWriteReg(u16 regdata)
00079 {
00080     u08 packet[2];
00081     packet[0] = regdata>>8;
00082     packet[1] = regdata;
00083     if(i2cMasterSend(AIC_I2C_ADDR>>1, 2, packet) == I2C_OK)
00084         return TRUE;
00085     else
00086         return FALSE;
00087 }
00088 
00089 void aicSetVolumeLineIn(u08 volume)
00090 {
00091     // limit and bitmask
00092     volume = MIN(volume,31);
00093     volume &= 0x001F;
00094     // write to left and right channel
00095     aicWriteReg(AIC_REG_VOL_LINEIN_LEFT |
00096         volume | BIT(AIC_VLIL_LIM) | BIT(AIC_VLIL_LRS));
00097 }
00098 
00099 void aicSetVolumeHp(u08 volume)
00100 {
00101     // add mute offset
00102     volume += 0x30;
00103     // limit and bitmask
00104     volume = MIN(volume,127);
00105     volume &= 0x007F;
00106     // write to left and right channel
00107     aicWriteReg(AIC_REG_VOL_HP_LEFT |
00108         volume | BIT(AIC_VHPL_LZC) | BIT(AIC_VHPL_LRS));
00109 }
00110 
00111 void aicDigitalEnable(void)
00112 {
00113     // setup digital data format
00114     aicWriteReg(AIC_REG_INTERFACE_FORMAT|
00115         BIT(AIC_IF_MS)|
00116         AIC_IF_16BIT|
00117         AIC_IF_MSBL);
00118 
00119     // set sample rate
00120     aicWriteReg(AIC_REG_SAMPLE_RATE |
00121         BIT(AIC_SR_CLKIN) | BIT(AIC_SR_CLKOUT) | AIC_SR_18432_48KHZ);
00122 
00123     // activate digital interface
00124     aicWriteReg(AIC_REG_DIGITAL_IF_ACT | 0x01);
00125 }