void codec_hw_init(void)
{
// Fortunately, all pins have already been initialized in board.h
// Start the i2c driver
i2cStart(&CODEC_I2C, &i2cfg);
// Reset the codec
codec_hw_reset();
// Write init sequence
// Keep codec powered down initially
codec_pwrCtl(0);
codec_muteCtl(0);
// Auto Detect Clock, MCLK/2
codec_writeReg(0x05, 0x81);
// Slave Mode, I2S Data Format
codec_writeReg(0x06, 0x04);
codec_pwrCtl(1);
codec_volCtl(200);
// Adjust PCM Volume
codec_writeReg(0x1A, 0x0A);
codec_writeReg(0x1B, 0x0A);
// Disable the analog soft ramp
codec_writeReg(0x0A, 0x00);
// Disable the digital soft ramp
codec_writeReg(0x0E, 0x04);
// Disable the limiter attack level
codec_writeReg(0x27, 0x00);
codec_writeReg(0x1C, 0x80);
}
void audio_init(void)
{
int th;
DCC_LOG(LOG_TRACE, "...");
audio_drv.enabled = false;
/* 50 ms jitter buffer */
jitbuf_init(&audio_drv.jitbuf, SAMPLE_RATE,
SAMPLE_RATE, 25);
codec_hw_reset();
tracef("%s(): initializing I2S...", __func__);
i2s_slave_init();
tracef("%s(): initializing TLV320...", __func__);
tlv320_reset();
tlv320_init();
th = thinkos_thread_create((void *)net_rcv_task, (void *)NULL,
net_rcv_stack,
sizeof(net_rcv_stack),
THINKOS_OPT_PRIORITY(1) |
THINKOS_OPT_ID(1));
audio_drv.net_thread = th;
th = thinkos_thread_create((void *)audio_io_task, (void *)NULL,
audio_io_stack,
sizeof(audio_io_stack),
THINKOS_OPT_PRIORITY(0) |
THINKOS_OPT_ID(0));
audio_drv.io_thread = th;
}
void audio_reset(void)
{
bool enable_stream;
tracef("%s(): audio system reset ...", __func__);
enable_stream = audio_drv.stream_enabled;
audio_drv.stream_enabled = false;
codec_hw_reset();
tlv320_reset();
if (audio_drv.enabled)
i2s_disable();
tlv320_init();
if (audio_drv.enabled)
i2s_enable();
audio_drv.stream_enabled = enable_stream;
}
