Hello Qingwei,
I consulted SGTL5000 datasheet on how to program DAP, and found your steps are not complete.
1. See DAP diagram
We should pay attention to notes about PEQ/GEQ/TC: Only one of them can work simultaneously, so you can only use one, but not more.
2. See example code of DAP
You had better carefully read these example code and understand them, see page27, let me paste parts of them here:
--Input/Output Routing( input / output of DAP )
To avoid any pops/clicks, the outputs should be muted during these chip configuration steps. Refer to Volume Control for volume and mute control.
A few example routes are shown below:
// Example 1: I2S_IN -> DAP -> DAC -> LINEOUT, HP_OUT
// Route I2S_IN to DAP
Modify CHIP_SSS_CTRL->DAP_SELECT 0x0001 // bits 7:6
// Route DAP to DAC
Modify CHIP_SSS_CTRL->DAC_SELECT 0x0003 // bits 5:4
// Select DAC as the input to HP_OUT
Modify CHIP_ANA_CTRL->SELECT_HP 0x0000 // bit 6
// Example 2: MIC_IN -> ADC -> I2S_OUT
// Set ADC input to MIC_IN
Modify CHIP_ANA_CTRL->SELECT_ADC 0x0000 // bit 2
// Route ADC to I2S_OUT
Modify CHIP_SSS_CTRL->I2S_SELECT 0x0000 // bits 1:0
// Example 3: LINEIN -> HP_OUT
// Select LINEIN as the input to HP_OUT
Modify CHIP_ANA_CTRL->SELECT_HP 0x0001 // bit 6
***DIGITAL AUDIO PROCESSOR CONFIGURATION
To avoid any pops/clicks, the outputs should be muted during these chip configuration steps. Refer to Volume Control for volume and mute control.
// Enable DAP block
// NOTE: DAP will be in a pass-through mode if none of DAP
// sub-blocks are enabled.
Modify DAP_CONTROL->DAP_EN 0x0001 // bit 0
----Dual Input Mixer
These programming steps are needed only if dual input mixer feature is used.
// Enable Dual Input Mixer
Modify DAP_CONTROL->MIX_EN 0x0001 // bit 4
// NOTE: This example assumes mix level of main and mix
// channels as 100% and 50% respectively
// Configure main channel volume to 100% (No change from input
// level)
Write DAP_MAIN_CHAN 0x4000
// Configure mix channel volume to 50% (attenuate the mix
// input level by half)
Write DAP_MIX_CHAN 0x4000
----Freescale Surround
The Freescale Surround on/off function is typically controlled by the end-user. End-user driven programming steps are shown in End-user Driven Chip Configuration.
The default WIDTH_CONTROL of 4 should be appropriate for most applications. This optional programming step shows how to configure a different width value.
// Configure the surround width
// (0x0 = Least width, 0x7 = Most width). This example shows
// a width setting of 5
Modify DAP_SGTL_SURROUND->WIDTH_CONTROL 0x0005
// bits 6:4
----7-Band Parametric EQ / 5-Band Graphic EQ / Tone Control
Only one audio EQ block can be used at a given time. The pseudocode in this section shows how to select each block.
Some parameters of the audio EQ are typically controlled by the end-user. End-user driven programming steps are shown in End-user Driven Chip Configuration.
// 7-Band PEQ Mode
// Select 7-Band PEQ mode and enable 7 PEQ filters
Write DAP_AUDIO_EQ 0x0001
Write DAP_PEQ 0x0007
// Tone Control mode
Write DAP_AUDIO_EQ 0x0002
// 5-Band GEQ Mode
Write DAP_AUDIO_EQ 0x0003
----Automatic Volume Control (AVC)
The AVC on/off function is typically controlled by the end-user. End-user driven programming steps are shown in End-user Driven Chip Configuration.
The default configuration of the AVC should work for most applications. However, the following example shows how to change the configuration if needed.
// Configure threshold to -18dB
Write DAP_AVC_THRESHOLD 0x0A40
// Configure attack rate to 16dB/s
Write DAP_AVC_ATTACK 0x0014
// Configure decay rate to 2dB/s
Write DAP_AVC_DECAY 0x0028
From example code, except setting DAP_EN, each sub-block of DAP should also be configured, so please read them and re-debug your codec.
Best Regards,
Weidong
