PCM9211 DAC issue

Sonu Verma

Other Parts Discussed in Thread: PCM9211, PCM1796

Hello Sir,

In a project working to make a DAC, using PCM9211 to convert digital audio into I2S and PCM1796 to convert I2S data into analog audio...
through my i2c code, PCM9211's register are found coded well on reading back the values, but through same code registers of PCM1796 are set on 0xff instead of values m giving.
I not sure why this happening, giving some detail in brief...

kindly verify where m doing wrong.

PCM9211 Setup is with evm board :-
(i tried same on my board too, issue is same register are codded well but no Dout)
using PCM9211EVM-U board
giving 1KHz digital unbal. signal. via APx515 on RXIN0
checking output on P7 of board but there is no Dout.
using "RXIN0 in MainOutput.txt" script

i checked from either old post, that

"source material copy protected? This might prevent the playback.

Check TXCS2 and RXCS2 in the d/s for more info."

i go through the d/s but its doesn't mention what types of changes it need, is same problem is with me too, if yes then which type of changes it need
or my scripts had any issue.

Fullscreen 0511.RXIN0 in MainOutput.txt Download

#**************************************
#this script is for SPDIF-->RXIN0-->DIR-->MainOutput, Record sound from SPDIF to PC through TAS1020

#So
#1, Chose RXIN0 to DIR
#2, Active DIR
#3, chose DIR output as Mainoutput's source.

#Also HW modification
#1, Flying to High Level(3.3V) to make sure U7's output is Hi-Z
#or 2, TAS1020 output logic high on P1.2 I2S enable signal. 
#**************************************


#System RST Control
#w 80 40 00
w 80 40 33
w 80 40 C0

#XTI Source, Clock (SCK/BCK/LRCK) Frequency Setting
# XTI CLK source 12.288 and BCK 3.072, LRCK 48k = XTI/512
w 80 31 1A
w 80 33 22
w 80 20 00
w 80 24 00
#ADC clock source is chosen by REG42
w 80 26 81

#XTI Source, Secondary Bit/LR Clock (SBCK/SLRCK) Frequency Setting
w 80 33 22


#*********************************************************
#-------------------------------Start DIR settings---------------------------------------
#REG. 21h, DIR Receivable Incoming Biphase's Sampling Frequency Range Setting
w 80 21 00

#REG. 22h, DIR CLKSTP and VOUT delay
w 80 22 01

#REG. 23h, DIR OCS start up wait time and Process for Parity Error Detection and ERROR Release Wait Time Setting
w 80 23 04

# REG 27h DIR Acceptable fs Range Setting & Mask
w 80 27 00

# REG 2Fh, DIR Output Data Format, 24bit I2S mode
w 80 2F 04

# REG. 30h, DIR Recovered System Clock (SCK) Ratio Setting
w 80 30 02

#REG. 32h, DIR Source, Secondary Bit/LR Clock (SBCK/SLRCK) Frequency Setting
w 80 32 22

#REG 34h DIR Input Biphase Signal Source Select and RXIN01 Coaxial Amplifier
#--PWR down amplifier, Select RXIN2
#w 80 34 C0
#--PWR up amplifier, select RXIN0
w 80 34 00
#--PWR up amplifier, select RXIN1
#w 80 34 01

#REG. 37h, Port Sampling Frequency Calculator Measurement Target Setting, Cal and DIR Fs
w 80 37 00
#REG 38h rd DIR Fs
r 80 38 01
#***********************************************************
#------------------------------------ End DIR settings------------------------------------------


#***********************************************************
#---------------------------------Start  MainOutput Settings--------------------------------------
#MainOutput
#REG. 6Ah, Main Output & AUXOUT Port Control
w 80 6A 00
                                                                                                                                                                               
#REG. 6Bh, Main Output Port (SCKO/BCK/LRCK/DOUT) Source Setting
w 80 6B 11

#REG. 6Dh, MPIO_B & Main Output Port Hi-Z Control
w 80 6D 00


#***********************************************************
#------------------------------------ End MainOutput settings------------------------------------------

attaching the scripts kindly have a look.

another issue is with PCM1796,
basic setup of pcm1796 is:-
1. Slave addr for PCM1976 is 0x4c
2. SDA n SCL lines are on share with PCM9211 with 2.7k pullup registers on 3.3v
pin details:-
1.ZeroL and ZeroR are left blank.
2. Msel is 5.0v (I2C mode)
3. LRCK, DATA, BCK, SCk, are connected to pcm9211's pin no. 18,17,19,20 respectively.
4. Vdd is 3.3v
5. MS and MDI is on gnd.
6. MC n MDO are SCL n SDL.
7. RST gnd.
8. VCC2R, VCC2L, VCC1, are on +5v.
9. AGND3L, AGND2, AGND1 are gnd.

feel free to ask any further information about the design.

Regards:-
Sonu Verma

over 12 years ago

0 Don Dapkus over 12 years ago

TI__Guru**** 189401 points

Hi, Sonu,

What if you use other input sources? Do you get DOUT then?

-d2

0 Sonu Verma over 12 years ago in reply to Don Dapkus

Intellectual 450 points

Hi ! Dapkus

Sorry to be lated, after fewer debugging with the input Dout was recovered but other problem regarding value setting of PCM1796 as mentions above are still the same.... using same I2C code of PCM9211 and PCM1796.

attaching a .txt file, how m settings registers of both PCM9211 and PCM1796.
m not ware what special care should be taken with PCM1796 or where going wrong.

Feel free to ask any further info about the setup, or any type of suggestion is highly appreciable

Thanks & Regards:-

Sonu Verma

Fullscreen 6087.main.c Download

#define PCM9211_address 0x40						// slave address for PCM9211
#define PCM1796_address 0x4c						// slave address for PCM1976
void reg_setting()
{
		int i,j;
	    for(j=0;j<10;j++)								// looping for 10 times
	    {

	    	//System Re set Control 40h
	    //	I2C_Write(PCM9211_address,0x40,0x00); 		// power down mode (reseting)
	        I2C_Write(PCM9211_address,0x40,0x33); 		// power down mode (reseting)
	        for(i=0;i<5;i++);							// Small Delay
	        I2C_Write(PCM9211_address,0x40,0xc0);		// normal operation

	        //XTI Source Clock Frequency Setting
	        I2C_Write(PCM9211_address,0x31,0x1a);		//1a LRCK Frequency setting 48 kHz
	           											// BCK Frequency setting 3.072 MHz
	           											// XTI Clock Source Frequency Setting 12.288 MHz

	        // XTI Source, Sec. Bit/LR Clock Frequency Setting
    		I2C_Write(PCM9211_address,0x33,0x22);		// 22XTI Clock Source, Secondary BCK (SBCK) Frequency 6.144 MHz
	        		        											//XTI Clock Source, Secondary LRCK (SLRCK) Frequency 96kHz

	        // ERROR Output Condition and Shared Port Settings
	        I2C_Write(PCM9211_address,0x20,0x00);		//error control default

	        // Oscillation Circuit Control
	        I2C_Write(PCM9211_address,0x24,0x00);		//Osc. Control on default

	        //AUTO Source Selector Cause Setting
	        I2C_Write(PCM9211_address,0x26,0x81);		//XTI clock, PLL lock error

	        // XTI Source, Sec. Bit/LR Clock Frequency Setting
       		I2C_Write(PCM9211_address,0x33,0x22);		// 22XTI Clock Source, Secondary BCK (SBCK) Frequency 6.144 MHz

	        // ADC Function Control 1/3
//	        I2C_Write(PCM9211_address,0x42,0x02);		//ADC Clock Source (SCK/BCK/LRCK):- XTI
	        I2C_Write(PCM9211_address,0x21, 0x00);	//n
	        I2C_Write(PCM9211_address,0x22, 0x01);
	        I2C_Write(PCM9211_address,0x23, 0x04);
	        I2C_Write(PCM9211_address,0x27, 0x00);
	        I2C_Write(PCM9211_address,0x2F, 0x04); 	
	        I2C_Write(PCM9211_address,0x30, 0x02);
	        I2C_Write(PCM9211_address,0x32, 0x22);
	
	        I2C_Write(PCM9211_address,0x34, 0x00);	//n
	
	        I2C_Write(PCM9211_address,0x37, 0x00);
	        I2C_Write(PCM9211_address,0x38, 0x01);	//n
	        I2C_Write(PCM9211_address,0x6A, 0x00);
	        I2C_Write(PCM9211_address,0x6B, 0x11);
	        I2C_Write(PCM9211_address,0x6D, 0x00);
	        I2C_Write(PCM9211_address,0x63, 0x04);
	        I2C_Write(PCM9211_address,0x5A, 0x04);
    
        
			reg_value = I2C_Read(PCM9211_address,0x34);
		
		
		
	    	I2C_Write(PCM1796_address,0x10,0xff);
	     	I2C_Write(PCM1796_address,0x11,0xff);
			I2C_Write(PCM1796_address,0x12,0x50);
    	    I2C_Write(PCM1796_address,0x13,0x04);
	    	I2C_Write(PCM1796_address,0x11,0x10);
    	    I2C_Write(PCM1796_address,0x10,0x00);	 
    	// reading register to ensure integrity    	
    	    _regvalue=I2C_Read(PCM1796_address,0x12);	    	
	    }
}

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PCM9211 DAC issue