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Hi,

You look good at C5535 DSP. Chip support library is also including many examples http://software-dl.ti.com/dsps/dsps_public_sw/dsps_swops_houston/C55X/CSL-c55x-lowpower-versions.htm.

Regards,

Hyun

Hi George:

In order for the C5505 programs in C5000 Teaching ROM which use I2S0 on C5505 ezdsp to run on C5535 eZdsp which use I2S2, additional modifications are needed:

1. The External Bus Selection Register (EBSR)  as SYS_EXBUSSEL in aic3204_init.c must be set to 0x1100.

      SYS_EXBUSSEL = 0x1100;

The example in Chapter 1 will work.

Frank L K Wan

I have tried all of the above in the ROM application examples 1 (First Project) and 9 (Guitar Effects) and the program get stuck in the receive interrupt loop shown below. The RcvR bit in the I2S2 interrupt register never gets high. I understand that codec is reset automatically by power good, and enabled by a pull-down on ezDSP C5535 and there is no need to use the GPIO26 for this purpose. Are there any GPIOs to configure? Any idea?Thanks,

void aic3204_codec_read(Int16* left_input, Int16* right_input)

{

  volatile Int16 dummy;

  counter1 = 0;

  /* Read Digital audio inputs */

  while(!(I2S0_IR & RcvR) )

  {

    counter1++;

    // Wait for receive interrupt }

    *left_input = I2S0_W0_MSW_R;

    // Read Most Significant Word of first channel

    dummy = I2S0_W0_LSW_R;

    // Read Least Significant Word (ignore)

    *right_input = I2S0_W1_MSW_R;

    // Read Most Significant Word of second channel

    dummy = I2S0_W1_LSW_R;

    // Read Least Significant Word of second channel (ignore)

}

I need to play the song from USB and SD card for C5535.

i downloaded the project USB / AIC from ti website for C5515.

 i couldn't be able to make the change wat they've said in that site.

In the downloaded project there is no file in the name of the aic3204_init.c and aic3204.c.

if u have the USB memory stick / Audio / SD card project for C5535.please provide the infiormation.

Please kindly help me in this.

Regards

Bala

You are probably refering to the C55x audio Framework http://www.ti.com/tool/c55x-audioframework that uses dspbios. This thread makes reference to the  C5000 Teaching ROM from: http://www.ti.com/ww/eu/university/cd-rom/C5505.zip

Hi George,

This wiki page discusses how to port the C5000 Teaching ROM to the C5535 eZdsp:

http://processors.wiki.ti.com/index.php/Porting_C5000_Teaching_ROM_to_C5535_eZdsp

Thank you for your interest in TI DSPs

Regards,
Mark

I have tried the porting instructions in the ROM application example 9 (Guitar Effects). The program runs, but nothing can be heard, the value of the samples seems to be too low, I guess the audio codec must be configured differently.

I think I found the reason why the ROM applications don't work. The MIC BIAS input must be powered up on the aic3204 for C5535.

I made the changes on example 9 ( Guitar Effects)

The additional changes I had to do to make it work affect only the file aic3205_init.c:

After selecting page 1 of the codec and enabling analog VDD on LDO:

AIC3204_rset( 0, 1 );// Point to page 1

AIC3204_rset( 2, 1 ); // Enable Analog Blocks, use LDO power

The following line must be added:

AIC3204_rset( 51, 0x48);  // power up MICBIAS with AVDD (0x40)or LDOIN (0x48)

This can be done on line 90 inside aic3204_init() function and also on line 233 inside  set_sampling_frequency_and_gain()

Once this is done, the microphone on the C5535 ezDSP starts to work miracolously and the guitar effects can be listened.

Enjoy!!

Hi Diego,

Thanks for posting your solution!

You are absolutely correct that the mic bias needs to be enabled in order to use a PC mic (electret type). I will add this to the wiki page.

In the Teaching ROM presentations, a 600 Ohm dynamic microphone is referenced. These dynamic mics (non-electret) do not require mic bias to produce a signal, but they do require a high mic gain.

Similarly, the pickups on an electric guitar also do not require a MIC BIAS (in my experience), but again the gain needs to be set high.

Hope you are enjoying the eZdsp and Teaching ROM.

Regards,
Mark

I just added the instructions for configuring a microphone as input to the C5535 eZdsp to the Porting C5000 Teaching ROM to C5535 eZdsp wiki page...

http://processors.wiki.ti.com/index.php/Porting_C5000_Teaching_ROM_to_C5535_eZdsp#Configuring_a_Microphone_as_Input_to_the_C5535_eZdsp

Regards,
Mark

I have followed all directions. When I attempt to debug, I get the following error:

Error connecting to the target.

(Error -600 @ 0x0)

A required dynamic library could not be located.

The library isn't on the search path.

(Release 5.0.429)

- First, an error message that reads "something failed" isn't helpful.

- I searched on this error and found a thread that wasn't applicable (to the limits of my unskilled level).

- I am working with Chapter 1 - getting started.

- Any help would be greatly and deeply appreciated.

Thank you

Hi Perry,

Can you post the console output with these errors into a new post?

Thanks,
Mark

Hi,

I tried to run examples of c5505 in my c5535. I changed settings as you told. I programmed my device without no error. But when i tried to listen the results, my windows didn't download software of my device. It said no software found for c5505. But my device is c5535, how can i change and get back my device normal. I think i missed something from things told, i don't get it what it is. Any help will be apreciated.

Best regards,

Ipek

Ok, my issue is solved, i had forgetten to plug sd card.