Pins Won't Woggle Using I2C on 5509A

mjones

I am trying to use the 5509A I2C peripheral in a non-DSP/BIOS project.

I have attempted to use the CSL and I have attempted it without the CSL (manually configuring registers).

I have not yet been able to see a pin (SCL or SDA) move when I attempt to write to the I2C bus.

In the 5509A the SCL and SDA pins are dedicated so there is no multiplexing or pin setup that I can see. The DSP is not in idle, I have other code running very well.

I have also tried the sample code that installs with the CSL and the App note SPRA785. No luck.

Any ideas?

over 14 years ago

0 Hyun Kim over 14 years ago

TI__Genius 14965 points

Hi,

Have you tried with example code from Spectrum Digital http://c5000.spectrumdigital.com/dsk5509a/?

The tone project is a good example to check I2C controlling AIC32 codec through I2C.

Regards,

Hyun

0 mjones over 14 years ago in reply to Hyun Kim

Intellectual 880 points

Hyun,

Maybe I am missing something. I looked at the tone project and it seems to me that it is using the McBSP for comms.

Mark

0 Hyun Kim over 14 years ago in reply to mjones

TI__Genius 14965 points

Hi,

Can you send me your email address I'll send you a sample code to check I2C?

Regards,

Hyun

0 mjones over 14 years ago in reply to Hyun Kim

Intellectual 880 points

mjones@voltech.com

0 Hyun Kim over 14 years ago in reply to mjones

TI__Genius 14965 points

Your company blocked email the zip file attached. So I attached here. This code is test only.

Regards,

Hyun

i2c_dma_send.zip

0 mjones over 14 years ago in reply to Hyun Kim

Intellectual 880 points

Hyun,

Sorry for the late response.

Thanks for the code. We will probably need to utilize the I2C interface again. We decided to implement the interface over GPIOs so that we could move on with development. We never did get the pins to give any type of activity.

Thanks for your assistance. I appreciate having some code that we can use for the future.

Now I am struggling with Timer0 and properly ticking for external clock inputs below 1MHz. (Posted under "5509A Timer0 as ExtCLK Input Not Counting for Freq below 1MHz")

Thanks

0 mjones over 12 years ago

Intellectual 880 points

Hi Mjones:

I saw you have the problem about I2C.

http://e2e.ti.com/support/dsp/tms320c5000_power-efficient_dsps/f/109/t/91332.aspx

Have you solved the problem? I met the same problem as you. I found SCL and SDA does not change at all when write or read.

Thanks!

Jian

See the other posts in this thread for some sample code using the I2C. We received the sample code after we had already moved along and implemented the I2C interface with GPIO pins. We may go back and do it properly with the peripheral later. If you implement with GPIO pins, you run the risk of interrupts corrupting your I2C communications.

Hope this helps.

Cheers,

Mark

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Pins Won't Woggle Using I2C on 5509A