TMS320F28069: I2C

Najeeb Uddin

Part Number: TMS320F28069

I want to use I2C on pins, other then the dedicated pins. Is it possible to short two GPIO pins in the software or the only way is to implement I2C protocol in software ?

P.S. I don't want to short the pins externally.

over 5 years ago

0 Kevin Allen18 over 5 years ago

TI__Mastermind 45606 points

Hi Najeeb,

The I2C module is brought out to the pins GPIO28/29 and GPIO32/33. You're saying you don't have access to an SDA / SCL pair between these GPIO options?

There's no way to short the pins through software. I don't believe shorting the pins externally would even work for this purpose, since the I2C module pins are uniquely open-drain and bi-directional.

Best,

Kevin

0 Najeeb Uddin over 5 years ago in reply to Kevin Allen18

Intellectual 350 points

Hi Kevin,

Thanks for the response, So the only way is to implement i2c protocol in software if I want to use pins other then the dedicated ones, right ?

0 Kevin Allen18 over 5 years ago in reply to Najeeb Uddin

TI__Mastermind 45606 points

Hi Najeeb,

Yes, that's correct. I've heard of this being done on IOs before, but I don't have a SW example to direct you to unfortunately.

Best,

Kevin

0 Najeeb Uddin over 5 years ago in reply to Kevin Allen18

Intellectual 350 points

Hi Kevin,

Thanks for your response, I got my answer.

I know this is not the place to ask this question but I have no place else to go, I am having problem posting new question from yesterday. I am getting the following error:

I changed my email id to company email id but I am still getting this error. Please let me know how I can fix this ?

Thanks

Najeeb

0 Kevin Allen18 over 5 years ago in reply to Najeeb Uddin

TI__Mastermind 45606 points

Hi Najeeb,

New requirements for posting on the E2E forum have been added recently as you've found, more details provided below:

https://e2e.ti.com/support/site-support/f/1024/t/944492

Najeeb Uddin said:
I changed my email id to company email id but I am still getting this error. Please let me know how I can fix this ?

If you already updated your email it seems like the error may be a bug. Sorry I'm not sure how to fix it, but you can search on the E2E site support forum below for an answer to fix it or post there yourself if you don't find an answer.

https://e2e.ti.com/support/site-support/f/1024

Best,

Kevin

0 Najeeb Uddin over 5 years ago in reply to Kevin Allen18

Intellectual 350 points

Hi kevin,

Thanks it worked, I had to save "e2e community preferences". It wasn't mentioned in the instructions but they added it now and now I can post new thread. Thanks for the response, appreciated.

Najeeb

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TMS320F28069: I2C