TMS320F280039C: Possible for ISR to occur between start and address for I2C controller?

Wayne Huang

Dear Champs,

I am asking this for our customer.

The user is migrating codes from one of our competitors onto F280039C and hopes the behavior to be the same as possible.

The user wonders

1) Is it possible to generate an I2C ISR between start and address when F280039C I2C controller is used?

Then, inside this I2C ISR, the user write I2C target address, then it outputs.

So far, from our example, it seems the user has to write I2C target address initially before an I2C ISR and then output S and address+R/W together and then an I2C ISR like TXRDY occurs.

2) Being I2C controller, what are the occurrence timing of ISR for XRDY, ARDY event?

Is it possible to show a timing diagram like the above for the user to understand in more detail?

over 2 years ago

0 Aishwarya Rajesh over 2 years ago

TI__Mastermind 20435 points

Hi Wayne,

ARDY has a higher priority than XRDY, and the timing diagram of XRDY is shown here. I will contact the design experts / try it on my end for confirmation on the interrupt condition as well as the timing of ARDY events. Please give me 3-4 business days to respond back.

Aishwarya

0 Wayne Huang over 2 years ago in reply to Aishwarya Rajesh

TI__Genius 17125 points

Dear Aishwarya,

The image you showed above is for Slave (Target) Transmitter, but this post is for Master (Controller) Transmitter.

Can we still refer to the image above?

0 Aishwarya Rajesh over 2 years ago

TI__Mastermind 20435 points

Hi Wayne,

I've reached out to design for confirmation on this matter. Thank you for your patience.

Aishwarya

0 Wayne Huang over 2 years ago in reply to Aishwarya Rajesh

TI__Genius 17125 points

Dear Aishwarya,

Any update?

0 Aishwarya Rajesh over 2 years ago

TI__Mastermind 20435 points

Hi Wayne,

I've followed up with the design team again, thank you for your patience.

Aishwarya

0 Aishwarya Rajesh over 2 years ago

TI__Mastermind 20435 points

Hi Wayne,

Hoping to get you an update by end of this week / early next week once I receive the waveforms for controller event timings. Thank you for the suggestion of timing diagrams, I'll work on getting that incorporated into the TRM.

Best Regards,

Aishwarya

0 Wayne Huang over 2 years ago in reply to Aishwarya Rajesh

TI__Genius 17125 points

Dear Aishwarya,

I see.

Look forward to it.

0 Aishwarya Rajesh over 2 years ago in reply to Wayne Huang

TI__Mastermind 20435 points

Hi Wayne,

Thank you for your patience. Will keep you posted.

Aishwarya

0 Aishwarya Rajesh over 2 years ago

TI__Mastermind 20435 points

Hi Wayne,

I've received timing diagrams for controller TX/RX events. I've currently shared this with you via email and will update this in the TRM after as well.

Best Regards,

Aishwarya

+1 Aishwarya Rajesh over 2 years ago

TI__Mastermind 20435 points

Wayne,

As we are discussing this offline, I will go ahead and close this thread.
For anyone reading this post and interested in timing diagrams, I am working with design experts to get this included in collateral.
Best Regards,

Aishwarya

0 Wayne Huang over 2 years ago in reply to Aishwarya Rajesh

TI__Genius 17125 points

Dear Aishwarya,

OK, let's close this post and discuss this offline.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280039C: Possible for ISR to occur between start and address for I2C controller?