CCS/TMS320F28335: How to understand logic flow chart?

Joon Woo Lee

Intellectual 255 points

Part Number: TMS320F28335

Tool/software: Code Composer Studio

Hi. I'm using TMS320F28335.

Whenever I wonder how to use TMS320F28335, I read datasheet.

Every time I meet this logic flow chart.

How do I understand it step by step?

Thank you.

over 4 years ago

0 Siddharth Deshpande over 4 years ago

TI__Mastermind 34665 points

Hi ,

Looks like the images are not uploaded to the post. Request you to attach the images again.

Best Regards

Siddharth

0 Joon Woo Lee over 4 years ago in reply to Siddharth Deshpande

Intellectual 255 points

I fixed it.

Best Regards

Joon Woo Lee

0 MatthewPate over 4 years ago in reply to Joon Woo Lee

TI__Guru* 77460 points

Joon,

Thanks for reaching out to the E2E forum. The large "8" arrows you've highlighted are meant to convey that there exists a databus between these pieces of logic and it is 8 bits wide. The thin/solid arrows are just Boolean control signals that run to/from the registers and other control signals.

Let me know if you are running into a specific issue with the SCI you are trying to debug with the logical diagram and I can narrow down my comments accordingly.

Best,

Matthew

0 Joon Woo Lee over 4 years ago in reply to MatthewPate

Intellectual 255 points

Thank you matthew.

FIFO has 16bits buffer, you know, when the fifo is full, does it send 8 bits each?

Can I regulate the size?

For example, 8bits to 16bits.

Thank you a lot.

0 MatthewPate over 4 years ago in reply to Joon Woo Lee

TI__Guru* 77460 points

Joon,

I believe the transmit size is fixed to 8-bit wide data each time. As soon as the FIFO gets one word(if the SCITX is enabled) it will transmit that word. You can keep writing to the Tx register to load more words to the FIFO. The FIFO will get loaded up to 16 8-bit words as it waits for the current transfer to complete, then it will take the next FIFO word, and so on. You can use the FIFO State to determine how many words are left to transmit/how much room is open for new words to be written.

Best,

Matthew

0 Joon Woo Lee over 4 years ago in reply to MatthewPate

Intellectual 255 points

Thank you for your answer.

Could you answer this question

CCS/TMS320F28335: SCI FIFO to PC communication issue. - C2000 microcontrollers forum - C2000™︎ microcontrollers...

e2e.ti.com

Part Number: TMS320F28335 Other Parts Discussed in Thread: MAX3232 , C2000WARE Tool/software: Code Composer Studio Hi. I'm operating TMS320F28335. Now I try

0 MatthewPate over 4 years ago in reply to Joon Woo Lee

TI__Guru* 77460 points

Joon,

There is another C2000 engineer who has been assigned. I believe she has replied to your other question.

Best,

Matthew