TMS320F28069: I2C Driver Robustness question - any concerns clearing FIFO buffer?

_Lina

Part Number: TMS320F28069

Hi Team,

Had a question come up recently regarding clearing the FIFO. Are there any special circumstances to consider when clearing the FIFO buffer? The logic is as follows:

C2000 is slave i2c device. When master sends read command, C2000 checks FIFO buffer and if not zero, clears it. This is to prevent any leftover information from being transmitted accidentally.

I didn't see much in the TRM regarding details on the FIFO buffer and also didn't find anything in the errata, but just wanted to be sure.

Thanks,

over 8 years ago

0 Adam Haun over 8 years ago

TI__Expert 8950 points

Lina,

I'm not totally sure what you're asking, but there shouldn't be any issues with clearing the FIFO using the TXFFRST or RXFFRST bits.

0 _Lina over 8 years ago in reply to Adam Haun

TI__Expert 3305 points

Hi Adam,

Thanks for your help. I'm asking if there is any flaw in the logic above, if there is any alternative/better way, and if there are any special considerations when resetting the FIFO.

Best,

0 Adam Haun over 8 years ago in reply to _Lina

TI__Expert 8950 points

I don't think there's anything wrong with your idea. There are no special considerations when clearing the FIFO.

The only alternative I can think of would be to reset the FIFO at the end of the read by triggering an interrupt on the stop condition, but I don't think that really gains you anything.

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TMS320F28069: I2C Driver Robustness question - any concerns clearing FIFO buffer?