TMS320F280039C-Q1: UART RXFIFO: UART Received is more than RXFIFO size.

Rahul Jathar

Prodigy 150 points

Part Number: TMS320F280039C-Q1

Hello All,

I am using UART RXFIFO interrupt to receive data from ASIC board.

ASIC is sending consecutive 20 bytes at a time to C2000 ware controller, but controller UART RXFIFO has only 16 RXFIFO.

Could you please guide me how to receive all data using UART RXFIFO interrupt.

over 1 year ago

0 Vince over 1 year ago

TI__Mastermind 19795 points

Hi Rahul,

Thanks for your question. Two options:

1. Change the RX FIFO trigger depth to 4 bytes instead of 16. That way, it will interrupt every 4 bytes and you can move those 4 bytes to memory.

2. Keep the RX FIFO at trigger depth 16, and then just wait till another full 16 bytes arrives.

The first option is probably simpler for your case.

Regards,

Vince

0 Rahul Jathar over 1 year ago in reply to Vince

Prodigy 150 points

Hello Vince,

Thank you for immediate response.

Data reception length varies between 2 to 53 bytes.

How to manage this different reception length using RXFIFO (trigger depth)?

+1 Vince over 1 year ago in reply to Rahul Jathar

TI__Mastermind 19795 points

Hi Rahul,

My recommendation is to target the minimum data length (2 bytes or maybe even 1 byte) and use that as the trigger depth. That way, no matter how small the packet is, you will always get an interrupt.

Regards,

Vince

0 Rahul Jathar over 1 year ago in reply to Vince

Prodigy 150 points

Hello Vince,

Thank you for suggestion.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280039C-Q1: UART RXFIFO: UART Received is more than RXFIFO size.