How do I achieve 1 byte only communication on FIFOed Avalon Uart?

[EMelo]

Hello,

I am trying to use the latest version of this FIFOed Avalon Uart component:

https://forums.intel.com/s/createarticlepage?language=en_US&articleid=a3g0P0000005RTHQA2&artTopicId=0TO0P000000MWKBWA4&action=view

to setup an UART slave device on my Cyclone V. Everything seems working great when I receive more than 3 bytes but I found weird behaviors when the communication is about one or two bytes. Here the NIOS interrupt service routine triggers as soon as the byte is received but if I check the valued stored in the RX FIFO I always find "0x0000" (always zero). 

Any idea?

In attach the IP settings.

[Ahmed_H_Intel1]

Hi,

The next link shows a very useful examples for FIFOed AVALON UART

https://fpgacloud.intel.com/devstore/?search=FIFOed%20Avalon%20Uart

Regards,

[Ahmed_H_Intel1]

Hi,

Please let me know if you need more support.

Regards,