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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

and another uart problem.

hello guys, i'm having a problem with my FIFOED UART, The only thing im trying to do i send a big file over the uart and show on the Nios 2 Console that the data actually is being received...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

after a long day of trying and trying and trying.. it still doesn't work.

i tried to implement a while loop based on the extra registers created by the FIFOED UART: FIFOED_AVALON_UART_RX_FIFO_USED also tried to use the RRDY bit. But I am not entirely sure which flags to use.

in its current state( most working code the one posted here ) i get strange behaviour. I made an spreadsheet where the number of bytes is layed out against the fifo index.

http://img88.imageshack.us/img88/3426/strangebehaviourbc7.th.png (http://img88.imageshack.us/my.php?image=strangebehaviourbc7.png)

As you can see there isn't any logic to be seen in the results

@ cfavreau: I've written in another topic that you were able to get 2mb/s with this uart. Maybe you can give a piece of your code? maybe the piece with the while loop in it?

Also I am trying to use the signaltap to figure some things out. But again I am not quite sure which signals to use. maybe someone can point them out?

thanks for all the efforts of you guys.

as a student i really appreciate it