UART with FIFO Buffer - Page 2

Altera_Forum · ‎10-24-2005

Need to use UART with FIFO Buffer in SOPC Builder Nios II System:

1> The UART RS232 available in SOPC are without FIFO is it possible to add FIFO by modifying the same UART core

2> If not is there any other SOPC ready UART_FIFO core available as free IP

3> If not is it possible to get estimate of

- LE utilization without Modem Control logic

- Is it necessary to write device driver for the same

- Apprx how much design time it will take to

design HDL UART, device driver for a single person?

Please advice asap. running short of time.

Thanks in Advance

Altera_Forum · ‎02-02-2007

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/dry.gif what's wronged in this C file?

I'm using FIFOed_avalon_uart Opencore

I can't transmit throught RS232 with this code using instruction

fifoed_avalon_uart_write(fp,byte/*Tx Pointer*/,25344);

(UART's light is always swithced off)

FILE* fp;

fp = fopen ("/dev/fifoed_avalon_uart_0", "w+"); // Read && Write

int ret;

if (fp!=NULL)

{

printf("\nOpen file");

ret = fflush(fp);

if(ret==0)

printf("\nFlushed file");

else

printf("\nNot flushed file");

//Polling

int j=0,k=0,z=0,controllo;

k=((ctrl/4)*(multi));

z=((ctrl/4)*(multi+1))-1;

for(j=k ;j<z; j++)

//fprintf(fp,"%x",byte[j]);

check=fifoed_avalon_uart_write(fp,byte/*Puntatore dati da Tx*/,25344);

but it seems i can transmit using (UART's light is switched on during TX)

fprintf(fp,"%x",byte[j]);

...anyway, the received bytes don't seems the ones transmitted....What's up?

Thanks http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif

Altera_Forum · ‎04-29-2011

Hi,

does this IP still exist ? where can i find it ?

thanks.

Altera_Forum · ‎04-29-2011

If you need an UART with buffers, you can try YANU Uart from opencores. Its interface is compliant to Altera Avalon Interfaces and, as I remember, is supported in U-Boot (if you need a bootloader, too).

Altera_Forum · ‎04-29-2011

thanks ! I was searching the altera one for the sopc compatibility but yanu ip seems to have the same purpose. I will try it as soon as possible.

Altera_Forum · ‎05-04-2011

I use this IP instead :

http://www.alterawiki.com/wiki/fifoed_avalon_uart

it is based on altera_avalon_uart and is sopc ready. very fast to implement !!

Altera_Forum · ‎02-18-2014

Hi

I'm having issues with the fifoed avalon uart; I think it is a software issue but I am not sure.

I previously posted here

http://www.alteraforum.com/forum/sho...721#post181721

thanks.

Altera_Forum · ‎02-20-2014

Hey fates would you mind explaining how you got it to work?

I'm not having much luck with my own attempts.