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Altera_Forum
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20 years ago

UART with FIFO Buffer

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

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/dry.gif what&#39;s wronged in this C file?

I&#39;m using FIFOed_avalon_uart Opencore

I can&#39;t transmit throught RS232 with this code using instruction

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

(UART&#39;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&#39;s light is switched on during TX)

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

...anyway, the received bytes don&#39;t seems the ones transmitted....What&#39;s up?

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