Forum Discussion

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

UART polling

Hello to everybody, I'm developing an application made by several task. I'd like to receive data from uart in asynchronous way. So I has a main loop that continuously execute some task and...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

--- Quote Start ---

originally posted by jaris@Mar 24 2006, 04:33 AM

so i changed the end of alt_avalon_uart_read function (irq-version) to the following: 

  if (!block && count == 0 )
    return -ewouldblock;
  else
    return count;

(the "fast" version of the function should just return -ewouldblock instead of zero)

--- Quote End ---

Thanks for posting this. This was extremely helpful, you saved me hours of frustration.

Excellent workaround.

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