Forum Discussion

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

UART Interrupt Mode

I'm trying to use a Nios II system to send and receive messages over RS232 UART. My applications requires a non-blocking read operation, so I am trying to configure the UART to work in interrupt mode...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I have the same issue. Im surprised no one has answered your post.

Reading the documentation the UART driver should operate in interrupt mode so long as small driver is disabled in BSP. Using open,read write and ioctl should then control UART functions and automatically be handled by circular buffers in the background (default size ALT_AVALON_UART_BUF_LEN), but in my case it seems it is still in polling mode and wont respond to interrupts. I am now writing my own driver because of this issue.