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Altera_Forum's avatar
Altera_Forum
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13 years ago

UART on DE2

Hi, I'm using DE2 (old kit) and my application has a UART to exchange data with PC. I'm using the kit's RS232 connection (not the JTAG). I created the system (including the UART at 9600bps) in Qsys a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

It is quite simple to use interrupts : look at Nios II examples. You just need few functions like 


// Read status and compare to RRDY_MSK
if (IORD_ALTERA_AVALON_UART_STATUS(UART1_BASE) & ALTERA_AVALON_UART_STATUS_RRDY_MSK)
    {
      donnee = IORD_ALTERA_AVALON_UART_RXDATA(UART1_BASE);
}
//...

By doing this way, your main program will be interrupted at every character received (of course).

Be careful about blocking situations.

Good Luck