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Altera_Forum's avatar
Altera_Forum
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18 years ago

RS232 DE2 board

Hi all, I'm working on a summer project and am trying to use the RS232 connection to connect the DE2 altera board to a hyperterminal on the computer to allow display information from the board....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hi Paul,

what kind of project do you have? HDL-code only or SOPC Builder project maybe with Nios processor?

If you have a nios processor system, you could search the Nios Forum (General Discussion and General Software Forum) for "uart" and "rs232", because there are plenty of posts according to this topic with good hints.

A simple C-function to send characters is this one:

void UART1_T(unsigned char ch)

{

while((IORD_ALTERA_AVALON_UART_STATUS(UART_BASE) & 0x040) != 0x040)

{ ;}

IOWR_ALTERA_AVALON_UART_TXDATA(UART_BASE,ch);

}

You can find it in the thread "Need help for my RS232 in NIOS II" in the "General Software Forum" of the Nios Forum.

And did you check check the Volume V, section II "Communication Peripherals", chapter 6 "UART Core with Avalon Interface" of the Quartus II Handbook (http://www.altera.com/literature/quartus2/lit-qts-peripherals.jsp) already?

Hope that helps :)