URGENT HELP re: toggle switches on DE2

[Altera_Forum]

Hey folks, 

 We are working with DE2 board and are having problems with toggle switches. In our program, we used IORD_ALTERA_AVALON_... to read the input from the switch and whether it is up or down (ie 1 or 0), we are always reading 1. Not sure what the problem is. Would appreciate any positive information ASAP.   Thanks.

[Altera_Forum]

I've created a design with the following components: 

Nios II/s Onchip memory  - 32 KB PIO 0 - 18 output only - Base address 8800 - Connected to the Red LEDs PIO 1 - 18 input only - Base address 8810 - Connected to the Switches  Ran the following code which continuously reads the switches and writes their values to the LEDs: #include <io.h> void main(void) {    int sw_data;    while (1)    {        sw_data = IORD_32DIRECT(0x8810, 0);        IOWR_32DIRECT(0x8800, 0, sw_data);    }    return; }  Seems to work.  A Common Pitfall: - Not assigning pins to signals in the assignment editor.   Good luck, Blair

[Altera_Forum]

--- Quote Start ---  originally posted by theguru@Mar 20 2007, 02:49 PM i&#39;ve created a design with the following components: nios ii/s onchip memory  - 32 kb pio 0 - 18 output only - base address 8800 - connected to the red leds pio 1 - 18 input only - base address 8810 - connected to the switches  ran the following code which continuously reads the switches and writes their values to the leds: #include <io.h> void main(void) {    int sw_data;    while (1)    {        sw_data = iord_32direct(0x8810, 0);        iowr_32direct(0x8800, 0, sw_data);    }    return; }  seems to work.  a common pitfall: - not assigning pins to signals in the assignment editor.   good luck, blair <div align='right'><{post_snapback}> (index.php?act=findpost&pid=22367)</div>  --- Quote End ---     Thansk Blair. Will test that out and see what happens...