Sign in

username:

password:



Not a member?

Search fpga-cpu



Search tips

Subscribe to fpga-cpu



fpga-cpu by Keywords

Altera | CISCifying | IDE | ISA | Java | JHDL | JTAG | LBU | MicroBlaze | PAR | PCI | RISC | SoC | Spartan | Transputers | Verilog | VHDL | Virtex | VLIW | WebPack | Xilinx | Xsoc | YARD-1A

Ads

Discussion Groups

Discussion Groups | FPGA-CPU | Xilinx Multimedia Board pushbutton problems

This list is for discussion of the design and implementation of field-programmable gate array based processors and integrated systems. It is also for discussion and community support of the XSOC Project (see http://www.fpgacpu.org/xsoc).

Xilinx Multimedia Board pushbutton problems - Nat Chan - Feb 27 14:39:00 2004

Hi,

I'm in a course where we are using the Xilinx Multimedia board for a
project with EDK 6.1.

I am trying to use the pushbuttons on the board for user input, but
the data does not seem to get recorded.

According to the user's guide:

"Any change in the push buttons starts the Enter LED flashing until
the new data is transmitted in response to a closure of the Enter push
button. Status of push buttons (shown in Figure 1-15) is indicated by
associated LEDs. A closed push button is indicated by an illuminated
LED and has a logic High transmitted to the FPGA during data
transmission."

But, the pushbutton LEDs flash constantly, even that of ENTER. The
ENTER button appears to work & it clocks something, but no data
appears to be coming in.

Any advice on getting the pushbuttons to recognize input would be
appreciated.

Thanks in advance,
Nathalie






(You need to be a member of fpga-cpu -- send a blank email to fpga-cpu-subscribe@yahoogroups.com )


Re: Xilinx Multimedia Board pushbutton problems - Nat Chan - Aug 25 23:45:00 2004

Since someone has asked me for how it worked in the end, I will post
that here:

There is a signal "Startup" that needs to be driven in order for
the
pushbuttons to work.

Here is the line to add to the UCF file.

Net startup LOC=AK5;

-Nathalie --- In , "Nat Chan" <tinkerbunk@h...> wrote:
> Hi,
>
> I'm in a course where we are using the Xilinx Multimedia board for
a
> project with EDK 6.1.
>
> I am trying to use the pushbuttons on the board for user input, but
> the data does not seem to get recorded.
>
> According to the user's guide:
>
> "Any change in the push buttons starts the Enter LED flashing until
> the new data is transmitted in response to a closure of the Enter
push
> button. Status of push buttons (shown in Figure 1-15) is indicated
by
> associated LEDs. A closed push button is indicated by an
illuminated
> LED and has a logic High transmitted to the FPGA during data
> transmission."
>
> But, the pushbutton LEDs flash constantly, even that of ENTER. The
> ENTER button appears to work & it clocks something, but no data
> appears to be coming in.
>
> Any advice on getting the pushbuttons to recognize input would be
> appreciated.
>
> Thanks in advance,
> Nathalie



(You need to be a member of fpga-cpu -- send a blank email to fpga-cpu-subscribe@yahoogroups.com )