Xilinx Boards and Kits

[sudheera95]

Hi... i have interfacing problem with spartan 3e FPGA.

My project actually deals with finding  distance from mobile robot to the obstacle. for obstacle detection i have an ultrasonic ranging module. The output of this module is a pulse whose width is proportional to distance.This has to be interfaced to FPGA for  distance estimation through a logic level translator (to reduce the voltage level). We have developed this pulse width to distance conversion program in verilog. Only problem is i dont know to which pin of spartan 3e FPGA starter kit board the output of this ranging module should be given to display the distance...please do help mee....

Already some of your experts advised me to use any of the  available FPGA pin, assuming the pin has the correct IOSTANDARD, or to use any of the PMOD connectors on the Starter kit board to connect to the FPGA. but please be specificwhich pin out of total available pins or please specify its UCF location for  spartan 3e FPGA starter kit board.

please help mee......

[sudheera95]

Hi... i have interfacing problem with spartan 3e FPGA.

My project actually deals with finding  distance from mobile robot to the obstacle. for obstacle detection i have an ultrasonic ranging module. The output of this module is a pulse whose width is proportional to distance.This has to be interfaced to FPGA for  distance estimation through a logic level translator (to reduce the voltage level). We have developed this pulse width to distance conversion program in verilog. Only problem is i dont know to which pin of spartan 3e FPGA starter kit board the output of this ranging module should be given to display the distance...please do help mee....

Already some of your experts advised me to use any of the  available FPGA pin, assuming the pin has the correct IOSTANDARD, or to use any of the PMOD connectors on the Starter kit board to connect to the FPGA. but please be specificwhich pin out of total available pins or please specify its UCF location for  spartan 3e FPGA starter kit board.

please help mee......

[sudheera95]

my question is by using 6 pin pmod connector  how can we connect  this output which is a single wire . please doo respond meee

[gszakacs]

1)  In the User Guide pages 123-124, the 6-pin headers are described.

2) Choose one of the 12 signals named FX2_IOx, for example FX2_IO1.

3) Find the header pin number for that signal in the schematics (sheet 1).  For example, FX2_IO1 is pin 1 of J1.

4) Make sure that your .ucf file has a LOC constraint for FX2_IO1 (it should be pin B4 according to the User Guide).

5) Make sure that your project uses input port FX2_IO1 to receive the signal.

-- Gabor

[austin]

and,

Make sure you have a common ground.  One wire is not an interface, but two wires (signal and ground) are.

[eteam00 · Accepted solution]

Don't forget the 9V to 3.3V (or lower) level translator.

-- Bob Elkind

[sudheera95]

hii...thank you one and all for your patience reply and my problem got solved.

[sudheera95]

As a said earlier we have developed pulse width to distance converter (PWDC) in verilog..i'm attaching the details of PWDC. I HAVE PROBLEM WITH PIN ASSIGNMENT...PLEASE FIND THE ATTACHMENT AND RESPOND ME AS EARLY AS POSSIBLE....

[eteam00]

See:  care and feeding of the onboard 2-line character LCDs  link#1  link#2

-- Bob Elkind