Beginner Question

[TommyT]

I just got a PapilioPro with LogicStartMega Wing (ISE WebPack 14.7 and Papilio Loader 2.6 used).

 

My first Bit-File ( first example from 'IntroToSpartanFPGABook') was correctly generated by ISE.

Options:  Family:Spartan 6; Device:XC6SLX9 Package:TQG144; Speed -3

 

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity switches_LEDs is
    Port ( switch_0 : in  STD_LOGIC;
           switch_1 : in  STD_LOGIC;
           LED_0 : out  STD_LOGIC;
           LED_1 : out  STD_LOGIC);
end switches_LEDs;

architecture Behavioral of switches_LEDs is

begin
 LED_0 <= switch_0;
 LED_1 <= switch_1;
end Behavioral;

 

constraints (copied from the above book)

# Constraints for Papilio One
NET switch_1 LOC = "P3" | IOSTANDARD=LVTTL;
NET switch_0 LOC = "P4" | IOSTANDARD=LVTTL;
NET LED_1 LOC = "P16" | IOSTANDARD=LVTTL;
NET LED_0 LOC = "P17" | IOSTANDARD=LVTTL;

 

 

When connecting the Board with Wing to my PC, LEDs 0,2,4 and 6 are flashing.

Transferring the Bit-File with Papilio Loader:

JTAG chainpos: 0 Device IDCODE = 0x24001093    Desc: XC6SLX9
Using devlist.txt
Created from NCD file: switches_LEDs.ncd;UserID=0xFFFFFFFF
Target device: 6slx9tqg144
Created: 2015/02/08 16:15:19
Bitstream length: 2724832 bits

Uploading "C:\Users\Tomuser\Documents\FPGA\switches_LEDs\switches_leds.bit". DNA is 0xb901440d5afe48fe
Done.
Programming time 735.0 ms
USB transactions: Write 175 read 7 retries 0

 

Blinking after uploading stops, but no effect on using any of the switches. 3 of the four digits show '8'.

 

Can you give me a hint how to go further?

(Are the constraints, which were planned for Papilio One) correct ?

 

Thanks!
 

[Jack Gassett]

Hello TommyT,

 

It looks like your constraints are not in the correct pin locations. Please take a look at this chart in the Hardware Guide to see the correct pins for the Papilio Pro:

http://www.papilio.cc/index.php?n=Papilio.LogicStartMegaWing#led

 

switch_0 should be "P114" for the Papilio Pro and so forth.

 

Jack.

[james1095]

I like to start with the generic constraints file, you just change the net names on the pins you want to use, then delete or comment out all the other lines. Constraints files for the Papilio One and Pro are here:

 

http://forum.gadgetfactory.net/index.php?/files/file/27-logicstart-megawing-papilio-propapilio-one/