UCF to XDC

[PoojaN]

I had a written a code for one of my boards a few years back using ISE. Now I want to transfer it to Vivado.

I had used the following line in the UCF file before,\

NET "INPUT_1" LOC = "P6" | IOSTANDARD = LVCMOS33 | SCHMITT_TRIGGER ;

I changed it to xdc in the following way,

set_property -dict {PACKAGE_PIN U11 IOSTANDARD LVCMOS33} [get_ports {INPUT_1}], but I don't understand where can I enter the SCHMITT_TRIGGER IOSTANDARD?

Can anyone help me with this?

[PoojaN]

I just got an answer for this question.

 

"There are no Schmitt trigger inputs in 7-series FPGAs."

@jpeyronThank You for the quick help!!

[jpeyron]

Hi @PoojaN

On page 107 of the Vivado Design Suite Properties Reference Guide it shows the SCHMITT_TRIGGER property.

It looks like it would be used like

 set_property SCHMITT_TRIGGER  TRUE [get_ports {JA[0]}]

best regards,

Jon

[PoojaN]

Yes I tried that, but gives me the following error

[Netlist 29-69] Cannot set property ' set_property SCHMITT_TRIGGER  TRUE [get_ports {JA[0]}]', because the property does not exist for objects of type 'port'. ["C:/Projects/raccer_board_1/raccer_board_1.srcs/constrs_1/new/raccer.xdc":11].

I also tried changing the names and trying out all possible permutations and combinations to not get an error.

[jpeyron]

Hi @PoojaN,

Using your initial xdc example i believe it should look like this:

set_property -dict {PACKAGE_PIN U11 IOSTANDARD LVCMOS33} [get_ports {INPUT_1}]

set_property SCHMITT_TRIGGER  TRUE [get_ports {INPUT_1}]

best regards,

Jon

[PoojaN]

1 hour ago, jpeyron said:

set_property SCHMITT_TRIGGER  TRUE [get_ports {INPUT_1}]

I got the following error when I used this command in the XDC

[Netlist 29-69] Cannot set property 'SCHMITT_TRIGGER', because the property does not exist for objects of type 'port'. ["C:/Projects/raccer_board_1/raccer_board_1.srcs/constrs_1/new/raccer.xdc":11].

 

 

[jpeyron]

Hi @PoojaN,

Thank you for letting us know the the Schmitt_trigger property doesn't work with the 7-series FPGA's

best regards,

Jon