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5,050 Views
Registered: ‎04-10-2012

Trouble in picoBlaze .ucf

Hi

 

I am in trouble

 

I am trying to instal a picoBlaze - following the instructions of :

 

"  The spartan 3E tutorial 2 Introduction to using the

picoBlaze Microcontroler   "

 

Jasmine Banks

 

[PDF]

 

I can not make my Plan Ahead screen like Jasmine did.

Her screen have not the data in the yellow circle like mine

( see attachements )

 

As I can not erase those data, I ask you : may I go to the

C : User /Xilinx --

Plan Ahead File and edit the generated . ucf file?

deleting those    " drive strength " unnecessary    data ?

 

TKU

 

Benedito

 

 

 

 

 

Capture 2.JPG

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4 Replies
eilert
Teacher
Teacher
5,026 Views
Registered: ‎08-14-2007

Hi Benedito,

actually a drive strength and slew rate setting for inputs makes no sense.

It might be some flaw in the GUI.

 

Have you checked the resulting UCF file in a text editor?

If the unnecessary entrys appear there too you can easily eliminate them manually.

 

Have a nice synthesis

  Eilert

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5,004 Views
Registered: ‎04-10-2012

Hi

 

I edited the .ucf   but when I  run  sinthesize, i got those

warnings  I copied below.

 

Are those warning important ?

 

May I disrespec and go ahead ?

 

I need help- Benedito

warning 1.JPG

warning 2.JPG

 

 

full window.JPG

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chapman
Xilinx Employee
Xilinx Employee
4,893 Views
Registered: ‎09-05-2007

These warning messages indicate to me that the ‘read_strobe’ and ‘write_strobe’ outputs of the KCPSM3 macro are not connected to anything in your design.

 

I would expect ‘write_strobe’ to be used in every design so please check how you have defined output ports in your design.

 

It is quite common for the ‘read_strobe’ to not be required and therefore left unconnected. So a warning related to ‘read_strobe’ would often be acceptable.

 

Ken Chapman
Principal Engineer, Xilinx UK
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4,847 Views
Registered: ‎04-10-2012

Hi Ken

 

This program is a very simple one, and gave the

the results we wanted.

 

Thanks your information about read_strobe.

 

I am learning and enjoying  picoBlaze very much.

 

Benedito

 

 

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