Programmable Devices
CPLDs, FPGAs, SoC FPGAs, Configuration, and Transceivers
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program with 8 LEDs

Altera_Forum
Honored Contributor II
‎05-19-2010 02:51 PM
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hi,:) 

 

i have a problem, i want to create a program which turn on 8 LEDs on a cyclone III. I want to write on the I/O FPGA port directly. In fact, i have a problem with my clock; i got this warning:"Warning: The following clock transfers have no clock uncertainty assignment 

Warning: From ext_clk (Rise) to ext_clk (Rise) (setup and hold)". Idon't want to create a sopc builder, i just want to do a simple program and realise following LED.(Chenillard) 

 

thanks
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Altera_Forum
Honored Contributor II
‎05-19-2010 03:56 PM
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That warning has nothing to do with the SOPC. 

 

Simply, the static timming analysis tool (TimeQuest?) is warning you have not assigned any uncertantiy to the ext_clk and, thus, analysis will assume a "perfect" clock, without jitter, skew, etc.
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