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ymiler's avatar
ymiler
Icon for Contributor rankContributor
3 years ago

ECO issue

Hi, I try to change the LUT output value by the command " modify_lutmask " The TCL file includes the content : modify_lutmask -to eco_sig_1_cZ~0 -mask 0x1 But I get errors when I begin the pe...
Nurina's avatar
Nurina
Icon for Regular Contributor rankRegular Contributor
3 years ago

Hi Yishay,


When you modify the LUT Mask, Quartus will modify the LUT Equation to fit the LUT Mask. So when you change the mask to F3 & F2 = 0, Quartus requires to have the f logic in the F3 & F2 LUT Equation. That's why you receive an error regarding DATAF port.


Whereas when F3 & F3 = F you get no errors because Quartus doesn't depend on the f logic for this LUT Mask.


Regards,

Nurina


ymiler's avatar
ymiler
Icon for Contributor rankContributor
3 years ago

Hi Nurina

I dont uderstand , what is the probelm to define the masks to F3 & F2 = 0 ? why does it cause to error regarding DATAF port ?

why its regarding to DATAF ? why I have spesific problem with DATAF ? why not with DATAB as well ? or all other ports ?

Yishay