No current limiting resistors for the three LEDS?

[zapta]

The three LEDs don't have current limiting resistors. When a LED is on, do the FPGA outputs that drive them operate within spec?

[vr2045]

The current source is inside the FPGA and can be adjusted and is capable of driving the LED's directly. Please see the RTL blinky to see how you can do this.

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[zapta]

Thanks. Found it. I guess I can abstract it as a module with three binary inputs to turn the leds on/off. Will look into it.

I suggest to mention this special led requirement in the PCF file and in the schematic since it's not obvious.