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ULX3S / ECP5

ULX3S / ECP5 starter page with verified-source-first notes and simulation path before hardware.

Toolchain and notes

Open-source simulationRadiona local tool notes

Pin and IO facts must come from board documentation; generated pinout is not accepted.

Wrong top-level port names in constraints.Assuming board voltage without checking documentation.

ULX3S / ECP5 LED/blinky starter

D4verilog-counter-enableconstraints-create-primary-clock

Prepare a safe first board lab with simulation first.

  1. Run the counter/PWM simulation task.
  2. Read board clock/reset notes and verified constraints source.
  3. Use local vendor/open-source toolchain only outside edu.fpga.camp cloud.