pub fn emit_ulx3s_coproc_lpf() -> String
Emit the ULX3S (LFE5U-85F caBGA381) board constraints: 25 MHz clock (G2), reset = FIRE1 (R1), UART TX → FTDI RXD (L4), 8 LEDs. Sites from the board’s ulx3s_v20.lpf.
ulx3s_v20.lpf