4 LIB_DIR
=/usr
/local
/diamond
/3.11_x64
/ispfpga
/verilog
/data
/ecp5u
6 python simcrg.py generate simcrg.v
7 iverilog
-o simcrg simcrgtb.v simcrg.v
${LIB_DIR}/ECLKSYNCB.v ${LIB_DIR}/CLKDIVF.v ${LIB_DIR}/EHXPLLL.v ${LIB_DIR}/PUR.v ${LIB_DIR}/GSR.v