1.Read the design data
set search_path
set link_path
read_verilog {adder.v full_adder.v half_adder.v}
link_design full_adder //important
read_vcd -stript_path top/adder/adder_bit1 ../sim/adder.vcd
// link_design full_adder , the full_adder is a full adder module
// read_vcd , the adder_bit1 is a instance of full_adder
//so when u want to anaylse a part of design, u must link_design use the module name and read_vcd use the instance name
read_db
2.Read parasitics
read_parasitics //important
3.Read in the activity file
read_vcd //important
4.Calculate power
set_operating_conditions
set_waveform_options
calculate_power
###########################
i dont know why the command read_saif and vcd2saif cant not execute in pp_shell but the document have 2 commands manu.
now i know that the above 2 commands r cshell command,not be executed in pp.