siliconsmart教程

嘀嗒嘀

网络上教程不多，搜索的多是一两个人的教程，各个网站互相拷贝，在摸索学习过程中，记录下基本的使用教程。

准备基本资料
1). spice网表，或者gds和pex提取文件
2). sample lib文件，可以是任何其他现有的lib库。如果lib不包含你需要的cell，可以按照已有的格式添加cell，只写pin的信息，保证import的时候能够对应。
3). 对应的工艺model文件，通常用hspce的model，也可以用finesim，或者spectre。
网表提取
通常需要对很多个cell批量操作，下面说明批量生成网表的过程。
首先需要准备好celllist, 简单用ls和echo等命令生成即可。
然后编写calibre的rule脚本。
header.conf：

1. foreach i (`cat Cell.list`)
   
2. echo $i
   
3. #print the path of gds
   
4. echo LAYOUT PATH "<Your_Path>/standcells.gds">Header.conf
   
5. #print one of cell name list in this loop
   
6. echo LAYOUT PRIMARY "$i">>Header.conf
   
7. #set the path of translated spice
   
8. echo PEX NETLIST "<Your_Path>/subckts/$i.sp"HSPICE 1 LAYOUTNAMES >>Header.conf
   
9. #include calibre xrc command file
   
10. echo INCLUDE "calibre.rcx">Header.conf
    
11. #begin to run calibre pex
    
12. source runpex.script
    
13. end

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runpex.script:

1. #remove temp directory of previous cell
   
2. rm -rf svdb
   
3. rm -rf template
   
4. #begin to translate gds to spice netlist
   
5. calibre-xrc -phdb-nowait-turbo Header.conf tee pexrunlog_phdb.log
   
6. calibre -xrc-pdb-rcc-64 -nowait-turbo Header.conf tee pexrunlog_pdb.log
   
7. calibre-xrc -fmt -rcc-64 -nowait Header.conf tee pexrunlog_fmt.log

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上述脚本完成后，生成所有的spice网表在subckts目录下面。

3. 开始siliconsmart的执行流程。

目录结构：

work --config/
|-lib/
|-mylibrary/
|-subckts/
run.tcl

config目录存放configure.tcl

lib目录存放原始lib库。

subckts为spice网表目录，model通常位于pdk目录，此处不再说明。

mylibrary为生成的lib目录。

run.tcl为执行脚本。

configure.tcl为corner和lib设定文件：

1. #configure.tcl
   
2. #See SiliconSmart User Guide Appendix B for a complete list of parameters and definitions
   
3. 
   
4. #################################
   
5. # OPERATING CONDITIONS DEFINITION
   
6. #################################
   
7. #
   
8. # Create one or more operation conditions here.  Example:
   
9. #
   
10.     create_operating_condition tt_3p3v_25c
    
11.     set_opc_process tt_3p3v_25c {
    
12.         {.lib "<your path>/models/gl018.l" tt_3v}
    
13.     }
    
14.     add_opc_supplies tt_3p3v_25c VDD 3.3
    
15.     add_opc_grounds tt_3p3v_25c GND 0.0
    
16.     set_opc_temperature tt_3p3v_25c 25
    
17. #
    
18. 
    
19. 
    
20. #################################
    
21. # GLOBAL CONFIGURATION PARAMETERS
    
22. #################################
    
23. define_parameters default {
    
24. 
    
25.     # List of operating conditions as defined by create_operation_condition
    
26.     set active_pvts { tt_3p3v_25c }
    
27. 
    
28.     # If using IBIS, one operating condition must be specified in ibis_typ_pvt
    
29.     # set ibis_typ_pvt tt_3p3v_25c
    
30. 
    
31.     # FINESIM
    
32. #    set simulator finesim
    
33. #    set simulator_cmd {finesim_spice -w <input_deck> -o <listing_file> >&/dev/null}
    
34. 
    
35.     # FINESIM EMBEDDED
    
36.     # set simulator finesim_embedded
    
37. 
    
38.     # HSPICE
    
39.      set simulator hspice
    
40.      set simulator_cmd {hspice <input_deck> -o <listing_file>}
    
41. 
    
42.     # HSPICE (client/server mode)
    
43.     # set simulator hspice_cs
    
44.     # set simulator_cmd {hspice -CC <input_deck> -port <port_num> -o <listing_file>}
    
45.    
    
46.     # SPECTRE
    
47.     # set simulator spectre6
    
48.     # set simulator_cmd {spectremdl -tab -batch <mdl_file> -design <input_deck> <listing_file> >&/dev/null}
    
49.    
    
50.     # ELDO
    
51.     # set simulator eldo
    
52.     # set simulator_cmd {eldo -compat -i <input_deck> > <listing_file> >&/dev/null}
    
53. 
    
54.     # MSIM
    
55.     # set simulator msim
    
56.     # (csh)
    
57.     # set simulator_cmd {msim -hsp -i <input_deck> -o <listing_file> >&/dev/null}
    
58.     # (sh)
    
59.     # set simulator_cmd {msim -hsp -i <input_deck> -o <listing_file> 2>/dev/null}
    
60.    
    
61. 
    
62.     # Default simulator options for Finesim, Hspice, Spectre, Msim, and Eldo
    
63.     set simulator_options {
    
64.         "common,finesim: finesim_mode=spicehd finesim_method=gear finesim_speed=0 finesim_dvmax=0.1"
    
65.        
    
66.         "common,hspice: probe=1 runlvl=5 numdgt=7 measdgt=7 acct=1 nopage"
    
67.        
    
68.         "common,spectre6: compression=yes step=10ps maxstep=1ns relref=allglobal"
    
69.         "common,spectre6: method=trap lteratio=4 gmin=1e-18 autostop=0 save=none"
    
70. 
    
71.         "common,msim: probe=1 accurate=1"
    
72.        
    
73.         "common,eldo: gmindc=1n gmin=1p itl1=500 ingold=1 numdgt=4 measout=0 cptime=18000 relvar=0.01"
    
74.         "op,eldo: dv=0.5 method=gear"
    
75.         "tran,eldo: brief=0 relvar=0.001"
    
76.         "optimize,eldo: lvltim=3 relvar=0.001"
    
77.         "power,eldo: method=gear"
    
78.     }
    
79. 
    
80. # Constraint settings:
    
81.         # independent/dependent/dependent-setup/dependent-hold
    
82.         set constraint_mode dependent
    
83.        
    
84.         set smc_constraint_style relative-degradation
    
85.         set smc_degrade 0.1
    
86.         set path_constraint_mode off
    
87.        
    
88.     # Simulation resolution
    
89.     set time_res_high 1e-12
    
90.     set time_res_low 100e-12
    
91.    
    
92.     set nochange_variance [expr $time_res_high * 4.0]
    
93.     set nochange_threshold 0.1
    
94. 
    
95.     # Controls which supplies are measured for power consumption
    
96.     set power_meas_supplies { VDD }
    
97. 
    
98.     # list of ground supplies used (required for Functional Recognition)
    
99.     set power_meas_grounds { GND }
    
100. 
     
101.         set power_stabilization_threshold 0.05
     
102.         set power_stabilization_threshold_absolute 1e-12
     
103.        
     
104.         set model_negative_constraints true
     
105.         set model_negative_delays true
     
106.         set model_significant_digits 4
     
107.         set model_ecsm_cin false
     
108.         set liberty_cap_unit "1pf"
     
109.         set Liberty_time_unit "1ns"
     
110.         set liberty_increasing_delay_with_load off
     
111.         set liberty_increasing_delay_with_slew off
     
112.         set liberty_max_capacitance 0
     
113.         set liberty_max_transition 0
     
114.         set liberty_leakage_power_unit "1mW"
     
115.         set model_mpw_attribute false
     
116.        
     
117.     # specifies which multi-rail format to be used in Liberty model; none, v1, or v2.
     
118.     set liberty_multi_rail_format v2
     
119. 
     
120.     # LOAD SHARE PARAMETERS
     
121.     #  job_scheduler: 'lsf' (Platform), 'grid' (SunGrid), or 'standalone' (local machine)
     
122.     set job_scheduler standalone
     
123.     set run_list_maxsize 1
     
124.     set normal_queue "lsf_queue_name"
     
125.     set scheduler_poll_time 10
     
126. }
     
127. 
     
128. 
     
129. ############################
     
130. # DEFAULT PINTYPE PARAMETERS
     
131. ############################
     
132. pintype default {
     
133. 
     
134.     set logic_high_name VDD
     
135.     set logic_high_threshold 0.7
     
136. 
     
137.     set logic_low_name GND
     
138.     set logic_low_threshold 0.3
     
139. 
     
140.     set prop_delay_level 0.5
     
141.     set prop_delay_current 0.1
     
142.    
     
143.     set driver_rise_time 10e-12
     
144.     set driver_fall_time 10e-12
     
145. 
     
146.     # Number of slew and load indices
     
147.     # (when importing with -use_default_slews -use_default_loads)
     
148.     set numsteps_slew 6
     
149.     set numsteps_load 6
     
150.     set constraint_numsteps_slew 3
     
151. 
     
152.     # Operating load ranges
     
153.     set smallest_load 3e-15
     
154.     set largest_load 6e-13
     
155. 
     
156.     # Operating slew ranges
     
157.     set smallest_slew 20e-12
     
158.     set largest_slew 3e-9
     
159.     set max_tout 1.0e-9
     
160. 
     
161.     # Automatically determine largest_load based on max_tout; off or on
     
162.     set autorange_load off
     
163. 
     
164.     # Noise of points in for noise height
     
165.     set numsteps_height 8
     
166. 
     
167.     # Input noise width.
     
168.     set numsteps_width 5
     
169. 
     
170.     # driver model: pwl, emulated, active, active-waveform, custom
     
171.     set driver_mode emulated
     
172. 
     
173.     # driver cell name (relevant only when driver_mode is "active")
     
174.     set driver pwl
     
175. }
     
176. 
     
177. 
     
178. #####################################
     
179. # LIBERTY MODEL GENERATION PARAMETERS
     
180. #####################################
     
181. define_parameters liberty_model {
     
182.     # Add Liberty header attributes here for use with "model -create_new_model"
     
183.     set delay_model "table_lookup"
     
184.     set default_fanout_load 1.0
     
185.     set default_inout_pin_cap 9999
     
186.     set default_input_pin_cap 9999
     
187.     set default_output_pin_cap 0.0
     
188.     set default_cell_leakage_power 0.0
     
189.     set default_leakage_power_density  0.0
     
190.    
     
191.     set slew_lower_threshold_pct_rise 30.0
     
192.     set slew_lower_threshold_pct_fall 30.0
     
193.     set slew_upper_threshold_pct_rise 70.0
     
194.     set slew_upper_threshold_pct_fall 70.0
     
195.    
     
196.     set input_threshold_pct_fall 50.0
     
197.     set input_threshold_pct_rise 50.0
     
198.     set output_threshold_pct_fall 50.0
     
199.     set output_threshold_pct_rise 50.0
     
200. }
     
201. 
     
202. 
     
203. #######################
     
204. # VALIDATION PARAMETERS
     
205. #######################

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其中各个option不在细述。

run.tcl

1. set char_point testcase1
   
2. create ${char_point}
   
3. exec cp config/configure.tcl ${char_point}/config/
   
4. set_location ${char_point}
   
5. set cells {INV1 NAND2}
   
6. import -liberty lib/.lib -netlist_dir subckts/netlists -ext .sp
   
7. exec cp config/INV1.inst ${char_point}/control/INV1.inst
   
8. exec cp config/NAND2.inst   ${char_point}/control/NAND2.inst
   
9. configure -timing  $cells
   
10. characterize $cells
    
11. #characterize all
    
12. model -create_new_model -file ./mylibrary/new_typ.lib all -library_type typ

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执行：

bsub -Is siliconsmart run.tcl

或者进入siliconsmart界面：

source run.tcl

以上为基本流程，后续再详细说明如何批量处理多个corner的情况。

populaa

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曦玄

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