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-====== Running VLSI design platforms ======
-[ __[[vlsi:home|VLSI Home]]__ ]
-[ __[[vlsi:workbook|VLSI Design WorkBook]]__ ]
-[ __[[vlsi:computing_main#contents|Back to index]]__ ]
-== Contents ==
-   * [[vlsi:computing_cdsterm#introduction|Introduction]]
-   * [[vlsi:computing_cdsterm#main_initialization_script|Main initialization script]]
-   * [[vlsi:computing_cdsterm#run_cadence_executables|Run Cadence executables]]
-   * [[vlsi:computing_cdsterm#start_a_vanilla_environment|Start a vanilla environment]]
-   * [[vlsi:computing_cdsterm#manual_configuration|Manual configuration]]
-**Keywords:** UNIX environment, environment variable, search path, initialization script, Cadence, technology,
-vanilla environment
-===== Introduction =====
-Before you can run any licensed VLSI tools you need to set necessary UNIX **environment variables**
-and add **executables** to the system **search path**. The runtime environment must be set
-every time you start a session work, but all the stuff is automatically done for you by an
-**interactive initialization script** provided by the VLSI system administrator, as described below.
-===== Main initialization script =====
-The general setup script is named ''cdsterm'' and is located in the ''/usr/local/bin/'' directory,
-which should already be included in your default search path. Please, check it out using
-the ''which'' command,
-<code>
-which cdsterm
-/usr/local/bin/cdsterm
-</code>
-\\
-The script is a **tcsh script** that interactively sets environment variables and adds search paths
-for different design platforms and technologies.
-To launch the script, move into your working directory and simply type ''cdsterm''
-at the command line
-<code>
-cd ~/scratch/<tech_dir>
-cdsterm
-</code>
-or equivantely source the script with
-<code>
-source /usr/local/bin/cdsterm
-</code>
-\\
-At first you are prompted to choose the **design suite** you want to work with:
-<code>
-Select Cadence product :
-				[1a] IC  5.1.41HF137
-				[1b] IC  6.1.3
-				[1c] IC  6.1.4
-				[1d] IC  6.1.5
-				[2a] RC  8.10
-				[2b] RC  9.10
-				[2c] SOC 8.10
-				[2d] EDI 9.12
-				[3a] SPB 16.30
-				[3b] SPB 16.50
-</code>
-\\
-Type in the tool identifier and press the ''Return'' key. Available Cadence
-platforms are **IC** (//Virtuoso// full-custom analog and mixed-mode IC design),
-**RC** (Verilog/VHDL logic synthesizer), **SOC** (//SoC Encounter RTL-to-GDSII System//,
-digital place-and-route tool), **EDI** (//Encounter Digital Implementation System//,
-next generation digital place-and-route tool) and **SPB** (//Allegro// PCB design suite). \\
-The **Incisive** platform (Verilog/VHDL logic simulator) environment is included
-with both IC and RC setups.
-For more details about available tools see __[[computing_tools|Licensed softwares]]__.
-Next you have to select the **technology** with the same procedure:
-<code>
-Available tecnologies are :
-			[1a] AMS	0.35 um CMOS (c35b4)
-			[1b] AMS	0.35 um SiGe (s35d4)
-			[2a] IBM	0.13 um CMOS (cmrf8sf) - LM
-			[2b] IBM	0.13 um CMOS (cmrf8sf) - DM
-			[2c] IBM	  90 nm CMOS (cms9flp)
-		        [3a] ...
-                         ...
-                         ...
-</code>
-\\
-All VLSI users can work with AMS and IBM technologies. The access (using ''cdsterm'') to other cutting-edge
-technologies is restricted and it depends on the selected tool and on the user membership
-to a specific **technology group** defined by the system administrator. Technology
-permissions are verified by the ''cdsterm'' script and different lists of available
-technologies are shown in the menu. You can check yourself the technology you are allowed
-to use with the command
-<code>
-id -n -G
-</code>
-which prints username and groups. You can also inspect the ''/etc/group'' configuration file with
-<code>
-more /etc/group
-</code>
-\\
-Note that if the selected tool is Cadence SPB (//Allegro//) you are not asked to choose a technology.
-===== Run Cadence executables =====
-The ''cdsterm'' script modifies your UNIX environment, setting path and environment variables.
-Furthermore, once the technology has been selected the script opens a new **xterm** terminal and
-the overall UNIX environment set in the parent shell is exported into the new one.
-{{:vlsi:parent_shell_and_xterm.png?750}}
-You can make a comparison between your parent shell environment and the xterm exported environment typing
-<code>
-set
-</code>
-in the two different shells.
-\\
-Each design tool will be launched from the xterm command prompt by invoking its specific **executable
-name** with the general syntax
-<code>
-executable &
-</code>
-or
-<code>
-executable
-</code>
-\\
-Since environment variables and search paths have been exported in xterm, don't invoke
-a tool in the parent shell, you will get a ''Command not found'' issue otherwise.
-Depending on the selected tool follow the instructions listed below.
-   * [[computing_run_ic|Cadence IC (Virtuoso)]] FIXME
-   * [[computing_run_ius|Cadence Incisive]] FIXME
-   * [[computing_run_rc|Cadence RC]] FIXME
-   * [[computing_run_soc|Cadence SOC]] FIXME
-   * [[computing_run_edi|Cadence EDI (Encounter)]] FIXME
-   * [[computing_run_spb|Cadence SPB (Allegro)]] FIXME
-If the first time  that you try running a tool you face any problems with the Cadence
-**license checking management**, please contact the VLSI system administrator
-([[mazza@NOSPAMto.infn.it]], remove NOSPAM in the address).
-Instructions for starting Cadence tools with a **technology-independent environment**
-are discussed in __[[vlsi:computing_cdsterm#start_a_vanilla_environment|
-Start a vanilla environment]]__.
-===== Start a vanilla environment =====
-Cadence design platforms are completely general and can support different
-fabrication technologies. When a particular technology is selected through
-the ''cdsterm'' initialization script, necessary UNIX environment variables (e.g. the PDK installation
-directory) are set and specific technology-related files (e.g. ''.cdsinit_tech'' file)
-are loaded at Cadence startup. \\
-Cadence environment setups and technology setups are kept separate.
-Each platform has its own configuration script placed in the ''/usr/local/config/cds_config/''
-directory,
-<code>
-ls -l /usr/local/config/cds_config
-</code>
-which is then sourced in the ''cdsterm'' according to the selected design platform.
-For **getting started training** purposes you are not required to run
-Cadence platforms attached to a process design kit.
-You can always start a //vanilla// (technology-independent) Cadence environment,
-all you need is to **source by hand** the right platform configuration script.
-As a matter of fact, //schematic level simulations// (pre-layout simulations)
-in **Cadence IC** (Virtuoso) can be always performed using simple SPICE device
-models that can be found on the Web as well as in many microelectronics textbooks.
-On the other hand, //Verilog/VHDL logic simulations// (pre-synthesis simulations)
-with **Cadence Incisive** only require the hardware description language source code.
-Furthermore, the above-mentioned Cadence SPB (Allegro) used in designing PCBs
-is technology-independent. A specific technology is required indeed if you want to do
-full-custom analog layout with Cadence IC or if you deal with digital synthesis and
-place-and-route with Cadence RC and Cadence SOC/EDI respectively. \\
-According to this, the most part of WorkBook tutorials can be carried out with a simple
-Cadence IC 6.1.x vanilla environment (the latest software release is 6.1.5).
-To set up a Cadence IC 6.1.5 vanilla environment, move into your working
-directory (''~/scratch/tutorials'' in the WorkBook tutorials) and
-source by hand the ''/usr/local/config/cds_config/CdsIC_615.rc'' script:
-<code>
-cd ~/scratch/tutorials
-setenv IC_DIR /usr/cadence/IC_6.1.5
-source /usr/local/config/cds_config/CdsIC_615.rc
-</code>
-\\
-You should launch a new **xterm** instance in order to export the UNIX environment
-into a separate terminal, as usually performed by ''cdsterm'':
-<code>
-xterm &
-</code>
-\\
-The ''CdsIC_615.rc'' script defines the proper UNIX environment
-for both Cadence IC 6.1.5 and Incisive 10.20 platforms, hence you
-will be able to work through either analog or digital tutorials.
-\\
-:!: **//Note//**\\
-The procedure doesn't work out of the box because
-a ''MANPATH'' environment variable is required in
-''/usr/local/config/cds_config/CdsIC_615.rc''.
-You should retrive a ''MANPATH: Undefined variable'' error in fact,
-<code>
-source /usr/local/config/cds_config/CdsIC_615.rc
-MANPATH: Undefined variable
-</code>
-\\
-To solve the problem, just set by hand an empty ''MANPATH''
-environment variable (this is normally done by ''cdsterm'' itself
-if ''MANPATH'' does not exist) before sourcing the script,
-<code>
-setenv MANPATH ""
-source /usr/local/config/cds_config/CdsIC_615.rc
-</code>
-or define your own ''MANPATH'' environment variable in the home ''.cshrc''
-(don't forget to source the file to make changes effective).
-===== Manual configuration =====
-If you are more confident with shell scripting you can write your own initialization script
-(e.g. ''~/scratch/<tech_dir>/setup.csh'') and set up the proper UNIX environment to run a
-particular Cadence tool attached to the specific technology you are working with. \\
-More knowledge of the required UNIX environment will help you
-to fix yourself the most common problems related to missing environment variables, wrong paths etc.
-Create local copies of ''cdsterm'' and ''/usr/local/config/cds_config/''
-configuration files provided by the VLSI system administrator, e.g.
-<code>
-cd ~/scratch
-mkdir setup
-cd setup
-cp /usr/local/bin/cdsterm cdsterm.local
-cp /usr/local/config/cds_config/CdsIC_615.rc CdsIC_615.rc.local
-...
-</code>
-\\
-Then use your preferred text editor to inspect the syntax and the content of
-the different files. Pay attention to the license management and
-learn which technology-dependent environment variables are set in the ''cdsterm''
-for the specific technolgy you are working with.
-For more details about any technology setup refer to the documentation
-contained in the __[[vlsi:private:home|VLSI protected area]]__.
-Put in your file necessary UNIX environment variables and paths. Once the script is
-ready you can either source
-<code>
-source setup.csh
-</code>
-or run it (don't forget to make the file executable with the ''chmod'' command before)
-<code>
-chmod +x setup.csh
-./setup.csh
-</code>
-\\
-A complete example of configuration for Cadence IC can be found at
-//[[https://intranet.ece.cornell.edu/computing/kb_articles/kba_detail.cfm?article_id=53]]//
-\\
-If you are confused indeed, please keep using the main ''cdsterm'' setup script.
-====== ======
-\\
-----
-Last update: [[ pacher@NOSPAMto.infn.it | Luca Pacher ]] - Apr 9, 2013
-~~NOTOC~~