C++TESK Testing ToolKit

h1. Frequently Asked Questions

* *Where is it possible to get C++TESK Testing ToolKit?*

The toolkit is located at the following link: http://forge.ispras.ru/projects/cpptesk-toolkit/files.

* *What are the steps to have the toolkit correctly installed?*

1. Download and unpack the archive with C++TESK Testing ToolKit (the lastest version) into a convenient folder;

2. Run install.sh from the folder with C++TESK Testing ToolKit;

3. Wait until "Successfully installed" appears.

The toolkit is installed into $(CPPTESK_HOME) folder. If this environment variable is missing, it will be assigned to $(ISPRAS_HOME)/tools/cpptesk-toolkit. If the varible $(ISPRAS_HOME) is missing, this varible first will be assigned to $HOME.

* *What other programs should be installed for verification of hardware designs?*

There are Icarus Verilog and VeriTool being able to be installed by means of $(CPPTESK_HOME)/bin/install-veritool.sh.

Icarus Verilog is installed into $(ICARUS_HOME), and VeriTool is installed into $(VERITOOL_HOME). If the variables are missing, they will be created like $(CPPTESK_HOME).

* *Is it possible to reduce size of the signal dump file (VCD)?*

E.g. in Icarus Verilog it is possible to choose different dump file format LXT2. The running command would be as follows: $(ICARUS_HOME)/bin/vvp -M. -mdb $(DB_VVP) -lxt2 -M. +scen=$@ +argv="$(TEST_ARGV)". To use GTKWave for viewing the file is possible if testbench.vcd is renamed to testbench.lxt.

* *What does the following message mean*

<pre>

 tests/src/scenarios/fifo_scen.cpp: In member function ''bool cpptesk::examples::fifo::FIFOScenario::scen_nop(cpptesk::ts::IntAbcCtx&)'':

 tests/src/scenarios/fifo_scen.cpp:62: error: jump to case label

 tests/src/scenarios/fifo_scen.cpp:55: error:   crosses initialization of ''int i''

</pre>

 *during compiling of the following code?*

<pre>

 50:bool FIFOScenario::scen_nop(Ctx& ctx)

 51:{

 52:    IBEGIN

 53:    IACTION

 54:    {

 55:        int i = 0;

 56:        // Refresh functional coverage

 57:        dut.refresh_coverage();

 58:        // Give control to the simulator for one cycle

 59:        dut.cycle();

 60:

 61:        // Take results of reference model working and check them

 62:        YIELD(dut.verdict());

 63:    }

 64:    IEND

 65:}

</pre>

There is an agreement not to declare local variables inside of IACTION first block. If a nested into IACTION block is used, the problem will disappear. Also it is possible to declare variables before IBEGIN.

* *How to call a serializer?*

It can be called by means of one of the following macro:

START_STIMULUS(SEQUENTIAL|PARALLEL)

RECV_STIMULUS(SEQUENTIAL|PARALLEL, Interface iface, Message msg)

* *What is the difference between START_STIMULUS and RECV_STIMULUS?*

START_STIMULUS starts serializer with default parameters (interface and message are the same as those given to the stimuli process). RECV_STIMULUS allows modifing both message and name of the interface used. The macro is also useful if there is a stimulus with more than one serializer call inside.