Simulator

Usage (Hello World Example)

To run a simulation you must go into the messy directory:

cd /messy/messy/

Then we can run python:

python3 messy.py -f codegen/pulp_open.json -a /messy/examples/helloworld

This code will build and execute the helloworld example. You should see the following output:

Entering main controller
[31 0] Hello World!
Cluster master core entry
[0 7] Hello World!
[0 6] Hello World!
[0 5] Hello World!
[0 4] Hello World!
[0 3] Hello World!
[0 2] Hello World!
[0 0] Hello World!
[0 1] Hello World!
Cluster master core exit
Bye !

Messy.py Explanation

The messy.py python scripts expects 2 arguments:

1. The first one is the file name of the chosen configuration. In the example, the basic pulp-open configuration is used.
2. The second one if the path of the folder of the application.

MESSY, during the build process, also the C++ SystemC-AMS sources of the used configuration (sensors, batteries etc.). Afterward it builds everything. The last step is to gather the configuration of the Instruction Set Simulator (ISS) and runs the simulation.

This python script, will then launch as a subprocesses some Makefile targets. Many RISC-V Instruction Set Simulators require to have a configuration file (i.e. memory and peripheral structure). These subprocesses will generate all of them. At the end of the build process, you should have 3 files inside the folder under /messy/messy/gvsoc_deps: 1. gvsoc_config.json 2. hyperflash.bin 3. spiflash.bin