Focal Plane Sensor Processor Simulator

A parameterisable simulation library to model and emulate different FPSP architectures. Currently only the SCAMP-5 architecture has been (mostly) implemented. The SCAMP-5 API documentation can be found here .

Requirements:

• C++
• Cmake
• Conan

Composed of two parts: the simulation library and the architecture you're simulating. The existing CMakeLists.txt will build the library first and then the SCAMP-5 architecture.

Compile time options

There are various compile time options which conditionally compile code. The options can be toggled in the CMakeLists.txt file or by passing in the option to CMake, e.g. cmake -DCMAKE_BUILD_TYPE=release .. -DTRACK_STATISTICS=1.

Tracking statistics is expensive and will drastically slow down execution.

Name	Description	Default
USE_RUNTIME_CHECKS	Checks arguments at runtime and emits warnings.	OFF
TRACK_STATISTICS	Tracks statistics such as register reads and energy use	OFF

Build - (release|debug)

(remmeber to remove the brackets around the choice before running)

• Clone repo
• mkdir cmake-build-(release|debug) && cd cmake-build-(release|debug)
• conan profile update settings.compiler.libcxx=libstdc++11 default
• conan create ../conanfile.py -s build_type=(Release|Debug)
• conan install ../conanfile.txt -s build_type=(Release|Debug) --build missing
• cmake -DCMAKE_BUILD_TYPE=(release|debug) ..
• make -j

Runtime configuration

The simulator can be configured with a json file passed in as the first argument. There is an example config.json file in examples/.

The format is hierarchical and relates directly to classes in the simulator.

The main fields are explained here:

Field name	Required	Default	Description
architecture	true	N/A	The name of the architecture that is being simulated. The architecture must be registered and should be a subclass of the Architecture class. See SCAMP5.cpp for an example architecture
frames	false	1000	The number of frames to run the program for. A negative number is interpreted as infinite, i.e. run forever
frame_time	false	true	Prints the amount of time in ms to process each frame from beginning to end to stdout
with_stats	false	false	If this is enabled the statistics of the run will be printed at the end. Must be compiled with statistics support for this to do anything
ui_enabled	false	false	Should the web UI server be enabled
ui_registers_to_display	true if ui_enabled is set	false	The registers to display on the web UI. Must be defined in the config somewhere and added to the cache (or a property of the architecture)
_inherit	false	false	Special field. Sometimes the child component needs to inherit from the parent. This is achieved by use of this special field. The field must be a list of all fields to inherit which have been defined previously. Inheritance is not strictly limited to parents. In fact any property defined previously at any level can be used. This means that if you define the same property in different components only the latest will be preserved.
_name	false	false	Special field. Defines the identifier of the component
_component	false	false	Specifal field. The component class. Must match exactly so the correct class can be found and constructed

The architecture set in the architecture field must be defined as an object. This part is hierarchical. You can add define each component that is necessary in the definition of the architecture.

Each architecture or component must have an empty constructor which will be called first to construct the object. The constructor must be registered.

Each field in the definition of the component must have a matching registered setter in the architecture or component class. For example the field rows must have a setter called set_rows(int) in the architecture class. The setter must always be named set_+FIELD.

More complicated fields will likely also need a converter method. This method must have the signature rttr::variant FIELD_converter(json& j) orrttr::variant FIELD_converter(json& j, std::unordered_map<std::string, rttr::variant>& cache) if you want to be able to add to the cache.

If you want to do something after all the fields have been set (basically a pseudo constructor), then register a void init() method which will be called last if it exists.

UI

There is a browser based UI which can be used to display the outputs of the registers in realtime. You can use it like this:

UI& ui = UI::get_instance();

Then in the main loop, you can display a register by calling

ui.display_reg(REGISTER_HERE);

which will send the image to the web client.

By default the client can be accessed at localhost:3000

Tests

The test suite can be run with make test after the above build steps.

Alternative you can run the tests binary in the bin folder which has many more options. Run ./tests -? to see available options.

Usage

Once you have a simulator binary built you can run it with a config and a program like this: ./simulator config.json program.txt