In the first-year course "Computer Architecture" at Haute École du Paysage d’Ingénierie
et d’Architecture (HEPIA), students design and implement a very simple yet functional
8-bit RISC processor called HEPIA-RISC (HR). This allows them to thoroughly understand
concepts such as instruction decoding, registers, jumps, the Arithmetic Logic Unit (ALU)
and memory access. This processor is developed in Logisim, an educational tool for design-
ing and simulating digital logic circuits, and then compiled into programmable logic on a
Field-Programmable Gate Array (FPGA), which is programmed onto a Xilinx board. The
code executed on this processor is written in a specific assembly language and then stored in
a Read-Only Memory (ROM), which is subsequently read and decoded by the processor dur-
ing execution. The course culminates in a project involving the processor and an attached robot.
## Getting started
To make it easy for you to get started with GitLab, here's a list of recommended next steps.
Already a pro? Just edit this README.md and make it your own. Want to make it easy? [Use the template at the bottom](#editing-this-readme)!
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-[ ] [Add files using the command line](https://docs.gitlab.com/ee/gitlab-basics/add-file.html#add-a-file-using-the-command-line) or push an existing Git repository with the following command:
-[ ] [Set up project integrations](https://gitedu.hesge.ch/flg_bachelors/tb/hepiarisc_compiler_emulator/-/settings/integrations)
## Collaborate with your team
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The development process to test and validate the processor (and the executed program)
is lengthy, taking several minutes for each iteration. To address this, HEPIA wishes to provide
the students with a high-level compiler and an emulator for this architecture. This project aims
to provide both of these tools and to modify the HR architecture in a meaningful way to make
their implementation possible.
***
## Installation
# Editing this README
- The customasm rules file and an example are in asm/
- Documentation for Assembler instruction is provided as a cheatsheet in docs/
- bin2vhdl program is provided with its Makefile
- Hepia-RISC .circ file is provided in hepiariscv2/
- The patch for qemu version 8.0.50 is in qemu-hr/qemu-hr.patch
When you're ready to make this README your own, just edit this file and use the handy template below (or feel free to structure it however you want - this is just a starting point!). Thanks to [makeareadme.com](https://www.makeareadme.com/) for this template.
## Usage
## Suggestions for a good README
### customasm
Every project is different, so consider which of these sections apply to yours. The sections used in the template are suggestions for most open source projects. Also keep in mind that while a README can be too long and detailed, too long is better than too short. If you think your README is too long, consider utilizing another form of documentation rather than cutting out information.
Compilation to binary :
## Name
Choose a self-explaining name for your project.
```
customasm file.asm
```
## Description
Let people know what your project can do specifically. Provide context and add a link to any reference visitors might be unfamiliar with. A list of Features or a Background subsection can also be added here. If there are alternatives to your project, this is a good place to list differentiating factors.
Compilation to annotated binary for debugging :
## Badges
On some READMEs, you may see small images that convey metadata, such as whether or not all the tests are passing for the project. You can use Shields to add some to your README. Many services also have instructions for adding a badge.
```
customasm file.asm -f annotated
```
## Visuals
Depending on what you are making, it can be a good idea to include screenshots or even a video (you'll frequently see GIFs rather than actual videos). Tools like ttygif can help, but check out Asciinema for a more sophisticated method.
### bin2vhdl
## Installation
Within a particular ecosystem, there may be a common way of installing things, such as using Yarn, NuGet, or Homebrew. However, consider the possibility that whoever is reading your README is a novice and would like more guidance. Listing specific steps helps remove ambiguity and gets people to using your project as quickly as possible. If it only runs in a specific context like a particular programming language version or operating system or has dependencies that have to be installed manually, also add a Requirements subsection.
```
./bin2vhdl <input_binary_file> <output_vhdl_file>
```
## Usage
Use examples liberally, and show the expected output if you can. It's helpful to have inline the smallest example of usage that you can demonstrate, while providing links to more sophisticated examples if they are too long to reasonably include in the README.
### qemu-hr
## Support
Tell people where they can go to for help. It can be any combination of an issue tracker, a chat room, an email address, etc.
Launching program :
## Roadmap
If you have ideas for releases in the future, it is a good idea to list them in the README.
State if you are open to contributions and what your requirements are for accepting them.
Debugging (List of available commands) :
For people who want to make changes to your project, it's helpful to have some documentation on how to get started. Perhaps there is a script that they should run or some environment variables that they need to set. Make these steps explicit. These instructions could also be useful to your future self.
| **Command** | **Description** |
|-------------|-----------------|
| regs | Prints the value of the internal registers |
| cont | Continue execution until the next breakpoint |
| bradd <addr> | Adds a breakpoint at the specified address |
|brdel <addr> | Deletes the breakpoint at the specified address |
|next | Executes the next instruction only |
|restart | Restarts the program |
|exit | Exits the program |
|brp | Prints the list of current breakpoints |
|mems <addr><val> | Sets value of a memory space register (only available for peripherals) |
|memp <addr><n> | Prints the value n (1 if omitted) memory space |register(s) |
You can also document commands to lint the code or run tests. These steps help to ensure high code quality and reduce the likelihood that the changes inadvertently break something. Having instructions for running tests is especially helpful if it requires external setup, such as starting a Selenium server for testing in a browser.
## Authors and acknowledgment
Show your appreciation to those who have contributed to the project.
## License
For open source projects, say how it is licensed.
Project done as Bachelor Thesis by Dylan Frei under superivision of Florent Glück
## Project status
If you have run out of energy or time for your project, put a note at the top of the README saying that development has slowed down or stopped completely. Someone may choose to fork your project or volunteer to step in as a maintainer or owner, allowing your project to keep going. You can also make an explicit request for maintainers.
