BeagleBoard/GSoC 2021/Micropython for BeagleConnect Freedom
Student: new student
Mentors: Jason Kridner
GSoC: GSoC entry
This project is currently just a proposal.
Please complete the requirements listed on the ideas page and fill out this template.
IRC: Freenode IRC nickname
Github: Github account
School: School name
Primary language (We have mentors who speak multiple languages): Language
Typical work hours (We have mentors in various time zones): 8AM-5PM US Eastern
Previous GSoC participation: Tell us why you want to participate in GSoC here. Also, provide list of URLs for any previous GSoC participation with any organizations.
About your project
Project name: Micropython for BeagleConnect Freedom
BeagleConnect is a revolutionary technology which eliminates low-level software development for IoT and IIoT applications,such as building automation, factory automation, and home automation.What sets it apart is that it eliminates the need of relying on software libraries enabling it to be used for interfacing a greater number of sensors, actuators and indicators for communicating over various networks compared to other conventional solutions.This can be achieved since it is built with fully open source software with submissions to mainline Linux and Zephyr repositories to aide in support and porting.
The BeagleConnect Freedom is based on the TI CC1352 and is the first available BeagleConnect solution which runs the Zephyr RTOS and has mikroBUS ports along with BLE and Sub-GHz radios on it.The BeagleConnect has a few technologies at the core namely IPv6 (via 6LoWPAN),Zephyr support for IEEE 802.15.4 and Greybus from Project Ara.
The goal of this project is to port Micropython and Circuitpython support along with GPIO, I2C, SPI, PWM,UART and ADC drivers support in Micropython for the BeagleConnect solution.After the porting is completed and the drivers have been inculcated,the practicality will be thoroughly tested with the help of MikroElektronika click boards of each respective protocol and documented on my blog.
MicroPython is a completely free and open source software that is a lean and efficient implementation of the Python 3 programming language that includes a small subset of the Python standard library and is optimised to run on microcontrollers and in constrained environments.A few of its salient features that will be advantageous for the BeagleConnect include:
- It provides an interactive prompt (the REPL) to execute commands immediately, along with the ability to run and import scripts from the built-in filesystem. The REPL has history, tab completion, auto-indent and paste mode for a great user experience.
- Highly configurable due to many compile-time configuration options
- Code coverage at 98.4% for the core and at 96.3% for the core plus extended modules
There is ample of documentation related to porting Micropython to the Zephyr RTOS Running on Beagleconnect. The most comprehensive guide can be found in the MicroPython port to Zephyr RTOS repository.
- I will start with installing Zephyr SDK, getting Zephyr source code, and setting up development environment followed by configuring the environment, for example by sourcing zephyrproject/zephyr/zephyr-env.sh.
- I will then clone the MicroPython repository into the home directory and build the Zephyr port for the BeagleConnect Freedom board like this:
west build -b ~/micropython/ports/zephyr
- Followed by this is I will flash it to the board and start a gdb debug session using:
If I find any difficulty while navigating through I will rely on the Micropython repository and the Micropython forum page.
CircuitPython is a programming language designed to simplify experimenting and learning to program on low-cost microcontroller boards.It is majorly built for Adafruit devices and has an active community base.CircuitPython is designed with education in mind. It's easy to start learning how to program and the user gets immediate feedback from the board.This will enable even a novice user to take complete advantage of the BeagleConnect Freedom device.A few of its salient features that will be advantageous for the BeagleConnect include:
- The serial console and REPL allow for live feedback from your code and interactive programming
- The internal storage for CircuitPython makes it great for data-logging, playing audio clips, and otherwise interacting with files.
- There is no compiling, no downloading and no uploading needed due to which it runs immediately just after creating a file, editing the code and saving the file.
The core code of MicroPython is shared amongst ports including CircuitPython. There is also Documentation released by Adafruit for creating ones own port.
- The first step would be creating a UF2 Port by Cloning the Adafruit uf2-samdx1 repository followed by creating a new folder in boards/ with the particular board name.I will also refer other board files as examples for how to fill out the board files.
- The next step will be cloning the Adafruit CircuitPython repository and creating a new folder with the board name.
For reference purposes i will constantly refer the Circuitpython Documentation and the forums for effective flow of the porting process.
I will test various pins and features of the board using some hardware line LEDs, resistors and EEPROM after each individual port.Pull requests will be generated for all the work done to the respective upstream repositories.
3)Writing drivers in Micropython:
I will be following a general procedure as given below for writing GPIO, I2C, SPI, PWM,UART and ADC drivers for the BeagleConnect Freedom.Once done I will test it with MikroElektronika click boards,2 boards supporting each protocol to validate operation of both simultaneously as well as combined with another board using some other protocol.
Procedure for drivers in Micropython:
The BeagleConnect Freedom is based on the CC1352R Launchpad development kit,which houses the SimpleLink CC1352R wireless MCU.A structured approach for writing drivers would be
- To first go through the memory map of the micro controller present in its datasheet.
- After obtaining the range of memory addresses where the peripherals are located,the memory address associated with each peripheral can be obtained.
- From the memory address the register map can be observed from where we can incur each offset address of a register which is basically a word for the microcontroller to perform a particular action.
A sample code for the UART protocol can be seen as follows:
From machine import UART
Here we import the UART class,we initialise an instance and we pass as constructor parameters the settings we need to configure after which we can use simple methods like read and write to get data to and from the device.
A list of constructors and methods for writing each driver can be found on the Micropython official website:
1)Universal asynchronous receiver-transmitter (UART)
3)Serial Peripheral Interface (SPI)
4)Pulse Width Modulation(PWM)
5)Analog to Digital Converter(ADC)
The official document by the Micopython is a great resource to refer to in general.
Provide a development timeline with a milestone each of the 11 weeks and any pre-work. (A realistic timeline is critical to our selection process.)
|Mar 29||Applications open, Students register with GSoC, work on proposal with mentors|
|Apr 13||Proposal complete, Submitted to https://summerofcode.withgoogle.com|
|May 17||Proposal accepted or rejected|
|Jun 07||Pre-work complete, Coding officially begins!|
|Jun 17||Milestone #1, Introductory YouTube video|
|June 24||Milestone #2|
|June 30||Milestone #3|
|July 12 18:00 UTC||Milestone #4, Mentors and students can begin submitting Phase 1 evaluations|
|July 16 18:00 UTC||Phase 1 Evaluation deadline|
|July 23||Milestone #5|
|July 30||Milestone #6|
|Aug 06||Milestone #7|
|August 10||Milestone #8, Completion YouTube video|
|August 16 - 26 18:00 UTC||Final week: Students submit their final work product and their final mentor evaluation|
|August 23 - 30 18:00 UTC||Mentors submit final student evaluations|
Experience and approach
In 5-15 sentences, convince us you will be able to successfully complete your project in the timeline you have described.
What will you do if you get stuck on your project and your mentor isn’t around?
If successfully completed, what will its impact be on the BeagleBoard.org community? Include quotes from BeagleBoard.org community members who can be found on http://beagleboard.org/discuss and http://bbb.io/gsocchat.
Please complete the requirements listed on the ideas page. Provide link to pull request.
Is there anything else we should have asked you?