Getting Started with Embedded Python: MicroPython and CircuitPython
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This document provides an introduction to MicroPython and CircuitPython, which allow Python programming on microcontrollers. MicroPython is a stripped-down version of Python 3 that runs directly on microcontrollers. It includes APIs for hardware modules like GPIOs, UART, PWM, etc. CircuitPython is a fork of MicroPython maintained by Adafruit for use on their educational boards. The document discusses supported boards, functions, libraries, and ways to interact with MicroPython boards through the serial REPL, web REPL, file system, emulation, and demos blinking an LED and measuring temperature/humidity.
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![NeoPixel
> import machine, neopixel
# Initialize GPIO and number of pixels
> np = neopixel.NeoPixel(machine.Pin(4), 8)
# Set a Pixel color in RGB format
> np[0] = (255, 0, 0)
>np.write()
@iAyanPahwa/iayanpahwa](https://image.slidesharecdn.com/pyconmicropythonayan-171111213602/85/Getting-Started-with-Embedded-Python-MicroPython-and-CircuitPython-32-320.jpg)
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Getting Started with Embedded Python: MicroPython and CircuitPython
- 1. Getting Started with Embedded Python (MicroPython and CircuitPython) @iAyanPahwa/iayanpahwa
- 2. About Me Embedded Software Engineer at Mentor Graphics - A Siemens Business Part time blogger Full time maker Mentor Graphics is world leader in Electronics Design Automation(Tools Business). I work for Automotive Embedded Software Division, which deals in providing custom solutions, OS and BSP for IVI and ADAS systems. Contact: https://iayanpahwa.github.io
- 3. People who are really serious about software should make their own hardware - Alan Kay Motivation - @iAyanPahwa/iayanpahwa
- 5. What is MicroPython The MicroPython project is an open source implementation of Python 3 that includes a small subset of the Python standard libraries, and is optimised to run on microcontrollers with constrained environments like limited ROM, RAM and processing power. It came about after a successful Kick-starter campaign by Damien George. @iAyanPahwa/iayanpahwa
- 6. Python 3 IoT (Devices) Microcontrollers In a NutShell @iAyanPahwa/iayanpahwa
- 9. ~20MHz System Clock ~32Kb RAM ~16MB ROM Single Core Register Level Access Microcontrollers @iAyanPahwa/iayanpahwa
- 10. MicroPython - A small stripped down version on Python3 which runs as ๏ฌrmware on microcontrollers, exposes all the low level modules, acting as an operating system. - It is packed full of advanced features such as an interactive prompt, arbitrary precision integers, closures, list comprehension, generators, exception handling and more. - Yet it is compact enough to ๏ฌt and run within just 256k of code space and 16k of RAM. - MicroPython aims to be as compatible with normal Python as possible to allow you to transfer code with ease from the desktop to a microcontroller or embedded target. - Python APIs for low level hardware modules- GPIOs, UART, PWM, ADC, i2c, SPI. - Runs directly on bare-metal or under OS env or as emulator. @iAyanPahwa/iayanpahwa
- 11. Python vs ฮผPython vs Arduino Refer: https://github.com/micropython/micropython/wiki @iAyanPahwa/iayanpahwa
- 13. The PyBoard
- 14. The ESP8266 160Kb RAM 802.11 b/g/n 4MB Flash GPIO, ADC, I2c, SPI @iAyanPahwa/iayanpahwa
- 15. Functions & Libraries Supported @iAyanPahwa/iayanpahwa
- 16. Interaction Serial REPL (115200 BAUD RATE) WEB REPL, works over LAN File System mounts on host Tools to transfer source code(ex: AMPY) Emulation on linux host Unicorn web based emulator @iAyanPahwa/iayanpahwa
- 17. Interaction: Serial Loading uP on ESP8266 board Install esptool - pip install esptool Download uP firmware.bin from GitHub release pages for your board. Erase flash - esptool.py --port /path/to/ESP8266 erase_flash Flash uP firmware - esptool.py --port /path/to/ESP8266 -- baud 460800 write_flash --flash_size=detect 0 firmware.bin Connect Serial console - screen /dev/ttyโฆ 115200 @iAyanPahwa/iayanpahwa
- 18. Interaction: WebREPL Setting up WebREPL > import webrepl_setup > Enter โEโ to enable it > Enter and confirm password(defaults micropythoN) > Enter โyโ to reboot and save changes @iAyanPahwa/iayanpahwa
- 23. (DEMO) HELLO WORLD OF ELECTRONICS @iAyanPahwa/iayanpahwa
- 24. Interaction: Hello WORlD // Classic way of Blinking LED #include โBoard_De๏ฌnation_File.hโ int main(void) { while(1){ DDRB |= (1 << 7); PORTB |= (1 << 7); _delay_ms(1000); PORTB &= ~(1 << 7); _delay_ms(1000); } } // Make Pin Output // Send logic 1 to the pin //Send logic 0 to the pin @iAyanPahwa/iayanpahwa
- 25. Interaction: h3llO WORlD > from machine import Pin > from time import sleep # Make Pin behave as output > led = Pin(2, Pin.OUT) > while True: # Send digital logic 1 to the pin > led.on() > sleep(1) # Send digital logic 0 to the pin > led.off() > sleep(1) MicroPython Way @iAyanPahwa/iayanpahwa
- 26. Interaction: Advance File System on Flash to store: WiFi credentials (SSID, PASSOWRD) boot.py - POST operations main.py - main executable You can mount the fs over network, or transfer files over webREPL or tools like AMPY. @iAyanPahwa/iayanpahwa
- 27. CircuitPython https://github.com/adafruit/circuitpython Adafruit fork of MicroPython maintained for educational purpose around boards sell by Adafruit industries. Centred Around ATMEL SAMD21 and ESP8266 SoCs. Various new modules added like capacitive touch APIs, Sound outputs, USB HID etc. Bluetooth Low energy support with newly supported NRF SoC port.
- 28. DISCLAIMER: The stunts will be performed by experts under expert supervision and no matter how many times you test before, chances of live demo failures are incalculable :P SHOW TIME @iAyanPahwa/iayanpahwa
- 30. Temperature and Humidity Measurement > import dht, machine > from time import sleep # Make Pin behave as output > d = dht.DHT11(machine.Pin(4)) > while True: # Measure temp and humidity > d.measure() # Print Values > d.temperature() > d.humidity() > sleep(2) @iAyanPahwa/iayanpahwa
- 31. NeoPixel * 1 wire to control multiple LEDs, color and brightness. * 8-bit format for Red, Green, Blue * RRGGBB * 0-ff or 0-255
- 32. NeoPixel > import machine, neopixel # Initialize GPIO and number of pixels > np = neopixel.NeoPixel(machine.Pin(4), 8) # Set a Pixel color in RGB format > np[0] = (255, 0, 0) >np.write() @iAyanPahwa/iayanpahwa