Espruino - JavaScript for Microcontrollers

Feb 21, 20160 likes388 views

Espurino allows programming microcontrollers with JavaScript. It runs on an STM32 board with a Cortex M3 CPU, Flash memory, GPIO pins and other interfaces. JavaScript can be used without compiling, modified during runtime, and has widespread usage and tutorials available. The Espruino board costs $40 and can be programmed over USB or via an online IDE. Examples show blinking LEDs, controlling strings of LEDs, and using timers. Tessel is another JavaScript board aimed at internet-connected devices with built-in WiFi. Micro Python brings the Python language to microcontrollers in a lean and optimized implementation.

Espurino
JavaScript for Microcontrollers
● Presenter: Drew Fustini (drew@pdp7.com / @pdp7)
● Website: http://www.espruino.com/
● Kickstarter:
https://www.kickstarter.com/projects/gfw/espruino-javascript-for-thing
● Videos:
https://www.youtube.com/playlist?list=PLa1tazUyp-oOELRUt6tSuZIo

Espruino - JavaScript for Microcontrollers

Why JavaScript?
● Doesn't need compiling
● Can be modified and added to while running
● Has good support for Strings, Objects, Maps and Arrays
● Has similar syntax to common languages like C, C++ (Arduino) and
Java
● Can easily be event-based
● Is widely used, easy to learn and flexible
● JavaScript is the obvious (and possibly the only) language that does
all this. Almost every website on the internet depends on it, and many
websites such as Codeacademy provide free tutorials and lessons.
Millions of people use it every day.
● We've tried to keep the API similar to Arduino's though - so if you've
done any Arduino programming you should feel right at home. Even
if you haven't, it means that a lot of what you learn with Espruino will
be transferrable to other platforms.

Tech specs
● STM32 32-bit 72MHz ARM Cortex M3 CPU
● 256KB of Flash memory, 48KB of RAM
● Micro USB connector
● Input Voltage Range of 3.6v to 15v
● Battery connector (JST 2 Pin)
●
Built-in SD card connector
● Red, Green and Blue LEDs
● Pads to allow HC-05 Bluetooth modules to be added
● 44 GPIO Pins, which can handle: 26 PWM Pins, 16 ADC Pins, 3 USARTs, 2 SPI, 2 I2C and 2
DACs
●
Prototype area which can be used in many different configurations, for example: Servo Headers,
Up to 14x 500mA outputs, 2x .NET Gadgeteer connectors, or NRF24L01+ wireless transceiver
modules
● WiFi Support with the TI CC3000 WiFi module (not included)

Price: $40 from Seeed
http://www.seeedstudio.com/depot/Espruino-board-

Option A) Connect via serial over USB
Option B) Web IDE (Chrome browser app)

Quick Start
● http://www.espruino.com/Quick+Start
● digitalWrite(LED1,1)
● digitalWrite(LED1,0)
● function toggle() { on = !on; digitalWrite(LED1, on); }
● toggle()
● var interval = setInterval(toggle, 500)
● edit(toggle)
● function toggle() { on = !on; digitalWrite(LED1, on);
digitalWrite(LED2, !on); }
● changeInterval(interval, 200);
● clearInterval(interval);
● rest() OR save()

Control string of LEDs
http://www.espruino.com/Individually+Addressable+LEDs
Video:
https://www.youtube.com/watch?v=hanahdauDiE&index=3&list=PLa1tazU

Another Javascript board: Tessel
● http://makezine.com/magazine/first-look-javascript-micro-controllers-for-
● “The Tessel from technical.io […] is aimed
on high end of the gap between the
Arduino and the Raspberry Pi, squarely at
Internet-connected applications targeting
physical devices, and has WiFi built-in.
That means not only that the board is
always online, allowing it to be used as
both as a server and a client, but you
have the ability to remotely deploy your
code onto the board via the network.”

Micro Python
● https://www.kickstarter.com/projects/214379695/micro-python-python
● http://www.micropython.org/
● “lean and fast implementation of the Python 3 programming
language that is optimised to run on a microcontroller. The
Micro Python board is a small electronic circuit board that runs
the Micro Python language”

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Embedded Linux Conference 2020: Linux on RISC-V with open source hardware and open source FPGA tools Want to run Linux on open hardware? This talk will explore Open Source Hardware projects capable of that task, and explore how RISC-V and free software FPGA projects can be leveraged to create libre systems. This talk will explore Open Source Hardware projects relevant to Linux, including boards like BeagleBone, Olimex OLinuXino, the Reform laptop and more. I will also talk about the importance of the open RISC-V instruction set and free software FPGA toolchains. I will explain how myself and others at Hackaday Supercon teamed up to get Linux running on RISC-V core in the ECP5 FPGA badge. I will explain what LiteX is and how it enabled us to quickly build a SoC capable of running Linux. Finally, I will explore the landscape of open source chip design projects and the Linux-capable RISC-V silicon chips on horizon for 2020.

Linux on RISC-VDrew Fustini

This document summarizes Drew Fustini's presentation about Linux on RISC-V. The key points are: 1) RISC-V is an open instruction set architecture that can be used as an alternative to proprietary ISAs like ARM and x86. It allows anyone to freely develop CPUs, SoCs and other hardware. 2) Several companies now offer RISC-V chips that run Linux, such as SiFive's HiFive Unleashed board. Open source projects are also bringing up Linux on chips like the Kendryte K210. 3) Open source FPGA tools like IceStorm, Trellis, X-Ray and SymbiFlow have made FPG

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Title: How to run Linux on RISC-V (with open hardware and open source FPGA tools) Abstract: Want to run Linux with RISC-V on Open Source Hardware? This talk will explore the current options including how open source FPGA tools can be leveraged to build open Linux-capable systems. I will explain how myself and others at Hackaday Supercon teamed up to get Linux running on RISC-V core in the ECP5 FPGA badge using only open source tools thanks to Project Trellis, yosys and nextpnr. I will explain what migen and LiteX are, and how it enabled us to quickly build a System-on-Chip (SoC) capable of running Linux on VexRiscv. In conclusion, I will explore the landscape of open source chip designprojects and the Linux-capable RISC-V silicon chips on horizon for 2020, and talk about my desire to collaborate on an affordable (<$100?) OSHW Linux RISC-V board.

Linux on RISC-VDrew Fustini

This document discusses Linux running on open source hardware using RISC-V processors and FPGAs. RISC-V is an open instruction set that provides an alternative to proprietary architectures like ARM. Projects are working to run Linux on low-cost RISC-V chips from SiFive and Kendryte. FPGAs can also run a Linux-capable RISC-V soft core called VexRiscv using open source tools. Several open source boards have been developed for the Lattice ECP5 FPGA featuring RISC-V support.

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From Make 'n Tell at xHain hackerspace in Berlin, I introduce the open RISC-V instruction set architecture (ISA) and explain how it is enabling a new generation of open source chip design. I will also discuss the importance of free software FPGA tools. I will explain how myself and others at Hackaday Supercon teamed up to get Linux running on RISC-V core in the ECP5 FPGA badge. I will explain what LiteX is and how it enabled us to quickly build a System-on-Chip (SoC) capable of running Linux. I finish by talking about how Fomu is a great FPGA board to get started with!

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Berlin Embedded Linux meetup: How to Linux on RISC-V... with open hardware and open source FPGA tools. I will introduce the open RISC-V instruction set architecture (ISA) and explain how it is enabling a new generation of open source chip design. I will also discuss the important of free software FPGA tools like yosys for synthesis, and nextpnr for place and route, and how SymbiFlow is leveraging bitstream documentation from Project IceStrom (iCE40), Project Trellis (ECP5), and Project X-Ray (Xilinix). I will explain how myself and others at Hackaday Supercon teamed up to get Linux running on RISC-V core in the ECP5 FPGA badge. I will explain what LiteX is and how it enabled us to quickly build a System-on-Chip (SoC) capable of running Linux. In conclusion, I will explore the landscape of open source chip design projects and the Linux-capable RISC-V silicon chips on horizon for 2020.

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Want to run Linux with RISC-V on Open Source Hardware? This talk will explore the current options including how open source FPGA tools can be leveraged to build open Linux-capable systems. I will introduce the open RISC-V instruction set architecture (ISA) and explain how it is enabling a new generation of open source chip design. I will also discuss the important of free software FPGA tools like yosys for synthesis, and nextpnr for place and route, and how SymbiFlow is leveraging bitstream documentation from Project IceStrom (iCE40), Project Trellis (ECP5), and Project X-Ray (Xilinix). I will explain how myself and others at Hackaday Supercon teamed up to get Linux running on RISC-V core in the ECP5 FPGA badge. I will explain what LiteX is and how it enabled us to quickly build a System-on-Chip (SoC) capable of running Linux. In conclusion, I will explore the landscape of open source chip design projects and the Linux-capable RISC-V silicon chips on horizon for 2020.

FPGA Badge Hack: Linux on RISC-VDrew Fustini

This document summarizes Drew Fustini's talk on running Linux on an FPGA badge using RISC-V and open source tools. It discusses how a team used LiteX and VexRiscv to build a SoC with a RISC-V CPU on the Hackaday Supercon badge FPGA that could boot Linux from an external SDRAM cartridge added to the badge. It also promotes open source FPGA tools like Project Trellis, LiteX, and boards like the Orange Crab and ULX3S for enabling open hardware development.

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Want to run Linux on open hardware? This talk will explore Open Source Hardware projects capable of that task, and explore how RISC-V and free software FPGA projects can be leveraged to create libre systems. Presented at the 36th Chaos Communication Congress (36c3) in Leipzig, Germany: https://fahrplan.events.ccc.de/congress/2019/Fahrplan/events/10549.html Video: https://media.ccc.de/v/36c3-10549-linux_on_open_source_hardware_with_open_source_chip_design YouTube: https://www.youtube.com/watch?v=mnOBTD9dgsg

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OSH Park is a community PCB ordering service that offers high quality, lead free boards manufactured in the USA for inexpensive prices due to shared panel costs. Customers can directly upload Autodesk EAGLE .brd files to OSH Park's website for ordering. It is recommended that customers run design rule checks on their files using OSH Park's Eagle Design Rules files prior to uploading to check for any issues.

BeagleBone Blue at Maker Faire 2017Drew Fustini

The document introduces the BeagleBone Blue, a new single-board computer that combines the capabilities of the BeagleBone Black Wireless and Robotics Cape. It evolves from previous BeagleBone models with ARM processors and is designed for industrial applications. Key features include WiFi/Bluetooth connectivity, on-board microcontrollers, and interfaces integrated onto a single board to simplify building robotics and IoT projects.

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My Open Source Hardware and Libre Silicon talk for Penguicon 2017. Open Source Hardware (OSHW) designs are made publicly available so that anyone can study, modify, distribute, make or sell designs or hardware based on that design. This talk will explore the shared values with Open Source software and the specifics of publishing a hardware project under an Open Source license. It will include examples of Linux running on OSHW with projects like BeagleBone, CHIP, MinnowBoard and more. The role of the Open Source Hardware Association and annual Open Hardware Summit will also be discussed, along with important OSHW projects for scientific researchers. There are exciting new developments within the last year for OSHW at the chip level. Projects like lowRISC, J-Core, OnChip and SiFive are working to produce true Open Source silicon processors. The FOSSi Foundation and LibreCores are helping to organize and promote this exciting new ecosystem.

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1. Espurino JavaScript for Microcontrollers ● Presenter: Drew Fustini ([email protected] / @pdp7) ● Website: http://www.espruino.com/ ● Kickstarter: https://www.kickstarter.com/projects/gfw/espruino-javascript-for-thing ● Videos: https://www.youtube.com/playlist?list=PLa1tazUyp-oOELRUt6tSuZIo

5. Why JavaScript? ● Doesn't need compiling ● Can be modified and added to while running ● Has good support for Strings, Objects, Maps and Arrays ● Has similar syntax to common languages like C, C++ (Arduino) and Java ● Can easily be event-based ● Is widely used, easy to learn and flexible ● JavaScript is the obvious (and possibly the only) language that does all this. Almost every website on the internet depends on it, and many websites such as Codeacademy provide free tutorials and lessons. Millions of people use it every day. ● We've tried to keep the API similar to Arduino's though - so if you've done any Arduino programming you should feel right at home. Even if you haven't, it means that a lot of what you learn with Espruino will be transferrable to other platforms.

6. Espruino board

7. Tech specs ● STM32 32-bit 72MHz ARM Cortex M3 CPU ● 256KB of Flash memory, 48KB of RAM ● Micro USB connector ● Input Voltage Range of 3.6v to 15v ● Battery connector (JST 2 Pin) ● Built-in SD card connector ● Red, Green and Blue LEDs ● Pads to allow HC-05 Bluetooth modules to be added ● 44 GPIO Pins, which can handle: 26 PWM Pins, 16 ADC Pins, 3 USARTs, 2 SPI, 2 I2C and 2 DACs ● Prototype area which can be used in many different configurations, for example: Servo Headers, Up to 14x 500mA outputs, 2x .NET Gadgeteer connectors, or NRF24L01+ wireless transceiver modules ● WiFi Support with the TI CC3000 WiFi module (not included)

8. Price: $40 from Seeed http://www.seeedstudio.com/depot/Espruino-board-

9. Option A) Connect via serial over USB Option B) Web IDE (Chrome browser app)

10. Quick Start ● http://www.espruino.com/Quick+Start ● digitalWrite(LED1,1) ● digitalWrite(LED1,0) ● function toggle() { on = !on; digitalWrite(LED1, on); } ● toggle() ● var interval = setInterval(toggle, 500) ● edit(toggle) ● function toggle() { on = !on; digitalWrite(LED1, on); digitalWrite(LED2, !on); } ● changeInterval(interval, 200); ● clearInterval(interval); ● rest() OR save()

11. Control string of LEDs http://www.espruino.com/Individually+Addressable+LEDs Video: https://www.youtube.com/watch?v=hanahdauDiE&index=3&list=PLa1tazU

12. Another Javascript board: Tessel ● http://makezine.com/magazine/first-look-javascript-micro-controllers-for- ● “The Tessel from technical.io […] is aimed on high end of the gap between the Arduino and the Raspberry Pi, squarely at Internet-connected applications targeting physical devices, and has WiFi built-in. That means not only that the board is always online, allowing it to be used as both as a server and a client, but you have the ability to remotely deploy your code onto the board via the network.”

13. Micro Python ● https://www.kickstarter.com/projects/214379695/micro-python-python ● http://www.micropython.org/ ● “lean and fast implementation of the Python 3 programming language that is optimised to run on a microcontroller. The Micro Python board is a small electronic circuit board that runs the Micro Python language”

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