https://github.com/glurp/ruby-onion-omega2
Usefull tools for using ruby (MRI) on Omega2+
https://github.com/glurp/ruby-onion-omega2
embedded omega2 onion ruby
Last synced: about 1 month ago
JSON representation
Usefull tools for using ruby (MRI) on Omega2+
- Host: GitHub
- URL: https://github.com/glurp/ruby-onion-omega2
- Owner: glurp
- License: other
- Created: 2017-08-22T14:52:25.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2018-01-24T15:21:46.000Z (over 7 years ago)
- Last Synced: 2025-03-16T16:03:44.222Z (about 1 month ago)
- Topics: embedded, omega2, onion, ruby
- Language: Ruby
- Size: 21.5 KB
- Stars: 6
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
Awesome Lists containing this project
README
Presentation
============
Discovered Omega2+, OpenWrt with 128MB for 10€ , I try it with ruby Lang.
The concurrents seems to be :
* Linkit smart : very near Onion product ( 12$ ), with Atmel chip for Arduino-compatibility
* Olimex RT5350 : 32MB RAM, with 5 Ethernets ports ( 15$ € )
* Arduino yun : more expensive ( 50$ ) 1 Ethernet, 64MB RAM
* RAK633 : 64MB RAM, 5 Ethernets ports, MT7628 , 10$ (? aliexpress)
* Banana PI RT1 : 5 Ethernets ports,512MB RAM, more more expensive (70$ ?)
Developer Plan
==============
Previsions :
------------
* V1 : develop this material without C librairie : use sysfs and some Onion exec (```fast-gpio``` ...)
* V2 : link to onionlib shared library via FFI, provide same API as V1, but faster
* V3 : make a onion-mruby executable with all V2 io included :-)
Currently: V1 done, V2 is started (OLED)
TODO on V1 :
------------
* [x] develop a gpio library for digital input/output access
* [x] develop a pwm library using fast-gpio
* [x] OLED access ion I2C: seem ok with SSD1308 based Oled (text write, reset...)
* [x] OLED create SSD130x file format from ppm file, send it to oled display
* [ ] gem ! ( actually, requiring ```onion-gpio.rb``` is sufficient)
TODO on V2 :
------------
* [ ] develop a gpio library for digital input/output access
* [ ] develop a pwm library using fast-gpio
* [x] OLED (text write, reset...)
* [ ] gem !
Feel free to collaborate to the project !
Ruby use on Omega2+
====================
no difficulties :
```
> opkg intall ruby
> opkg install rubygems
```
This represent 5MB on flash memory, at ```/usr/lib/ruby```.
```
~# du -s /usr/lib/ruby/*
5078 /usr/lib/ruby/2.4
156 /usr/lib/ruby/gems
5 /usr/lib/ruby/ruby2.4-bin
0 /usr/lib/ruby/site_ruby
0 /usr/lib/ruby/vendor_ruby
```
onion-gpio.rb
=============
Use sysfs for access to digital gpio (duration: 3ms for writing one output line).
Use programs like fast-gpio, oled-exp an i2c-get for other access.
Example
=======
```ruby
# put a LED pn port 3,
require_relative 'ionion-gpio.rb'
gpio=OnionGpio.new( 3 , false)
gpio.setOutputDirection()
100.times { |i| gpio.setValue(i%2) ; sleep 0.1}
gpio.pwm( 1000, 50) # 1 KHz, 50% state on
gpio.pwm_reset
# put a OLED on I2C SDA/SCL, : work with seeedStudio OLED grovve
oled=OnionOled.new(0,0)
oled.write_at(0,0,"Hello world...")
```
Oled clock :
```ruby
########################################################################
# oled : test oled
########################################################################
require_relative "onion-gpio"
def get_out(cmd,filter,nofield)
`#{cmd}`.each_line {|line|
next unless line=~ filter
data=line.chomp.split(/\s+/)[nofield]
ret= block_given? ? yield(data) : data
return(ret) if ret
}
"?"
end
def getMem() get_out("free",/^Mem:/,3) {|m| m.to_i/1024} end
def getFlash() get_out("df -h",/^overlayfs:/,3) end
oled=OnionOled.new(0,0)
oled.reset
oled.pos(0,0,ARGV.join(' '))
loop {
oled.pos(10,5,Time.now.to_s.split(' ')[1])
oled.pos(0,0, "FreeMem: #{getMem()} MB")
oled.pos(0,1,"FreeFlash: #{getFlash()}")
sleep 1
}
```
