Raspberry pi a la cfml
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1) The document discusses running ColdFusion on a Raspberry Pi single board computer. It provides details on setting up the Pi with Raspbian Linux, Oracle Java, and the CommandBox CFML engine. 2) Examples are given of running simple CFML files and scripts to output the current date/time using CommandBox. Additional software like ContentBox is installed to create a basic website. 3) The document explores using the Pi's GPIO pins to blink an LED and discusses possibilities for creating an 8x8 LED matrix display with ColdFusion code. Shift registers are mentioned as a way to control more outputs with fewer pins.
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![#!/bin/sh
# Get current system memory max and usage, in that order
mem_system=`free -m | grep Mem: | gawk '{print $2,$3}'`
# Start by getting the pid of the largest java process
java_pid=`top -b -n 1|awk '{if ($1~/[0-9]+/) {if ($5~/m/)
{$5=int($5*1024*1024)};print}}'|sort -k5rn,5 | grep java
| head -n1 | gawk '{print $1}'`
# Get the actual heap usage
mem_heap=`jstat -gc $java_pid | tail -n 1 | gawk '{print
($1+$2+$5+$7+$9)/1000,($3+$4+$6+$8+$10)/1000}'`
Adding Memory Usage](https://image.slidesharecdn.com/w7lke6gtqvklkgvclyjk-signature-e847456c6a6f52f4d0f0f7669a8f77f77a8ca5cc3daa63de0a00591556073525-poli-150518152323-lva1-app6892/85/Raspberry-pi-a-la-cfml-31-320.jpg)
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- 1. Raspberry Pi A La CFML Tasty, tasty CFML on a Pi Brad Wood @bdw429s pi.bradwood.com
- 2. ● ColdFusion Architect (12 years) ● Geek ● Android Lover ● Blogger (codersrevolution.com) ● ColdBox Platform Evangelist ● Musician ● Shade-Tree Mechanic ● Husband (12 years) ● Dad (3 beautiful girls) The Weird Dude With The Mic
- 3. What Is It?
- 4. What Is It?
- 5. Arduino Haven’t I seen this before? Raspberry Pi
- 6. ● $35 $25 ● 1 GB Ram ● 900 MHz Quadcore ARM CPU (overclockable) ● HDMI ● 4x USB ● Micro USB power ● Audio Jack ● Camera Interface ● Network ● GPIO ● Micro SD What Is It?
- 7. Fits in the palm of your hand. What Is It?
- 8. Well, almost... What Is It?
- 9. ● 2A power adapter ● USB Keyboard ● USB Mouse ● MicroSD card ● An operating system ● HDMI display ● Wifi or Ethernet hookup ● LED-adorned hat (optional) You also want/need…
- 10. It Does Cool Stuff!
- 13. Make a cool case Like What?
- 15. Program in Python (Scratch) Like What?
- 17. Robot Like What?
- 18. Make a 4-RPI Cluster Like What?
- 19. Make a 40-RPI Cluster Like What?
- 20. Make a 64-RPI Cluster Like What?
- 21. And you can run CFML Like What?
- 22. ● NOOBS ● Raspbian Linux (Debian) ○ Gnome Desktop (Pi Store) ○ Bash (apt-get) ● Oracle Java 1.8 (ARM) ● SSH Environment
- 23. ● PuTTY ● IP Address?? (Router, Nmap) ● CommandBox 2.0.0 beta ○ REPL ○ ForgeBox ○ Embedded Server Tools
- 24. /etc/apt/sources.list.d/box.list $> apt-get install commandbox /usr/bin/box $> box version Install CommandBox
- 26. myScript #! /usr/bin/env box <cfoutput>#now()#</cfoutput> $> chmod a+x myScript $> ./myScript Run CFML!
- 27. $> box CommandBox> install contentbox CommandBox> start --rewritesEnabled In-memory H2 DB Install ContentBox
- 29. #!/bin/sh # Get current CPU usage (10-second average, actually) top -bn 2 -d 10 | grep '^%Cpu' | tail -n 1 | gawk '{print $2+$4+$6}' >> ~/stats.txt <div style="float:right;"> #cb.widget("cpu-load")# </div> Adding CPU Load
- 30. Adding CPU Load “Flot” JS graphing lib
- 31. #!/bin/sh # Get current system memory max and usage, in that order mem_system=`free -m | grep Mem: | gawk '{print $2,$3}'` # Start by getting the pid of the largest java process java_pid=`top -b -n 1|awk '{if ($1~/[0-9]+/) {if ($5~/m/) {$5=int($5*1024*1024)};print}}'|sort -k5rn,5 | grep java | head -n1 | gawk '{print $1}'` # Get the actual heap usage mem_heap=`jstat -gc $java_pid | tail -n 1 | gawk '{print ($1+$2+$5+$7+$9)/1000,($3+$4+$6+$8+$10)/1000}'` Adding Memory Usage
- 33. Rate Limiter installed Posted to Reddit!
- 34. Performance test parameters ● No overclocking ● Bumped heap size to 768 MB ● Simple page with #now()# output ● Use CLI load tool call “Siege” ● Started with 1 thread and increased to 100 threads How fast does this baby go?
- 35. #!/bin/bash url="http://192.168.1.xxx/bench/" reqs=5000 NUMS="1 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100" for NUM in $NUMS do RPS=`siege -r $((reqs/NUM)) -c $NUM "$url" 2>&1 | grep "Transaction rate:" | awk '{print $3}'` echo -e "$NUMt$RPS" done How fast does this baby go?
- 36. How fast does this baby go? 1000 request per second!
- 37. What’s Next?
- 38. GPIO (General Purpose Input Output) ● 40 pins of wonderment ○ 8 Ground pins ○ 2 +3.3v pins (50 mA max) ○ 2 +5v pins (direct current from power supply ) ○ 28 digital pins 3.3v “high” (50 mA max) ● Three different naming schemes ○ Broadcom (BCM) chip numbers ○ Physical header position ○ Wiring Pi Numbers
- 39. GPIO (General Purpose Input Output)
- 40. GPIO (General Purpose Input Output) ● Cobbler (breakout) board ● Solderless Breadboard ● Red LED ● 330 Ohm resistor ● Hook in series between digital pin and ground
- 41. Pi4J ● Java-based library for interacting with GPIO pins ● Wraps “native” JNI calls to C library ● Easy to use from CFML! Yum!!
- 42. Pi4J $> curl -s get.pi4j.com | sudo bash $> cp /opt/pi4j/lib/pi4j-core.jar ~/.CommandBox/lib/ $> cp /opt/pi4j/lib/pi4j-device.jar ~/.CommandBox/lib/ $> cp /opt/pi4j/lib/pi4j-service.jar ~/.CommandBox/lib/ $> cp /opt/pi4j/lib/pi4j-gpio-extension.jar ~/.CommandBox/lib/
- 43. CommandBox REPL + Pi4J = Blinky Blinky LED GPIO = createObject( 'java', 'com.pi4j.io.gpio.GpioFactory').getInstance() pinState = createObject( 'java', 'com.pi4j.io.gpio.PinState') Raspipin = createObject( 'java', 'com.pi4j.io.gpio.RaspiPin') LED = GPIO.provisionDigitalOutputPin( RaspiPin.GPIO_01, "MyLED", PinState.HIGH)
- 44. CommandBox REPL + Pi4J = Blinky Blinky LED // Have you tried turning it // off and back on again? LED.low() LED.high() // Toggle the current state LED.toggle() // On and back off once LED.pulse( 2000 )
- 45. The (LED) Matrix has you 64 LEDs (8x8)
- 46. The (LED) Matrix has you Only 16 pins!
- 47. The (LED) Matrix has you
- 48. The (LED) Matrix has you --Multiplexing-- Only one column can be lit at a time.
- 49. The (LED) Matrix has you Inline 330 Ohm resistor on each row Each column switched to ground via NPN transistor
- 50. The (LED) Matrix has you CFML Redraw each column > 60 times a second
- 51. The (LED) Matrix has you
- 52. Shift Your Focus Shift Register
- 53. Shift Your Focus SIPO -- Serial In, Parallel Out
- 54. Shift Your Focus 1 0 1 0 1 0 1 0 Bit banging Allows transfer of large amount of data over a few wires in “chunks”
- 55. Shift Your Focus 5 input wires drives 16 output Data Clock Latch 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 5V GND
- 56. Shift Your Focus
- 57. Design In Flux
- 58. Design In Flux
- 59. Wired To The Brim
- 60. Wired To The Brim
- 63. Is that bacon I smell?
- 64. Is that bacon I smell?
- 65. What’s Next? ● Interactive projects (control from web) ● Clustered Pis (CFML, Couchbase, etc) ● Home Automation ● CFGPIO library ● What will you build?