Difference between revisions of "Robot Club"
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Files for the programming tutorial: [[Media:nurobotics_tutorial.zip | nurobotics_tutorial.zip]] |
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== Halloween Tutorial 1== |
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We are using the [https://www.adafruit.com/product/3727 Itsy Bitsy M0 Express] from [https://www.adafruit.com/ Adafruit]. |
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[https://codewith.mu/ Mu ("Moo")] is a nice IDE used to edit the code and debug. |
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* First, plug the board in a open Mu. Load main.py from the CIRCUITPY drive. Open the serial monitor. |
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Download and install Arduino from [http://arduino.cc/en/Main/Software http://arduino.cc/en/Main/Software]. |
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* Second, go into REPL mode and communicate with the board. Practice entering (CTRL-c) and exiting (CTRL-D) REPL. |
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Run the program to see how it looks. Open an example from |
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* Third, make a local copy of main.py, in case you ever want to see the original examples again. |
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* Forth, replace the contents of main.py with: |
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''' |
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import board # pin definitions |
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import time # time functions |
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import touchio # capacitivectouch library |
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import pulseio # pwm library |
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import adafruit_dotstar # dotstar rgb led library |
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# One dotstar soldered on the board |
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File->Examples->01.Basics->Blink. |
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dot = adafruit_dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2) |
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# Built in red LED |
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All Arduino code has two main functions: setup() and loop(). In Blink, |
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led = pulseio.PWMOut(board.D13, frequency=5000, duty_cycle=0) |
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setup() makes pin 13 an output, and loop() makes an LED on pin 13 |
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led.duty_cycle = 0 # initially off |
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blink once per second. We'll go over it in more detail. Close the |
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program for now. |
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# Capacitive touch on A2 |
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touch = touchio.TouchIn(board.A2) |
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# Helper to give us a nice color swirl |
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We are programming a slightly different chip, so download the extra |
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def wheel(pos): |
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parts file from |
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# Input a value 0 to 255 to get a color value. |
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# The colours are a transition r - g - b - back to r. |
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if (pos < 0): |
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return [0, 0, 0] |
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if (pos > 255): |
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return [0, 0, 0] |
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if (pos < 85): |
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return [int(pos * 3), int(255 - (pos*3)), 0] |
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elif (pos < 170): |
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pos -= 85 |
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return [int(255 - pos*3), 0, int(pos*3)] |
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else: |
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pos -= 170 |
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return [0, int(pos*3), int(255 - pos*3)] |
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######################### MAIN LOOP ############################## |
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[https://github.com/damellis/attiny/ https://github.com/damellis/attiny/] (Download ZIP button). |
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i = 0 # a variable to keep track of time |
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while True: |
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time.sleep(.01) # wait 0.01 seconds. if this isn't here the code might run too fast |
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i = (i+1) % 256 # run from 0 to 255 |
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dot[0] = wheel(i & 255) # set the color of the dotstar, [red green blue] |
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led.duty_cycle = i*255 # duty_cycle can be 0 to 65535 |
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if i%100==0: # if i is divisible by 100 |
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# printing at this slow speed because sending too often chokes the computer |
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print("A2 touch: %d" % touch.raw_value, end="\n") # print the value of the cap touch sensor on pin A2 |
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''' |
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Unzip the folder, rename it "hardware" and add it to the folder |
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...documents/arduino/. |
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The RGB LEDs on the tutorial board use a special library called |
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"Neopixel." Download the Neopixel library from |
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https://github.com/adafruit/Adafruit_NeoPixel |
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Unzip the folder, rename it "Adafruit_NeoPixel", and add the folder to |
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...documents/library/ (library might not exist, so make it there) |
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Tasks: |
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Edit the tutorial example files to: |
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* Read the push button, turn the RGB LEDs on and off |
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* Read the push button, toggle the RGB LEDs on and off |
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* Read the push button, use Delay() to make a blinky pattern with the RGB LEDs |
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Revision as of 18:46, 3 October 2018
Halloween Tutorial 1
We are using the Itsy Bitsy M0 Express from Adafruit.
Mu ("Moo") is a nice IDE used to edit the code and debug.
- First, plug the board in a open Mu. Load main.py from the CIRCUITPY drive. Open the serial monitor.
- Second, go into REPL mode and communicate with the board. Practice entering (CTRL-c) and exiting (CTRL-D) REPL.
- Third, make a local copy of main.py, in case you ever want to see the original examples again.
- Forth, replace the contents of main.py with:
import board # pin definitions import time # time functions import touchio # capacitivectouch library import pulseio # pwm library import adafruit_dotstar # dotstar rgb led library
- One dotstar soldered on the board
dot = adafruit_dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
- Built in red LED
led = pulseio.PWMOut(board.D13, frequency=5000, duty_cycle=0) led.duty_cycle = 0 # initially off
- Capacitive touch on A2
touch = touchio.TouchIn(board.A2)
- Helper to give us a nice color swirl
def wheel(pos):
# Input a value 0 to 255 to get a color value.
# The colours are a transition r - g - b - back to r.
if (pos < 0):
return [0, 0, 0]
if (pos > 255):
return [0, 0, 0]
if (pos < 85):
return [int(pos * 3), int(255 - (pos*3)), 0]
elif (pos < 170):
pos -= 85
return [int(255 - pos*3), 0, int(pos*3)]
else:
pos -= 170
return [0, int(pos*3), int(255 - pos*3)]
- MAIN LOOP ##############################
i = 0 # a variable to keep track of time while True:
time.sleep(.01) # wait 0.01 seconds. if this isn't here the code might run too fast
i = (i+1) % 256 # run from 0 to 255
dot[0] = wheel(i & 255) # set the color of the dotstar, [red green blue]
led.duty_cycle = i*255 # duty_cycle can be 0 to 65535
if i%100==0: # if i is divisible by 100
# printing at this slow speed because sending too often chokes the computer
print("A2 touch: %d" % touch.raw_value, end="\n") # print the value of the cap touch sensor on pin A2
