Python: Ultrasonic Sensor Info alone

BrickPi
1

I have this code:

# Yannick Gloster
# December 12, 2013
# Made for the La Colina Science Fair 2013
#
# This code is a code to go through a simple maze

import BrickPi

BrickPiSetup()

BrickPi.MotorEnable[PORT_A] = 1 
BrickPi.MotorEnable[PORT_B] = 1 
BrickPi.MotorEnable[PORT_C] = 1 
BrickPi.SensorType[PORT_1] = TYPE_SENSOR_ULTRASONIC_CONT 

BrickPiSetupSensors()
while True
	result = BrickPiUpdateValues()
	print "Moving Foward"
	BrickPi.MotorSpeed[PORT_B] = 100	
	BrickPi.MotorSpeed[PORT_C] = 100
	BrickPiUpdateValues()
	if result < 21 :
		print "Turning"
		BrickPi.MotorSpeed[PORT_B] = 0
		BrickPi.MotorSpeed[PORT_C] = 0 
		BrickPi.MotorSpeed[PORT_A] = 50	
		BrickPi.MotorSpeed[PORT_B] = 200
		BrickPi.MotorSpeed[PORT_C] = -200
		time.sleep(1)
		BrickPi.MotorSpeed[PORT_A] = 0
		BrickPiUpdateValues()

And I can’t figure out how to get the BrickPiUdateValues just for the Ultrasonic Sensor

2

Ostrich, if you’re using the ultrasonic sensor, is it possible to try running that example code? I’m not sure if I understand what’s not working with the code or the BrickPi here.

3

Nm, After getting help at my local makerspace, We got it worked out!

It was just a coding error.
I think you guys should create documentation on coding of just the brickpi because it can be confusing
.

# Yannick Gloster
# December 15, 2013
# Made for the La Colina Science Fair 2013
#
# This code is a code to go through a simple maze

import BrickPi

BrickPiSetup()

BrickPi.MotorEnable[PORT_A] = 1 
BrickPi.MotorEnable[PORT_B] = 1 
BrickPi.MotorEnable[PORT_C] = 1 
BrickPi.SensorType[PORT_1] = TYPE_SENSOR_ULTRASONIC_CONT 

BrickPiSetupSensors()
while True
	print "Moving Foward"
	BrickPi.MotorSpeed[PORT_B] = 100	
	BrickPi.MotorSpeed[PORT_C] = 100
	BrickPiUpdateValues()
	if BrickPi.Sensor[PORT_1] < 21 :
		print "Turning"
		BrickPi.MotorSpeed[PORT_B] = 200
		BrickPi.MotorSpeed[PORT_C] = 200 
		BrickPi.MotorSpeed[PORT_A] = 50
4

Hey Ostrich, glad we got this figured out. sorry if the coding was confusing.

Can you elaborate a little? We can definitely take a shot at making it easier if you give us an idea. We thought that well commented examples would be a good start, but we’re happy to put more out there if you give us an idea.

5

Well when I’m programing my BrickPi, It would be nice to have like a pdf file that could be printed out saying that
BrickPi.MotorSpeed[Port_A] = Variable
Sets the speed of motor on port A.

The comments were really useful but a coding manual would be even better.

It would be something like a dummy’s guide to the brickpi (except not under that name because of copyright!)