Hello Again Sir,
Mr. Dennis...Seth here again. I also tried PWM as an output to the L298
Board. I listed some software below in case you wanted to view it. Oh and I
tried w/ the while loop hashed out (#) and w/ it as it is now. Well, here
it is:
#!/usr/bin/python
import Adafruit_BBIO.PWM as PWM
#import time
MotorOne = "P9_21"
MotorTwo = "P9_22"
PWM.start(MotorOne, 50, 20, 0)
PWM.start(MotorOne, 50, 20, 0)
while True:
taco = (MotorOne, 1)
bien = (MotorTwo, 1)
print "I love Lucy!"
#for i in range(1, 30):
#taco = (MotorOne, 30)
#bien = (MotorTwo, 30)
#print "I think Lucy is a cheat!"
#for i in range(1, 54):
#taco = (MotorOne, 30, -1)
#bien = (MotorTwo, 30, -1)
#print "She probably is a cheat!"
PWM.stop(MotorOne)
PWM.stop(MotorTwo)
PWM.cleanup
So, you see. I cannot make PWM work or GPIO work on this board. I know it
is me. It cannot be a faulty board. I push the power button after applying
power, 12v 1.3Ah, and the LED stays lit.
Seth
P.S. I understood what you typed in your last e-mail post in this forum on
this subject. I was not expecting any certain outcome. I was testing
software w/ this motor driver to see if things would just make the motors
turn. It is that simple. Now, if the motors did turn and the recorded
effect was pleasing, I would not have to change anything. But, if the
motors turned incorrectly for me, I would then investigate further what I
could do w/ the software to change this fact.
On Thursday, May 3, 2018 at 10:15:12 AM UTC-5, Dennis Lee Bieber wrote:
>
> On Wed, 2 May 2018 21:51:08 -0700 (PDT), Mala Dies
> <[email protected] <javascript:>> declaimed the following:
>
> >import Adafruit_BBIO.GPIO as GPIO
> >import time
> >
> >GPIO.setup("P9_21", GPIO.OUT)
> >GPIO.setup("P9_22", GPIO.OUT)
> >GPIO.setup("P9_12", GPIO.OUT)
> >GPIO.setup("P9_15", GPIO.OUT)
> >
> >m1a = GPIO.output("P9_21", GPIO.HIGH)
> >m1a = GPIO.output("P9_22", GPIO.HIGH)
>
> Meaningless assignments... First, the return from the second line
> replaces the value returned by the first line, since you used the same
> name
> for the return.
>
> On the other hand -- based upon the documentation for the library,
> GPIO.output() doesn't return anything so you are just replacing None with
> None.
>
> >m1b = GPIO.output("P9_12", GPIO.HIGH)
> >m1b = GPIO.output("P9_15", GPIO.HIGH)
> >
> Ditto
>
> You've set all control pins high -- which should, for any motor
> controller I can envision, mean the motors are not powered (BTW -- you did
> wire the ENABLE A and B pins to something, didn't you?
>
> >while (True):
> >
> > try:
> > for motor in range (0, 101, 1): #starts at 0, steps up to
> >101 in 1 steps
> > m1a = ("P9_21")
>
> Here you assign a string to the name, but you never do anything
> with
> the string. So... again a meaningless assignment.
>
> > time.sleep(3)
> > print(motor)
>
> And you never do anything with the motor pin itself, so nothing
> changes.
>
> This loop condenses down to just printing integers from 0..100
> with a 3
> second pause between them, and it does all of them before moving to the
> next loop, which does the very same thing.
>
> > for motor in range (0, 101, 1):
> > m1a = ("P9_22")
> > time.sleep(3)
> > print(motor)
> > for motor in range (100, -1, -1):
> > m1b = ("P9_12")
> > time.sleep(3)
> > print(motor)
> > for motor in range (100, -1, -1):
> > m1b = ("P9_15")
> > time.sleep(3)
> > print(motor)
> >
>
> What behavior are you expecting since the above four loops are
> coded to
> run on after the other -- nothing is being done in parallel even if you
> were changing motor pin settings.
>
> > except(KeyboardInterrupt):
> >
> > #And final cleanup
> > print "You have just ended your camp trip!"
> > GPIO.cleanup()
> > quit()
>
> Your "final cleanup" will only be performed IF you hit <ctrl-c>
> BEFORE
> the loops run out. Otherwise, you just fall off the end of the program
> with
> no cleanup performed
>
>
> My suggestion -- since you are using Python...
>
> Open a shell and run Python in interactive mode, and then enter
> GPIO
> statements one at a time setting pins to HIGH and LOW, in various
> combinations, to see what it takes to activate the motors.
>
>
> And, just for a giggle (untested as I don't have your hardware
> present)
>
> -=-=-=-=-
> """
> Pseudo-code for fictitious robot-car with two driving wheels, using
> brushed DC motors; I do not have the driver board or motors so this
> is just text of what I believe would be needed
>
> NOTE: THIS IS PYTHON 2.7 SYNTAX; modify as needed for 3.x
> """
>
> import time
> import Adafruit_BBIO.GPIO as GPIO
>
> class BrushedDC(object):
> def __init__(self, p1, p2):
> self.p1 = p1
> self.p2 = p2
> GPIO.setup(self.p1, GPIO.OUT)
> GPIO.setup(self.p2, GPIO.OUT)
> self.stop()
> def stop(self):
> GPIO.output(self.p1, GPIO.LOW)
> GPIO.output(self.p2, GPIO.LOW)
> def forward(self):
> self.stop() #safety to avoid shock of reversals
> GPIO.output(self.p1, GPIO.HIGH)
> GPIO.output(self.p2, GPIO.LOW)
> def reverse(self):
> self.stop()
> GPIO.output(self.p1, GPIO.LOW)
> GPIO.output(self.p2, GPIO.HIGH)
>
> class Car(object):
> def __init__(self, leftMotor, rightMotor):
> self.leftMotor = leftMotor
> self.rightMotor = rightMotor
> self.stop()
> def stop(self, wait=0):
> self.leftMotor.stop()
> self.rightMotor.stop()
> time.sleep(wait)
> def forward(self, wait=0):
> self.leftMotor.forward()
> self.rightMotor.forward()
> time.sleep(wait)
> def reverse(self, wait=0):
> self.leftMotor.reverse()
> self.rightMotor.reverse()
> time.sleep(wait)
> def leftTurnForward(self, wait=0):
> self.leftMotor.stop()
> self.rightMotor.forward()
> time.sleep(wait)
> def rightTurnForward(self, wait=0):
> self.leftMotor.forward()
> self.rightMotor.stop()
> time.sleep(wait)
> def leftTurnReverse(self, wait=0):
> self.leftMotor.stop()
> self.rightMotor.reverse()
> time.sleep(wait)
> def rightTurnReverse(self, wait=0):
> self.leftMotor.reverse()
> self.rightMotor.stop()
> time.sleep(wait)
> def leftPivot(self, wait=0):
> self.leftMotor.reverse()
> self.rightMotor.forward()
> time.sleep(wait)
> def rightPivot(self, wait=0):
> self.leftMotor.forward()
> self.rightMotor.reverse()
> time.sleep(wait)
>
>
> myCar = Car(leftMotor=BrushedDC(p1="P9_21", p2="P9_22"),
> rightMotor=BrushedDC(p1="P9_12", p2="P9_15"))
>
> myCar.forward(10)
> myCar.leftPivot(3)
> myCar.forward(5)
> myCar.rightTurnReverse(3)
> myCar.reverse(10)
> myCar.stop(10)
> myCar.rightPivot(30)
> myCar.forward(5)
> myCar.rightTurnForward(15)
> myCar.stop()
>
> GPIO.cleanup()
>
> -=-=-=-=-=-
>
>
>
> --
> Wulfraed Dennis Lee Bieber AF6VN
> [email protected] <javascript:>
> HTTP://wlfraed.home.netcom.com/
>
>
--
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