struggling to increase and decrease motor speed - Raspberry Pi Forums

hi guys need bit of getting code bellow working works kind of outputs data when run code cant increase , decrease speed want. please advise need change

forward 0 reverse 0 acceleration 0
forward 10 reverse 0 acceleration 10
forward 20 reverse 0 acceleration 20
forward 30 reverse 0 acceleration 30
forward 40 reverse 0 acceleration 40
forward 50 reverse 0 acceleration 50
forward 60 reverse 0 acceleration 60
forward 70 reverse 0 acceleration 70
forward 80 reverse 0 acceleration 80
forward 90 reverse 0 acceleration 90 speed @ peak
forward 90 reverse 0 acceleration 90
forward 90 reverse 0 acceleration 90
forward 90 reverse 0 acceleration 90
forward 90 reverse 0 acceleration 90
forward 90 reverse 0 acceleration 90-
forward 80 reverse 0 acceleration 80
forward 70 reverse 0 acceleration 70
forward 60 reverse 0 acceleration 60
forward 50 reverse 0 acceleration 50
forward 40 reverse 0 acceleration 40
forward 30 reverse 0 acceleration 30
forward 20 reverse 0 acceleration 20
forward 10 reverse 0 acceleration 10- code not change reversing till after
forward 0 reverse 0 acceleration 0
forward 0 reverse 10 acceleration -10 -starts @ max reverse , decrease speed (want other way)
forward 0 reverse 20 acceleration -20
forward 0 reverse 30 acceleration -30
forward 0 reverse 40 acceleration -40
forward 0 reverse 50 acceleration -50
forward 0 reverse 60 acceleration -60
forward 0 reverse 70 acceleration -70
forward 0 reverse 80 acceleration -80
forward 0 reverse 90 acceleration -90
forward 0 reverse 90 acceleration -90
forward 0 reverse 90 acceleration -90
forward 0 reverse 90 acceleration -90
forward 0 reverse 90 acceleration -90

code: select all

 import rpi.gpio io io.setmode(io.bcm) import sys, tty, termios, time import os  motorrightpin = 22 motorleftpin = 10 io.setup(motorleftpin, io.out) io.setup(motorrightpin, io.out)   motorfdpin = 24 motorrdpin = 23 io.setup(motorfdpin, io.out) io.setup(motorrdpin, io.out) motorpwm2 = io.pwm(24,100) motorpwm2 = io.pwm(23,100) motorpwm2.start(0) motorpwm2.changedutycycle(0)  # catch method can determine key has been pressed # user on keyboard. def getch():     fd = sys.stdin.fileno()     old_settings = termios.tcgetattr(fd)     try:         tty.setraw(sys.stdin.fileno())         ch = sys.stdin.read(1)     finally:         termios.tcsetattr(fd, termios.tcsadrain, old_settings)     return ch  # here define methods used determine # whether motor needs spin forward or backwards. # both pins match, motor not turn.  def reverse():     io.output(motorrdpin, true)     io.output(motorfdpin, false)     	 def forward():     io.output(motorrdpin, false)     io.output(motorfdpin, true)    	 	# stop motors def stop():     io.output(motorrdpin, false)     io.output(motorfdpin, false)      # set variables motor speed. motorfspeed = 0 motorrspeed = 0 maxspeed = 90 minspeed = 0 acceleration = 0 speedstep = 10         	# functions sets motor speed. def setmotorspeed(motorfspeed, motorrspeed,acceleration): 	if(acceleration > 0): 		reverse() 		if(acceleration > maxspeed): 			acceleration = maxspeed 		motorfspeed = acceleration 		#motorrspeed = acceleration 	elif(acceleration == 0): 		motorfspeed = acceleration 		motorrspeed = acceleration 		stop() 	elif(acceleration < (maxspeed * -1)): 		acceleration = (maxspeed * -1) 	else: 		forward() 		#motorfspeed = (acceleration * -1) 		motorrspeed = (acceleration * -1) 	 	motorfspeed, motorrspeed = check_motorpseed(motorfspeed, motorrspeed) 	 	return motorfspeed, motorrspeed, acceleration  	# function used left steering  def left(): 	io.output(motorrightpin, io.low)         io.output(motorleftpin, io.high)  	#this function used right steering def right(): 	io.output(motorrightpin, io.high)         io.output(motorleftpin, io.low)  def center(): 	io.output(motorrightpin, io.low) 	io.output(motorleftpin, io.low)  	 	# check motorspeed if correct , in max/min range def check_motorpseed(motorfspeed, motorrspeed): 	if (motorfspeed < minspeed): 		motorfspeed = minspeed  	if (motorfspeed > maxspeed): 		motorfspeed = maxspeed 			 	if (motorrspeed < minspeed): 		motorrspeed = minspeed  	if (motorrspeed > maxspeed): 		motorrspeed = maxspeed 			 	return motorfspeed, motorrspeed   	 # setting pwm pins false motors not move # until user presses first key io.output(motorrdpin, false) io.output(motorfdpin, false)   # instructions when user has interface print("w/s: direction") print("a/d: steering") print("q: stops motors") print("x: exit")  # infinite loop # loop not end until user presses # exit key 'x' or program crashes...  while true:     # keyboard character retrieval method. method save     # pressed key variable char 	char = getch() 	print "forward",motorfspeed, "reverse", motorrspeed, "acceleration", acceleration 	# car drive forward when "w" key pressed 	if(char == "w"): 		acceleration = acceleration + speedstep 		motorfspeed, motorrspeed, acceleration= setmotorspeed(motorfspeed, motorrspeed, acceleration) 		 		motorpwm2.changedutycycle(motorfspeed) 		 		     # car reverse when "s" key pressed 	if(char == "s"): 		acceleration = acceleration - speedstep 		motorfspeed, motorrspeed, acceleration = setmotorspeed(motorfspeed, motorrspeed, acceleration)	 			 		 		motorpwm2.changedutycycle(motorrspeed)      # stop motors 	if(char == "q"): 		motorfspeed = 0 		motorrspeed = 0 		stop()      # "d" key toggle steering right 	if(char == "d"):		 		right() 		stop() 		     # "a" key toggle steering left 	if(char == "a"): 		left() 		stop()  	# "e" key toggle steering center 	if(char == "e"): 		center() 		stop()  	# "x" key break loop , exit program 	if(char == "x"): 		print("program ended") 		break 	     # keyboard character variable char has set blank. need 	# set blank save next key pressed user 	char = ""  # program clean gpio settings , terminates io.cleanup()  # end 

your code bit confusing.

1) trying control 1 motor, or two?

2) control signals driver board expecting? (per motor)

each motor can independently control direction , speed via pwm.

2 wire control usually

dira + dirb

or

dir + pwm

3 wire control usually

en dira dirb

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