my program!

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1

HELP! can somone (and i don’t mean me)
helpme with my program (once agan ) its for my 4wd rver

2

it’s not working

the program is supposed to make
the rover go forword until the bumbers
get hit and the left wheels won’t spin
i’m geussing it just a typing errer

delay var byte
rate var byte
count1 var byte
count2 var byte
delay=80
rate=40
startloop
   button p0,1,delay,rate,count1,0,right
   button p1,1,delay,rate,count2,0,left
goto startloop

right
  'code to rotate to the right
  pos var word
  servo p4,pos,50
  servo p5,pos,-50
goto startloop
left
  'code to rotate to the left
  pos1 var word
  servo p5,pos1,50
  servo p4,pos1,-50
goto startloop

so can somone please help me fix my program :question:

3

Ok. First of all, you don’t have anything in your startloop to cause the rover to move forward.
Second, the repeat value should be left at 20 I believe.
Third, I think the pos and pos1 definitions should be taken out and made global.

4

well, could you
copy my program and make the changes
because i’m not sure what you mean

5

You can try something like:

delay var byte
rate var byte
count1 var byte
count2 var byte

pos var word
pos1 var word

delay = 80
rate = 40

startloop
	servo p4,pos
	servo p5,pos1

	if(pos < 2350 && pos1 < 2350) then
		pos = pos + 50
		pos1 = pos1 + 50
	endif

	button p0,1,delay,rate,count1,0,right
	button p1,1,delay,rate,count2,0,left

	goto startloop

right
	'code to rotate to the right

	if(pos > -2350) then
		pos = pos - 50
	endif

	if(pos1 < 2350) then
		pos1 = pos1 + 50
	endif

	servo p4,pos
	servo p5,pos1

	goto startloop

left
	'code to rotate to the left


	if(pos < 2350) then
		pos = pos + 50
	endif

	if(pos1 > -2350) then
		pos1 = pos1 - 50
	endif


	servo p4,pos
	servo p5,pos1

	goto startloop

I have coded for the BasicAtom in months so it might be wrong. Please note, since your using servos your only limited to 90 or 180degrees of movement. Once the servo makes a full movement it will stop moving.

In the program above, the robot will move forward. If the left bumper is hit then the robot will rotate to the right. If right, then it will rotate to left. Use motors if you want the robot to move more than a few inches.

6

i am using continues rotation servo
though :astonished:

7

now when i tryed to program
it keeps saying errers detected
so that means that its not writen
right :cry:

8

Not sure how continues servos work… And it would be helpful to know what error you get :stuck_out_tongue: What rover do you have? Check the lynxmotion downloads section for example code for it.

9

i made my own rover from scratch
:unamused:

10

Pointer:
In most programming languages, when you declare a variable all the way at the top of a program, then it becomes acessable to the entire program.
When you start learning to code, it’s usually best to declare all variables up there.

You said that your compiler threw programming errors.
Most compilers will list those errors and point you to the line of code that they think those errors are made on.
Does your compiler do this?
If so, paste the list of errors in a post.

Off the top of my head…
You might need to change the name of your “startloop” to “Main”.
Some programming languages (C, for instance) actually require you to have “Main” as your first subroutine.

Also, it might be a good idea to give pos and pos1 a value before entering your first loop.

I’d need to see the error list to tell ya more.

11

OH, right.

Center the servos first and replace

pos var word
pos1 var word

with

pos var word
pos1 var word
pos = 0
pos1 = 0

nick. mbasic executes by line. There is no special name you need to give to the label :slight_smile:

12

When the IDE tells you that your program has an error, that message will be accompanied by a line number, letting you know where in your program the error lies. Take a look at that line, and the lines around it. Compare the structure and syntax of those lines to what is shown in the user’s guide and syntax manuals (downloadable from the BasicMicro website), and it’s usually easy to find what the problem is. Over time, you will find that you’re getting better at programming these things, making fewer errors, and you won’t be dependent on others to debug your programs for you.

One of the best things that I ever did in learning to program the Atom Pro was to get a hard copy of the syntax manual so I could have it open flat on the desk while I’m typing, and I didn’t have to wade through the PDF file in another window.

13

Yeah. What nick said.

As to the regular servos versus continuous rotation: They are functionally the same, but instead of the pulse width determining the position that the output rotates to, it determines the speed at which it rotates to either side of the pulse width that the servo sees as its “center”. Depending on how the servo has been converted, there may be an adjustment to adjust the “center”, or it may be fixed. How this “center” is adjusted (software or hardware) will depend on your particular servos and how they were converted to full rotation.