I’m new here and I got my first MAestro 6 servo controller board yesterday. I want to solve a problem with an RC-remote, but I can’t get it to work…
I get an error in the script, but I don’t know why? Maybe someone can help me.
I want to solve a porbably easy task:
After dipping a switch on the remote, servo 0 should go to a given position slowly and back to its origin.
After that servo 1 should go even slower to a given position and back to it’s origin.
That’s all.
I want to be able to trigger this sequenze every time I push the switch. Thats all.
I already got a working sequenze by saving frames, but since I want to use the input port 2 as a trigger, I had to adapt the code and now I’m stuck.
Could somebody please look into it, what’s going wrong?
By the way:
Yes, i have the RC switch hooked up between the Maestro 6 and the receiver. The red led on the RC switch turns red when the switch is triggered on the RC transmitter, and ist blinking slowly when the switch is not triggered. So the hardware seems fine, but the error has to be somewhere in the code.
I’m getting error 0x0040, “Stack overflow/Underflow” at the end of frame_00…
What you are trying to do is certainly possible. However, the code you posted has some mistakes. For example, when the subroutine frame_00 is called in the loop, there are no position values on the stack for the servo commands to use. There is also no delay value given for the delay command in frame_00. I recommend reading The Maestro Scripting Language section of the Maestro’s user’s guide. In particular the “Using a button or switch to control servos” example in the Example Scripts section might be helpful.
Sorry, I don’t quite understand the stack issue, but my english is not too good either.
I worked with the example scripts, but I’m not sure what to do now? Can somebody point me on the errors in my script?
I know it’s not funny to help clueless people, but it’s all greek to me…
You could change some of the code from the example “Using a button or switch to control servos” to move the second servo. These changes should all occur in the main_loop and sub frame. I have posted a modified version of the example code that moves two servos through a sequence of positions after a button is pressed. This should be good starting point for you to look at.
[code]goto main_loop # Run the main loop when the script starts (see below).
This subroutine returns 1 if the button is pressed, 0 otherwise.
To convert the input value (0-1023) to a digital value (0 or 1) representing
the state of the button, we make a comparison to an arbitrary threshold (500).
This subroutine puts a logical value of 1 or a 0 on the stack, depending
on whether the button is pressed or not.
sub button
0 get_position 500 less_than
return
This subroutine uses the BUTTON subroutine above to wait for a button press,
including a small delay to eliminate noise or bounces on the input.
sub wait_for_button_press
wait_for_button_open_10ms
wait_for_button_closed_10ms
return
Wait for the button to be NOT pressed for at least 10 ms.
sub wait_for_button_open_10ms
get_ms # put the current time on the stack
begin
# reset the time on the stack if it is pressed
button
if
drop get_ms
else
get_ms over minus 10 greater_than
if drop return endif
endif
repeat
Wait for the button to be pressed for at least 10 ms.
sub wait_for_button_closed_10ms
get_ms
begin
# reset the time on the stack if it is not pressed
button
if
get_ms over minus 10 greater_than
if drop return endif
else
drop get_ms
endif
repeat
An example of how to use wait_for_button_press is shown below:
Uses WAIT_FOR_BUTTON_PRESS to allow a user to step through
Hello. I had trouble getting a switch to work a did my research on the forums and nothing worked. I made a change of code that worked and wanted to post it to help others. The problem was the 10ms in the wait for button to not be pressed. The following are the changes to the code:
goto main_loop # Run the main loop when the script starts (see below).
# This subroutine returns 1 if the button is pressed, 0 otherwise.
# To convert the input value (0-1023) to a digital value (0 or 1) representing
# the state of the button, we make a comparison to an arbitrary threshold (500).
# This subroutine puts a logical value of 1 or a 0 on the stack, depending
# on whether the button is pressed or not.
sub button
0 get_position 200 less_than
return
# This subroutine uses the BUTTON subroutine above to wait for a button press,
# including a small delay to eliminate noise or bounces on the input.
sub wait_for_button_press
wait_for_button_open_10ms
wait_for_button_closed_10ms
return
# Wait for the button to be NOT pressed for at least 10 ms.
sub wait_for_button_open_10ms
get_ms # put the current time on the stack
begin
# reset the time on the stack if it is pressed
button
if
drop get_ms
else
get_ms over minus 100 greater_than
if drop return endif
endif
repeat
# Wait for the button to be pressed for at least 10 ms.
sub wait_for_button_closed_10ms
get_ms
begin
# reset the time on the stack if it is not pressed
button
if
get_ms over minus 100 greater_than
if drop return endif
else
drop get_ms
endif
repeat
# An example of how to use wait_for_button_press is shown below:
# Uses WAIT_FOR_BUTTON_PRESS to allow a user to step through
# a sequence of positions on servo 1.
main_loop:
begin
wait_for_button_press
4000 4000 frame
500 delay
5000 5000 frame
500 delay
6000 6000 frame
500 delay
7000 7000 frame
500 delay
8000 8000 frame
repeat
sub frame
1 servo 2 servo
return
