RC input

[bluejets]

Where would I find information on minus step values and how to implement??
Trying to use rc input to generate a 3.3 volt output from the neutral position of the throttle stick in both directions. i.e. zero to 3.3 forward and zero to 3.3 reverse.
I have the first bit (iI think) but need to find info on minus stepping.

 

[bluejets]

As the beginner just asked...how do you post code???

 

[MPep]

In the orange bar above, look for FAQ. At the bottom of that page is where the answers are!!

 

[bluejets]

In the orange bar above, look for FAQ. At the bottom of that page is where the answers are!!

looked and couldn't understand...tried a dozen ways but it will not work

 

[MartinM57]

Just type this exactly, but without the space characters after the [ and before the ]

[ code ]
high 1
[ /code ]

and you will end up with

high 1

 

[bluejets]

Thanks Martin,
With reference to the original question, I think I may have sorted it out for myself. Anyone welcome to take a look and comment. Thanks.....

Main:
	pulsin 4,1,b0					'read rc signal 
	sertxd("RC input value  ",#b0,13,10)		'output to serial monitor
	if b0>150 then forw				'forward speed
	if b0<150 then revse				

forw:
	b1=b0-150						'b1 is forward speed percentage
	b1=b1*132/100					'b1 set at 66% of max(3.3volts at 5 volt supply)
	pwmout 2,100,b1					'output this voltage and use at input to sound chip
	sertxd("forward percent is ",#b1,13,10)					
	goto main
revse:
	if b0<100 then goto main			'no signal
	b2=150-b0						'b2 is reverse speed percentage
	b2=b2*132/100					'b2 set at 66% of max(3.3volts at 5volt supply)
	pwmout 2,100,b2					'output this voltage and use as input to sound chip
	sertxd("reverse percent is ",#b2,13,10)
	goto main

 

[hippy]

Where would I find information on minus step values and how to implement??
Trying to use rc input to generate a 3.3 volt output from the neutral position of the throttle stick in both directions. i.e. zero to 3.3 forward and zero to 3.3 reverse.
I have the first bit (iI think) but need to find info on minus stepping.

I think you'll need to explain exactly what you mean by "minus stepping" and what that translates to in electrical and control terms.

A circuit diagram would help, or details of what components / motor driver you are controlling and what inputs that expects.

 

[bluejets]

I have at different times, seen reference in here to "step -1" but I cannot find it in tutorials anywhere and not sure how to implement it in code anywhere.
I have found that trying to do a "search" can take one on a round trip that can take days before one finds anything remotely like what the search is about.
Turns out I have ended up approching the problem from a different angle and do not need this but I would still like to know for future reference.
I have included a layout of what I am trying to get to with the above code as you suggested.
Thanks....

 

[hippy]

"STEP" and "STEP -1" relate to adjusting the control variable in a FOR-NEXT loop. SEe PICAXE Manual 2 "Basic Commands" for further details.

 

[Paix]

Contrasting the two forms, the step can be greater than 1

; [B]Positive stepping example[/B]
main:
    [B]for b0 = 1 to 20[/B]     ; define loop for 20 times, stepping positively (counting up)
                         ; can also be expressed as [B][COLOR="Red"]for b0 = 1 to 20 step 1[/COLOR][/B]
    if pinC.1 = 1 then exit

    high B.1 ; switch on output B.1
    pause 500 ; wait 0.5 seconds
    low B.1 ; switch off output B.1
    pause 500 ; wait 0.5 seconds
    [B]next b0[/B] ; end of loop

pause 2000 ; wait for 2 seconds
goto main ; loop back to start

; [B]Negative stepping example[/B]
main:
    [B]for b0 = 20 to 1 step -1[/B]     ; define loop for 20 times, stepping negatively (counting down)
    if pinC.1 = 1 then exit

    high B.1 ; switch on output B.1
    pause 500 ; wait 0.5 seconds
    low B.1 ; switch off output B.1
    pause 500 ; wait 0.5 seconds
    [B]next b0[/B] ; end of loop

pause 2000 ; wait for 2 seconds
goto main ; loop back to start

I hope that this helps somewhat.