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Forum Index : Microcontroller and PC projects : Missing Something Simple(PicoMite)

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hitsware2

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Joined: 03/08/2019
Location: United States
Posts: 735

Posted: 10:53pm 04 Dec 2021

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SETPIN pin, PWMnx Allocate pin to PWMnx
'n' is the PWM number (0 to 7) and 'x' and is the channel (A or B)
The setpin can be changed until the PWM command is issued. At that point
the pin becomes locked to PWM until PWMn,OFF is issued.

PWM channel, frequency,
[dutyA] [,dutyB]
PWM channel, OFF
There are 8 separate PWM frequencies available (channels 0 to 7) and up to
16 outputs with individually controlled duty cycle. You can output on either
PWMnA or PWMnB or both for each channel - no restriction.
Minimum frequency is 15Hz. Maximum speed is OPTION CPUSPEED/4
At very fast speeds the duty cycles will be increasingly limited

When I :

SetPin gp14,pwm7a
PWM 7,1000,50,50

I get :

[2] PWM 7,1000,50,50
Error : Pin not set for PWM
>

????

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panky

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Joined: 02/10/2012
Location: Australia
Posts: 1116

Posted: 02:43am 05 Dec 2021

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@hitsware2

You are setting gp14 for use as PWM7a, yet in your pwm line, you try to set both the A channel and the B channel to 50 percent duty cycle but you haven't defined which pin to use for channel B.

If you are not using pin 20 (gp15) for anything else, adding the line SETPIN GP15,PWM7B should fix the problem or loose the second 50 in your PWM line.

Cheers,
Doug.

... almost all of the Maximites, the MicromMites, the MM Extremes, the ArmMites, the PicoMite and loving it!

phil99

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Joined: 11/02/2018
Location: Australia
Posts: 2832

Posted: 02:48am 05 Dec 2021

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From Picomite doc a28

"SETPIN 1,PWM0A 'Provisionally allocate pin 1 (GP0) to PWM0A
SETPIN 2,PWM0B 'Provisionally allocate pin 2 (GP1) tp PWM0B
PWM 0,1000,33,67 'Frequency is 1kHz for PWM0x, PWM0A is 33%, PWM0B is 67%
'The pins are now locked to PWM usage until PWM 0,OFF
PWM 0,OFF 'PWM0A and PWM0B are both off and the pins are released"

Could it be case sensitive?
I don't yet have one to try it.

Cross post . Ignore this.
Edited 2021-12-05 12:50 by phil99

hitsware2

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Joined: 03/08/2019
Location: United States
Posts: 735

Posted: 07:50pm 05 Dec 2021

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panky said @hitsware2

You are setting gp14 for use as PWM7a, yet in your pwm line, you try to set both the A channel and the B channel to 50 percent duty cycle but you haven't defined which pin to use for channel B.

If you are not using pin 20 (gp15) for anything else, adding the line SETPIN GP15,PWM7B should fix the problem or loose the second 50 in your PWM line.

Cheers,
Doug.

That did it ....

Thank You !

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