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Forum Index : Microcontroller and PC projects : Confused by SETPIN

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pwillard
Guru

Joined: 07/06/2022
Location: United States
Posts: 329

Posted: 07:16pm 02 Jan 2026

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Trying new version 6 firmware on my old RP2040.

Now I'm confused.

Using the MANUAL example:

SETPIN GP21, DOUT
DO
PIN(GP21) = 1
PAUSE 300
PIN(GP21) = 0
PAUSE 300
LOOP

I get blinking on GPIO pin 16

Using this code:

SETPIN GP16, DOUT

DO
PIN(16) = 1
PAUSE 100
PIN(16) = 0
PAUSE 100
LOOP

I get fast blinking on pin 12.

???

lizby
Guru

Joined: 17/05/2016
Location: United States
Posts: 3528

Posted: 07:29pm 02 Jan 2026

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Pin(16) is GP12. You must use either the pin numbers or the GP numbers--they aren't the same.

PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed

pwillard
Guru

Joined: 07/06/2022
Location: United States
Posts: 329

Posted: 07:31pm 02 Jan 2026

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I think I forgot that... its been a while.

Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 8423

Posted: 08:14am 03 Jan 2026

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Please don't use hardware pin numbers at all if you can avoid it. Doing so can completely screw up compatibility between your software and different hardware platforms. :( The chip itself uses the GPIOxx format, which MMBasic kindly abbreviates to GPxx to save our poor fingers, the I and O keys.

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

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