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Forum Index : Microcontroller and PC projects : Pi-Pico Picomite PIN42(GP24) ??

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Hansaplast
Newbie

Joined: 13/07/2023
Location: Hong Kong
Posts: 13

Posted: 09:44am 13 Sep 2023

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The following message by using OPTION SDCARD

> OPTION SDCARD GP24
Error : Pin 42/GP24 is in use

the same happen with

> OPTION SDCARD GP23
Error : Pin 41/GP23 is in use

This can't be, as PIN 42 of the Pi-Pico is VCC (IOVDD) and GP24 is PIN 36

or I'm wrong??
Edited 2023-09-13 19:52 by Hansaplast

circuit
Senior Member

Joined: 10/01/2016
Location: United Kingdom
Posts: 293

Posted: 10:04am 13 Sep 2023

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Hansaplast said The following message by using OPTION SDCARD

> OPTION SDCARD GP24
Error : Pin 42/GP24 is in use

the same happen with

> OPTION SDCARD GP23
Error : Pin 41/GP23 is in use

This can't be, as PIN 42 of the Pi-Pico is VCC (IOVDD) and GP24 is PIN 36

or I'm wrong??

See the Picomite manual page 10;

"On the Raspberry Pi Pico these pins are used for internal functions as follows;
Pin 42 or GP24 is a digital input which is high when VBUS is present".

Hansaplast
Newbie

Joined: 13/07/2023
Location: Hong Kong
Posts: 13

Posted: 10:11am 13 Sep 2023

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Yes, I saw

 Pin 41 or GP23 is a digital output set to the value of OPTION POWER. (ON=PWM, OFF=PFM).
 Pin 42 or GP24 is a digital input, which is high when VBUS is present.
 Pin 43 or GP25 is also PWM4B. It is an output connected to the on-board LED.
 Pin 44 or GP29 is also ADC3 which is an analog input reading ⅓ of VSYS.

Is there any way to make it working?, as I use the Pi-Pico chip on my own PCB with all ports.

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10636

Posted: 10:43am 13 Sep 2023

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Just set them off before use

SETPIN GP23,OFF

etc.

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