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How to disable pull down resistor in DigitalIn?

Topic last updated 02 Jun 2011, by Kevin Cheung. 2 replies
Kevin Cheung
02 Jun 2011

I know the pull down resistor is always there when use digitalin function. How do i disable it. On a side note, does anyone know what's the resistor value that the mbed use for pull down (1M?)?

Simon Ford
02 Jun 2011

Hi Kevin,

You can use the mode() method:

#include "mbed.h"

DigitalIn x(p5);

int main() {
    x.mode(PullNone);
}

See http://mbed.org/handbook/DigitalIn

Simon

Kevin Cheung
02 Jun 2011

Thanks so much!