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10 years, 10 months ago.

analog in

We are trying to use analog in coding. According to instantaneous voltage given to analog pin, corresponding loop must be executed. But its not working for a simple else code./media/uploads/pprs/code.docx

  1. include "mbed.h"

AnalogIn ain(p20); DigitalOut myled(LED1); DigitalOut myled1(LED2); int main(void) { while(1) { float p=ain.read(); if(ain<0.4f) { myled=1; myled1=0; } else { myled=0; myled1=1; } } }

2 Answers

hsn alattar
10 years, 10 months ago.

well, how much voltage you are giving the (P20) ??

Paul Driessen
10 years, 10 months ago.

float p=ain.read(); << value from analogin transferred to p. <br/> if(ain<0.4f) << wrong, your comparing the wrong variable. it should be: if(p<0.4f) << p is the variable with the value

cheers, Paul

i know what you are saying is good ... how ever i though that too .. but then i see the original link of analogin

https://developer.mbed.org/handbook/AnalogIn

they are using ain<0.3f too ..

posted by hsn alattar 24 Mar 2015