This program aims to be an easy example for those starting, focusing in the analog input an digital output. The diagrams and wirings at http://mbed.org/users/Sergio/notebook/simple-voltage-indicator/#
main.cpp
- Committer:
- Sergio
- Date:
- 2010-09-07
- Revision:
- 0:acf4358ae130
File content as of revision 0:acf4358ae130:
#include "mbed.h" AnalogIn input(p20); //the range of the analog input goes, from 0 V. to 3.3V. // the actual value is represented as a float from 0 to 1. DigitalOut led1(LED1); DigitalOut led2(LED2); DigitalOut led3(LED3); DigitalOut led4(LED4); int main() { float ain; //ain must be a float, for matching the input.read type. while (1) { ain=input.read(); if (ain<0.15) { //if analog input <0.15*3.3=0.45V led1=0; led2=0; led3=0; led4=0; } else if ( ain>0.15 && ain<0.3) { // ain>0.45V and ain< 0.99V led1=1; led2=0; led3=0; led4=0; } else if ( ain>0.3 && ain<0.6) { // ain>0.99V and ain<1.98V led1=1; led2=1; led3=0; led4=0; } else if ( ain>0.6 && ain<0.91) { //ain>1.98 and ain>3.01V led1=1; led2=1; led3=1; led4=0; } else { // more that 3 volts. led1=1; led2=2; led3=1; led4=1; } }//end while(1) }//end main