Zainul Charbiwala / Mbed 2 deprecated TouchSense

Using a capacitor to implement a touch sensitive \"button\"

Dependencies:   mbed

main.cpp@0:1d63f10fba0a, 2010-10-19 (annotated)

Committer:
zainulcharbiwala
Date:
Tue Oct 19 00:08:04 2010 +0000
Revision:
0:1d63f10fba0a
Initial upload of TouchSense

Who changed what in which revision?

UserRevisionLine numberNew contents of line
zainulcharbiwala 0:1d63f10fba0a 1 #include "mbed.h"
zainulcharbiwala 0:1d63f10fba0a 2
zainulcharbiwala 0:1d63f10fba0a 3 #define numsamples 1
zainulcharbiwala 0:1d63f10fba0a 4 int touchSense(void);
zainulcharbiwala 0:1d63f10fba0a 5
zainulcharbiwala 0:1d63f10fba0a 6 DigitalOut myled(LED1);
zainulcharbiwala 0:1d63f10fba0a 7 AnalogIn input(p20);
zainulcharbiwala 0:1d63f10fba0a 8 DigitalIn charger(p19);
zainulcharbiwala 0:1d63f10fba0a 9 DigitalOut ground(p18);
zainulcharbiwala 0:1d63f10fba0a 10 Serial pc(USBTX, USBRX); // tx, rx
zainulcharbiwala 0:1d63f10fba0a 11
zainulcharbiwala 0:1d63f10fba0a 12 int main() {
zainulcharbiwala 0:1d63f10fba0a 13 while(1) {
zainulcharbiwala 0:1d63f10fba0a 14 if (touchSense()) {
zainulcharbiwala 0:1d63f10fba0a 15 myled = 1;
zainulcharbiwala 0:1d63f10fba0a 16 } else {
zainulcharbiwala 0:1d63f10fba0a 17 myled = 0;
zainulcharbiwala 0:1d63f10fba0a 18 }
zainulcharbiwala 0:1d63f10fba0a 19 wait(0.005);
zainulcharbiwala 0:1d63f10fba0a 20 }
zainulcharbiwala 0:1d63f10fba0a 21 }
zainulcharbiwala 0:1d63f10fba0a 22
zainulcharbiwala 0:1d63f10fba0a 23 int touchSense(void)
zainulcharbiwala 0:1d63f10fba0a 24 {
zainulcharbiwala 0:1d63f10fba0a 25 float sample;
zainulcharbiwala 0:1d63f10fba0a 26 ground = 0;
zainulcharbiwala 0:1d63f10fba0a 27 charger.mode(PullUp);
zainulcharbiwala 0:1d63f10fba0a 28 charger.mode(PullNone);
zainulcharbiwala 0:1d63f10fba0a 29 sample=input.read();
zainulcharbiwala 0:1d63f10fba0a 30 if (sample < 0.3) {
zainulcharbiwala 0:1d63f10fba0a 31 return 1;
zainulcharbiwala 0:1d63f10fba0a 32 } else {
zainulcharbiwala 0:1d63f10fba0a 33 return 0;
zainulcharbiwala 0:1d63f10fba0a 34 }
zainulcharbiwala 0:1d63f10fba0a 35 }