LED USB LAMP

gistfile1.cpp

 /* LED USB Lamp

This program controls a high power LED via PWM and reads in a touch pad.

The circuit: * LED attached from digital pin 3 to ground. * touch pad connected to pin 6 and 5

Created 18 Aug 2012 By Sebastian Schuster

*/

#include <CapSense.h>

CapSense cs_6_5 = CapSense(6,5); // 10M resistor between pins 4 & 2, pin 2 is sensor pin, add a wire and or foil if desired int ledPin = 3; // LED connected to digital pin 9

int actualState = 0; int nextState = 0;

void setup() { cs_6_5.set_CS_AutocaL_Millis(0xFFFFFFFF); // turn off autocalibrate on channel 1 - just as an example Serial.begin(9600);

actualState = 0; }

boolean readTouchpad(){ long start = millis(); long touchpad = cs_6_5.capSense(30); boolean onOff=0;

Serial.print(millis() - start); // check on performance in milliseconds Serial.print("\t"); // tab character for debug windown spacing Serial.println(touchpad); // print sensor output 1

if (touchpad > 100) onOff=1; return onOff; }

/* state 0: LED on (100%)

(transistion: touch pad activated) state 1: LED on (fading down)

(transistion: touch pad activated) state 2: LED on (fading stop)

(transistion: touch pad activated) state 3: LED on (fading up)

(transistion: touch pad activated) state 4: LED on (fading stop)

*/

int fadeValue= 255; long timer_125ms=0; long timer_125ms_old=0; boolean touchpadPressed_old=0;

void loop() {

timer_125ms = millis();

long timer_diff_125ms = timer_125ms - timer_125ms_old;

//abfrage alle 500ms if(timer_diff_125ms>125) { boolean touchpadPressed = readTouchpad();

switch (actualState) { case 0: Serial.println("State: 0");

if((touchpadPressed==1)&&(touchpadPressed_old==0)) nextState = 1; break; case 1: Serial.println("State: 1");

if((touchpadPressed==1)&&(touchpadPressed_old==0)) nextState = 2; break; case 2: Serial.println("State: 2");

if((touchpadPressed==1)&&(touchpadPressed_old==0)) nextState = 3; break; case 3: Serial.println("State: 3");

if((touchpadPressed==1)&&(touchpadPressed_old==0)) nextState = 4; break; case 4: Serial.println("State: 4");

if((touchpadPressed==1)&&(touchpadPressed_old==0)) nextState = 0; break; }

touchpadPressed_old=touchpadPressed; timer_125ms_old = millis(); }

//##################################################

if(actualState==0) { fadeValue = 255; analogWrite(ledPin, fadeValue); }

else if(actualState==1) { fadeValue -=3; analogWrite(ledPin, fadeValue); }

else if(actualState==3) { fadeValue +=3; analogWrite(ledPin, fadeValue); }

//################################################## actualState=nextState; delay(50); }