main.cpp

00001 #include <mbed.h>
00002 #include <mpr121.h>
00003 DigitalOut led1(LED1);
00004 DigitalOut led2(LED2);
00005 DigitalOut led3(LED3);
00006 DigitalOut led4(LED4);
00007 // Create the interrupt receiver object on pin 26
00008 InterruptIn interrupt(p26);
00009 // Setup the i2c bus on pins 9 and 10
00010 I2C i2c(p9, p10);
00011 // Setup the Mpr121:
00012 // constructor(i2c object, i2c address of the mpr121)
00013 Mpr121 mpr121(&i2c, Mpr121::ADD_VSS);
00014  
00015 // Key hit/release interrupt routine
00016 void fallInterrupt() {
00017   int key_code=0;
00018   int i=0;
00019   int value=mpr121.read(0x00);
00020   value +=mpr121.read(0x01)<<8;
00021   // LED demo mod
00022   i=0;
00023   // puts key number out to LEDs for demo
00024   for (i=0; i<12; i++) {
00025   if (((value>>i)&0x01)==1) key_code=i+1;
00026   }
00027   led4=key_code & 0x01;
00028   led3=(key_code>>1) & 0x01;
00029   led2=(key_code>>2) & 0x01;
00030   led1=(key_code>>3) & 0x01;
00031 }
00032  
00033 int main() {
00034   interrupt.fall(&fallInterrupt);
00035   interrupt.mode(PullUp);
00036   while (1) {}
00037 }