main.cpp

00001 /*
00002 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
00003 
00004 Permission is hereby granted, free of charge, to any person obtaining a copy
00005 of this software and associated documentation files (the "Software"), to deal
00006 in the Software without restriction, including without limitation the rights
00007 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008 copies of the Software, and to permit persons to whom the Software is
00009 furnished to do so, subject to the following conditions:
00010 
00011 The above copyright notice and this permission notice shall be included in
00012 all copies or substantial portions of the Software.
00013 
00014 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020 THE SOFTWARE.
00021 */
00022 
00023 #include <mbed.h>
00024 #include <string>
00025 #include <list>
00026 
00027 #include <mpr121.h>
00028 
00029 DigitalOut led1(LED1);
00030 DigitalOut led2(LED2);
00031 DigitalOut led3(LED3);
00032 DigitalOut led4(LED4);
00033 
00034 // Create the interrupt receiver object on pin 26
00035 InterruptIn interrupt(p26);
00036 
00037 // Setup the Serial to the PC for debugging
00038 Serial pc(USBTX, USBRX);
00039 
00040 // Setup the i2c bus on pins 28 and 27
00041 I2C i2c(p9, p10);
00042 
00043 // Setup the Mpr121:
00044 // constructor(i2c object, i2c address of the mpr121)
00045 Mpr121 mpr121(&i2c, Mpr121::ADD_VSS);
00046 
00047 void fallInterrupt() {
00048     int key_code=0;
00049     int i=0;
00050     int value=mpr121.read(0x00);
00051     value +=mpr121.read(0x01)<<8;
00052     // LED demo mod by J. Hamblen
00053     //pc.printf("MPR value: %x \r\n", value);
00054     i=0;
00055     // puts key number out to LEDs for demo
00056     for (i=0; i<12; i++) {
00057         if (((value>>i)&0x01)==1) key_code=i+1;
00058         }
00059     led4=key_code & 0x01;
00060     led3=(key_code>>1) & 0x01;
00061     led2=(key_code>>2) & 0x01;
00062     led1=(key_code>>3) & 0x01;
00063 }
00064 int main() {
00065 
00066     pc.printf("\nHello from the mbed & mpr121\n\r");
00067 
00068     unsigned char dataArray[2];
00069     int key;
00070     int count = 0;
00071 
00072     pc.printf("Test 1: read a value: \r\n");
00073     dataArray[0] = mpr121.read(AFE_CFG);
00074     pc.printf("Read value=%x\r\n\n",dataArray[0]);
00075 
00076     pc.printf("Test 2: read a value: \r\n");
00077     dataArray[0] = mpr121.read(0x5d);
00078     pc.printf("Read value=%x\r\n\n",dataArray[0]);
00079 
00080     pc.printf("Test 3: write & read a value: \r\n");
00081     mpr121.read(ELE0_T);
00082     mpr121.write(ELE0_T,0x22);
00083     dataArray[0] = mpr121.read(ELE0_T);
00084     pc.printf("Read value=%x\r\n\n",dataArray[0]);
00085 
00086     pc.printf("Test 4: Write many values: \r\n");
00087     unsigned char data[] = {0x1,0x3,0x5,0x9,0x15,0x25,0x41};
00088     mpr121.writeMany(0x42,data,7);
00089 
00090     // Now read them back ..
00091     key = 0x42;
00092     count = 0;
00093     while (count < 7) {
00094         char result = mpr121.read(key);
00095         key++;
00096         count++;
00097         pc.printf("Read value: '%x'=%x\n\r",key,result);
00098     }
00099 
00100     pc.printf("Test 5: Read Electrodes:\r\n");
00101     key = ELE0_T;
00102     count = 0;
00103     while (count < 24) {
00104         char result = mpr121.read(key);
00105         pc.printf("Read key:%x value:%x\n\r",key,result);
00106         key++;
00107         count++;
00108     }
00109     pc.printf("--------- \r\n\n");
00110 
00111     // mpr121.setProximityMode(true);
00112 
00113     pc.printf("ELE_CFG=%x", mpr121.read(ELE_CFG));
00114 
00115     interrupt.fall(&fallInterrupt);
00116     interrupt.mode(PullUp);
00117 
00118     while (1) {
00119         wait(5);
00120         pc.printf(".");
00121     }
00122 }
00123 
00124 
00125