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(P0_29, P0_28);
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. Hamble
00053     i=0;
00054     // puts key number out to LEDs for demo
00055     for (i=0; i<12; i++) {
00056         if (((value>>i)&0x01)==1) key_code=i+1;
00057         }
00058     led4=key_code & 0x01;
00059     led3=(key_code>>1) & 0x01;
00060     led2=(key_code>>2) & 0x01;
00061     led1=(key_code>>3) & 0x01;
00062 }
00063 int main() {
00064 
00065     pc.printf("\nHello from the mbed & mpr121\n\r");
00066 
00067     unsigned char dataArray[2];
00068     int key;
00069     int count = 0;
00070 
00071     pc.printf("Test 1: read a value: \r\n");
00072     dataArray[0] = mpr121.read(AFE_CFG);
00073     pc.printf("Read value=%x\r\n\n",dataArray[0]);
00074 
00075     pc.printf("Test 2: read a value: \r\n");
00076     dataArray[0] = mpr121.read(0x5d);
00077     pc.printf("Read value=%x\r\n\n",dataArray[0]);
00078 
00079     pc.printf("Test 3: write & read a value: \r\n");
00080     mpr121.read(ELE0_T);
00081     mpr121.write(ELE0_T,0x22);
00082     dataArray[0] = mpr121.read(ELE0_T);
00083     pc.printf("Read value=%x\r\n\n",dataArray[0]);
00084 
00085     pc.printf("Test 4: Write many values: \r\n");
00086     unsigned char data[] = {0x1,0x3,0x5,0x9,0x15,0x25,0x41};
00087     mpr121.writeMany(0x42,data,7);
00088 
00089     // Now read them back ..
00090     key = 0x42;
00091     count = 0;
00092     while (count < 7) {
00093         char result = mpr121.read(key);
00094         key++;
00095         count++;
00096         pc.printf("Read value: '%x'=%x\n\r",key,result);
00097     }
00098 
00099     pc.printf("Test 5: Read Electrodes:\r\n");
00100     key = ELE0_T;
00101     count = 0;
00102     while (count < 24) {
00103         char result = mpr121.read(key);
00104         pc.printf("Read key:%x value:%x\n\r",key,result);
00105         key++;
00106         count++;
00107     }
00108     pc.printf("--------- \r\n\n");
00109 
00110     // mpr121.setProximityMode(true);
00111 
00112     pc.printf("ELE_CFG=%x", mpr121.read(ELE_CFG));
00113 
00114     interrupt.fall(&fallInterrupt);
00115     interrupt.mode(PullUp);
00116 
00117     while (1) {
00118         wait(5);
00119         pc.printf(".");
00120     }
00121 }
00122 
00123 
00124