Nathan Yonkee / MPR121

use mbed os

Dependents:   Seeed_Grove_I2C_Touch_Example

Fork of MPR121 by Sam Grove

MPR121.cpp@25:534ca7bbccf1, 2017-07-02 (annotated)

Committer:
Nathan Yonkee
Date:
Sun Jul 02 16:33:37 2017 -0600
Revision:
25:534ca7bbccf1
Parent:
24:3fda4fe39ac6 
remove everything we can't use with seeed version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Nate Yonkee 9:8cb5ce483be3 1 /**
Nate Yonkee 9:8cb5ce483be3 2 * @file MPR121.cpp
Nate Yonkee 9:8cb5ce483be3 3 * @brief Device driver - MPR121 capactiive touch IC
Nate Yonkee 9:8cb5ce483be3 4 * @author sam grove
Nate Yonkee 9:8cb5ce483be3 5 * @version 1.0
Nate Yonkee 9:8cb5ce483be3 6 * @see http://cache.freescale.com/files/sensors/doc/data_sheet/MPR121.pdf
Nate Yonkee 9:8cb5ce483be3 7 *
Nate Yonkee 9:8cb5ce483be3 8 * Copyright (c) 2013
Nate Yonkee 9:8cb5ce483be3 9 *
Nate Yonkee 9:8cb5ce483be3 10 * Licensed under the Apache License, Version 2.0 (the "License");
Nate Yonkee 9:8cb5ce483be3 11 * you may not use this file except in compliance with the License.
Nate Yonkee 9:8cb5ce483be3 12 * You may obtain a copy of the License at
Nate Yonkee 9:8cb5ce483be3 13 *
Nate Yonkee 9:8cb5ce483be3 14 * http://www.apache.org/licenses/LICENSE-2.0
Nate Yonkee 9:8cb5ce483be3 15 *
Nate Yonkee 9:8cb5ce483be3 16 * Unless required by applicable law or agreed to in writing, software
Nate Yonkee 9:8cb5ce483be3 17 * distributed under the License is distributed on an "AS IS" BASIS,
Nate Yonkee 9:8cb5ce483be3 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Nate Yonkee 9:8cb5ce483be3 19 * See the License for the specific language governing permissions and
Nate Yonkee 9:8cb5ce483be3 20 * limitations under the License.
Nate Yonkee 9:8cb5ce483be3 21 */
Nate Yonkee 9:8cb5ce483be3 22
Nate Yonkee 9:8cb5ce483be3 23 #include "MPR121.h"
Nate Yonkee 9:8cb5ce483be3 24 #include "mbed_debug.h"
Nate Yonkee 9:8cb5ce483be3 25
Nate Yonkee 9:8cb5ce483be3 26 #define DEBUG 1
Nate Yonkee 9:8cb5ce483be3 27
Nathan Yonkee 25:534ca7bbccf1 28 MPR121::MPR121(I2C &i2c) {
Nathan Yonkee 12:22d36da8df91 29 _i2c = &i2c;
Nathan Yonkee 12:22d36da8df91 30 _i2c_addr = (0x1b << 1);
Nathan Yonkee 12:22d36da8df91 31 }
Nathan Yonkee 12:22d36da8df91 32
Nathan Yonkee 12:22d36da8df91 33
Nathan Yonkee 25:534ca7bbccf1 34 bool MPR121::isPressed(void) {
Nathan Yonkee 25:534ca7bbccf1 35 bool result = buttonPressed() == 0 ? false : true;
Nathan Yonkee 25:534ca7bbccf1 36 return result;
Nathan Yonkee 12:22d36da8df91 37 }
Nathan Yonkee 12:22d36da8df91 38
Nathan Yonkee 25:534ca7bbccf1 39 uint16_t MPR121::buttonPressed(void) {
Nathan Yonkee 12:22d36da8df91 40 char reg[1] = { 0x03 };
Nathan Yonkee 12:22d36da8df91 41 int result=0;
Nathan Yonkee 12:22d36da8df91 42 char data = -1;
Nathan Yonkee 12:22d36da8df91 43 result = _i2c->write(_i2c_addr, reg, 1, true);
Nathan Yonkee 25:534ca7bbccf1 44 if(result == 0 ) debug("result is 0");
Nathan Yonkee 25:534ca7bbccf1 45 result = _i2c->read(_i2c_addr, &data, 1);
Nathan Yonkee 25:534ca7bbccf1 46 if(result == 0 ) debug("result is 0");
Nathan Yonkee 12:22d36da8df91 47 if(data == 4) data = 3;
Nathan Yonkee 12:22d36da8df91 48 if(data == 2) data = 2;
Nathan Yonkee 12:22d36da8df91 49 if(data == 1) data = 1;
Nathan Yonkee 12:22d36da8df91 50 return data;
Nathan Yonkee 12:22d36da8df91 51 }