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f64c710c12
Run .clang-format on the header and source files Add missing braces Signed-off-by: Wouter van Verre <wouter.van.verre@intel.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
145 lines
3.5 KiB
C++
145 lines
3.5 KiB
C++
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <unistd.h>
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#include <math.h>
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#include <iostream>
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#include <string>
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#include "at42qt1070.h"
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using namespace upm;
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using namespace std;
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AT42QT1070::AT42QT1070(int bus, uint8_t address)
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{
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m_addr = address;
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// setup our i2c link
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if (!(m_i2c = mraa_i2c_init(bus))) {
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cerr << __FUNCTION__ << ": mraa_i2c_init() failed." << endl;
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return;
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}
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mraa_result_t rv;
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if ((rv = mraa_i2c_address(m_i2c, m_addr)) != MRAA_SUCCESS) {
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cerr << __FUNCTION__ << ": Could not initialize i2c bus. " << endl;
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mraa_result_print(rv);
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return;
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}
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m_buttonStates = false;
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m_calibrating = false;
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m_overflow = false;
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}
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AT42QT1070::~AT42QT1070()
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{
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mraa_i2c_stop(m_i2c);
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}
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bool
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AT42QT1070::writeByte(uint8_t reg, uint8_t byte)
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{
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mraa_result_t rv = mraa_i2c_write_byte_data(m_i2c, byte, reg);
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if (rv != MRAA_SUCCESS) {
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cerr << __FUNCTION__ << ": mraa_i2c_write_byte() failed." << endl;
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mraa_result_print(rv);
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return false;
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}
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return true;
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}
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bool
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AT42QT1070::writeWord(uint8_t reg, uint16_t word)
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{
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mraa_result_t rv = mraa_i2c_write_word_data(m_i2c, word, reg);
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if (rv != MRAA_SUCCESS) {
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cerr << __FUNCTION__ << ": mraa_i2c_write_word() failed." << endl;
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mraa_result_print(rv);
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return false;
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}
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return true;
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}
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uint8_t
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AT42QT1070::readByte(uint8_t reg)
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{
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return mraa_i2c_read_byte_data(m_i2c, reg);
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}
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uint16_t
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AT42QT1070::readWord(uint8_t reg)
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{
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return mraa_i2c_read_word_data(m_i2c, reg);
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}
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void
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AT42QT1070::updateState()
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{
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uint8_t stat = readByte(REG_DETSTATUS);
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// if we are calibrating, don't change anything
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if (stat & DET_CALIBRATE) {
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m_calibrating = true;
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return;
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} else {
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m_calibrating = false;
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}
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if (stat & DET_OVERFLOW)
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m_overflow = true;
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else
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m_overflow = false;
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// if a touch is occurring, read the button states
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if (stat & DET_TOUCH) {
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uint8_t keys = readByte(REG_KEYSTATUS);
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// high bit is reserved, filter it out
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m_buttonStates = keys & ~0x80;
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} else {
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m_buttonStates = 0;
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}
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}
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bool
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AT42QT1070::reset()
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{
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// write a non-zero value to the reset register
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return writeByte(REG_RESET, 0xff);
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}
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bool
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AT42QT1070::calibrate()
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{
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// write a non-zero value to the calibrate register
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return writeByte(REG_CALIBRATE, 0xff);
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}
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