1/*
2 * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
3 * Copyright (c) 2014 Intel Corporation.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#include <iostream>
26#include <string>
27#include <stdexcept>
28#include <unistd.h>
29#include <stdlib.h>
30
31#include "max44000.h"
32
33using namespace upm;
34
35MAX44000::MAX44000 (int bus, int devAddr) : m_i2cMaxControlCtx(bus) {
36    m_name = "MAX44000";
37
38    m_maxControlAddr = devAddr;
39    m_bus = bus;
40
41    mraa::Result ret = m_i2cMaxControlCtx.address(m_maxControlAddr);
42    if (ret != mraa::SUCCESS) {
43        throw std::invalid_argument(std::string(__FUNCTION__) +
44                                    ": mraa_i2c_address() failed");
45    }
46
47    // i2cWriteReg (MCR, 0x2C);
48    // i2cWriteReg (TCR, 0x6);
49}
50
51uint16_t
52MAX44000::getProximity () {
53    uint16_t data = 0;
54
55    data = (i2cReadReg_8 (ALSDATA_HIGH) & 0x7F) << 8;
56    data = data | i2cReadReg_8 (ALSDATA_LOW);
57
58    return data;
59}
60
61uint16_t
62MAX44000::getAmbient () {
63    uint16_t data = 0;
64
65    data = (i2cReadReg_8 (ALSDATA_HIGH) & 0x7F) << 8;
66    data = data | i2cReadReg_8 (ALSDATA_LOW);
67
68    return data;
69}
70
71/*
72 * **************
73 *  private area
74 * **************
75 */
76uint8_t
77MAX44000::i2cReadReg_8 (int reg) {
78    uint8_t data;
79
80    m_i2cMaxControlCtx.address(m_maxControlAddr);
81    m_i2cMaxControlCtx.writeByte(reg);
82
83    m_i2cMaxControlCtx.address(m_maxControlAddr);
84    m_i2cMaxControlCtx.read(&data, 0x1);
85
86    return data;
87}
88
89uint16_t
90MAX44000::i2cReadReg_16 (int reg) {
91    uint16_t data;
92
93    m_i2cMaxControlCtx.address(m_maxControlAddr);
94    m_i2cMaxControlCtx.writeByte(reg);
95
96    m_i2cMaxControlCtx.address(m_maxControlAddr);
97    m_i2cMaxControlCtx.read((uint8_t *)&data, 0x2);
98
99    return data;
100}
101
102mraa::Result
103MAX44000::i2cWriteReg (uint8_t reg, uint8_t value) {
104    mraa::Result error = mraa::SUCCESS;
105
106    uint8_t data[2] = { reg, value };
107    error = m_i2cMaxControlCtx.address (m_maxControlAddr);
108    error = m_i2cMaxControlCtx.write (data, 2);
109
110    return error;
111}
112