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      1 /*
      2  * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha (at) 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 
     33 using namespace upm;
     34 
     35 MAX44000::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 
     51 uint16_t
     52 MAX44000::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 
     61 uint16_t
     62 MAX44000::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  */
     76 uint8_t
     77 MAX44000::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 
     89 uint16_t
     90 MAX44000::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 
    102 mraa::Result
    103 MAX44000::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