1765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang/* 2765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com> 3765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * Copyright (c) 2014 Intel Corporation. 4765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * 5765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * Permission is hereby granted, free of charge, to any person obtaining 6765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * a copy of this software and associated documentation files (the 7765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * "Software"), to deal in the Software without restriction, including 8765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * without limitation the rights to use, copy, modify, merge, publish, 9765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * distribute, sublicense, and/or sell copies of the Software, and to 10765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * permit persons to whom the Software is furnished to do so, subject to 11765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * the following conditions: 12765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * 13765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * The above copyright notice and this permission notice shall be 14765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * included in all copies or substantial portions of the Software. 15765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * 16765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang */ 24765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 25765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <iostream> 26765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <unistd.h> 27765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <stdlib.h> 28765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <stdexcept> 29765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 30765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include "maxds3231m.h" 31765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 32765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangusing namespace upm; 33765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 34765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::MAXDS3231M (int bus, int devAddr) : m_i2Ctx(bus) { 35765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang m_name = "MAXDS3231M"; 36765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 37765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang m_i2cAddr = devAddr; 38765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang m_bus = bus; 39765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 40765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang mraa::Result ret = m_i2Ctx.address(m_i2cAddr); 41765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang if (ret != mraa::SUCCESS) { 42765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang throw std::invalid_argument(std::string(__FUNCTION__) + 43765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang ": m_i2Ctx.address() failed"); 44765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang } 45765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 46765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 47765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangvoid 48765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::setDate (Time3231 &time) { 49765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang uint8_t *data = (uint8_t *)&time; 50765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 51765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang i2cWriteReg_N (TIME_CAL_ADDR, 7, data); 52765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 53765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 54765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangbool 55765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::getDate (Time3231 &time) { 56765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang uint8_t buffer[7]; 57765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 58765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang // We need 7 bytes of data. 59765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang if (i2cReadReg_N (TIME_CAL_ADDR, 7, buffer) > 6) { 60765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang uint8_t century = (buffer[5] & 0x80) >> 7; 61765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 62765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.second = BCDtoDEC(buffer[0]); 63765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.minute = BCDtoDEC(buffer[1]); 64765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.hour = BCDtoDEC(buffer[2]); 65765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.day = BCDtoDEC(buffer[4]); 66765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.month = BCDtoDEC(buffer[5] & 0x1F); 67765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.year = (century == 1) ? 2000 + BCDtoDEC(buffer[6]) : 1900 + BCDtoDEC(buffer[6]); 68765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.weekDay = BCDtoDEC(buffer[3]); 69765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 70765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return true; 71765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang } 72765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 73765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return false; 74765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 75765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 76765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhanguint16_t 77765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::getTemperature () { 78765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang uint8_t buffer[2]; 79765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang uint8_t msb = 0; 80765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang uint8_t lsb = 0; 81765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 82765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang i2cReadReg_N (TEMPERATURE_ADDR, 2, buffer); 83765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang msb = buffer[0]; 84765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang lsb = buffer[1] >> 6; 85765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 86765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang if ((msb & 0x80) != 0) 87765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang msb |= ~((1 << 8) - 1); // if negative get two's complement 88765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 89765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return 0.25 * lsb + msb; 90765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 91765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 92765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang/* 93765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * ************** 94765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * private area 95765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * ************** 96765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang */ 97765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhanguint16_t 98765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::i2cReadReg_N (int reg, unsigned int len, uint8_t * buffer) { 99765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang int readByte = 0; 100765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 101765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang m_i2Ctx.address(m_i2cAddr); 102765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang m_i2Ctx.writeByte(reg); 103765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 104765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang m_i2Ctx.address(m_i2cAddr); 105765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang readByte = m_i2Ctx.read(buffer, len); 106765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return readByte; 107765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 108765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 109765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangmraa::Result 110765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::i2cWriteReg_N (uint8_t reg, unsigned int len, uint8_t * buffer) { 111765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang mraa::Result error = mraa::SUCCESS; 112765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 113765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang error = m_i2Ctx.address (m_i2cAddr); 114765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang error = m_i2Ctx.write (buffer, len); 115765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 116765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return error; 117765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 118765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 119765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhanguint8_t 120765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::DECtoBSD(uint8_t data) { 121765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return ((data / 10 * 16) + (data % 10)); 122765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 123765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 124765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhanguint8_t 125765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangMAXDS3231M::BCDtoDEC(uint8_t data) { 126765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return ((data / 16 * 10) + (data % 16)); 127765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 128