--- /dev/null
+/*
+ * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <iostream>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "maxds3231m.h"
+
+using namespace upm;
+
+struct DS3231Exception : public std::exception {
+ std::string message;
+ DS3231Exception (std::string msg) : message (msg) { }
+ ~DS3231Exception () throw () { }
+ const char* what() const throw () { return message.c_str(); }
+};
+
+MAXDS3231M::MAXDS3231M (int bus, int devAddr) {
+ m_name = "MAXDS3231M";
+
+ m_i2cAddr = devAddr;
+ m_bus = bus;
+
+ m_i2Ctx = mraa_i2c_init(m_bus);
+
+ mraa_result_t ret = mraa_i2c_address(m_i2Ctx, m_i2cAddr);
+ if (ret != MRAA_SUCCESS) {
+ throw DS3231Exception ("Couldn't initilize I2C.");
+ }
+}
+
+MAXDS3231M::~MAXDS3231M() {
+ mraa_i2c_stop(m_i2Ctx);
+}
+
+void
+MAXDS3231M::setDate (Time3231 &time) {
+ uint8_t *data = (uint8_t *)&time;
+
+ i2cWriteReg_N (TIME_CAL_ADDR, 7, data);
+}
+
+bool
+MAXDS3231M::getDate (Time3231 &time) {
+ uint8_t buffer[7];
+
+ // We need 7 bytes of data.
+ if (i2cReadReg_N (TIME_CAL_ADDR, 7, buffer) > 6) {
+ uint8_t century = (buffer[5] & 0x80) >> 7;
+
+ time.second = BCDtoDEC(buffer[0]);
+ time.minute = BCDtoDEC(buffer[1]);
+ time.hour = BCDtoDEC(buffer[2]);
+ time.day = BCDtoDEC(buffer[4]);
+ time.month = BCDtoDEC(buffer[5] & 0x1F);
+ time.year = (century == 1) ? 2000 + BCDtoDEC(buffer[6]) : 1900 + BCDtoDEC(buffer[6]);
+ time.weekDay = BCDtoDEC(buffer[3]);
+
+ return true;
+ }
+
+ return false;
+}
+
+uint16_t
+MAXDS3231M::getTemperature () {
+ uint8_t buffer[2];
+ uint16_t tempRaw = 0;
+
+ i2cReadReg_N (TEMPERATURE_ADDR, 2, buffer);
+ tempRaw = (((int16_t)buffer[0]) << 8) | buffer[1];
+
+ return tempRaw;
+}
+
+/*
+ * **************
+ * private area
+ * **************
+ */
+uint16_t
+MAXDS3231M::i2cReadReg_N (int reg, unsigned int len, uint8_t * buffer) {
+ int readByte = 0;
+
+ if (m_i2Ctx == NULL) {
+ throw DS3231Exception ("Couldn't find initilized I2C.");
+ }
+
+ mraa_i2c_address(m_i2Ctx, m_i2cAddr);
+ mraa_i2c_write_byte(m_i2Ctx, reg);
+
+ mraa_i2c_address(m_i2Ctx, m_i2cAddr);
+ readByte = mraa_i2c_read(m_i2Ctx, buffer, len);
+ return readByte;
+}
+
+mraa_result_t
+MAXDS3231M::i2cWriteReg_N (uint8_t reg, unsigned int len, uint8_t * buffer) {
+ mraa_result_t error = MRAA_SUCCESS;
+
+ if (m_i2Ctx == NULL) {
+ throw DS3231Exception ("Couldn't find initilized I2C.");
+ }
+
+ error = mraa_i2c_address (m_i2Ctx, m_i2cAddr);
+ error = mraa_i2c_write (m_i2Ctx, buffer, len);
+
+ return error;
+}
+
+uint8_t
+MAXDS3231M::DECtoBSD(uint8_t data) {
+ return ((data / 10 * 16) + (data % 10));
+}
+
+uint8_t
+MAXDS3231M::BCDtoDEC(uint8_t data) {
+ return ((data / 16 * 10) + (data % 16));
+}
--- /dev/null
+/*
+ * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#pragma once
+
+#include <string>
+#include <mraa/i2c.h>
+
+#define ADDR 0x68 // device address
+
+// timekeeping registers
+#define TIME_CAL_ADDR 0x00
+#define ALARM1_ADDR 0x07
+#define ALARM2_ADDR 0x0B
+#define CONTROL_ADDR 0x0E
+#define STATUS_ADDR 0x0F
+#define AGING_OFFSET_ADDR 0x10
+#define TEMPERATURE_ADDR 0x11
+
+// control register bits
+#define A1IE 0x1
+#define A2IE 0x2
+#define INTCN 0x4
+
+// status register bits
+#define A1F 0x1
+#define A2F 0x2
+#define OSF 0x80
+
+#define HIGH 1
+#define LOW 0
+
+namespace upm {
+
+struct Time3231 {
+ uint8_t second;
+ uint8_t minute;
+ uint8_t hour;
+ uint8_t day;
+ uint8_t month;
+ int16_t year;
+ uint8_t weekDay;
+};
+
+/**
+ * @brief C++ API for MAXDS3231M chip (Ambient and Infrared Proximity Sensor)
+ *
+ * This file defines the MAXDS3231M C++ interface for libmax44000
+ *
+ */
+class MAXDS3231M {
+ public:
+ /**
+ * Instanciates a MAXDS3231M object
+ *
+ * @param bus number of used bus
+ * @param devAddr addres of used i2c device
+ */
+ MAXDS3231M (int bus, int devAddr);
+
+ /**
+ * MAXDS3231M object destructor, basicaly it close i2c connection.
+ */
+ ~MAXDS3231M ();
+
+ /**
+ * Set date and time on the chip.
+ *
+ * @param time staracture
+ */
+ void setDate (Time3231 &time);
+
+ /**
+ * Get date and time located on the chip.
+ *
+ * @param time staracture
+ */
+ bool getDate (Time3231 &time);
+
+ /**
+ * Get on board temperature.
+ */
+ uint16_t getTemperature ();
+
+ /**
+ * Return name of the component
+ */
+ std::string name()
+ {
+ return m_name;
+ }
+ private:
+ std::string m_name;
+
+ int m_i2cAddr;
+ int m_bus;
+ mraa_i2c_context m_i2Ctx;
+
+ uint16_t i2cReadReg_N (int reg, unsigned int len, uint8_t * buffer);
+ mraa_result_t i2cWriteReg_N (uint8_t reg, unsigned int len, uint8_t * buffer);
+ uint8_t DECtoBSD (uint8_t data);
+ uint8_t BCDtoDEC (uint8_t data);
+};
+
+}
projects / contrib / upm.git / commitdiff