MS5611I2C.h

00001 /*
00002 Copyright (c) 2012, Senio Networks, Inc.
00003 
00004 Permission is hereby granted, free of charge, to any person obtaining a copy
00005 of this software and associated documentation files (the "Software"), to deal
00006 in the Software without restriction, including without limitation the rights
00007 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008 copies of the Software, and to permit persons to whom the Software is
00009 furnished to do so, subject to the following conditions:
00010 
00011 The above copyright notice and this permission notice shall be included in
00012 all copies or substantial portions of the Software.
00013 
00014 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020 THE SOFTWARE.
00021 */
00022 
00023 /*  MS5611 Modifications
00024 Aerodyne Labs
00025 Matthew Nelson - 2014
00026 This library was originally the MS5607 library.  It has been modified to 
00027 to be used the MS5611 Pressure sensor
00028 */
00029 
00030 #ifndef MS5611_I2C_H
00031 #define MS5611_I2C_H
00032 
00033 #include "MS5611Base.h"
00034 
00035 class MS5611I2C : public MS5611Base {
00036 public:
00037     MS5611I2C(PinName sda, PinName scl, int csb = 0) : i2c(sda, scl), i2cAddr(csb ? 0xEC : 0xEE) {
00038         init();
00039     }
00040 
00041 private:
00042     I2C i2c;
00043     int i2cAddr;
00044 
00045     virtual void writeCommand(int command, int ms = 0) {
00046         char buf[1] = {command};
00047         i2c.write(i2cAddr, buf, 1);
00048         if (ms) wait_ms(ms);
00049     }
00050 
00051     virtual int readPROM(int address) {
00052         char buf[2] = {PROM_READ | (address << 1), 0};
00053 
00054         if (i2c.write(i2cAddr, buf, 1) == 0 &&
00055             i2c.read(i2cAddr, buf, 2) == 0)
00056             return buf[0] << 8 | buf[1];
00057 
00058         return -1;
00059     }
00060 
00061     virtual int readADC(int command) {
00062         char cmd[] = {ADC_CONV | command};
00063 
00064         if (i2c.write(i2cAddr, cmd, sizeof(cmd)) == 0) {
00065             static int duration[] = {500, 1100, 2100, 4100, 8220};
00066             wait_us(duration[(command & 0x0F) >> 1]);
00067             cmd[0] = ADC_READ;
00068             char buf[3];
00069             if (i2c.write(i2cAddr, cmd, sizeof(cmd)) == 0 &&
00070                 i2c.read(i2cAddr, buf, sizeof(buf)) == 0)
00071                 return buf[0] << 16 | buf[1] << 8 | buf[2];
00072         }
00073 
00074         return -1;
00075     }
00076 };
00077 
00078 #endif