SCP1000.h

00001 /**
00002  * @section LICENSE
00003  * This program is free software; you can redistribute it and/or modify 
00004  * it under the terms of the GNU General Public License as published by 
00005  * the Free Software Foundation; either version 2 of the License, or 
00006  * (at your option) any later version.
00007  * 
00008  * This program is distributed in the hope that it will be useful, but 
00009  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
00010  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
00011  * for more details.
00012  * 
00013  * You should have received a copy of the GNU General Public License along 
00014  * with this program; if not, write to the Free Software Foundation, Inc., 
00015  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
00016  *
00017  * @section DESCRIPTION
00018  * Library to interface with the SCP1000 pressure and temperature sensor.
00019  */
00020 
00021 #ifndef _SCP1000_H
00022 #define _SCP1000_H
00023 
00024 #include "mbed.h"
00025 
00026 /**
00027  * Class to interface with the SCP1000 pressure and temperature sensor.
00028  */
00029 class SCP1000 {
00030     public:
00031         /**
00032          * Constructor.
00033          *
00034          * @param mosi SPI MOSI pin
00035          * @param miso SPI MISO pin
00036          * @param sclk SPI SCLK pin
00037          * @param cs Chip select pin
00038          */
00039         SCP1000(PinName mosi, PinName miso, PinName sclk, PinName cs);
00040         
00041         ~SCP1000() { /* empty */ };
00042         
00043         /**
00044          * Read the pressure.
00045          *
00046          * @returns The pressure in pascals.
00047          */
00048         unsigned long readPressure();
00049         
00050         /**
00051          * Read the temperature.
00052          *
00053          * @returns The temperature in Celsius.
00054          */
00055         float readTemperature();
00056         
00057         
00058     private:
00059         static const char PRESSURE = 0x1F;   //Pressure 3 MSB
00060         static const char PRESSURE_LSB = 0x20; //Pressure 16 LSB
00061         static const char TEMP = 0x21;       //16 bit temp
00062         SPI m_spi;
00063         DigitalOut m_cs;
00064         
00065         char read_register(char register_name);
00066         void write_register(char register_name, char register_value);
00067         float read_register16(char register_name);
00068 
00069 };
00070 
00071 #endif // _SCP1000_H