Michael Walker / scp1000-D01

SCP1000-D01 MEMS pressure sensor library

scp1000.h@0:dfe5ae6ea375, 2010-09-27 (annotated)

Committer:
MichaelW
Date:
Mon Sep 27 08:29:02 2010 +0000
Revision:
0:dfe5ae6ea375
Child:
1:a45810688644
Initial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MichaelW 0:dfe5ae6ea375 1 /**
MichaelW 0:dfe5ae6ea375 2 *
MichaelW 0:dfe5ae6ea375 3 */
MichaelW 0:dfe5ae6ea375 4
MichaelW 0:dfe5ae6ea375 5
MichaelW 0:dfe5ae6ea375 6
MichaelW 0:dfe5ae6ea375 7
MichaelW 0:dfe5ae6ea375 8 //not sure whether to make this library and class specific to the spi but code compatible or to make it generic
MichaelW 0:dfe5ae6ea375 9
MichaelW 0:dfe5ae6ea375 10 #ifndef SCP1000_D01_H_
MichaelW 0:dfe5ae6ea375 11 #define SCP1000_D01_H_
MichaelW 0:dfe5ae6ea375 12
MichaelW 0:dfe5ae6ea375 13 #include "mbed.h"
MichaelW 0:dfe5ae6ea375 14 /**
MichaelW 0:dfe5ae6ea375 15 * Class to allow reading of the SCP1000-D01 mems pressure sensor (SPI mode). The class currently only supports High resolution mode.
MichaelW 0:dfe5ae6ea375 16 * This means that the snesor can be read at a maximum rate of 1.8Hz.
MichaelW 0:dfe5ae6ea375 17 */
MichaelW 0:dfe5ae6ea375 18 class SCP1000{
MichaelW 0:dfe5ae6ea375 19 public:
MichaelW 0:dfe5ae6ea375 20
MichaelW 0:dfe5ae6ea375 21 typedef enum SCPModes{HIGHRES,
MichaelW 0:dfe5ae6ea375 22 HIGHSPEED,
MichaelW 0:dfe5ae6ea375 23 ULTRALOWPOWER,
MichaelW 0:dfe5ae6ea375 24 LOWPOWER,
MichaelW 0:dfe5ae6ea375 25 POWERDOWN}SCPMode;
MichaelW 0:dfe5ae6ea375 26
MichaelW 0:dfe5ae6ea375 27
MichaelW 0:dfe5ae6ea375 28 //Constructors - to be Overloaded for different read modes - ie different pins connected up
MichaelW 0:dfe5ae6ea375 29 /**
MichaelW 0:dfe5ae6ea375 30 *Constructor
MichaelW 0:dfe5ae6ea375 31 *
MichaelW 0:dfe5ae6ea375 32 * @param mosi The MOSI pin for the SPI interface
MichaelW 0:dfe5ae6ea375 33 * @param miso The MISO pin for the SPI interface
MichaelW 0:dfe5ae6ea375 34 * @param CSB The Chip select on the SCP1000
MichaelW 0:dfe5ae6ea375 35 */
MichaelW 0:dfe5ae6ea375 36 SCP1000(PinName mosi, PinName miso, PinName sck, PinName CSB);
MichaelW 0:dfe5ae6ea375 37
MichaelW 0:dfe5ae6ea375 38 //Methods
MichaelW 0:dfe5ae6ea375 39 void SetMode(SCPMode mode);
MichaelW 0:dfe5ae6ea375 40
MichaelW 0:dfe5ae6ea375 41 /**
MichaelW 0:dfe5ae6ea375 42 *Read the current Pressure.
MichaelW 0:dfe5ae6ea375 43 *This blocks until the sensor has compelted a reading
MichaelW 0:dfe5ae6ea375 44 *
MichaelW 0:dfe5ae6ea375 45 * @returns The pressure in pascals
MichaelW 0:dfe5ae6ea375 46 */
MichaelW 0:dfe5ae6ea375 47 float read();
MichaelW 0:dfe5ae6ea375 48 /**
MichaelW 0:dfe5ae6ea375 49 * Reads the temperature as measured by the SCP1000.
MichaelW 0:dfe5ae6ea375 50 * This blocks until the sensor has completed a reading
MichaelW 0:dfe5ae6ea375 51 *
MichaelW 0:dfe5ae6ea375 52 *returns The temperature in degrees celsius
MichaelW 0:dfe5ae6ea375 53 */
MichaelW 0:dfe5ae6ea375 54 float readTemperature();
MichaelW 0:dfe5ae6ea375 55
MichaelW 0:dfe5ae6ea375 56
MichaelW 0:dfe5ae6ea375 57
MichaelW 0:dfe5ae6ea375 58 private:
MichaelW 0:dfe5ae6ea375 59 SCPMode _mode;
MichaelW 0:dfe5ae6ea375 60
MichaelW 0:dfe5ae6ea375 61 int _isReady();
MichaelW 0:dfe5ae6ea375 62
MichaelW 0:dfe5ae6ea375 63
MichaelW 0:dfe5ae6ea375 64 //Interfaces
MichaelW 0:dfe5ae6ea375 65 SPI _spi;
MichaelW 0:dfe5ae6ea375 66 DigitalOut _CSB;
MichaelW 0:dfe5ae6ea375 67 // DigitalIn _DRDY; //Interrupt data ready - also need to be able to attach a function to this class
MichaelW 0:dfe5ae6ea375 68 // DigitalOut _TRIG; //Trigger
MichaelW 0:dfe5ae6ea375 69 // DigitalOut _PD; //Power Down
MichaelW 0:dfe5ae6ea375 70
MichaelW 0:dfe5ae6ea375 71
MichaelW 0:dfe5ae6ea375 72 };
MichaelW 0:dfe5ae6ea375 73 #endif