Diff: MPL115A1.h

Revision:

0:f8ee2a5e377a

Child:

1:b2adf1b62898

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MPL115A1.h	Tue Apr 17 07:44:48 2012 +0000
@@ -0,0 +1,80 @@
+#ifndef MPL115A1_H
+#define MPL115A1_H
+
+#include "mbed.h"
+
+/**  barometric pressure and temperature sensor MPL115A1 control class, based on SPI
+ *
+ * Example:
+ * @code
+ * #include "mbed.h"
+ * #include "MPL115A1.h"
+ * 
+ * SPI spi(p11,p12,p13);
+ * MPL115A1 bar(spi, p14);
+ * 
+ * Serial pc(USBTX, USBRX);
+ * 
+ * int main() {
+ *     while(1) {
+ *         wait(10);
+ *         pc.printf("Pressure is %f\n", bar.readPressure());
+ *         pc.printf("Temperature is %f\n", bar.readTemperature());
+ *     }
+ * }
+ * @endcode
+ */
+
+                         // real addresses, in read_register: address |= 0x80
+#define MPL115A1_PRESH    0x00    // 80
+#define MPL115A1_PRESL    0x02    // 82
+#define MPL115A1_TEMPH    0x04    // 84
+#define MPL115A1_TEMPL    0x06    // 86
+
+#define MPL115A1_A0MSB    0x08    // 88
+#define MPL115A1_A0LSB    0x0A    // 8A
+#define MPL115A1_B1MSB    0x0C    // 8C
+#define MPL115A1_B1LSB    0x0E    // 8E
+#define MPL115A1_B2MSB    0x10    // 90
+#define MPL115A1_B2LSB    0x12    // 92
+#define MPL115A1_C12MSB   0x14    // 94
+#define MPL115A1_C12LSB   0x16    // 96
+#define MPL115A1_C11MSB   0x18    // 98
+#define MPL115A1_C11LSB   0x1A    // 9A
+#define MPL115A1_C22MSB   0x1C    // 9C
+#define MPL115A1_C22LSB   0x1E    // 9E
+
+#define MPL115A1_STARTPRES 0x20 // start pressure measurement
+#define MPL115A1_STARTTEMP 0x22 // start temperature measurement
+#define MPL115A1_STARTBOTH 0x24 // start both simultaneously
+
+class MPL115A1 {
+private:
+    SPI& _spi;
+    DigitalOut _cs; // chip select, active low
+    //DigitalOut sdn; // shutdown pin, high=on, low=off
+    
+public:
+    MPL115A1(SPI& spi, PinName ncs);
+    float readPressure();
+    float readTemperature();
+
+private:
+    void write_register(uint8_t address, char data);
+    char read_register(uint8_t address);
+
+    signed char sia0MSB, sia0LSB;
+    signed char sib1MSB, sib1LSB;
+    signed char sib2MSB, sib2LSB;
+    signed char sic12MSB, sic12LSB;
+    signed char sic11MSB, sic11LSB;
+    signed char sic22MSB, sic22LSB;
+    signed int sia0, sib1, sib2, sic12, sic11, sic22, siPcomp;
+    float decPcomp;
+    signed long lt1, lt2, lt3, si_c11x1, si_a11, si_c12x2;
+    signed long si_a1, si_c22x2, si_a2, si_a1x1, si_y1, si_a2x2;
+    unsigned int uiPadc, uiTadc;
+    unsigned char uiPH, uiPL, uiTH, uiTL;
+};
+
+#endif
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