Diff: LPS25H.cpp

Revision:

0:0d2babe81a04

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LPS25H.cpp	Sun Oct 12 02:42:32 2014 +0000
@@ -0,0 +1,83 @@
+//**********************
+// LPS25H.cpp for mbed
+//
+// LPS25H lps25h(P0_5,P0_4);
+// or
+// I2C i2c(P0_5,P0_4);
+// LPS25H lps25h(i2c);
+//
+// (C)Copyright 2014 All rights reserved by Y.Onodera
+// http://einstlab.web.fc2.com
+//**********************
+
+#include "mbed.h"
+#include "LPS25H.h"
+
+LPS25H::LPS25H (PinName sda, PinName scl) : _i2c(sda, scl) {
+    init();
+}
+LPS25H::LPS25H (I2C& p_i2c) : _i2c(p_i2c) {
+    init();
+}
+
+void LPS25H::put(unsigned char a, unsigned char b)
+{
+    buf[0]=a;
+    buf[1]=b;
+    _i2c.write(LPS25H_ADDR, buf, 2);
+}
+
+
+void LPS25H::get(unsigned char a)
+{
+    buf[0] = a;
+    _i2c.write(LPS25H_ADDR, buf, 1, true); // no stop, repeated
+    _i2c.read( LPS25H_ADDR, buf, 1);
+
+}
+
+long LPS25H::pressure()
+{
+
+    // XL first and H last
+    // get press_xl
+    get(LPS25H_PRESS_POUT_XL_REH);
+    press.byte.LB=buf[0];
+    // get tpress_low
+    get(LPS25H_PRESS_OUT_L);
+    press.byte.HB=buf[0];
+    // get press_high
+    get(LPS25H_PRESS_OUT_H);
+    press.byte.UB=buf[0];
+    return press.Val;
+ 
+    // hPa = press.Val / 4096
+    // Pa = press.Val / 40.96   
+}
+
+
+short LPS25H::temperature()
+{
+
+    // L first and H last
+    // get tpress_low
+    get(LPS25H_TEMP_OUT_L);
+    temp.byte.LB=buf[0];
+    // get press_high
+    get(LPS25H_TEMP_OUT_H);
+    temp.byte.HB=buf[0];
+    return temp.S;
+ 
+    // C = 42.5 + temp.S / 480
+    // range:0 to 80C
+    // accuracy:+-2C
+}
+
+
+void LPS25H::init()
+{
+    // Power ON Cycle=1Hz
+    put(LPS25H_CTRL_REG1, 0x90);
+}
+
+