Revision 0:4429ab6153c1, committed 2011-04-23

Comitter:

ssozonoff

Date:

Sat Apr 23 19:11:56 2011 +0000

Commit message:

Basic testing of the SHT21 library

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SHT2x.lib	Sat Apr 23 19:11:56 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/ssozonoff/code/SHT2x/#2464fed17980

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Apr 23 19:11:56 2011 +0000
@@ -0,0 +1,41 @@
+#include "mbed.h"
+#include "SHT2x.h"
+
+SHT2x sht21(p9, p10);
+
+DigitalOut myled(LED2);
+Serial pc(USBTX, USBRX);
+
+int rh, temp;
+int error;
+float relHumidity, temperature;
+int userRegister;
+
+int main() {
+    sht21.SHT2x_SoftReset();
+    
+    error |= sht21.SHT2x_ReadUserRegister(&userRegister);  //get actual user reg
+    userRegister = (userRegister & ~SHT2x_RES_MASK) | SHT2x_RES_12_14BIT;
+    error |= sht21.SHT2x_WriteUserRegister(&userRegister); //write changed user reg    
+    
+    while (1) {
+        myled = 1;
+        
+        pc.printf("program start\r\n");
+        error |= sht21.SHT2x_MeasureHM(HUMIDITY, &rh);
+        error |= sht21.SHT2x_MeasureHM(TEMP, &temp);
+        
+        if (error > 0)
+            pc.printf("error code %d \r\n", error);
+
+        relHumidity = sht21.SHT2x_CalcRH(rh);
+        temperature = sht21.SHT2x_CalcTemperatureC(temp);
+        
+        pc.printf("RH value -> %f \r\n", relHumidity);
+        pc.printf("Temp in C -> %f \r\n", temperature);
+        pc.printf("Dew point %f \r\n", sht21.SHT2x_GetDewpoint(relHumidity, temperature));
+
+        myled = 0;
+        wait(1);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Apr 23 19:11:56 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912