Diff: main.cpp

Revision:

0:c73e35945f19

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Jul 02 15:12:39 2015 +0000
@@ -0,0 +1,90 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <string.h>
+#include "mbed.h"
+#include "BMP180.h"
+#include "Si7020.h"
+
+// User I/O objects
+DigitalOut red(LED_RED, LED_OFF);
+
+// Sensor objects
+I2C i2c(I2C_SDA, I2C_SCL);
+AnalogIn light_ain(AIN_0D);
+DigitalOut light_en(P0_2, 1);
+
+BMP180 bmp180(&i2c);
+Si7020 si7020(&i2c);
+
+int currentPressure;
+float currentHumidity;
+float currentTemperature;
+float currentLight;
+
+// *****************************************************************************
+int main(void)
+{
+    printf("\n\nEnvironmental sensor demo\n");
+
+    /* Setup BMP180 */
+    while(bmp180.init() != 0) {
+        printf("Failed to initialize barometer\n");
+        wait(1);
+    }
+
+    while (true) {
+
+        // Start non-blocking readings
+        bmp180.startPressure(BMP180::STANDARD);
+        si7020.startHumidity();
+
+        // Toggle LED and wait between readings
+        red = 1;
+        wait(1);
+        red = 0;
+    
+        // Enable light sensor to charge capacitor
+        light_en = 0;
+        
+        // Get Pressure
+        if(bmp180.getPressure(&currentPressure) != 0) {
+            printf("Error getting pressure\n");
+        }
+
+        // Get Humidity
+        if(si7020.checkHumidity(&currentHumidity) != 0) {
+            printf("Error getting humidity\n");
+        }
+
+        // Get temperature
+        if(si7020.getPrevTemperature(&currentTemperature) != 0) {
+            printf("Error getting temperature\n");
+        }
+
+        // Get light 
+        currentLight = light_ain.read();
+        
+        // Disable light sensor
+        light_en = 1;
+        
+        printf("Press = %0.1f kPa\n", (float)(currentPressure/1000.0));
+        printf("Humid = %0.1f %%\n", currentHumidity);
+        printf("Temp = %0.1f C\n", currentTemperature);
+        printf("Light = %0.1f %% \n", currentLight*100.0f);
+        printf("\n");
+    }
+}