Diff: main.cpp

Revision:

1:7008e7b00996

Parent:

0:9ce639d07eeb

--- a/main.cpp	Fri Aug 08 01:03:08 2014 +0000
+++ b/main.cpp	Mon Aug 11 13:50:16 2014 +0000
@@ -6,12 +6,6 @@
 Autor: Mario Baldini <mario@baldini.systems>
 2014/08
 
-!!! NOT WORKING !!!
-This reference program for Arduino DO work: http://hastebin.com/tilolukave.go
-
-If you locate the error in this mbed version, 
-please e-mail me at mario@baldini.systems
-
 Reading the output (in linux): sudo screen /dev/ttyACM0 115200
 
 
@@ -24,80 +18,39 @@
 
 
 int main() {
+    
     pc.baud(115200);
-    pc.printf("begin\r\n");
 
-    int address = 0x28;
+    i2c.frequency(400000);
+    char wake_cmd[3];
     char data[4];
-    data[0] = 0x00;   
-    data[1] = 0x00;
-    data[2] = 0x00;
-    data[3] = 0x00;
-    
-    char data_write[3];
-    data_write[0] = 0xA0;
-    data_write[1] = 0x00;
-    data_write[2] = 0x00;
-    
-    
-    i2c.frequency(400000);
-
+    float humidity;
+    float temperatureC;
+    const int addr = 0x28 << 1;
 
     while(true) {
-        pc.printf("loop()\r\n");
+
         data[0] = 0x00;   
         data[1] = 0x00;
         data[2] = 0x00;
         data[3] = 0x00;
+
+        wake_cmd[0] = 0xA0;
+        wake_cmd[1] = 0x00;
+        wake_cmd[1] = 0x00;
+        i2c.write(addr, wake_cmd, 3);
     
-        
-        //  TRY 1      
-        i2c.start();
-        i2c.write(address, data_write, 3);
-        wait_ms(50);
-        i2c.stop();
-        
-        i2c.start();
-        i2c.read(address, data, 4);
-        i2c.stop();
-        
-        pc.printf("Ver.1 Data[]\t 0x%X   0x%X   0x%X   0x%X \r\n\n", data[0],data[1],data[2],data[3]);
-        
-        
-        
-        
-        // TRY 2
-        i2c.start();
-        i2c.write(0xA0);
-        i2c.write(0x00);
-        i2c.write(0x00);
-        i2c.stop();
-        wait_ms(50);
-        
-        i2c.start();
-        i2c.read(address, data, 4);
-        i2c.stop();
-        pc.printf("Ver.2 Data[]\t 0x%X   0x%X   0x%X   0x%X \r\n\n", data[0],data[1],data[2],data[3]);
-        
-
-
-        // TRY 3
-        i2c.write(address, data_write, 3);
-        i2c.write(0xA0);
-        i2c.write(0x00);
-        i2c.write(0x00);
         wait_ms(50);
         
         
-        i2c.read(address, data, 4);
-        data[0] = i2c.read(0x01);
-        data[1] = i2c.read(0x01);
-        data[2] = i2c.read(0x00);
-        data[3] = i2c.read(0x00);
-        pc.printf("Ver.3 Data[]\t 0x%X   0x%X   0x%X   0x%X \r\n\n", data[0],data[1],data[2],data[3]);
+        i2c.read(addr, data, 4);
+        
+        pc.printf("Raw Data[]\t 0x%X   0x%X   0x%X   0x%X \r\n", data[0],data[1],data[2],data[3]);
 
-        
-        
-        wait_ms(2000);
+        humidity = (((data[0] & 63) << 8) + data[1]) / 163.84;
+        temperatureC = (((data[2] << 6) + (data[3] / 4)) / 99.29) - 40; 
+        pc.printf("Humidity: %.2f \t Temperature (C): %.2f \r\n\n", humidity, temperatureC);
+
+        wait_ms(1000);
     }
 }