Diff: main.cpp

Revision:

0:865c8c06113f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Mar 16 11:17:05 2011 +0000
@@ -0,0 +1,77 @@
+#include "mbed.h"
+#include "TextLCD.h"
+
+
+I2C i2c(p9, p10);
+Serial pc(USBTX, USBRX); // tx, rx
+
+//LCD EA DOGM162x-A
+TextLCD lcd(p15, p16, p17, p18, p19, p21); // rs, e, d4-d7
+ 
+BusOut leds(LED1, LED2, LED3, LED4);
+
+int i;
+
+int main() {
+
+    char address;
+    short xvalue;
+    short yvalue;
+    short zvalue;
+    float f_xvalue,f_yvalue;
+        
+    char data[6];
+    
+    lcd.printf("Bosch BMA020\nAccelerometer");
+    
+    wait (2);
+    lcd.cls();
+        
+    while(1) {
+        
+        address = 0x70;             // write address
+        data[0] = 0x02;             // register address
+        i2c.write(address, data, 1);
+        address = 0x71;             // read address, read 6 bytes automatically
+        i2c.read(address, data, 6); 
+        
+        xvalue=data[0]>>6;
+        xvalue+=(short)data[1]<<2;
+        
+        yvalue=data[2]>>6;
+        yvalue+=(short)data[3]<<2;
+
+        zvalue=data[4]>>6;
+        zvalue+=(short)data[5]<<2;
+
+        pc.printf("%4d%4d%4d\n", xvalue, yvalue, zvalue); // write to serial port (9600 Baud)
+        
+        xvalue<<=6;
+        xvalue/=64;
+        f_xvalue=xvalue;
+        f_xvalue*=0.004;   
+        
+        yvalue<<=6;
+        yvalue/=64;
+        f_yvalue=yvalue;
+        f_yvalue*=0.004;     
+                                
+        lcd.locate(0,0);
+        lcd.printf("X=%+1.2f Y=%+1.2f", f_xvalue, f_yvalue);
+                
+        lcd.locate(0,1);
+        lcd.printf("                ");
+        if (data[1]<16)                     // visualize x value like spirit level device
+        {
+            lcd.locate(15-data[1],1);
+            lcd.printf("O");
+        }
+        
+        
+       
+        
+        if (data[2]&&0x01) leds = 1 << data[3]+2; // neue Daten?
+
+        wait (0.1);
+    }
+}