jim hamblen
This demo uses the application board’s three axis accelerometer and the LCD display working in graphics mode to build an electronic version of a bubble level.
Dependencies: C12832_lcd MMA7660 mbed
Fork of
MMA7660_HelloWorld
by 
Erik -
Revision 1:876f52a697c1, committed 2013-09-22
- Comitter:
- 4180_1
- Date:
- Sun Sep 22 17:44:42 2013 +0000
- Parent:
- 0:bd0546063b0a
- Commit message:
- ver 1.0 see https://mbed.org/users/4180_1/notebook/mbed-application-board-hands-on-demos/
Changed in this revision
| C12832_lcd.lib | Show annotated file Show diff for this revision Revisions of this file |
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r bd0546063b0a -r 876f52a697c1 C12832_lcd.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C12832_lcd.lib Sun Sep 22 17:44:42 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/dreschpe/code/C12832_lcd/#c9afe58d786a
diff -r bd0546063b0a -r 876f52a697c1 main.cpp
--- a/main.cpp Wed Oct 17 16:40:45 2012 +0000
+++ b/main.cpp Sun Sep 22 17:44:42 2013 +0000
@@ -1,21 +1,27 @@
-//Uses the measured z-acceleration to drive leds 2 and 3 of the mbed
-
+//Uses x & y acceleration to simulate a bubble level
+//on the application board LCD display
#include "mbed.h"
#include "MMA7660.h"
-
-MMA7660 MMA(p28, p27);
+#include "C12832_lcd.h"
-DigitalOut connectionLed(LED1);
-PwmOut Zaxis_p(LED2);
-PwmOut Zaxis_n(LED3);
+C12832_LCD lcd; //On board LCD display
+MMA7660 MMA(p28, p27); //I2C Accelerometer
+DigitalOut connectionLed(LED1);//Accel OK LED
-int main() {
+int main()
+{
+ int x=0,y=0;
+ lcd.cls(); //clear LCD screen
if (MMA.testConnection())
- connectionLed = 1;
-
+ connectionLed = 1; //Accelerometer init OK
while(1) {
- Zaxis_p = MMA.z();
- Zaxis_n = -MMA.z();
+ //read X,Y +/-Gs and scale for #display pixels
+ x = (x + MMA.x() * 32.0)/2.0;
+ y = (y -(MMA.y() * 16.0))/2.0;
+ lcd.fillcircle(x+63, y+15, 3, 1); //draw bubble
+ lcd.circle(63, 15, 8, 1);
+ wait(.1); //time delay
+ lcd.fillcircle(x+63, y+15, 3, 0); //erase bubble
}
}