Dan Minear
My first program to create a chase pattern with the on-board LEDs, but this uses the concept of a rotating phasor and pulse width modulation to dim the LEDs.
Revision 0:cf65b0672fcd, committed 2010-11-30
- Comitter:
- dminear
- Date:
- Tue Nov 30 15:05:44 2010 +0000
- Commit message:
- Initial release
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
diff -r 000000000000 -r cf65b0672fcd main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Nov 30 15:05:44 2010 +0000
@@ -0,0 +1,43 @@
+/* Chase pattern using a rotating phasor
+ * Dan Minear
+ * 2010-11-20
+*/
+
+#include "mbed.h"
+#include "math.h"
+
+Serial pc(USBTX, USBRX); // tx, rx
+PwmOut led1(LED1);
+PwmOut led2(LED2);
+PwmOut led3(LED3);
+PwmOut led4(LED4);
+
+float brightness = 0.0;
+float factor = 0.01;
+
+int main() {
+ pc.printf("\nPress 'u' or 'd'\n");
+ char c;
+ float angle = 0;
+ float factor = 0.01;
+
+ while(1) {
+ if (pc.readable()) {
+ c = pc.getc();
+ if (c == 'u') { factor += 0.01; }
+ if (c =='d') { factor -= 0.01; }
+ }
+ angle += factor;
+ if (angle > 2 * 3.14159 ) { angle = 0; }
+
+ led1 = (sin(angle) / 2)/2;
+ led2 = (sin(angle + 3.1416 / 4))/2;
+ led3 = (sin(angle + 3.1416 / 2))/2;
+ led4 = (sin(angle + 3.1416 * 3 / 4))/2;
+
+ wait(0.01);
+ }
+}
+
+
+
diff -r 000000000000 -r cf65b0672fcd mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Nov 30 15:05:44 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e