Robert Abad
/
Lab4_3
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Revision 0:51c3fa0f0a03, committed 2013-10-25
- Comitter:
- rabad1
- Date:
- Fri Oct 25 07:41:52 2013 +0000
- Commit message:
- sinusoid wave generator with input from pot
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 |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Oct 25 07:41:52 2013 +0000
@@ -0,0 +1,26 @@
+#include "mbed.h"
+
+#define INPUT_SCALAR (0.01f)
+
+AnalogIn Ain(p19);
+AnalogOut Aout(p18);
+float i;
+
+int main()
+{
+ while(1) {
+ for (i=0; i<2; i=i+0.05) {
+ Aout=0.5+0.5*sin(i*3.14159); // Compute the sine value, + half the range
+
+ // Controls the sine wave period
+ // NOTE to my fellow students:
+ // in order to get to pot to work as an input to control the frequency,
+ // I've had to scale the setting of the pot. However, I have not had
+ // enough scope time to play with the scalar value to fully understand
+ // the how the pot affects the frequency. So I encourage you to play
+ // the scalar value to get it to work within the desired frequency range
+ wait(Ain*INPUT_SCALAR);
+ }
+ }
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Oct 25 07:41:52 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/a9913a65894f \ No newline at end of file