jim hamblen
RF link test program using low cost modules from Sparkfun See http://mbed.org/users/4180_1/notebook/ir-and-rf-remote-controls/
Revision 0:a4f7b521f1ce, committed 2012-02-10
- Comitter:
- 4180_1
- Date:
- Fri Feb 10 02:33:58 2012 +0000
- Commit message:
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 Feb 10 02:33:58 2012 +0000
@@ -0,0 +1,35 @@
+#include "mbed.h"
+
+Serial pc(USBTX, USBRX); // tx, rx
+Serial device(p9, p10); // tx, rx
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+//RF link demo using low-cost Sparkfun RF transmitter and receiver modules
+//LEDs indicate link activity
+//Characters typed in PC terminal windows will echo back using RF link
+int main() {
+ char temp=0;
+ device.baud(2400);
+ while (1) {
+
+ //RF Transmit Code
+ if (pc.readable()==0) {
+ myled1 = 1;
+ //Send 10101010 pattern when idle to keep receiver in sync and locked to transmitter
+ //When receiver loses the sync lock (Around 30MS with no data change seen) it starts sending out noise
+ device.putc(0xAA);
+ myled1 = 0;
+ } else
+ //Send out the real data whenever a key is typed
+ device.putc(pc.getc());
+
+ //RF Receive Code
+ if (device.readable()) {
+ myled2 = 1;
+ temp=device.getc();
+ //Ignore Sync pattern and do not pass on to PC
+ if (temp!=0xAA) pc.putc(temp);
+ myled2 = 0;
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Feb 10 02:33:58 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/14f4805c468c