Revision 0:812825fdf86c, committed 2013-10-27

Comitter:

narendraj9

Date:

Sun Oct 27 09:29:47 2013 +0000

Commit message:

initial commit;

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Oct 27 09:29:47 2013 +0000
@@ -0,0 +1,73 @@
+#include "mbed.h"
+
+/* to test if code loaded properly
+ */
+DigitalOut myled(LED2);
+
+// to power the rf module 
+DigitalOut power(p30);
+DigitalOut powerStatus(LED1);
+
+/* for time division multiplexing.
+ * when an rf tx requires to send signals,
+ * it request the other own operating at the same
+ * freqeuncy to shut itself down. The other module also
+ * follows the same behavioural code!
+ */
+InterruptIn inRequest(p5);
+DigitalOut outRequest(p6);
+
+
+Serial tx(p9, p10); 
+Serial pc(USBTX, USBRX);
+
+// turn RF tx off
+void turnOffRF() { 
+    power = 0;
+    powerStatus = 0;
+}
+
+// turn RF tx on
+void turnOnRF() {
+    power = 1;
+    powerStatus = 1;
+}
+
+// send a request to the other RF tx to kindly shut down
+void sendRequest() {
+    outRequest = 0;
+    wait(0.1);
+    outRequest = 1;
+}
+
+int main() 
+{
+    power = 0; // power to the RF tx
+    powerStatus = 0; // power status of the RF tx
+    myled = 1;
+    char msg[10];
+
+    tx.baud(2400);
+    
+    /* turn RF tx off when requested by the other tx
+     */
+    inRequest.rise(turnOffRF);
+    
+    turnOffRF();
+    
+    /* read messages from the serial port of the computer
+     * and broadcast them
+     */
+    while (1) { 
+        while (pc.readable()) {
+            if (power == 0) {
+                sendRequest(); // send request to the other RF tx to shut itself down.
+                turnOnRF();
+            }
+            msg[0] = pc.getc();
+            tx.putc(msg[0]);
+            pc.putc(msg[0]);
+        }
+       
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Oct 27 09:29:47 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/a9913a65894f
\ No newline at end of file