io_repeater app: Added a comment to explain the ADC reading.

pololu · Jun 22, 2012 · 0842142 · 0842142
1 parent 12d9984
commit 0842142
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/apps/io_repeater/io_repeater.c b/apps/io_repeater/io_repeater.c
@@ -193,6 +193,10 @@ void main(void)
             radioQueueTxSendPacket();
 
             lastTx = getMs();
+
+            // Decide when to send the next packet.  We take a noisy reading of the temperature sensor
+            // to get two random bits, so that we can avoid accidentally getting synchronized with another
+            // transmtiting Wixel.
             txInterval = 7 + (adcRead(14 | ADC_BITS_7) & 3);
         }
     }