fix unsigned multiplication

diff --git a/tos/chips/rf230/LowPowerListeningLayerP.nc b/tos/chips/rf230/LowPowerListeningLayerP.nc
index 8b4876daf702a66d2553c9431a5d070f077fc9cd..502820d0e2d38faeeb02534b8aa05daf3b513768 100644 (file)
--- a/tos/chips/rf230/LowPowerListeningLayerP.nc
+++ b/tos/chips/rf230/LowPowerListeningLayerP.nc
@@ -52,13 +52,13 @@ implementation
        enum
        {
                // minimum wakeup time to catch a transmission in milliseconds
-               LISTEN_WAKEUP = 6,      // use xxxL if LISTEN_WAKEUP * 10000 > 65535
+               LISTEN_WAKEUP = 6U,     // use xxxL if LISTEN_WAKEUP * 10000 > 65535
 
                // extra wakeup time after receiving a message in milliseconds
-               AFTER_RECEIVE = 10,
+               AFTER_RECEIVE = 10U,
 
                // extra wakeup time after transmitting a message in milliseconds
-               AFTER_TRANSMIT = 10,
+               AFTER_TRANSMIT = 10U,
 
                MIN_SLEEP = 2,          // the minimum sleep interval in milliseconds
                MAX_SLEEP = 30000,      // the maximum sleep interval in milliseconds
@@ -308,6 +308,8 @@ implementation
                txMsg = msg;
                txLen = len;
                txError = FAIL;
+
+               return SUCCESS;
        }
 
        command error_t Send.cancel(message_t* msg)
@@ -366,7 +368,7 @@ implementation
                else if( dutyCycle <= MIN_DUTY  )
                        return MAX_SLEEP;
 
-               return ((10000 * LISTEN_WAKEUP) / dutyCycle) - LISTEN_WAKEUP;
+               return ((10000U * LISTEN_WAKEUP) / dutyCycle) - LISTEN_WAKEUP;
        }
 
        command uint16_t LowPowerListening.sleepIntervalToDutyCycle(uint16_t interval)
@@ -376,7 +378,7 @@ implementation
                else if( interval >= MAX_SLEEP )
                        return MIN_DUTY;
 
-               return (10000 * LISTEN_WAKEUP) / (LISTEN_WAKEUP + interval);
+               return (10000U * LISTEN_WAKEUP) / (LISTEN_WAKEUP + interval);
        }
 
        command void LowPowerListening.setLocalSleepInterval(uint16_t interval)