[CC1101] Fixed blocking receive always returning timeout (#348)

examples/CC1101/CC1101_Receive/CC1101_Receive.ino

@@ -77,6 +77,10 @@ void loop() {
     Serial.print(F("[CC1101] LQI:\t\t"));
     Serial.println(radio.getLQI());
 
+  } else if (state == ERR_RX_TIMEOUT) {
+    // timeout occurred while waiting for a packet
+    Serial.println(F("timeout!"));
+
   } else if (state == ERR_CRC_MISMATCH) {
     // packet was received, but is malformed
     Serial.println(F("CRC error!"));

src/modules/CC1101/CC1101.cpp

@@ -144,7 +144,7 @@ int16_t CC1101::receive(uint8_t* data, size_t len) {
   int16_t state = startReceive();
   RADIOLIB_ASSERT(state);
 
-  // wait for sync word or timeout
+  // wait for packet or timeout
   uint32_t start = Module::micros();
   while(!Module::digitalRead(_mod->getIrq())) {
     Module::yield();
@@ -156,18 +156,6 @@ int16_t CC1101::receive(uint8_t* data, size_t len) {
     }
   }
 
-  // wait for packet end or timeout
-  start = Module::micros();
-  while(Module::digitalRead(_mod->getIrq())) {
-    Module::yield();
-
-    if(Module::micros() - start > timeout) {
-      standby();
-      SPIsendCommand(CC1101_CMD_FLUSH_TX);
-      return(ERR_RX_TIMEOUT);
-    }
-  }
-
   // read packet data
   return(readData(data, len));
 }