Added fixed-length example for CC1101

examples/CC1101/CC1101_Receive_Fixed/CC1101_Receive_Fixed.ino

@@ -0,0 +1,98 @@
+/*
+   RadioLib CC1101 Receive Example (fixed length mode)
+
+   This example receives packets using CC1101 FSK radio module.
+   To successfully receive data, the following settings have to be the same
+   on both transmitter and receiver:
+    - carrier frequency
+    - bit rate
+    - frequency deviation
+    - sync word
+
+   For full API reference, see the GitHub Pages
+   https://jgromes.github.io/RadioLib/
+*/
+
+// receive 9 bytes of payload after the sync word
+#define FIXED_PKT_LEN 9
+
+// include the library
+#include <RadioLib.h>
+
+// CC1101 has the following connections:
+// NSS pin:   10
+// GDO0 pin:  2
+// GDO2 pin:  3
+CC1101 cc = new Module(10, 2, 3);
+
+// or using RadioShield
+// https://github.com/jgromes/RadioShield
+//CC1101 cc = RadioShield.ModuleA;
+
+void setup() {
+  Serial.begin(9600);
+
+  // initialize CC1101 with default settings
+  Serial.print(F("[CC1101] Initializing ... "));
+  // carrier frequency:                   868.0 MHz
+  // bit rate:                            4.8 kbps
+  // Rx bandwidth:                        325.0 kHz
+  // frequency deviation:                 48.0 kHz
+  // sync word:                           0xD391
+  int state = cc.begin();
+
+  // Fixed packet length mode (non-default setting)
+  state = cc.fixedPacketLengthMode(FIXED_PKT_LEN);
+
+  if (state == ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while (true);
+  }
+}
+
+void loop() {
+  Serial.print(F("[CC1101] Waiting for incoming transmission ... "));
+
+  // you can receive data as an Arduino String
+  String str;
+  int state = cc.receive(str);
+
+  // you can also receive data as byte array
+  /*
+    byte byteArr[8];
+    int state = cc.receive(byteArr, 8);
+  */
+
+  if (state == ERR_NONE) {
+    // packet was successfully received
+    Serial.println(F("success!"));
+
+    // print the data of the packet
+    Serial.print(F("[CC1101] Data:\t\t"));
+    Serial.println(str);
+
+    // print RSSI (Received Signal Strength Indicator)
+    // of the last received packet
+    Serial.print(F("[CC1101] RSSI:\t\t"));
+    Serial.print(cc.getRSSI());
+    Serial.println(F(" dBm"));
+
+    // print LQI (Link Quality Indicator)
+    // of the last received packet, lower is better
+    Serial.print(F("[CC1101] LQI:\t\t"));
+    Serial.println(cc.getLQI());
+
+  } else if (state == ERR_CRC_MISMATCH) {
+    // packet was received, but is malformed
+    Serial.println(F("CRC error!"));
+
+  } else {
+    // some other error occurred
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+
+  }
+}