124 lines
3.1 KiB
C++
124 lines
3.1 KiB
C++
/*
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RadioLib CC1101 Receive with Interrupts Example
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This example listens for FSK transmissions and tries to
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receive them. Once a packet is received, an interrupt is
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triggered.
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*/
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// include the library
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#include <RadioLib.h>
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// CC1101 module is in slot A on the shield
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CC1101 cc = RadioShield.ModuleA;
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void setup() {
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Serial.begin(9600);
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// initialize CC1101 with default settings
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Serial.print(F("[CC1101] Initializing ... "));
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// carrier frequency: 868.0 MHz
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// bit rate: 4.8 kbps
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// Rx bandwidth: 325.0 kHz
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// frequency deviation: 48.0 kHz
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// sync word: 0xD391
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int state = cc.begin();
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if (state == ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code "));
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Serial.println(state);
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while (true);
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}
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// set the function that will be called
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// when new packet is received
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cc.setGdo0Action(setFlag);
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// start listening for packets
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Serial.print(F("[CC1101] Starting to listen ... "));
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state = cc.startReceive();
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if (state == ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code "));
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Serial.println(state);
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while (true);
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}
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// if needed, 'listen' mode can be disabled by calling
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// any of the following methods:
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//
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// cc.standby()
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// cc.sleep()
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// cc.transmit();
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// cc.receive();
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// cc.scanChannel();
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}
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// flag to indicate that a packet was received
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volatile bool receivedFlag = false;
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// disable interrupt when it's not needed
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volatile bool enableInterrupt = true;
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// this function is called when a complete packet
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// is received by the module
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// IMPORTANT: this function MUST be 'void' type
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// and MUST NOT have any arguments!
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void setFlag(void) {
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// check if the interrupt is enabled
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if(!enableInterrupt) {
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return;
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}
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// we got a packet, set the flag
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receivedFlag = true;
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}
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void loop() {
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// check if the flag is set
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if(receivedFlag) {
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// disable the interrupt service routine while
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// processing the data
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enableInterrupt = false;
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// reset flag
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receivedFlag = false;
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// you can read received data as an Arduino String
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String str;
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int state = cc.readData(str);
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// you can also read received data as byte array
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/*
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byte byteArr[8];
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int state = cc.receive(byteArr, 8);
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*/
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if (state == ERR_NONE) {
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// packet was successfully received
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Serial.println("[CC1101] Received packet!");
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// print data of the packet
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Serial.print("[CC1101] Data:\t\t");
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Serial.println(str);
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// print RSSI (Received Signal Strength Indicator)
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// of the last received packet
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Serial.print("[CC1101] RSSI:\t\t");
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Serial.print(cc.getRSSI());
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Serial.println(" dBm");
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// print LQI (Link Quality Indicator)
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// of the last received packet, lower is better
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Serial.print("[CC1101] LQI:\t\t");
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Serial.println(cc.getLQI());
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}
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// we're ready to receive more packets,
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// enable interrupt service routine
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enableInterrupt = true;
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}
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}
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