Merge pull request #279 from rfquack/master

New .gitignore pattern, CC1101 streaming mode, RF69 SPI get/set/read/write overrides

.gitignore

@@ -11,3 +11,6 @@
 # Debug decoder
 extras/decoder/log.txt
 extras/decoder/out.txt
+
+# PlatformIO
+.pio*

src/modules/CC1101/CC1101.cpp

@@ -262,19 +262,32 @@ int16_t CC1101::startTransmit(uint8_t* data, size_t len, uint8_t addr) {
   int16_t state = SPIsetRegValue(CC1101_REG_IOCFG0, CC1101_GDOX_SYNC_WORD_SENT_OR_RECEIVED);
   RADIOLIB_ASSERT(state);
 
+  // data put on FIFO.
+  uint8_t dataSent = 0;
+
   // optionally write packet length
   if (_packetLengthConfig == CC1101_LENGTH_CONFIG_VARIABLE) {
+
+    // enforce variable len limit.
+    if (len > CC1101_MAX_PACKET_LENGTH - 1) {
+      return (ERR_PACKET_TOO_LONG);
+    }
+
     SPIwriteRegister(CC1101_REG_FIFO, len);
+    dataSent += 1;
   }
 
   // check address filtering
   uint8_t filter = SPIgetRegValue(CC1101_REG_PKTCTRL1, 1, 0);
   if(filter != CC1101_ADR_CHK_NONE) {
     SPIwriteRegister(CC1101_REG_FIFO, addr);
+    dataSent += 1;
   }
 
-  // write packet to FIFO
-  SPIwriteRegisterBurst(CC1101_REG_FIFO, data, len);
+  // fill the FIFO.
+  uint8_t initialWrite = min((uint8_t)len, (uint8_t)(CC1101_FIFO_SIZE - dataSent));
+  SPIwriteRegisterBurst(CC1101_REG_FIFO, data, initialWrite);
+  dataSent += initialWrite;
 
   // set RF switch (if present)
   _mod->setRfSwitchState(LOW, HIGH);
@@ -282,6 +295,28 @@ int16_t CC1101::startTransmit(uint8_t* data, size_t len, uint8_t addr) {
   // set mode to transmit
   SPIsendCommand(CC1101_CMD_TX);
 
+  // keep feeding the FIFO until the packet is over.
+  while (dataSent < len) {
+    // get number of bytes in FIFO.
+    uint8_t bytesInFIFO = SPIgetRegValue(CC1101_REG_TXBYTES, 6, 0);
+
+    // if there's room then put other data.
+    if (bytesInFIFO < CC1101_FIFO_SIZE) {
+      uint8_t bytesToWrite = min((uint8_t)(CC1101_FIFO_SIZE - bytesInFIFO), (uint8_t)(len - dataSent));
+      SPIwriteRegisterBurst(CC1101_REG_FIFO, &data[dataSent], bytesToWrite);
+      dataSent += bytesToWrite;
+    } else {
+      // wait for radio to send some data.
+      /*
+        * Does this work for all rates? If 1 ms is longer than the 1ms delay
+        * then the entire FIFO will be transmitted during that delay.
+        * 
+        * TODO: test this on real hardware
+      */
+     delayMicroseconds(250);
+    }
+  }
+
   return (state);
 }
 
@@ -292,8 +327,9 @@ int16_t CC1101::startReceive() {
   // flush Rx FIFO
   SPIsendCommand(CC1101_CMD_FLUSH_RX);
 
-  // set GDO0 mapping
-  int state = SPIsetRegValue(CC1101_REG_IOCFG0, CC1101_GDOX_SYNC_WORD_SENT_OR_RECEIVED);
+  // set GDO0 mapping: Asserted when RX FIFO > 4 bytes.
+  int16_t state = SPIsetRegValue(CC1101_REG_IOCFG0, CC1101_GDOX_RX_FIFO_FULL_OR_PKT_END);
+  state |= SPIsetRegValue(CC1101_REG_FIFOTHR, CC1101_FIFO_THR_TX_61_RX_4, 3, 0);
   RADIOLIB_ASSERT(state);
 
   // set RF switch (if present)
@@ -309,7 +345,7 @@ int16_t CC1101::readData(uint8_t* data, size_t len) {
   // get packet length
   size_t length = len;
   if (len == CC1101_MAX_PACKET_LENGTH) {
-    length = getPacketLength();
+    length = getPacketLength(true);
   }
 
   // check address filtering
@@ -318,9 +354,45 @@ int16_t CC1101::readData(uint8_t* data, size_t len) {
     SPIreadRegister(CC1101_REG_FIFO);
   }
 
-  // read packet data
-  SPIreadRegisterBurst(CC1101_REG_FIFO, length, data);
+  uint8_t bytesInFIFO = SPIgetRegValue(CC1101_REG_RXBYTES, 6, 0);
+  size_t readBytes = 0;
+  uint32_t lastPop = millis();
 
+  // keep reading from FIFO until we get all the packet.
+  while (readBytes < length) {
+    if (bytesInFIFO == 0) {
+      if (millis() - lastPop > 5) {
+        // readData was required to read a packet longer than the one received.
+        RADIOLIB_DEBUG_PRINTLN(F("No data for more than 5mS. Stop here."));
+        break;
+      } else {
+        /*
+         * Does this work for all rates? If 1 ms is longer than the 1ms delay
+         * then the entire FIFO will be transmitted during that delay.
+         * 
+         * TODO: drop this delay(1) or come up with a better solution:
+        */
+        delay(1);
+        bytesInFIFO = SPIgetRegValue(CC1101_REG_RXBYTES, 6, 0);
+        continue;
+      }
+    }
+
+    // read the minimum between "remaining length" and bytesInFifo
+    uint8_t bytesToRead = min((uint8_t)(length - readBytes), bytesInFIFO);
+    SPIreadRegisterBurst(CC1101_REG_FIFO, bytesToRead, &(data[readBytes]));
+    readBytes += bytesToRead;
+    lastPop = millis();
+
+    // Get how many bytes are left in FIFO.
+    bytesInFIFO = SPIgetRegValue(CC1101_REG_RXBYTES, 6, 0);
+  }
+
+  // check if status bytes are enabled (default: CC1101_APPEND_STATUS_ON)
+  bool isAppendStatus = SPIgetRegValue(CC1101_REG_PKTCTRL1, 2, 2) == CC1101_APPEND_STATUS_ON;
+
+  // If status byte is enabled at least 2 bytes (2 status bytes + any following packet) will remain in FIFO.
+  if (bytesInFIFO >= 2 && isAppendStatus) {
     // read RSSI byte
     _rawRSSI = SPIgetRegValue(CC1101_REG_FIFO);
 
@@ -328,18 +400,23 @@ int16_t CC1101::readData(uint8_t* data, size_t len) {
   uint8_t val = SPIgetRegValue(CC1101_REG_FIFO);
   _rawLQI = val & 0x7F;
 
-  // flush Rx FIFO
-  SPIsendCommand(CC1101_CMD_FLUSH_RX);
+    // check CRC
+    if (_crcOn && (val & CC1101_CRC_OK) == CC1101_CRC_ERROR) {
+      return (ERR_CRC_MISMATCH);
+    }
+  }
 
   // clear internal flag so getPacketLength can return the new packet length
   _packetLengthQueried = false;
 
+  // Flush then standby according to RXOFF_MODE (default: CC1101_RXOFF_IDLE)
+  if (SPIgetRegValue(CC1101_REG_MCSM1, 3, 2) == CC1101_RXOFF_IDLE) {
+
+    // flush Rx FIFO
+    SPIsendCommand(CC1101_CMD_FLUSH_RX);
+
     // set mode to standby
     standby();
-
-  // check CRC
-   if (_crcOn && (val & 0b10000000) == 0b00000000) {
-    return (ERR_CRC_MISMATCH);
   }
 
   return(ERR_NONE);
@@ -609,7 +686,6 @@ int16_t CC1101::setOOK(bool enableOOK) {
     state = SPIsetRegValue(CC1101_REG_FREND0, 1, 2, 0);
     RADIOLIB_ASSERT(state);
 
-
     // update current modulation
     _modulation = CC1101_MOD_FORMAT_ASK_OOK;
   } else {
@@ -628,7 +704,6 @@ int16_t CC1101::setOOK(bool enableOOK) {
   return(setOutputPower(_power));
 }
 
-
 float CC1101::getRSSI() const {
   float rssi;
   if(_rawRSSI >= 128) {
@@ -715,9 +790,15 @@ int16_t CC1101::setPromiscuousMode(bool promiscuous) {
     state = setCrcFiltering(true);
   }
 
+  _promiscuous = promiscuous;
+  
   return(state);
 }
 
+bool CC1101::getPromiscuousMode() {
+  return (_promiscuous);
+}
+
 int16_t CC1101::setDataShaping(uint8_t sh) {
   // set mode to standby
   int16_t state = standby();

src/modules/CC1101/CC1101.h

@@ -8,9 +8,10 @@
 
 // CC1101 physical layer properties
 #define CC1101_FREQUENCY_STEP_SIZE                    396.7285156
-#define CC1101_MAX_PACKET_LENGTH                      63
+#define CC1101_MAX_PACKET_LENGTH                      255
 #define CC1101_CRYSTAL_FREQ                           26.0
 #define CC1101_DIV_EXPONENT                           16
+#define CC1101_FIFO_SIZE                              64
 
 // CC1101 SPI commands
 #define CC1101_CMD_READ                               0b10000000
@@ -168,7 +169,7 @@
 #define CC1101_RX_ATTEN_6_DB                          0b00010000  //  5     4                     6 dB
 #define CC1101_RX_ATTEN_12_DB                         0b00100000  //  5     4                     12 dB
 #define CC1101_RX_ATTEN_18_DB                         0b00110000  //  5     4                     18 dB
-#define CC1101_FIFO_THR                               0b00000111  //  5     4     Rx FIFO threshold [bytes] = CC1101_FIFO_THR * 4; Tx FIFO threshold [bytes] = 65 - (CC1101_FIFO_THR * 4)
+#define CC1101_FIFO_THR_TX_61_RX_4                    0b00000000  //  3     0     TX fifo threshold: 61, RX fifo threshold: 4
 
 // CC1101_REG_SYNC1
 #define CC1101_SYNC_WORD_MSB                          0xD3        //  7     0     sync word MSB
@@ -599,9 +600,9 @@ class CC1101: public PhysicalLayer {
 
       \param func ISR to call.
 
-      \param dir Signal change direction. Defaults to FALLING.
+      \param dir Signal change direction. Defaults to RISING.
     */
-    void setGdo0Action(void (*func)(void), RADIOLIB_INTERRUPT_STATUS dir = FALLING);
+    void setGdo0Action(void (*func)(void), RADIOLIB_INTERRUPT_STATUS dir = RISING);
 
     /*!
       \brief Clears interrupt service routine to call when GDO0 activates.
@@ -846,6 +847,13 @@ class CC1101: public PhysicalLayer {
     */
     int16_t setPromiscuousMode(bool promiscuous = true);
 
+     /*!
+      \brief Get whether the modem is in promiscuous mode: no packet filtering (e.g., no preamble, sync word, address, CRC).
+
+      \returns Whether the modem is in promiscuous mode
+    */
+    bool getPromiscuousMode();
+
     /*!
       \brief Sets Gaussian filter bandwidth-time product that will be used for data shaping.
       Allowed value is RADIOLIB_SHAPING_0_5. Set to RADIOLIB_SHAPING_NONE to disable data shaping.

src/modules/RF69/RF69.cpp

@@ -407,6 +407,9 @@ int16_t RF69::setFrequency(float freq) {
   _mod->SPIwriteRegister(RF69_REG_FRF_MSB, (FRF & 0xFF0000) >> 16);
   _mod->SPIwriteRegister(RF69_REG_FRF_MID, (FRF & 0x00FF00) >> 8);
   _mod->SPIwriteRegister(RF69_REG_FRF_LSB, FRF & 0x0000FF);
+
+  _freq = freq;
+
   return(ERR_NONE);
 }
 

src/modules/RF69/RF69.h

@@ -878,6 +878,7 @@ class RF69: public PhysicalLayer {
   protected:
 #endif
 
+    float _freq = 0;
     float _br = 0;
     float _rxBw = 0;
     bool _ook = false;