new RF95 driver is written

src/rf95/RF95Interface.cpp

@@ -0,0 +1,132 @@
+#include "RF95Interface.h"
+#include "MeshRadio.h" // kinda yucky, but we need to know which region we are in
+
+#include <configuration.h>
+
+RF95Interface::RF95Interface(RADIOLIB_PIN_TYPE cs, RADIOLIB_PIN_TYPE irq, RADIOLIB_PIN_TYPE rst, SPIClass &spi)
+    : RadioLibInterface(cs, irq, rst, 0, spi)
+{
+    // FIXME - we assume devices never get destroyed
+}
+
+/// Initialise the Driver transport hardware and software.
+/// Make sure the Driver is properly configured before calling init().
+/// \return true if initialisation succeeded.
+bool RF95Interface::init()
+{
+    // FIXME, move this to main
+    SPI.begin();
+
+    applyModemConfig();
+    if (power > 20) // This chip has lower power limits than some
+        power = 20;
+
+    int res;
+    /**
+     * We do a nasty check on freq range to figure our RFM96 vs RFM95
+     */
+    if (CH0 < 500.0) {
+        auto dev = new RFM96(&module);
+        lora = dev;
+        res = dev->begin(freq, bw, sf, cr, syncWord, power, currentLimit, preambleLength);
+    } else {
+        auto dev = new RFM95(&module);
+        lora = dev;
+        res = dev->begin(freq, bw, sf, cr, syncWord, power, currentLimit, preambleLength);
+    }
+
+    DEBUG_MSG("LORA init result %d\n", res);
+
+    if (res == ERR_NONE)
+        res = lora->setCRC(SX126X_LORA_CRC_ON);
+
+    if (res == ERR_NONE)
+        startReceive(); // start receiving
+
+    return res == ERR_NONE;
+}
+
+bool RF95Interface::reconfigure()
+{
+    applyModemConfig();
+
+    // set mode to standby
+    setStandby();
+
+    // configure publicly accessible settings
+    int err = lora->setSpreadingFactor(sf);
+    assert(err == ERR_NONE);
+
+    err = lora->setBandwidth(bw);
+    assert(err == ERR_NONE);
+
+    err = lora->setCodingRate(cr);
+    assert(err == ERR_NONE);
+
+    err = lora->setSyncWord(syncWord);
+    assert(err == ERR_NONE);
+
+    err = lora->setCurrentLimit(currentLimit);
+    assert(err == ERR_NONE);
+
+    err = lora->setPreambleLength(preambleLength);
+    assert(err == ERR_NONE);
+
+    err = lora->setFrequency(freq);
+    assert(err == ERR_NONE);
+
+    if (power > 20) // This chip has lower power limits than some
+        power = 20;
+    err = lora->setOutputPower(power);
+    assert(err == ERR_NONE);
+
+    startReceive(); // restart receiving
+
+    return ERR_NONE;
+}
+
+void RF95Interface::setStandby()
+{
+    int err = lora->standby();
+    assert(err == ERR_NONE);
+
+    isReceiving = false; // If we were receiving, not any more
+    completeSending();   // If we were sending, not anymore
+    disableInterrupt();
+}
+
+void RF95Interface::startReceive()
+{
+    setStandby();
+    int err = lora->startReceive();
+    assert(err == ERR_NONE);
+
+    isReceiving = true;
+
+    // Must be done AFTER, starting transmit, because startTransmit clears (possibly stale) interrupt pending register bits
+    enableInterrupt(isrRxLevel0);
+}
+
+/** Could we send right now (i.e. either not actively receving or transmitting)? */
+bool RF95Interface::canSendImmediately()
+{
+    // We wait _if_ we are partially though receiving a packet (rather than just merely waiting for one).
+    // To do otherwise would be doubly bad because not only would we drop the packet that was on the way in,
+    // we almost certainly guarantee no one outside will like the packet we are sending.
+    bool busyTx = sendingPacket != NULL;
+    bool busyRx = isReceiving && lora->getPacketLength() > 0;
+
+    if (busyTx || busyRx)
+        DEBUG_MSG("Can not set now, busyTx=%d, busyRx=%d\n", busyTx, busyRx);
+
+    return !busyTx && !busyRx;
+}
+
+bool RF95Interface::sleep()
+{
+    // put chipset into sleep mode
+    disableInterrupt();
+    lora->sleep();
+
+    return true;
+}