new receive code works a little better

docs/software/nrf52-TODO.md

@@ -9,7 +9,10 @@ Minimum items needed to make sure hardware is good.
 - DONE basic test of BLE
 - DONE get a debug 'serial' console working via the ICE passthrough feature
 - add a hard fault handler
-- switch to RadioLab? test it with current radio. https://github.com/jgromes/RadioLib
+- DONE switch to RadioLab? test it with current radio. https://github.com/jgromes/RadioLib
+- change rx95 to radiolib
+- track rxbad, rxgood, txgood
+- neg 7 error code from receive
 - at boot we are starting our message IDs at 1, rather we should start them at a random number. also, seed random based on timer. this could be the cause of our first message not seen bug
 - use SX126x::startReceiveDutyCycleAuto to save power by sleeping and briefly waking to check for preamble bits. Change xmit rules to have more preamble bits.
 - use "variants" to get all gpio bindings
@@ -51,6 +54,7 @@ Needed to be fully functional at least at the same level of the ESP32 boards. At
 
 ## Items to be 'feature complete'
 
+- remove the MeshRadio wrapper - we don't need it anymore, just do everythin in RadioInterface subclasses.
 - figure out what the correct current limit should be for the sx1262, currently we just use the default 100
 - put sx1262 in sleepmode when processor gets shutdown (or rebooted), ideally even for critical faults (to keep power draw low). repurpose deepsleep state for this.
 - good power management tips: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/optimizing-power-on-nrf52-designs

src/GPS.cpp

@@ -110,7 +110,7 @@ void GPS::perhapsSetRTC(const struct timeval *tv)
 #ifndef NO_ESP32
         settimeofday(tv, NULL);
 #else
-        assert(0);
+        DEBUG_MSG("ERROR TIME SETTING NOT IMPLEMENTED!\n");
 #endif
         readFromRTC();
     }

src/rf95/RadioLibInterface.cpp

@@ -124,16 +124,24 @@ void RadioLibInterface::handleTransmitInterrupt()
 {
     assert(sendingPacket); // Were we sending?
 
-    // FIXME - check result code from ISR
+    completeSending();
+}
 
+void RadioLibInterface::completeSending()
+{
+    if (sendingPacket) {
         // We are done sending that packet, release it
         packetPool.release(sendingPacket);
         sendingPacket = NULL;
         // DEBUG_MSG("Done with send\n");
     }
+}
 
 void RadioLibInterface::handleReceiveInterrupt()
 {
+    assert(isReceiving);
+    isReceiving = false;
+
     // read the number of actually received bytes
     size_t length = iface.getPacketLength();
 
@@ -179,4 +187,3 @@ void RadioLibInterface::startSend(MeshPacket *txp)
     // Must be done AFTER, starting transmit, because startTransmit clears (possibly stale) interrupt pending register bits
     enableInterrupt(isrTxLevel0);
 }
-

src/rf95/RadioLibInterface.h

@@ -49,6 +49,9 @@ class RadioLibInterface : public RadioInterface
      */
     PhysicalLayer &iface;
 
+    /// are _trying_ to receive a packet currently (note - we might just be waiting for one)
+    bool isReceiving;
+
     /**
      * Glue functions called from ISR land
      */
@@ -108,4 +111,8 @@ class RadioLibInterface : public RadioInterface
      * Raw ISR handler that just calls our polymorphic method
      */
     static void isrRxLevel0();
+
+    /**
+     * If a send was in progress finish it and return the buffer to the pool */
+    void completeSending();
 };

src/rf95/SX1262Interface.cpp

@@ -30,7 +30,7 @@ bool SX1262Interface::init()
     if (res == ERR_NONE)
         startReceive(); // start receiving
 
-    return res;
+    return res == ERR_NONE;
 }
 
 bool SX1262Interface::reconfigure()
@@ -38,11 +38,10 @@ bool SX1262Interface::reconfigure()
     applyModemConfig();
 
     // set mode to standby
-    int err = lora.standby();
+    setStandby();
-    assert(err == ERR_NONE);
 
     // configure publicly accessible settings
-    err = lora.setSpreadingFactor(sf);
+    int err = lora.setSpreadingFactor(sf);
     assert(err == ERR_NONE);
 
     err = lora.setBandwidth(bw);
@@ -73,11 +72,24 @@ bool SX1262Interface::reconfigure()
     return ERR_NONE;
 }
 
+void SX1262Interface::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 SX1262Interface::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);
 }
@@ -85,15 +97,10 @@ void SX1262Interface::startReceive()
 /** Could we send right now (i.e. either not actively receving or transmitting)? */
 bool SX1262Interface::canSendImmediately()
 {
-    return true; // FIXME
-#if 0
     // 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.
-    if (_mode == RHModeIdle || isReceiving()) {
+    bool busy = sendingPacket != NULL || (isReceiving && lora.getPacketLength() > 0);
-        // if the radio is idle, we can send right away
+
-        DEBUG_MSG("immediate send on mesh fr=0x%x,to=0x%x,id=%d\n (txGood=%d,rxGood=%d,rxBad=%d)\n", p->from, p->to, p->id,
+    return !busy;
-                  txGood(), rxGood(), rxBad());
-    }
-#endif
 }

src/rf95/SX1262Interface.h

@@ -37,4 +37,7 @@ class SX1262Interface : public RadioLibInterface
      * Start waiting to receive a message
      */
     virtual void startReceive();
+
+  private:
+    void setStandby();
 };