progress

TODO.md

@@ -2,13 +2,27 @@
 
 # High priority
 
-* add mesh layer
+* make protobufs more real
-* wrap in nice MeshRadio class
+* attach mesh service to radio and bluetooth
 
 # Medium priority
 
 * add interrupt detach/sleep mode config to lora radio so we can enable deepsleep without panicing
+* figure out if we can use PA_BOOST
+* scrub default radio config settings for bandwidth/range/speed
+* use a freertos thread to remain blocked reading from recvfromAckTimeout, so that we don't need to keep polling it from our main thread
+* override peekAtMessage so we can see any messages that pass through our node (even if not broadcast)?  would that be useful?
+
+# Pre-beta priority
+
+* make sure main cpu is not woken for packets with bad crc or not addressed to this node - do that in the radio hw
+* enable fast init inside the gps chip
+* dynamically select node nums
+* triple check fcc compliance
+* allow setting full radio params from android
 
 # Done
 
 * change the partition table to take advantage of the 4MB flash on the wroom: http://docs.platformio.org/en/latest/platforms/espressif32.html#partition-tables
+* wrap in nice MeshRadio class
+* add mesh send & rx

lib/BluetoothOTA/src/MeshBluetoothService.cpp

@@ -43,7 +43,7 @@ public:
     mesh sw does if it does conflict?  would it be better for people who are replying with denynode num to just broadcast their denial?)
 };
 
-class Mesh {
+class MeshRadio {
 
 public:
 
@@ -51,11 +51,11 @@ public:
     void handleFromMesh(NodeNum fromNode, NodeNum toNode, std::string s);
 
     /// handle a packet from the phone, send it on the mesh
-    void handleFromRadio(MeshPacket p);
+    void handleToMesh(MeshPacket p);
 };
 
 /// Top level app for this service.  keeps the mesh, the radio config and the queue of received packets.
-class MeshRadio {
+class MeshService {
 public:
 };
 

src/MeshRadio.cpp

@@ -1,47 +1,84 @@
 #include <SPI.h>
 #include <RH_RF95.h>
+#include <RHMesh.h>
+#include <assert.h>
 
 #include "MeshRadio.h"
 #include "configuration.h"
 
-// Singleton instance of the radio driver
+
-RH_RF95 rf95(NSS_GPIO, DIO0_GPIO);
 
 // Change to 434.0 or other frequency, must match RX's freq!
 #define RF95_FREQ 915.0
 
+MeshRadio radio;
+
+/**
+ * get our starting (provisional) nodenum from flash.  But check first if anyone else is using it, by trying to send a message to it (arping)
+ */
+NodeNum getDesiredNodeNum() {
+    uint8_t dmac[6];
+    esp_efuse_mac_get_default(dmac);
+
+    // FIXME
+    uint8_t r = dmac[5];
+    assert(r != 0xff); // It better not be the broadcast address
+    return r;
+}
+
+
+MeshRadio::MeshRadio() : rf95(NSS_GPIO, DIO0_GPIO), manager(rf95, getDesiredNodeNum()) {
+
+}
+
+bool MeshRadio::init() {
+    pinMode(RESET_GPIO, OUTPUT); // Deassert reset
+    digitalWrite(RESET_GPIO, HIGH);
+
+    // pulse reset
+    digitalWrite(RESET_GPIO, LOW);
+    delay(10);
+    digitalWrite(RESET_GPIO, HIGH);
+    delay(10);
+
+    if (!manager.init()) {
+        Serial.println("LoRa radio init failed");
+        Serial.println("Uncomment '#define SERIAL_DEBUG' in RH_RF95.cpp for detailed debug info");
+        return false;
+    }
+
+    Serial.println("LoRa radio init OK!");
+
+    // Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM
+    if (!rf95.setFrequency(RF95_FREQ)) {
+        Serial.println("setFrequency failed");
+        while (1);
+    }
+    Serial.print("Set Freq to: "); Serial.println(RF95_FREQ);
+    
+    // Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on
+
+    // The default transmitter power is 13dBm, using PA_BOOST.
+    // If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then 
+    // you can set transmitter powers from 5 to 23 dBm:
+    // FIXME - can we do this?
+    // rf95.setTxPower(23, false);
+}
+
+
+ErrorCode MeshRadio::sendTo(NodeNum dest, const uint8_t *buf, size_t len) {
+    return manager.sendtoWait((uint8_t *) buf, len, dest);
+}
+
+void MeshRadio::loop() {
+    // FIXME read from radio with recvfromAckTimeout
+}
 
 void mesh_init() {
-  pinMode(RESET_GPIO, OUTPUT);
+  while (!radio.init()) {
-  digitalWrite(RESET_GPIO, HIGH);
+    Serial.println("radio init failed");
-
-
-  // manual reset
-  digitalWrite(RESET_GPIO, LOW);
-  delay(10);
-  digitalWrite(RESET_GPIO, HIGH);
-  delay(10);
-
-  while (!rf95.init()) {
-    Serial.println("LoRa radio init failed");
-    Serial.println("Uncomment '#define SERIAL_DEBUG' in RH_RF95.cpp for detailed debug info");
     while (1);
   }
-  Serial.println("LoRa radio init OK!");
-
-  // Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM
-  if (!rf95.setFrequency(RF95_FREQ)) {
-    Serial.println("setFrequency failed");
-    while (1);
-  }
-  Serial.print("Set Freq to: "); Serial.println(RF95_FREQ);
-  
-  // Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on
-
-  // The default transmitter power is 13dBm, using PA_BOOST.
-  // If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then 
-  // you can set transmitter powers from 5 to 23 dBm:
-  rf95.setTxPower(23, false);
 }
 
 
@@ -49,15 +86,14 @@ int16_t packetnum = 0;  // packet counter, we increment per xmission
 
 void mesh_loop()
 {
+  radio.loop();
+
   delay(1000); // Wait 1 second between transmits, could also 'sleep' here!
   Serial.println("Transmitting..."); // Send a message to rf95_server
   
   char radiopacket[20] = "Hello World #      ";
-  itoa(packetnum++, radiopacket+13, 10);
+  sprintf(radiopacket, "hello %d", packetnum++);
-  Serial.print("Sending "); Serial.println(radiopacket);
-  radiopacket[19] = 0;
   
   Serial.println("Sending...");
-  delay(10);
+  radio.sendTo(NODENUM_BROADCAST, (uint8_t *)radiopacket, sizeof(radiopacket));
-  rf95.send((uint8_t *)radiopacket, 20);
 }

src/MeshRadio.h

@@ -1,4 +1,37 @@
 #pragma once
 
+#include <RH_RF95.h>
+#include <RHMesh.h>
+
+#define NODENUM_BROADCAST 255
+
+typedef int ErrorCode;
+typedef uint8_t NodeNum;
+
+
+/**
+ * A raw low level interface to our mesh.  Only understands nodenums and bytes (not protobufs or node ids)
+ */
+class MeshRadio {
+public:
+    MeshRadio();
+
+    bool init();
+
+    /// Send a packet - the current implementation blocks for a while possibly (FIXME)
+    ErrorCode sendTo(NodeNum dest, const uint8_t *buf, size_t len);
+
+    /// Do loop callback operations (we currently FIXME poll the receive mailbox here)
+    void loop();
+
+
+private:
+    RH_RF95 rf95; // the raw radio interface
+    RHMesh manager;
+
+};
+
+extern MeshRadio radio;
+
 void mesh_init();
 void mesh_loop();