Raspberry Pi Pico target (with sparkfun lora hat) does compile but needs further work.

Also contains a small fix to make PRIVATE_HW targets build again for nRF52 architectures

src/FSCommon.cpp

@@ -44,7 +44,7 @@ bool renameFile(const char* pathFrom, const char* pathTo)
 void listDir(const char * dirname, uint8_t levels)
 {
 #ifdef FSCom
-    File root = FSCom.open(dirname);
+    File root = FSCom.open(dirname, FILE_O_READ);
     if(!root){
         return;
     }
@@ -71,7 +71,7 @@ void listDir(const char * dirname, uint8_t levels)
 void rmDir(const char * dirname)
 {
 #ifdef FSCom
-    File file = FSCom.open(dirname);
+    File file = FSCom.open(dirname, FILE_O_READ);
     if(!file){
         return;
     }

src/FSCommon.h

@@ -13,6 +13,15 @@
 #define FILE_O_READ "r"
 #endif
 
+#if defined(ARCH_RP2040)
+// RP2040
+#include "LittleFS.h"
+#define FSCom LittleFS
+#define FSBegin() FSCom.begin()
+#define FILE_O_WRITE "w"
+#define FILE_O_READ "r"
+#endif
+
 #if defined(ARCH_ESP32)
 // ESP32 version
 #include "LITTLEFS.h"

src/mesh/NodeDB.cpp

@@ -297,7 +297,7 @@ bool loadProto(const char *filename, size_t protoSize, size_t objSize, const pb_
 #ifdef FSCom
     // static DeviceState scratch; We no longer read into a tempbuf because this structure is 15KB of valuable RAM
 
-    auto f = FSCom.open(filename);
+    auto f = FSCom.open(filename, FILE_O_READ);
 
     if (f) {
         DEBUG_MSG("Loading %s\n", filename);

src/nrf52/architecture.h

@@ -40,6 +40,8 @@
     #define HW_VENDOR HardwareModel_T_ECHO
 #elif defined(NORDIC_PCA10059)
     #define HW_VENDOR HardwareModel_NRF52840_PCA10059
+#elif defined(PRIVATE_HW)
+    #define HW_VENDOR HardwareModel_PRIVATE_HW
 #else
     #define HW_VENDOR HardwareModel_NRF52_UNKNOWN
 #endif

src/rp2040/architecture.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#define ARCH_RP2040
+
+#if defined(PRIVATE_HW)
+    #define HW_VENDOR HardwareModel_PRIVATE_HW
+#endif

src/rp2040/main-rp2040.cpp

@@ -0,0 +1,30 @@
+#include "configuration.h"
+#include <stdio.h>
+#include <pico/unique_id.h>
+
+void setBluetoothEnable(bool on)
+{
+    // not needed
+}
+
+void cpuDeepSleep(uint64_t msecs)
+{
+    // not needed
+}
+
+void updateBatteryLevel(uint8_t level)
+{
+    // not needed
+}
+
+void getMacAddr(uint8_t *dmac)
+{
+    pico_unique_board_id_t src;
+    pico_get_unique_board_id(&src);
+    dmac[5] = src.id[0];
+    dmac[4] = src.id[1];
+    dmac[3] = src.id[2];
+    dmac[2] = src.id[3];
+    dmac[1] = src.id[4];
+    dmac[0] = src.id[5];
+}

src/rp2040/rp2040CryptoEngine.cpp

@@ -0,0 +1,36 @@
+#include "configuration.h"
+#include "CryptoEngine.h"
+#include "aes.hpp"
+
+class RP2040CryptoEngine : public CryptoEngine
+{
+  public:
+    RP2040CryptoEngine() {}
+
+    ~RP2040CryptoEngine() {}
+
+    /**
+     * Encrypt a packet
+     *
+     * @param bytes is updated in place
+     */
+    virtual void encrypt(uint32_t fromNode, uint64_t packetNum, size_t numBytes, uint8_t *bytes) override
+    {
+        if (key.length > 0) {
+            AES_ctx ctx;
+            initNonce(fromNode, packetNum);
+            AES_init_ctx_iv(&ctx, key.bytes, nonce);
+            AES_CTR_xcrypt_buffer(&ctx, bytes, numBytes);
+        }
+    }
+
+    virtual void decrypt(uint32_t fromNode, uint64_t packetNum, size_t numBytes, uint8_t *bytes) override
+    {
+        // For CTR, the implementation is the same
+        encrypt(fromNode, packetNum, numBytes, bytes);
+    }
+
+  private:
+};
+
+CryptoEngine *crypto = new RP2040CryptoEngine();