RP2040: Enable ExternalNotification and RangeTest Module, set randomSeed (#2664)

* Enable ExternalNotification (and RangeTest) Module

* Set a random seed at boot

src/main.cpp

@@ -458,6 +458,11 @@ void setup()
 #ifdef ARCH_NRF52
     nrf52Setup();
 #endif
+
+#ifdef ARCH_RP2040
+    rp2040Setup();
+#endif
+
     // We do this as early as possible because this loads preferences from flash
     // but we need to do this after main cpu iniot (esp32setup), because we need the random seed set
     nodeDB.init();

src/main.h

@@ -68,7 +68,7 @@ extern uint32_t serialSinceMsec;
 // This will suppress the current delay and instead try to run ASAP.
 extern bool runASAP;
 
-void nrf52Setup(), esp32Setup(), nrf52Loop(), esp32Loop(), clearBonds();
+void nrf52Setup(), esp32Setup(), nrf52Loop(), esp32Loop(), rp2040Setup(), clearBonds();
 
 meshtastic_DeviceMetadata getDeviceMetadata();
 

src/modules/Modules.cpp

@@ -24,7 +24,7 @@
 #include "modules/esp32/AudioModule.h"
 #include "modules/esp32/StoreForwardModule.h"
 #endif
-#if defined(ARCH_ESP32) || defined(ARCH_NRF52)
+#if defined(ARCH_ESP32) || defined(ARCH_NRF52) || defined(ARCH_RP2040)
 #include "modules/ExternalNotificationModule.h"
 #include "modules/RangeTestModule.h"
 #if (defined(ARCH_ESP32) || defined(ARCH_NRF52)) && !defined(CONFIG_IDF_TARGET_ESP32S2)
@@ -81,7 +81,7 @@ void setupModules()
 
         storeForwardModule = new StoreForwardModule();
 #endif
-#if defined(ARCH_ESP32) || defined(ARCH_NRF52)
+#if defined(ARCH_ESP32) || defined(ARCH_NRF52) || defined(ARCH_RP2040)
         externalNotificationModule = new ExternalNotificationModule();
         new RangeTestModule();
 #endif
@@ -92,4 +92,4 @@ void setupModules()
     // NOTE! This module must be added LAST because it likes to check for replies from other modules and avoid sending extra
     // acks
     routingModule = new RoutingModule();
-}
+}

src/platform/rp2040/main-rp2040.cpp

@@ -27,4 +27,12 @@ void getMacAddr(uint8_t *dmac)
     dmac[2] = src.id[4];
     dmac[1] = src.id[3];
     dmac[0] = src.id[2];
+}
+
+void rp2040Setup()
+{
+    /* Sets a random seed to make sure we get different random numbers on each boot.
+       Taken from CPU cycle counter and ROSC oscillator, so should be pretty random.
+    */
+    randomSeed(rp2040.hwrand32());
 }

variants/rpipico/variant.h

@@ -19,6 +19,7 @@
 // SDA = 4
 // SCL = 5
 
+#define EXT_NOTIFY_OUT 22
 #define BUTTON_PIN 17
 
 #define LED_PIN PIN_LED

variants/rpipicow/variant.h

@@ -19,6 +19,7 @@
 // SDA = 4
 // SCL = 5
 
+#define EXT_NOTIFY_OUT 22
 #define BUTTON_PIN 17
 
 #define BATTERY_PIN 26