Various improvements (#461)

* **New Features**
  * Time and delay utilities added (ticks, ms, µs); SD card now uses an expansion-header CS pin; HTTP downloads warn when run on the GUI task and yield to avoid blocking.

* **Bug Fixes / Reliability**
  * Many hard-crash paths converted to guarded checks to reduce abrupt termination and improve stability.

* **Tests**
  * Unit tests added to validate time and delay accuracy.

* **Chores**
  * License header and build/macro updates.

Tactility/Source/service/wifi/Wifi.cpp

@@ -1,6 +1,7 @@
 #include <Tactility/service/wifi/Wifi.h>
 
 #include <Tactility/Check.h>
+#include <Tactility/CoreDefines.h>
 #include <Tactility/service/ServiceManifest.h>
 #include <Tactility/service/ServiceRegistration.h>
 
@@ -22,7 +23,7 @@ const char* radioStateToString(RadioState state) {
         case Off:
             return TT_STRINGIFY(Off);
     }
-    tt_crash("not implemented");
+    check(false, "not implemented");
 }
 
 extern const ServiceManifest manifest;

Tactility/Source/service/wifi/WifiEsp.cpp

@@ -6,6 +6,7 @@
 
 #include <Tactility/service/wifi/Wifi.h>
 
+#include <Tactility/Check.h>
 #include <Tactility/EventGroup.h>
 #include <Tactility/Logger.h>
 #include <Tactility/LogMessages.h>
@@ -140,7 +141,7 @@ static std::shared_ptr<Wifi> wifi_singleton;
 std::shared_ptr<PubSub<WifiEvent>> getPubsub() {
     auto wifi = wifi_singleton;
     if (wifi == nullptr) {
-        tt_crash("Service not running");
+        check(false, "Service not running");
     }
 
     return wifi->pubsub;
@@ -472,7 +473,7 @@ static void dispatchAutoConnect(std::shared_ptr<Wifi> wifi) {
     }
 }
 
-static void eventHandler(TT_UNUSED void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) {
+static void eventHandler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) {
     auto wifi = wifi_singleton;
     if (wifi == nullptr) {
         LOGGER.error("eventHandler: no wifi instance");

Tactility/Source/service/wifi/WifiMock.cpp

@@ -76,7 +76,7 @@ void setScanRecords(uint16_t records) {
 }
 
 std::vector<ApRecord> getScanResults() {
-    tt_check(wifi);
+    check(wifi);
 
     std::vector<ApRecord> records;
     records.push_back((ApRecord) {
@@ -145,14 +145,14 @@ class WifiService final : public Service {
 
 public:
 
-    bool onStart(TT_UNUSED ServiceContext& service) override {
-        tt_check(wifi == nullptr);
+    bool onStart(ServiceContext& service) override {
+        check(wifi == nullptr);
         wifi = new Wifi();
         return true;
     }
 
-    void onStop(TT_UNUSED ServiceContext& service) override {
-        tt_check(wifi != nullptr);
+    void onStop(ServiceContext& service) override {
+        check(wifi != nullptr);
         delete wifi;
         wifi = nullptr;
     }