T-Watch S3 Power button managment (#9855)

* PMU interrupt pin defined in t-watch s3

* Implement button control on T-Watch S3

Added interrupt handling for the Power/Corona button on T-Watch S3, I use it to control screen state.

* Reducing labels

* Reducing labels

* Updated the comment

* ISR is now IRAM-safe

Updated interrupt management not to cause random crashes.

* Trunk

* Simplify and use INPUT_BROKER_CANCEL

---------

Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>

src/Power.cpp

@@ -1000,6 +1000,17 @@ int32_t Power::runOnce()
             powerFSM.trigger(EVENT_POWER_CONNECTED);
         }
 
+#ifdef T_WATCH_S3
+        /*
+            In the T-Watch S3 this code fragment reacts to the short press of the button by switching the
+            display on and off
+        */
+        if (PMU->isPekeyShortPressIrq()) {
+            LOG_INFO("Input: Corona Button Click");
+            InputEvent event = {.inputEvent = (input_broker_event)INPUT_BROKER_CANCEL, .kbchar = 0, .touchX = 0, .touchY = 0};
+            inputBroker->injectInputEvent(&event);
+        }
+#endif
         /*
         Other things we could check if we cared...
 

variants/esp32s3/t-watch-s3/variant.h

@@ -60,6 +60,8 @@
 
 #define BUTTON_PIN 0 // only for Plus version
 
+#define PMU_IRQ 21 // Interrupt pin for the PMU
+
 #define USE_SX1262
 #define USE_SX1268