Add example sketch to read reset reason

Author: pennam

libraries/STM32H747_System/examples/STM32H747_getResetReason/STM32H747_getResetReason.ino

@@ -0,0 +1,44 @@
+#include "STM32H747_System.h"
+
+void setup() {  
+  Serial.begin(115200);
+  while (!Serial) {}
+
+  reset_reason_t resetReason = STM32H747::getResetReason();
+  Serial.println(getString(resetReason));
+}
+
+String getString(reset_reason_t val) {
+  switch (val){
+  case RESET_REASON_POWER_ON:
+    return "Reset Reason Power ON";
+  case RESET_REASON_PIN_RESET:
+    return "Reset Reason PIN Reset";
+  case RESET_REASON_BROWN_OUT:
+    return "Reset Reason Brown Out";
+  case RESET_REASON_SOFTWARE:
+    return "Reset Reason Software";
+  case RESET_REASON_WATCHDOG:
+    return "Reset Reason Watchdog";
+  case RESET_REASON_LOCKUP:
+    return "Reset Reason Lockup";
+  case RESET_REASON_WAKE_LOW_POWER:
+    return "Reset Reason Wake Low Power";
+  case RESET_REASON_ACCESS_ERROR:
+    return "Reset Reason Access Error";
+  case RESET_REASON_BOOT_ERROR:
+    return "Reset Reason Boot Error";
+  case RESET_REASON_MULTIPLE:
+    return "Reset Reason Multiple";
+  case RESET_REASON_PLATFORM:
+    return "Reset Reason Platform";
+  case RESET_REASON_UNKNOWN:
+    return "Reset Reason Unknown";
+  default:
+    return "N/A";
+  }
+}
+
+void loop() {  
+  delay(1000);
+}