Add lesson 20

1 files changed, 34 insertions, 0 deletions

diff --git a/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.c b/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.c
new file mode 100644
index 0000000..59c89a9
--- /dev/null
+++ b/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.c
@@ -0,0 +1,34 @@
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+EFI_STATUS
+EFIAPI
+UefiMain (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  UINTN Index;
+  EFI_INPUT_KEY Key;
+
+  Print(L"Try to guess the secret symbol!\n");
+  Print(L"To quit press 'q'\n");
+
+  while(TRUE) {
+    gBS->WaitForEvent(1, &(gST->ConIn->WaitForKey), &Index);
+    gST->ConIn->ReadKeyStroke(gST->ConIn, &Key);
+    Print(L"ScanCode = %04x, UnicodeChar = %04x (%c)\n", Key.ScanCode, Key.UnicodeChar, Key.UnicodeChar);
+
+    if (Key.UnicodeChar == 'k') {
+      Print(L"Correct!\n");
+      break;
+    } else if (Key.UnicodeChar == 'q') {
+      Print(L"Bye!\n");
+      break;
+    } else {
+      Print(L"Wrong!\n");
+    }
+  }
+  gST->ConIn->Reset(gST->ConIn, FALSE);
+  return EFI_SUCCESS;
+}