win32 port: use win32 API functions instead of _kbhit() from conio.h

ports/win32/include/arch/sys_arch.h

@@ -74,5 +74,7 @@ void sys_arch_netconn_sem_free(void);
 #define LWIP_NETCONN_THREAD_SEM_ALLOC() sys_arch_netconn_sem_alloc()
 #define LWIP_NETCONN_THREAD_SEM_FREE()  sys_arch_netconn_sem_free()
 
+int lwip_win32_keypressed(void);
+
 #endif /* LWIP_ARCH_SYS_ARCH_H */
 

ports/win32/sys_arch.c

@@ -592,3 +592,21 @@ void sys_arch_netconn_sem_free(void)
 #endif /* LWIP_NETCONN_SEM_PER_THREAD */
 
 #endif /* !NO_SYS */
+
+/* get keyboard state to terminate the debug app on any kbhit event using win32 API */
+int lwip_win32_keypressed(void)
+{
+  INPUT_RECORD rec;
+  DWORD num = 0;
+  HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
+  BOOL ret = PeekConsoleInput(h, &rec, 1, &num);
+  if (ret) {
+    if(rec.EventType == KEY_EVENT) {
+      if(rec.Event.KeyEvent.bKeyDown) {
+        return 1;
+      }
+    }
+    ReadConsoleInput(h, &rec, 1, &num);
+  }
+  return 0;
+}

ports/win32/test.c

@@ -36,7 +36,6 @@
 #include <stdarg.h>
 #include <time.h>
 #include <string.h>
-#include <conio.h>
 
 /* lwIP core includes */
 #include "lwip/opt.h"
@@ -676,7 +675,7 @@ main_loop(void)
 #endif
 
   /* MAIN LOOP for driver update (and timers if NO_SYS) */
-  while (!_kbhit()) {
+  while (!lwip_win32_keypressed()) {
 #if NO_SYS
     /* handle timers (already done in tcpip.c when NO_SYS=0) */
     sys_check_timeouts();