implement virtual key in QEMU/mini2440

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1023 bbd45198-f89e-11dd-88c7-29a3b14d5316

tools/run-mini2440-net-sdcard.bat

@@ -1 +1,2 @@
-qemu-system-arm.exe -M mini2440 -kernel ..\bsp\mini2440\rtthread-mini2440.axf -show-cursor -serial telnet:127.0.0.1:1200,server -net nic -net tap,ifname=virtual -sd SDCARD
+start qemu-system-arm.exe -s -S -M mini2440 -kernel ..\bsp\mini2440\rtthread-mini2440.axf -show-cursor -serial telnet:127.0.0.1:1200,server -net nic -net tap,ifname=virtual -sd SDCARD -serial file:virtualkbd
+telnet 127.0.0.1 1200

tools/run-mini2440-sdcard.bat

@@ -1,3 +1,3 @@
-start qemu-system-arm.exe -M mini2440 -kernel ..\bsp\mini2440\rtthread-mini2440.axf -show-cursor -sd SDCARD -serial telnet:127.0.0.1:1200,server
-start putty.exe
+start qemu-system-arm.exe -M mini2440 -kernel ..\bsp\mini2440\rtthread-mini2440.axf -show-cursor -sd SDCARD -serial telnet:127.0.0.1:1200,server -serial file:virtualkbd
+telnet 127.0.0.1 1200