• shift key
    whats wrong? i use the code check_keybaord ( 55 ) and it works for most but i cant get the shift key to work. can you help?
  • Key error
    I have what appears to be a problem with the PK51 development environment. I have two development systems one running under NT and the other XP. When I enter the simulator mode using the NT machine around...
  • how to get the arrow key??
    hi... how can I get "up arrow","down arrow","right arrow" and "left arrow" key via RS-232 to 8051?? these keys are include two ascii key code. thx for you help!! regards. jason
  • 3x4 key pad
    Hi, if a 3x4 keypad is connected to port 0 of 89c51. all pins on port 0 need to connect pull up resistor or not?
  • TEA encryption with 128bit key
    If anyone needs some basic encryption in software, here's one solution. This TEA implementation fits within less than 700 bytes. It's based on original TEA. P89LPC901 needs 300ms for 32 iterations. Compiled...