• 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?
  • 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?
  • 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
  • USB Key : read and write
    Hi all, I look to write to some USB key from a MCU ('53 or others) Have you some idea to it ?? Manyy thanky thanks
  • 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...