• KEYBOARD scanning
    I am developing an 8051 based keypad module. Problem i am facing is that program is scanning port very fast so that a simngle keypress will be taken as multiple presses. To over come this a delay was...
  • Keyboard Scanning Using 8255
    Hi all I have interfaced 64K SRAM and 8255 PPI to 8051RD2 for scanning Matrix keyboard. On resetting the system all port pins of 8255 go to high impedence state. i am using Memory map technique to...
  • How to Incorporate Fortify Scanning
    For all of our other embedded software, Make is used to build the projects. However due to Microvision not using Make, I have yet to figure out how to incorporate Fortify Scanning. If anyone is...
  • keyboard
    hello friends, I want to interface PS/2 keyboard to 8051 microcontroller.Anybody will give me an idea to prepare scancodes and code(C). thank you. with regards, sai
  • keyboard
    Hi, Below is a simple keyboard program, where i need to lock in 3 numeric digits only. The user will exit the program by pressing a non-numeric key. Until then, he can press any no. of keys. the...