• Problem with basic system keypad interface 4x3
    Hi All, I am trying to interface a simple 4x3 keypad i have never used 2051, i am using port 3. The pins i am using are p3.0,p3.1,p3.2,p3.3,p3.4,p3.5,p3.7 this is the basic code i am using ...
  • problem with interfacing keypad
    Hey everoone! I'm using a lpc2138, And I wanna make a mini-project in this way that I have a keypad on port1(rows on P1.16 to P1.19)(columns on P1.20 to P1.23) and a lcd on port0, I want it that Once...
  • Keypad Interface
    Im doing project on ARM7 LPC21248 Board, in that i need to connect keypad and display. So that how can i get pin details for interfacing both keypad and display to the board. Thanks in advance!...
  • LPC932 and Keypad interface
    Hi, I am trying to interface a 4x4 Matrix keypad to the lpc932. I am using its keypad interrupt function. I am also using the application note AN10184 as guidance for code, but I have modified it for...
  • Keypad problem
    I use ATMEL 89c51 microcontroller with keypad 4x4. My problems is that my 1st row contain 1 2 3 A it display 1 2 3 A for every row i checked the code on proteus8 its working fine and also on 8051...