• matrix keypad multiplex with lcd
    Hi, can anyone help me about using keil c (8052) to use P1_0 to P1_3 as row of matrix keypad pin and also 4 data pins od 16x2 lcd (i.e. P1_0 to P1_3 multiplex with matrix keypad and lcd !). using matrix...
  • 4x4 Matrix keypad help
    Hi, i am new to ucontroller programming. I wanted to make some password and 7-segment display projects using 4x4 matrix keyboard as input, in C. I just need some simple example links or sample code...
  • Problems with Flashmon when debugging AT89C51SND1
    Enviroment: KEIL DK51 IDE AT89c51SND1 demo board v2.2 Sample APP from KEIL CD Problems: 1. FlashMon preloaded to cpu thru USB according to guide. Debigger can't communicate with borad in auto baudrate...
  • external ram addressing ( CompactFlash) with AT89C51SND1
    Hi, I try to communicate with an compactflash with external memory (movex). My microcontroler is AT89C51SND1 My initial values : extern xdata Byte volatile CF_SECTOR_COUNT _at_ 0x1F2; ...
  • Suggest changes to the code for matrix keypad
    I wrote this code for displaying the key on the LCD that is pressed in the matrix keypad. The program is not working in the hardware platform.Kindly suggest changes to the code: #include<reg51.h...