avr program with assembley that specify what key pressed in keypad 3*4

c code in avr Project : Key Counter Author : Reza Sepas Yar Company : Pishro Noavaran Kavosh Chip type : ATmega16 Clock frequency : 4.000000 MHz-c code in avr Project : Key Counter Author : Reza Sepas Yar Company

AVR mega16 使用的矩阵键盘和1602液晶程序代码，带Proteus仿真。 按一键后在LCD1602 屏幕上显示按键号。-Code of Matrix keyboard and LCD1602 for AVR mega16, with Proteus simulation. After press the key, display key’s number on the LCD1602 screen .