Output number when button is pressed using Atmega16 microcontroller

This is simple demo program of reading button state, lighting LEDs, sending information via USART. 8 buttons are connected to Atmega16 port A, 8 LEDs to port B via current limiting resistors. While none of buttons arent pressed there is running light on LEDs performed, but when any of buttons is pressed then LEDs display

Output number when button is pressed using Atmega16 microcontroller is a post from: ATMega32 AVR