hi,
this is my question

Write program for real time clock with buttons to do clock setup and LCD for display. The LCD module is HD44780.

The program shall be able to run in Keil simulator (you can suppose BF is ready).
The program is able to accept keys for clock setup (change time) and display HH:MM AM/PM (you can use 24 hours and display 12 hours+AM.PM). Using interrupt is not a constraint.

LCD is 1 line, 8bit interface, using subroutine for its initialization.