Project:Asynchronous up$/$down counter

Description:

Design an asynchronous counter using two push buttons, the microcontroller PIC$16$F$627$A$,$ and a $7-$segment display as shown in Figure $2.$ The $7-$segment will display the digits $0$ to $9$ while the push buttons will provide the increment or decrement of the digits displayed such as:

The push button connected to RAO will increment the count by one every time it is pressed down meanwhile the push button connected toRA$1$ will decrement the count by one when pressed down.

When the simulation starts, the count must be $0.$

When counting up starting from $0,$ if the count reaches $9$ the next count must reset to $0.$

Similarly, when counting down starting from $0,$ the next count must be $9$ then decreases to $0.$

A subroutine delay must be called just after sending your data to PORT B as shown in Figure $1,$ this will allow the digit to be displayed for $1$ second before the next digit is displayed. Also the delay subroutine will be provided to you and can be placed anywhere before the "END" command.

Your program must be written in assembly language of PIC$16$F$627$A$,$ and the simulation will be run on PROTEUS $7($ISIS$).$ A video of the simulation has been provided for further description.

movwf call

$06h$; PORT B

delay$\_1$s

Figure $1$