Design an interface for a $64-$key keyboard, which is configured with $8$ rows and $8$ columns. Show the hardware interface to the microcontroller. Show the initialization ritual. Assume there is either no key or one key pressed. Write an embedded C program for LPC$1768$ Processor that returns the key number $0$ to $63$ if a key is pressed or $$FF$$ if no key is pressed. Assume the keys do not bounce. Assume the R$0-$R$7$ are connected to P$1\mathrm{.}0$ to P$1\mathrm{.}7$ and C$0-$C$7$ are connected to P$2\mathrm{.}0$ to P$2\mathrm{.}0.$