Modify the C code as such that when button$0($BTN$0)$ is pressed only LED$0($LD$0)$ turns on$,$ if

button$1$ is pressed only LED$1$ turns on and so on for all four buttons. Include a screen shot of

the modified code.

#include "xparameters.h$"$

#include "xparameters.h$"$

#include "xil$\_$printf.h$"$

#include "xgpio.h$"$

#include "xil$\_$types.h$"$

$//$ Get device IDs from xparameters.h

#define BTN$\_$ID XPAR$\_$AXI$\_$GPIO$\_$BUTTONS$\_$DEVICE$\_$ID

#define LED$\_$ID XPAR$\_$AXI$\_$GPIO$\_$LED$\_$DEVICE$\_$ID

#define BTN$\_$CHANNEL $1$

#define LED$\_$CHANNEL $1$

#define BTN$\_$MASK $0$b$1111$

#define LED$\_$MASK $0$b$1111$

int main$()\{$

XGpio$\_$Config $*$cfg$\_$ptr;

XGpio led$\_$device, btn$\_$device;

u$32$ data;

xil$\_$printf$("$Entered function main$\backslash$r

$")$;

$//$ Initialize LED Device

cfg$\_$ptr $=$ XGpio$\_$LookupConfig$($LED$\_$ID$)$;

XGpio$\_$CfgInitialize$($&led$\_$device, cfg$\_$ptr$,$ cfg$\_$ptr$->$BaseAddress$)$;

$//$ Initialize Button Device

cfg$\_$ptr $=$ XGpio$\_$LookupConfig$($BTN$\_$ID$)$;

XGpio$\_$CfgInitialize$($&btn$\_$device, cfg$\_$ptr$,$ cfg$\_$ptr$->$BaseAddress$)$;

$//$ Set Button Tristate

XGpio$\_$SetDataDirection$($&btn$\_$device, BTN$\_$CHANNEL, BTN$\_$MASK$)$;

$//$ Set Led Tristate

XGpio$\_$SetDataDirection$($&led$\_$device, LED$\_$CHANNEL, $0)$;

while $(1)\{$

data $=$ XGpio$\_$DiscreteRead$($&btn$\_$device, BTN$\_$CHANNEL$)$;

data &$=$ BTN$\_$MASK;

if $($data $!=0)\{$

data $=$ LED$\_$MASK;

$\}$ else $\{$

data $=0$;

$\}$

XGpio$\_$DiscreteWrite$($&led$\_$device, LED$\_$CHANNEL, data$)$;

$\}$

$\}$