void main$()$ f

unsigned short current$\_$duty, old$\_$duty, current$\_$duty$1,$ old$\_$duty$1$;

PORTA $=255$;

TRISA $=255$; $\frac{,}{\frac{?}{?}}$ configure PORTA pins as input

PORTB $=0$;$\frac{,}{\frac{?}{?}}$ set PORTB to $0$

TRISB $=0$;$,//$ designate PORTB pins as output

PORTC $=0$;$\frac{,}{\frac{?}{?}}$ set PORTC to $0$

TRISC $=0$;$,//$ designate PORTC pins as output

PWM$1\_$Init$(5000)$; $//$ Initialize PWM$1$ module at $5KHz$

PWM$2\_$Init$(5000)$; $///$ Initialize PWM$2$ module at $5$ KHz

current$\_$duty $=16$;$\frac{,}{\frac{?}{?}}$ initial value for current$\_$duty

current$\_$duty$1=16$; $\frac{,}{\frac{?}{?}}$ initial value for current$\_$duty$1$

PWM$1\_$Start$)$; $,//$ start PWM$1$

PWM$2\_$Start$()$; $,//$ start PWM$2$

PWM$1\_$Set$\_$Duty$($current$\_$duty$)$; $//$ Set current duty for PWM$1$

PWM$2\_$Set$\_$Duty$($current$\_$duty$1)$; $//$ Set current duty for PWM$2$

while $(1)1\frac{,}{\frac{?}{?}}$ endless loop

if $($RAO$\_$bit$)\{//$ button on RAO pressed

Delay$\_$ms$(40)$;

current$\_$duty$+4$; $//$ increment current$\_$duty

PWM$1\_$Set$\_$Duty$($current$\_$duty$)$;

$$

if $($RA$1\_$bit$)\{//$ button on RA$1$ pressed

Delay$\_$ms$(40)$; $,//$ decrement current$\_$duty

PWM$1\_$Set$\_$Duty$($current$\_$duty$)$;

$$

if $($RA$2\_$bit$)$ f $//$ button on RA$2$ pressed

Delay$\_$ms$(40)$;

current$\_$duty$1++$; $//$ increment current$\_$duty$1$

PWM$2\_$Set$\_$Duty$($current$\_$duty$1)$;

$\}$

if $($RA$3\_$bit$)$ f $//$ button on RA$3$ pressed

Delay$\_$ms$(40)$;

current$\_$duty$1-$; $//$ decrement current$\_$duty$1$

PWM$2\_$Set$\_$Duty$($current$\_$duty$1)$;

$\}$

Delay$\_$ms$(5)$; $\frac{,}{\frac{?}{?}}$ slow down change pace a little

H