我刚拿到一套19193EVB的板子，想试试看板子有没有问题，想写程序通过按下SW2点亮LED2，可是总是没有任何反应，由于刚刚接触硬件，不知道下面的代码哪里有问题，请大家指教！
#include <hidef.h> /* for EnableInterrupts macro */
#include <MC9S08GT60.h> /* include peripheral declarations */
/*define value for led's when on and off*/
#define ON 0
#define OFF 1
/*define value for switches when up (not pressed) and down (pressed)*/
#define UP 1
#define DOWN 0
/*define led's*/
#define LED1 PTDD_PTDD0
#define LED2 PTDD_PTDD1
#define LED3 PTDD_PTDD3
#define LED4 PTDD_PTDD4
/*define switches*/
#define SW1 PTAD_PTAD2
#define SW2 PTAD_PTAD3
#define SW3 PTAD_PTAD4
#define SW4 PTAD_PTAD5
void main(void) {
EnableInterrupts; /* enable interrupts */
/* include your code here */
PTADD = 0; //initialize as input (Data Direction Register)
PTAPE = 0x3c; //Pullups on upper 2,3,4,5 bits
/*initialize bits 0,1,3,4 of Port D as outputs (connected to led's)*/
PTDDD = 0x1b;
LED1 = OFF;
LED2 = OFF;
LED3 = OFF;
LED4 = OFF;
for(;;) {
__RESET_WATCHDOG(); /* feeds the dog */
LED2 = SW2;
} /* loop forever */
}
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