飞思卡尔MC9S12XS128单片机重点模块讲解

----------------系统的晶振是16MHz----------------------------------*/#include<hidef.h>#include"derivative.h"/*--------------------------端口定义-------------------------------------------*/#defineLED_1PORTB_PB0#defineLED_1_dirDDRB_DDRB0#defineLED_2PORTB_PB5#defineLED_2_dirDDRB_DDRB5/*--------------------------变量定义-------------------------------------------*/#defineucharunsignedchar#defineuintunsignedintuintTime_count=0;ucharLED_flag=0;/*---------------------------延时函数------------------------------------------*/voiddelay(uinta){uinti,j;for(i=0;i<a;i++)for(j=0;j<a;j++);}/*---------------------------端口初始化----------------------------------------*/voidPort_initial(){LED_1_dir=1;//定义端口B0为输出LED_2_dir=1;//定义端口B5为输出}/*------------------------------PIT模块初始化----------------------------------*/voidPIT_initial()