1、MC9S12XS128 系列例程-IOCCode Warrior 4.7: MC9S12XS128Crystal: 16.000Mhzbusclock:16.000MHzpllclock:32.000MHz=本程序主要包括以下功能：設(shè)置鎖相環(huán)和總線頻率；IO 口使用；IOC7 口 16 位計(jì)數(shù)器。LED 計(jì)數(shù)，根據(jù)燈亮可以系統(tǒng)循環(huán)了多少次*/ #include #include #include #pragma LINK_INFO DERIVATIVE mc9s12xs128/void setbusclock(void)CLKSEL=0X00;/disengage PLL to system

2、PLLCTL_PLLON=1;/turn on PLLSYNR=1;REFDV=1;/pllclock=2*osc*(1+SYNR)/(1+REFDV)=32MHz;_asm(nop);/BUS CLOCK=16M_asm(nop);while(!(CRG_LOCK=1);/when pll is steady ,then use it; CLKSEL_PLLSEL =1;/engage PLL to system;/sic void SCI_Init(void)SCI0CR2=0 x2c; /enable Receive Fullerrupt,RX enable,Tx enable SCI0

3、BDH=0 x00; /busclk 8MHz,19200bps,SCI0BDL=0 x1a SCI0BDL=0 x68; /SCI0BDL=busclk/(16*SCI0BDL)/busclk 16MHz, 9600bps,SCI0BDL=0 x68void uart_phar(unsigned char ch)if (ch = n)while(!(SCI0SR1&0 x80) ;SCI0DRL= 0 x0d;return;/outpRwhile(!(SCI0SR1&0 x80) ; SCI0DRL=ch;/keep waiting when not emptyvoid putstr(cha

4、r ch)unsigned char ptr=0; while(chptr)uart_phar(unsigned char)chptr+);/sic void IOC_Init(void)PACTL=0X50;/PT732 16BIT,FALLing edge,NOTERRUPTTCTL3=0 xc0;/c-輸入捕捉 7 任何沿有效,TCTL4=0 xc0;/40 表示 IC止, 1 表示上升沿, 2 表示下降沿, 3 表示任何沿TIE =0 x00;/每一位對(duì)應(yīng)相應(yīng)通道中斷允許,0 表示中斷TIOS =0 x00;/每一位對(duì)應(yīng)通道的: 0 輸入捕捉,1 輸出比較TCTL3_EDG7x=1;/c-輸入捕捉 7 任何沿有效,/void Dly_ms(ii,jj;ms)if (ms1) ms=1; for(ii=0;iims;ii+)for(jj=0;jjt);/修改延時(shí)以修改數(shù)據(jù)發(fā)送頻率/低電平燈亮用這句,注釋掉下面那句t;/高電平燈亮用