sci编程求大神请教

hyz229426897

#include <hidef.h>      /* common defines and macros */
#include "derivative.h"      /* derivative-specific definitions */
#include "SCI.h"
void pll_init(void) {
  CLKSEL=0x00;
  PLLCTL_PLLON=1;
  SYNR=0x04;
  REFDV=0x08;
  POSTDIV=0;
  _asm(nop);
  _asm(nop);
  while(!(CRGFLG_LOCK==1));
}
void uart_init (void){
  SCI0CR2=0x08;
  SCI0CR1=0x00;

  SCI0BDL=0x9c;
  
}
void uart_putchar(unsigned char ch){
  while(!(SCI0SR1&0x40))
    SCI0DRL=ch;
  
  
}
void main(void) {
  pll_init();
  EnableInterrupts;
  uart_init();
  uart_putchar(0x00);
  for(;;) {
//    _FEED_COP(); /* feeds the dog */
  } /* loop forever */
  /* please make sure that you never leave main */
}





为什么我的rxd和txd始终为低电平

hyz229426897

li853141431 发表于 2012-9-28 17:33
放在for循环里。

哪部份放到for循环
小弟刚刚接触不是太懂啊

li853141431

放在for循环里。

hyz229426897

求大神请教:'(:'(:'(:'(:'(:'(

hyz229426897

求大神请教:'(:'(:'(:'(:'(:'(:'(:'(:'(