智能车制作

标题: 关于SCI问题？我的程序没有错误，但是串口助手收不到？怎么回事？请大家看看，谢谢 [打印本页]

作者: yaya198432 时间: 2010-11-12 20:16
标题: 关于SCI问题？我的程序没有错误，但是串口助手收不到？怎么回事？请大家看看，谢谢
#include <hidef.h>    /* common defines and macros */
#include "derivative.h"    /* derivative-specific definitions */
#include <MC9S12XS128.h>

//unsigned char uchar;
//uchar table[]={0xff,2897,42200,2943,41976,2988,41899,2996,41311,0x00,0xb5,0xaa};
uchar table[]={1,2,3};
uint count;

//-------------------------------------------------------
void sysclock_init(void)
{
  CLKSEL=0x00;
  PLLCTL_PLLON=1; //turn on PLL

  SYNR =0xc0 | 0x05;  //48M
  REFDV=0x80 | 0x01;
  POSTDIV=0x00;    //pllclock=2*16*(1+SYNR)/(1+REFDV)=xxMHz;

  while(CRGFLG_LOCK!=1);
  CLKSEL_PLLSEL=0x01;
}
//-------------------------------------------------------

#pragma CODE_SEG __NEAR_SEG NON_BANKED
void interrupt 20  SCI0_ISR(void)
{
  SCI0CR2_RIE=0;
                                          //此处为串口中断需要处理的事情
  PORTA_PA0=~PORTA_PA0;
  SCI0CR2_RIE = 1;
}

#pragma CODE_SEG DEFAULT
//---------------------------------------------------
static void SCI_Init(void) //初始化SCI0
{
SCI0CR1 =0x00; //正常8位模式，无奇偶校验
SCI0CR2 =0x2c; //enable Receive Full Interrupt,RX enable,Tx enable
SCI0BDH =0x00;
SCI0BD  =0x68; //SCI0BD=busclk/(16*SCI0BDL)
               //busclk  8MHz, 9600bps,SCI0BD=0x34
               //busclk 16MHz, 9600bps,SCI0BD=0x68
               //busclk 24MHz, 9600bps,SCI0BD=0x9C
}                //busclk 32MHz, 9600bps,SCI0BD=0xD0
               //busclk 40MHz, 9600bps,SCI0BD=0x106
//-----------------------------------------------------

/*void SCI_sendchar(char *cs) {  //单字符发送函数
  while(SCI0SR1_TDRE==0);
  SCI0DRL=*cs;
}

void SCI_sendstring(char *ss){  //字符串发送函数
  while(*ss){
SCI_sendchar(ss);
++ss;
  }
}*/

//-------------------------------------------------
void SCI_putchar(unsigned char *ch)  //发送子程序
{
   while(!(SCI0SR1&0x80));
   SCI0DRL= *ch;          //将待发数据写入寄存器

}

void SCI_sendchar(char *s) {
while(*s){
SCI_putchar(s);
++s;
}

}
//------------------------------------------

//------------------------------------------------------------------------
void PWM_Init(void)
{
  PWME_PWME1=0;          //禁止

  PWMPRCLK=0x22 ;       //0010 0010 B=48M/4=12M  A=48M/4=12M  先B分频  后A分频

  PWMSCLA=3;             //SA=A/2/3=2M SA对A再分频  SA=A/2/PWMSCLA SA为2M
  PWMSCLB=3;             //SB=B/2/3=2M SB对B再分频  SB=B/2/PWMSCLB SB为2M
  PWMCLK_PCLK1=1;       //通道1选SA为时钟源
  PWMPOL_PPOL1=1;       //通道1先输出高电平

  PWMCAE_CAE1=0X00;    //左对齐

  PWMCTL_CON01=1;       //通道0,1级联

  PWMPER01=42194;       //周期Frenquency=SB/42194=2M/42194=47.4Hz

  PWMDTY01=2996;                //占空比为7.1%

  PWME_PWME1=1;          //允许



  PWME_PWME3=0;          //通道3

  PWMCLK_PCLK3=1;          //通道3选SB为时钟源
  PWMPOL_PPOL3=1;          //通道3先输出高电平

  PWMCAE_CAE3=0X00;       //左对齐

  PWMCTL_CON23=1;          //通道2,3级联

  PWMPER23=42194;          //周期Frenquency=SB/42194=2M/42194=47.4Hz

  PWMDTY23=2996;             //占空比为7.1%

  PWME_PWME3=1;




  PWME_PWME5=0;             //通道5

  PWMCLK_PCLK5=1;          //通道5选SA为时钟源
  PWMPOL_PPOL5=1;          //通道5先输出高电平

  PWMCAE_CAE5=0X00;          //左对齐

  PWMCTL_CON45=1;             //通道4,5级联

  PWMPER45=42194;          //周期Frenquency=SB/42194=2M/42194=47.4Hz

  PWMDTY45=2996;                //占空比为7.1%

  PWME_PWME5=1;



  PWME_PWME7=0;       //Disable  PWM    //舵机

  PWMCLK_PCLK7=1;       //PWM7----SB

  PWMPOL_PPOL7=1;       // 起始为高电平

  PWMCAE_CAE7=0;          //左对齐

  PWMCTL_CON67=1;            //通道6,7级联

  PWMPER67=42194;          //Frenquency=SB/42194=2M/42194=47.4Hz  周期寄存器设置
  PWMDTY67=2996;          //占空比为7.1%

  PWME_PWME7=1;                //Enable 舵机PWM

}
//----------------------------------------------------------------------------

//------------------------------------------------------------
void PIT_init(void)//定时中断初始化函数 5MS定时中断设置
{
PITCFLMT_PITE=0;//总定时器关闭

PITCE_PCE0=1;//定时器通道0使能
//PITCE_PCE1=1;//定时器通道1使能
//PITCE_PCE2=1;//定时器通道2使能
//PITCE_PCE3=1;//定时器通道3使能

PITMUX_PMUX0=0;//定时器0以微定时器0为时基
//PITMUX_PMUX1=0;//定时器1以微定时器0为时基
//PITMUX_PMUX2=0;//定时器2以微定时器0为时基
//PITMUX_PMUX3=0;//定时器3以微定时器0为时基

PITMTLD0=240-1;//8位定时器初值设定,240分频，在48MHzBusClock下，为0.2MHz。即5us
//PITMTLD1=240-1;//8位定时器初值设定
//PITMTLD2=240-1;//8位定时器初值设定
//PITMTLD3=240-1;//8位定时器初值设定

PITLD0=2000-1;//16位定时器初值设定。PITTIME*0.005MS =2000*0.005ms=10ms
//PITLD1=PITTIME-1;//16位定时器初值设定
//PITLD2=PITTIME-1;//16位定时器初值设定
//PITLD3=PITTIME-1;//16位定时器初值设定

PITINTE_PINTE0=1;//定时器中断通道0中断使能
//PITINTE_PINTE1=1;//定时器中断通道1中断使能
//PITINTE_PINTE2=1;//定时器中断通道2中断使能
//PITINTE_PINTE3=1;//定时器中断通道3中断使能

PITCFLMT_PITE=1;//总定时器开启
}
//---------------------------------------------------------------

//--------------------------------------
void Dly_ms(int ms)
{
int ii,jj;
if (ms<1) ms=1;
for(ii=0;ii<ms;ii++)
   for(jj=0;jj<2670;jj++); //busclk:16MHz--1ms
}
//---------------------------------------

//--------------------------------------------------------------------
void main(void)
{
sysclock_init();

PWM_Init();

PIT_init();
SCI_Init();
DDRA=0XFF ;

PUCR_PUPBE=1;
   EnableInterrupts;


  for(;;)
{
PWMDTY67=2100;
PORTB=0xff;
_FEED_COP();
PORTA_PA0=~PORTA_PA0;
                     /* feeds the dog */
SCI_sendchar("Hello World!");
Dly_ms(1000);
  }                               /* loop forever */
                                 /* please make sure that you never leave main */
}

作者: yaya198432 时间: 2010-11-12 20:17
我的串口测试没有任何问题，以为2和3没有反接，结果反接了也不对，或许就是程序问题？请大家帮忙，急急急急

作者: dashier 时间: 2011-12-8 19:08
试试不加中断

作者: 370255785 时间: 2012-2-15 16:52

作者: 七年之痒 时间: 2012-2-28 15:06
把EnableInterrupts;去掉试试，把串口中断去掉，直接向电脑发数据

欢迎光临智能车制作 (http://111.231.132.190/)