[求助] MSP430

付经辉 2012-4-21 22:02 楼主

我用MSP430怎么就读不出DS1302中的内容呢，看了一天了，真的不知道哪里有错啊。感觉时序什么的各方面都没问题啊，硬件本人确定了没有问题啊程序如下
#include"msp430x14x.h"
#define uint unsigned int
#define uchar unsigned char
#define SCLK_HIGH P3OUT |=BIT3
#define SCLK_LOW P3OUT &=~BIT3
#define RST_HIGH P3OUT |=BIT1
#define RST_LOW P3OUT &=BIT1
#define IO_HIGH P3OUT |=BIT2
#define IO_LOW P3OUT &=~BIT2
#define IO_OUT P3DIR |=BIT2
#define IO_IN P3DIR &=~BIT2
#define IO_DATA P3IN&BIT2
uchar shi=0,fen=0,miao=0,wei=0;
uchar Code[]={0x3f,0x06 ,    //对数码管进行编码，
0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,
0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x40};

void Delayus(uint us)
{
  while(us--)
  {
for(uint i=0;i<8;i++);
  }
}

//void Reset_DS1302(void)
//{
// DS_RST_OUT;  //RST对应的IO设置为输出状态
// DS_SCL_OUT;  //SCLK对应的IO设置为输出状态
// DS_SCL_L;    //SCLK=0
// DS_RST_L;    //RST=0
// delay(10);
// DS_SCL_H; //SCLK=1
//}
void DelayMs(uint ms)
{
  while(ms--){
for(uint i=0;i<800;i++);
         }
}
void InitPort(void)
{
  P3SEL=0x00;//P3口所有引脚设置为一般的IO口
  P3DIR=0x0E;//P3.1 P3.2 P3.3设置为输出方向

  P2SEL=0x00;//P2口所有引脚设置为一般的IO口
  P4SEL=0x00;//P4口所有引脚设置为一般的IO口
  P2DIR=0xFF;//P2口所有引脚设置为输出方向
  P4DIR=0xFF;//P4口所有引脚设置为输出方向
  P2OUT=0x00;//P2口先输出低电平
  P4OUT=0xFF;//P4口先输出低电平
}
void InitClock(void)
{
  BCSCTL1=RSEL2+RSEL1+RSEL0;//XT2开启 LFXT1工作在低频模式 ACLK不分频最高的标称频率
  DCOCTL=DCO2+DCO1+DCO0;//DCO为最高频率
  do{
IFG1&=~OFIFG;//清除振荡器失效标志
for(uint i=255;i>0;i--);
  }while(IFG1&OFIFG);//判断XT2是否起振
  BCSCTL2=SELM1+SELS;//MCLK SMCLK时钟源为TX2CLK不分频
}
void WriteByte(uchar Command,uchar WriteData)
{
  uchar j,k=1;
  RST_LOW;
  SCLK_LOW;
  Delayus(100);
  RST_HIGH;
  for(j=0;j<=7;j++)
  {
SCLK_LOW;
if(Command&k) IO_HIGH;
else IO_LOW;
Delayus(100);
SCLK_HIGH;
k<<=1;
SCLK_LOW;
  }
  k=1;
  for(j=0;j<=7;j++)
  {
SCLK_LOW;
if(WriteData&k) IO_HIGH;
else IO_LOW;
Delayus(100);
SCLK_HIGH;
k<<=1;
SCLK_LOW;
  }
  RST_LOW;
}
uchar ReadByte(uchar Command)
{
  uchar i,k=1,data;
  RST_LOW;
  SCLK_LOW;
  RST_HIGH;
  for(i=0;i<8;i++)
  {
SCLK_LOW;
if(Command&k) IO_HIGH;
else IO_LOW;
Delayus(10);
SCLK_HIGH;
k<<=1;
if(i!=7)
   SCLK_LOW;
  }
  k=0;
  SCLK_HIGH;
  IO_IN;
  for(i=0;i<8;i++)
  {
   k>>=1;
   SCLK_HIGH;
Delayus(2);
SCLK_LOW;
Delayus(10);
if(IO_DATA) k|=0x80;


  }
//  IO_OUT;
  RST_LOW;
  data=k/16;
  k=k%16;
  k=k+data*10;
  return(k);
}
void display(uchar shi,uchar fen,uchar miao)
{
uchar shishi,geshi,shifen,gefen,shimiao,gemiao;
shishi=shi/10;
geshi=shi%10;

shifen=fen/10;
gefen=fen%10;

shimiao=miao/10;
gemiao=miao%10;

P4OUT=wei;
P2OUT=Code[shishi];
DelayMs(2);
P2OUT=0X00;
wei++;

P4OUT=wei;
P2OUT=Code[geshi];
DelayMs(2);
P2OUT=0X00;
wei++;

P4OUT=wei;
P2OUT=Code[16];
DelayMs(2);
P2OUT=0X00;
wei++;

P4OUT=wei;
P2OUT=Code[shifen];
DelayMs(2);
P2OUT=0X00;
wei++;

P4OUT=wei;
P2OUT=Code[gefen];
DelayMs(2);
P2OUT=0X00;
wei++;

P4OUT=wei;
P2OUT=Code[16];
DelayMs(2);
P2OUT=0X00;
wei++;

P4OUT=wei;
P2OUT=Code[shimiao];
DelayMs(2);
P2OUT=0X00;
wei++;

P4OUT=wei;
P2OUT=Code[gemiao];
DelayMs(2);
P2OUT=0X00;
if(wei==7)
wei=0;
}

void main()
{
  WDTCTL=WDTPW+WDTHOLD;//关闭看门狗
  InitClock();
  InitPort();
  SCLK_LOW;    //SCLK=0
  RST_LOW;    //RST=0
  Delayus(10);
  SCLK_HIGH; //SCLK=1
  WriteByte(0x8e,0x00);
  WriteByte(0x80,0x50);
  WriteByte(0x82,0x40);
  WriteByte(0x84,0x20);
  WriteByte(0x8e,0x80);
  while(1)
  {
   miao=ReadByte(0x81);
   fen=ReadByte(0x83);
   shi=ReadByte(0x85);
   display(shi,fen,miao);
  }


}