两个STC12C5A60S2的SPI通信问题，烧写后没现象，求大神赐教，非常感谢。

qishi821

#include <STC_12.h>
#include <stdio.h>

#include "tft_9325.h"
#include "temp75.h"

void delay_t(u32 t);

char str2[18];
char str1[18];
char str3[18];
char str4[18];

//sbit SPIF = SPSTAT^7;
//sbit WCOL = SPSTAT^6;
//sfr AUXR = 0x8e;
#define FOSC 18432000L
#define BAUD (256-FOSC/32/115200)

#define SPIF 0x80
#define WCOL 0x40
#define SSIG 0x80
#define SPEN 0x40
#define DORD 0x20
#define MSTR 0x10
#define CPOL 0x08
#define CPHA 0x04
#define SPDHH 0x00
#define SPDH 0x01
#define SPDL 0x02
#define SPDLL 0x03
sbit SPISS = P1^3;
void InitUart();
void init_spi(void);
void SendUart(u8 dat);  //Send data to PC
u8 RecvUart();    //receive data from PC
u8 SPISwap(u8 dat);   //swap SPI data between master
void SPI_write(uchar dat);
uchar SPI_read();
sbit SCK = P1^7;
sbit MOSI = P1^5;
sbit MISO = P1^6;
sbit CSN = P1^4 ;// 28J60 -- CS
void WriteByte(u8 temp);
u8 ReadByte(void);

int main (void)
{
 u8 i = 0;
 float temp = 0;
 TFT_Init();  //显示屏初始化
 TMP75_Init(); //温度传感器初始化
 ClearScreen(0xffff);//清屏(白色)

 SPCTL = 0xfc; //设置为主机，并且最低位先发送，数据
      //在SPICLK前时钟沿驱动，在后时钟沿采样
 SPSTAT = 0xc0;
 1M0 = 0x00; 
 1M0 = 0x00;  //将P1口设置为准双向IO口

// InitUart();   //initial UART
 init_spi();    //initial SPI

 

 

 

 while(1)
 {
  float tmp = TMP75_Read(); //调用读取温度的函数
  tmp = tmp*0.062;    //因为TMP温度传感器的分辨率为0.0625 
  TFT_PutStr(100,100,"Current TMP:",0,0xffff);  //显示“Current TMP：” (分别为横坐标、纵坐标，所要显示的字符串，字体颜色，背景颜色)；
  sprintf(str2,"%.1f ^C",tmp);   //把当前温度存放到str里
  TFT_PutStr(200,100,str2,0,0xffff); //显示str里存放的当前温度数据 
  delay_t(0xfff);    //延时

  tmp = tmp * 10;
  str4[0] = (int)tmp / 100;
  str4[1] = (int)tmp % 100 / 10;
  str4[2] = (int)tmp % 10;

  for(i = 0; i < 3; i++)
  {
   WriteByte(str4);
  }

//   SendUart('1');
/*  WCOL = 1;
  while(str2 != '\0')
  {
   SPDAT = str2; 
  }
  while(SPSTAT = 0x40);
//  SPIF = 1;

  for(i = 0; i < 4; i++)
  {
   while(SPSTAT = 0x40);
  // while(str2 != '\0')
  // {
       str1 = SPDAT; 
  // }
  }
//  while(SPSTAT = 0x40);  */

/**  if(RI)
  {
   SPCTL = SPEN|MSTR;   //SET AS MASTER
   SendUart(SPISwap(RecvUart()));
   SPCTL = SPEN;       //reset as slave
  }
  if(SPSTAT & SPIF)
  {
   SPSTAT = SPIF|WCOL; //clear SPI status
   SPDAT = SPDAT;      //mov data from receive buffer to send buffer
  }
   */
  for(i = 0; i < 3; i++)
  {
   str1 = ReadByte();
  } 
  temp = (str1[0] * 100 + str1[1] * 10 + str1[2]) / 10;    

  TFT_PutStr(100,80,"Remote TMP:",0,0xffff);  //显示“Current TMP：” (分别为横坐标、纵坐标，所要显示的字符串，字体颜色，背景颜色)；
  sprintf(str3,"%.1f ^C",temp);   //把当前温度存放到str里
  TFT_PutStr(190,80,str3,0,0xffff); //显示str里存放的当前温度数据 
  delay_t(0xfff);    //延时

 }
 return 0;
}

void delay_t(u32 t)
{
 while(t--);
}
/*
void InitUart()
{
 SCON = 0x5a;      //set UART mode as 8-bit variable baudrate
 TMOD = 0x20;      //timer1 as 8-bit auto reload mode
 AUXR = 0x40;      //timer1 work at 1T mode
 TH1 = TL1 = BAUD; //115200bps
 TR1 = 1;         
}    */

void init_spi(void)
{
//SSIG = 1;   //忽略SS脚
//SPEN = 1;   //允许SPI工作
//DORD = 0;   //先传高位MSB
//MSTR = 1;   //设置单片机为主机
SPCTL = 0xD0; //SPI Control Register SSIG SPEN DORD MSTR CPOL CPHA SPR1 SPR0 0000,0100
SPSTAT = 0xC0; //
//IE2 |= 0x02; //允许SPI中断控制位
}

u8 ReadByte(void)
{
idata u8 temp;
//SPSTAT = 0xC0;
SPDAT = 0x00;
while(!(SPSTAT & 0x80));
temp = SPDAT;
SPSTAT = 0xC0;
return temp;
}

void WriteByte(u8 temp)
{
 SPDAT = temp;
 while(!(SPSTAT & 0x80));
 SPSTAT = 0xC0;
}

  /*
void SPI_write(uchar dat)
{
 uchar a;
 for(a=0;a<8;a++)
  { 
  SCK=0;
  MOSI=dat&0x80;
  SCK=1;
  delay_t(5);
  dat<<=1;
  }
}

uchar SPI_read()
{
 uchar a,dat;
 for (a=0;a<8;a++)
 {
  SCK=0;
  delay_t(5);
  SCK=1;
                                 
 
  dat<<=1;
  dat|=MISO;
  }
 return dat;
}   */