程序下到c8051单片机中没有反应，这是为什么？

这是程序：#include
#include "compiler_defs.h"
#include "C8051F520A_defs.h"

// FRAM25V10功能定义 ===============================
#define WRITE 0x02  // 写内存空间
#define READ  0x03  // 读内存空间
#define WRDI  0x04  // 写禁止
#define WREN  0x06  // 设置写使能锁存
//==============================================================
//other
#define SYSCLK 24500000  //定义系统始终24.5MHz
#define BAUDRATE 57600 //baud rate
#define SPI_CLOCK 2450000
//================================================================================

// 端口定义       =================================================================
***it tx=P0^4;         // 输出，回读数据口
***it cs1=P1^7;         // 输出，铁电1片选
***it cs2=P2^2;         //输出，铁电2片选
***it write_or_read=P1^0;
***it choose_fram=P0^7;       //读铁电

//===============================================
//初始化部分
void timer2_Init();
void ADC_Init();
void Port_IO_Init()       ;
void Oscillator_Init();
//void Timer1_Init();
void UART0_Init();
void SPI_Init()       ;

void Init_Device() ;

//============================================================
//SPI读写部分
void SPI_transfer(unsigned char SPI_byte);
char SPI_read(void);

//=======================================================
//fram读写部分
void fram_start_write()       ;
void fram_start_read() ;
//==============================================
//延时子程序
void delay_ms(unsigned int xms);
//====================================

void main()
{
      unsigned char j;

      PCA0MD &= 0xBF;         // 关闭看门狗定时器
      Init_Device();
      delay_ms(100);
            for ( j = 0; j < 3; j++)
                   {
                     while(write_or_read==0)
                           {
                                     fram_start_read();
                                    while(1);
                           }
                     delay_ms(100);
                   }
      //write start
       fram_start_write();
       while(1);
}
void delay_ms(unsigned int xms)
{
      unsigned int i,j;
      for(i=xms;i>0;i--)
            for(j=260;j>0;j--);         // 1.02s
}

//各初始化==================================
void Init_Device(void)
{

Port_IO_Init();
Oscillator_Init();
SPI_Init();
UART0_Init();
}

void Port_IO_Init()                         //done
{
      P0MDIN = 0xFF;       // P0端口都是数字输入
P0MDOUT = 0x10;       // P0.4
      P1MDIN = 0xF1;       // P1.1 ,P1.2,P1.3模拟输入
P1MDOUT = 0xD0;       // P1.4-SCK,P1.6-MOSI,P1.7-CS 推挽输出
      P2MDIN =       0xFF;       // P2端口都是数字输入
      P2MDOUT =       0x04;       //P2.2-CS 推挽输出
      P3MDIN =       0xFF;
      P3MDOUT = 0x00;

      P0SKIP =       0xCF;         // 端口0跳过引脚
P1SKIP = 0x0F;         // 端口1跳过引脚
      P2SKIP = 0xFF;         // 端口2跳过引脚
XBR0    = 0x05;         // UART,SPI连到端口引脚
XBR2    = 0x40;         // 使能交叉开关,弱上拉使能
}

void Oscillator_Init()         //done
{

OSCICN = 0xC7;             // 允许内部振荡器,不分频,24MHz

}

//       SBCON0 =0x43;
//       SBRLL0 =0x30;
//       SBRLH0 =0xFF;
//}                                                             // UART0的初始化子程序结束 57600
void UART0_Init()
{

      SCON0=0x10;
       if (SYSCLK/BAUDRATE/2/256 < 1) {
   TH1 = -(SYSCLK/BAUDRATE/2);
   CKCON |= 0x10;                // T1M = 1; SCA1:0 = xx
} else if (SYSCLK/BAUDRATE/2/256 < 4) {
   TH1 = -(SYSCLK/BAUDRATE/2/4);
   CKCON |=  0x01;                // T1M = 0; SCA1:0 = 01
   CKCON &= ~0x12;
} else if (SYSCLK/BAUDRATE/2/256 < 12) {
   TH1 = -(SYSCLK/BAUDRATE/2/12);
   CKCON &= ~0x13;                // T1M = 0; SCA1:0 = 00
} else {
   TH1 = -(SYSCLK/BAUDRATE/2/48);
   CKCON |=  0x02;                // T1M = 0; SCA1:0 = 10
   CKCON &= ~0x11;
}

TL1 = 0xff;                      // set Timer1 to overflow immediately
TMOD &= ~0xf0;                   // TMOD: timer 1 in 8-bit autoreload
TMOD |=  0x20;
TR1 = 1;                         // START Timer1
TI0 = 1;


}
void SPI_Init()
{
      SPI0CFG       =0x40; // 允许主方式,在SCK的第一个边沿采样数据,SCK在空闲时处于低电平
      SPI0CN             =0;         // 暂且禁止SPI0
      SPI0CKR             =0;
      ESPI0 = 0;                         // disable SPI interrupts
//       SPI0CKR=(SYSCLK/(2*SPI_CLOCK))-1; // SPI clock frequency equation from the datasheet
}

void fram_start_write()
{
      unsigned char i;

      SPI_Init();
      SPIEN=1;

       cs1=1;
       cs2=1;
       cs1=0;
       cs2=0;
       SPI_transfer(WREN);
       cs1=1;
       cs2=1;

       cs1=0;
       cs2=0;
       SPI_transfer(WRITE);

       SPI_transfer(0x00);        //开始地址
       SPI_transfer(0x00);
       SPI_transfer(0x00);
  for(i=10;i>0;i--)                      //要写的东西
  {
       SPI_transfer(0xAA);
       SPI_transfer(0xBB);
       SPI_transfer(0x00);
       SPI_transfer(0x01);
  }

       cs1=1;
       cs2=1;

       cs1=0;
       cs2=0;
       SPI_transfer(WRDI);
       cs1=1;
       cs2=1;

}
void fram_start_read()
{
      unsigned char k;
       while(choose_fram==1)               //fram 1
       {
            SPI_Init()       ;
            SPIEN=1;
            TR1=1;

            cs1=1;
            cs1=0;
            SPI_transfer(READ);
            SPI_transfer(0x00);                            // 首地址 00000H
            SPI_transfer(0x00);
            SPI_transfer(0x00);

            for(k=0;k<10;k++)
                  {
                               TI0 = 0;
                                SBUF0 = SPI_read();                                              // 发送8位数
                               while(!TI0);
                               TI0 = 0;
                     }
              cs1=1;
              TR1=0;
        }
}
void SPI_transfer(unsigned char SPI_byte)
{
          SPI0DAT=SPI_byte;
       while(TXBMT==0);
        SPIF=0;
       while(SPIF==0);
       SPIF=0;

}
char SPI_read()
{
      SPIF=0;
      SPI0DAT=0xFF;
      while(SPIF==0);
      SPIF=0;
      return(SPI0DAT);
}