data_flash.c

外部FLASH读写程序

#include"serprt30.h"
#include"math.h" 

//'注释：
  //'DB45BUSY = CLKR0;
  //'DB45CS = CLKX0;
  //'DB45SCLK = FSX0;
  //'SI = DX0; //'输出
  //'SO = FSR0;//'输入 
  //'DB45OE = DR0;
volatile SERIAL_PORT_REG *slpt = SERIAL_PORT_ADDR(0); 
extern unsigned int shu_cai_flag;
/*   //'串口控制寄存器    
spo->gcontrol = 0x04;//'串行口总体控制寄存器 
spo->s_x_control = 0x666;//'串行口发送控制寄存器 
spo->s_r_control = 0x020;//'串行口接收控制寄存器 
*/  
extern int nCurRotorNum_new;
extern int flash_write_buf[0x4000]; 


void busy_wait()
{ 
  unsigned int busy_bit; 
  busy_bit = read_status();
  while((busy_bit&0x80) != 0x80)
     busy_bit = read_status();  //'信号忙则等  
} 
unsigned int read_status()
{  
  unsigned int i,statusBuffer=0;   
  unsigned int statusComand;   
  statusComand = 0x57;
   //'串口选择模式0   
wait_busy:  
  if( slpt->s_r_control_bit.clkdati == 0)
      goto wait_busy; //' DB45BUSY 
  slpt->s_x_control_bit.clkdato = 1; //' DB45CS 
  slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK     
  delay_new(10); 
  slpt->s_x_control_bit.clkdato = 0; //' DB45CS 
  delay_new(10);                                     
  for(i=0;i<17;i++)
  {    
     if(i<8) 
     {
        if((statusComand&0x80) == 0x80)
           slpt->s_x_control_bit.ddatout = 1; //' SI 
        else 
           slpt->s_x_control_bit.ddatout = 0; //' SI     
        statusComand = statusComand<<1; 
     }     
     else if(i>8)
     {  
        statusBuffer<<=1;       
        if(slpt->s_r_control_bit.fsdatin == 1)    //' SO
            statusBuffer++;               
     }
     slpt->s_x_control_bit.fsdatout = 1; //' DB45CLK 
     delay_new(2);
     slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK      
  }
  delay_new(5); 
  slpt->s_x_control_bit.clkdato = 1; //' DB45CS 
  return(statusBuffer); 
} 
void read_mainMemoryPage(unsigned int  pageAddr, unsigned int  byteAddr,unsigned int wordLong)
{ 
  unsigned int i,j; 
  unsigned int readPageComand = 0x52;  
  int  *pBuffer; 
  int tempData = 0; 
  pBuffer = flash_write_buf;
  busy_wait();  
  slpt->s_x_control_bit.clkdato = 1; //' DB45CS 
  slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK
  slpt->s_x_control_bit.clkdato = 0; //' DB45CS  
  for(i=0;i<65;i++) 
  {      
     if(i<8) 
     {
       if((readPageComand&0x80) == 0x80)
           slpt->s_x_control_bit.ddatout = 1; //' SI  
       else 
          slpt->s_x_control_bit.ddatout = 0; //' SI          
       readPageComand <<= 1;        
     } 
     if((i>=8)&&(i<21))
     {
        if((pageAddr&0x1000) == 0x1000)
           slpt->s_x_control_bit.ddatout = 1; //' SI 
        else 
          slpt->s_x_control_bit.ddatout = 0; //' SI
        pageAddr <<= 1;                  
     }
     if((i>=21)&&(i<32))
     {
        if((byteAddr&0x400) == 0x400)
           slpt->s_x_control_bit.ddatout = 1; //' SI 
        else 
          slpt->s_x_control_bit.ddatout = 0; //' SI       
        byteAddr <<= 1;           
     }
     slpt->s_x_control_bit.fsdatout = 1; //' DB45CLK       
     delay_new(1);
     slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK    
  }
  for(i=0;i<wordLong;i++)
  {  
     *pBuffer = 0;     
     for(j=0;j<32;j++)
     {         
        *pBuffer <<= 1;  
        if(slpt->s_r_control_bit.fsdatin == 1)      
             *pBuffer = *pBuffer + 1; //' SO   
        slpt->s_x_control_bit.fsdatout = 1; //' DB45CLK      
        delay_new(4);
        slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK  
     }    
     pBuffer++;    
  }
  delay_new(5);
  slpt->s_x_control_bit.clkdato = 1; //' DB45CS
} 
void write_mainMemoryPage(unsigned int  pageAddr,unsigned int  byteAddr,unsigned int wordLong)
{
  unsigned int i,j; 
  unsigned int writePageComand = 0x53; // 'main->buffer1    
  int  *pBuffer,temp;  
  pBuffer = flash_write_buf; 
  temp = pageAddr;     
  busy_wait();
  slpt->s_x_control_bit.clkdato = 1; //' DB45CS 
  slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK
  slpt->s_x_control_bit.clkdato = 0; //' DB45CS  
  for(i=0;i<32;i++) 
  {     
     if(i<8) 
     {
       if((writePageComand&0x80) == 0x80)
           slpt->s_x_control_bit.ddatout = 1; //' SI 
       else 
          slpt->s_x_control_bit.ddatout = 0; //' SI         
       writePageComand <<= 1;        
     } 
     if((i>=8)&&(i<21))
     {
        if((pageAddr&0x1000) == 0x1000)
           slpt->s_x_control_bit.ddatout = 1; //' SI  
        else 
          slpt->s_x_control_bit.ddatout = 0; //' SI 
        pageAddr <<= 1;                  
     }    
     slpt->s_x_control_bit.fsdatout = 1; //' DB45CLK 
     delay_new(2);     
     slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK       
  } 
  pageAddr = temp;  
  writePageComand = 0x82; 
  slpt->s_x_control_bit.clkdato = 1; //' DB45CS
  busy_wait(); 
  slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK
  slpt->s_x_control_bit.clkdato = 0; //' DB45CS  
  for(i=0;i<32;i++) 
  {     
     if(i<8) 
     {
       if((writePageComand&0x80) == 0x80)
           slpt->s_x_control_bit.ddatout = 1; //' SI 
       else 
          slpt->s_x_control_bit.ddatout = 0; //' SI         
       writePageComand <<= 1;        
     } 
     if((i>=8)&&(i<21))
     {
        if((pageAddr&0x1000) == 0x1000)
           slpt->s_x_control_bit.ddatout = 1; //' SI  
        else 
          slpt->s_x_control_bit.ddatout = 0; //' SI 
        pageAddr <<= 1;                  
     }
     if(i>=21)
     {
        if((byteAddr&0x400) == 0x400)
           slpt->s_x_control_bit.ddatout = 1; //' SI 
        else 
          slpt->s_x_control_bit.ddatout = 0; //' SI          
        byteAddr <<= 1;           
     }
     slpt->s_x_control_bit.fsdatout = 1; //' DB45CLK 
     delay_new(2);     
     slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK       
  } 
  for(i=0;i<wordLong;i++)
  {       
     temp= *pBuffer;
     for(j=0;j<32;j++)
     {       
       if((temp&0x80000000) == 0x80000000)
           slpt->s_x_control_bit.ddatout = 1; //' SI 
       else 
          slpt->s_x_control_bit.ddatout = 0; //' SI      
       temp <<= 1; 
       slpt->s_x_control_bit.fsdatout = 1; //' DB45CLK 
       delay_new(3);  
       slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK     
     }
     pBuffer++;    
  }
  delay_new(5);
  slpt->s_x_control_bit.clkdato = 1; //' DB45CS
} 
void erase_mainMemoryPage(int  pageAddr,int comandFlag)
{
   unsigned int i,j = 1,k; 
   unsigned int erasePageComand ; //'也擦出    
   unsigned int buf1,buf2;    
   if(comandFlag == 0) 
   {
     erasePageComand = 0x81;
   }
   if(comandFlag == 1)
   {    
       erasePageComand = 0x50;        
   }
   if(comandFlag == 2)
   {    
       erasePageComand = 0x50; 
       j = 1024;       
   }
   buf1 = erasePageComand;
   buf2 =  pageAddr;
   for(k=0;k<j;k++,buf2=buf2+8)
   {  
     erasePageComand = buf1;
     pageAddr = buf2;
     busy_wait();
     slpt->s_x_control_bit.clkdato = 1; //' DB45CS 
     slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK
     slpt->s_x_control_bit.clkdato = 0; //' DB45CS   
     for(i=0;i<32;i++) 
     {    
       if(i<8) 
       {
          if((erasePageComand&0x80) == 0x80)
            slpt->s_x_control_bit.ddatout = 1; //' SI  
        else 
           slpt->s_x_control_bit.ddatout = 0; //' SI         
        erasePageComand <<= 1;        
       } 
       if((i>=8)&&(i<21))
       {
          if((pageAddr&0x1000) == 0x1000)
             slpt->s_x_control_bit.ddatout = 1; //' SI
          else 
             slpt->s_x_control_bit.ddatout = 0; //' SI
          pageAddr <<= 1;                  
       }
       slpt->s_x_control_bit.fsdatout = 1; //' DB45CLK      
       delay_new(2);
       slpt->s_x_control_bit.fsdatout = 0; //' DB45CLK
     }  
     delay_new(5);
     slpt->s_x_control_bit.clkdato = 1; //' DB45CS   
   } 
   busy_wait();
   
}