[原创] LPC1114 接64Mb FLASH 程序与图片，待完善

lanyu345 2010-5-7 16:31 楼主

编的程序，有待完善，共同探讨！！！！！
顺便秀一下 MAQ PC91 的无线耳麦，下午刚到！！！共同交流！！！
extern  void WRITE_M_BYTE(uint8_t  M_BYTE ) //write  instruction  to flash
{
uint8_t j,commd;
flash_cs0;
asm("nop");
asm("nop");
flash_sclk0;
  for(j=0;j<8;j++)
   {
   commd=(M_BYTE>>j)%2;
  if(commd==0x01)
  {
      flash_din1;
  }
else
   flash_din0;
   flash_sclk1;       //the instructions are latched on the rising edge                            //of serial clock
   asm("nop");
   asm("nop");
asm("nop");
   asm("nop");
   flash_sclk0;
asm("nop");
   asm("nop");
   }
}
extern  uint8_t  READ_M_BYTE()    //read  one byte from  flash
{
uint8_t i ,R_flash_data;
for(i=0;i<8;i++)
{
asm("nop");
   asm("nop");
   dr= LPC_GPIO[PORT3]->MASKED_ACCESS[(1<<0)];
   dr=(dr>>8)%2;
   din[0]=dr;
   if(din[0]==0x01)
         {
         R_flash_data<<=1;
         R_flash_data|=0x01;
         }
      else
         {
         R_flash_data<<=1;
         R_flash_data|=0x00;
            }
   flash_sclk1;                //data is shifted out on the falling edge of
                                 //serial  clock.
         asm("nop");
         asm("nop");
   asm("nop");
         asm("nop");
   flash_sclk0;
         asm("nop");
         asm("nop");
   asm("nop");
         asm("nop");
   asm("nop");
         asm("nop");
}
return  R_flash_data;
}

extern  void  flash_busy()  //busy or not
{
uint8_t busy=0x01;
flash_cs1;
WRITE_M_BYTE(RDSR) ; //Read  status  register  instruction
  do{
   busy=0x01;
   busy=READ_M_BYTE() ; //Read status  byte.
   busy&=0x01;
}
while(busy==0x01);
  flash_cs1;
  asm("nop");
   asm("nop");
  asm("nop");
   asm("nop");
}

extern  void  R_gps_flash(uint8_t  count,uint8_t *address) //read  the  gps  information form  flash
{
  uint8_t  i;
  WRITE_M_BYTE(WREN) ;       //write  Enable  instruction;
  flash_busy();             //busy  or  not
  flash_cs1;
  WRITE_M_BYTE(READ);
  write_flashadd(address); //WRITE THE INITIAL ADDRESS FOR READING
  for(i=0;i<count;i++)
   {
gps905=READ_M_BYTE();
}
  flash_cs1;
  flash_busy();
  //WRITE_M_BYTE(WRDI) ;    //the write disable instruction resets the write enable latch bit.
}