求助：xilinx EDK_flash 擦写读

yingsto

通过在xilinx EDk上编写flash的代码程序实现：（我的板子是spartan-3 2000，flash是intel 的J3）。
问题是这样的：
       按照下面的代码在xilinx EDK上能够的实现flash擦除、读写操作，并且通过超级终端进行验证，显示擦读写操作正确。
       那么按照这个程序应该实现了对开发板上flash的擦读写操作，开发板上的flash数据应该进行了更新。
       可是通过xilinx ISE编写.v文件去读取开发板上的flash，发现读取到的flash内容没有改变，和之前没有对flash进行更新之前的数据一样。

请教大家这是什么问题？非常谢谢！


代码如下：
/ Perform a Chip Erase, one block at a time
xil_printf("Erasing %d blocks, starting...\n\r", BLOCKS_TO_ERASE);
// Perform a Chip Erase
for(i = 0; i < BLOCKS_TO_ERASE; i ++)
//for(i = 0; i < 2; i ++)
{
  // Erase Sector command
        XIo_Out32(FLASHBASEADDR+(i*0x8000 << 2),0x00200020);
        XIo_Out32(FLASHBASEADDR+(i*0x8000 << 2),0x00D000D0);
  xil_printf("Erase block %d\r\n",i);
  XIo_Out32(FLASHBASEADDR + (i*0x8000 << 2),0x00700070);
  do
  {
   // Read status register
   TempWord32 = XIo_In32(FLASHBASEADDR + (i*0x8000 << 2));
   //xil_printf("Read status register %d : %x\n\r  ", i, TempWord32);
  }
  while( (TempWord32 & 0x00800080) != 0x00800080 );
}
xil_printf("\n\rSectors 0-%d erased\n\r", BLOCKS_TO_ERASE-1);
xil_printf("\n\rChip Erase complete - verifying\n\r");
    XIo_Out32(FLASHBASEADDR + (i*0x1000 << 1),0x00FF00FF);
// Verify Chip Erase
// Readback entire chip, comparing to 0xFFFFFFFF
    for (i = 0; i < FLASHWORDS; i++)
//for (i = 0; i < 1000; i++)
{
  DataWord32 = XIo_In32(FLASHBASEADDR + (i<<2) );//why i<<2 ?
// xil_printf("N0: %d   Data read was %x\n\r",i,DataWord32);
  
  if (DataWord32 != 0xFFFFFFFF)
  {
   xil_printf("Chip Erase Failed at %x\n\r", i);
   xil_printf("Data read was %x\n\r",DataWord32);
   error = 1;
   //i = TEST_WORDS;
  }
  
}

if(!error)
  xil_printf("Chip Erased successfully\n\n\r");

// Write Test using Word Program mode
    xil_printf("Data being written\n\r");
for (i = 0; i < FLASHWORDS; i++)
//for (i = 0; i < 20; i++)
{
        XIo_Out32(FLASHBASEADDR + (i<<2) ,0x00400040);
  XIo_Out32(FLASHBASEADDR + (i<<2) ,i*19);
        
  XIo_Out32(FLASHBASEADDR + i,0x00700070);
  do
  {
   // Read status register command
   TempWord32 = XIo_In32(FLASHBASEADDR + i);
      //xil_printf("%d  ----%x \n\r ", i,TempWord32);
  }
  while( (TempWord32 & 0x00800080) != 0x00800080 );
}
xil_printf("Test Data Written; reading back\n\r", i);
    XIo_Out32(FLASHBASEADDR +100,0x00FF00FF);
// Readback
error = 0;
for (i = 0; i < FLASHWORDS;i++ )
//for (i = 0; i <20;i++)
{
  DataWord32 = XIo_In32(FLASHBASEADDR + (i<<2));// read mode?
  //xil_printf("%d Data read was %x\n\r",i,DataWord32);  
  
  TestWord32 =i*19;
  if (DataWord32 != TestWord32)
  {
   xil_printf("Flash Test FAILED at 0x%x\n\r", i);
   xil_printf("Data read was 0x%x\n\r",DataWord32);
   xil_printf("Exp. Data was 0x%x\n\r",TestWord32);
   error = 1;
   i = FLASHWORDS;
  }
  
  
}
if(!error)
{
  xil_printf("Flash Test PASSED!\n\r");
  xil_printf("Ending Address Read was 0x%x\n\r", i);
  xil_printf("Last Data Read was %x\n\r", DataWord32);
}

ADC916

thanks for sharing

yuanwolf2008

期待高手，，，

咫尺天涯1124

楼主你好，请问你这篇帖子资料还有么？本人目前正在调试flash，不太懂。