EEPW论坛

1、overwrite不需要处理

2、buffer的地址传进来的时候是相对于base address的偏移，write函数内部需要调用map做映射。

用flash的基地址加偏移，基地址需要自己配置，偏移是函数传入的参数CardAddress address,

/*----------------------------------------------------------------------*/
/* i 2 8 f 0 1 6 W r i t e */
/* */
/* Write a block of bytes to Flash */
/* */
/* This routine will be registered as the MTD flash.write routine */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* address : Card address to write to */
/* buffer : Address of data to write */
/* length : Number of bytes to write */
/* overwrite : TRUE if overwriting old Flash contents */
/* FALSE if old contents are known to be erased */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/

static FLStatus i28f016Write(FLFlash vol,
CardAddress address,
const void FAR1 *buffer,
int length,
FLBoolean overwrite)
{
/* Set timeout ot 5 seconds from now */
unsigned long writeTimeout = flMsecCounter + 5000;

/* we need this to switch to the read window */


flashPtr = (FlashWPTR) vol.map(&vol, address,length);

DEBUG_PRINT("fxf:flashPtr=%s,buffer=%s,length=%s\n",flashPtr,buffer,length);
/* verify the data */
if (status == flOK && tffscmp((void FAR0 *) flashPtr,buffer,length)) {
#ifdef DEBUG_PRINT
DEBUG_PRINT("Debug: write failed for 8-bit Intel media in verification.\n");

#endif
status = flWriteFault;
}
sysFlashWriteDisable();
sysFlashWriteDisable1();
return status;
}

我没有看太仔细，没有发现什么问题，这里强行把vol.interleaving指定为2不知道会不会引起TFFS的反感，把你的identify函数贴出来看看吧

/*----------------------------------------------------------------------*/
/* i 2 8 f 0 1 6 I d e n t i f y */
/* */
/* Identifies media based on Intel 28F016 and registers as an MTD for */
/* such. */
/* */
/* This routine will be placed on the MTD list in custom.h. It must be */
/* an extern routine. */
/* */
/* On successful identification, the Flash structure is filled out and */
/* the write and erase routines registered. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* */
/* Returns: */
/* FLStatus : 0 on positive identificaion, failed otherwise */
/*----------------------------------------------------------------------*/

FLStatus i28f016Identify(FLFlash vol)
{
/*FlashWPTR flashPtr;/*by fxf */
FlashDPTR flashPtr;

#ifdef DEBUG_PRINT
DEBUG_PRINT("Debug: entering 16-bit Intel media identification routine.\n");
#endif
sysFlashWriteEnable();
sysFlashWriteEnable1();

flSetWindowBusWidth(vol.socket,32);
flSetWindowSpeed(vol.socket,120); /* 120 nsec. */
flSetWindowSize(vol.socket,2);

flashPtr = (FlashDPTR) flMap(vol.socket,0);

vol.noOfChips = 1;
flashPtr[0] = READ_ID;

if (flashPtr[0] == 0x00890089) {

/* Word mode */
vol.type = I28F016_FLASH;
vol.interleaving = 1;
flashPtr[0] = READ_ARRAY;
}
else {
/* Use standard identification routine to detect byte-mode */
flIntelIdentify(&vol, NULL,0);
if (vol.interleaving == 1)
vol.type = NOT_FLASH;
}

if (vol.type == I28F016_FLASH) {
vol.chipSize = TFFS_SIZE;
vol.erasableBlockSize = 0x20000L;
checkStatus(vol.interleaving == 1 ?
i28f016WordSize(&vol) :
flIntelSize(&vol, NULL,0));

/* Register our flash handlers */
vol.write = i28f016Write;
vol.erase = i28f016Erase;

#ifdef DEBUG_PRINT
DEBUG_PRINT("Debug: identified 16-bit Intel media.\n");
#endif
sysFlashWriteDisable();
sysFlashWriteDisable1();
return flOK;
}
else {
#ifdef DEBUG_PRINT
DEBUG_PRINT("Debug: failed to identify 16-bit Intel media.\n");
#endif
return flUnknownMedia; /* not ours */
}
}