Hi,
I read the flash manual about INTEL 28F640J3A.I know it has two
programming operations:Byte or Word.Byte is 8 bits and the Word is 16 bits.
but I refer some source code in PPCBOOT(/board/nx823/flash.c),I find a
strange thing:
#define FLASH_PORT_WIDTH ulong
#define FLASH_PORT_WIDTHV vu_long
#endif
#define FPW FLASH_PORT_WIDTH
#define FPWV FLASH_PORT_WIDTHV
............................
/*-----------------------------------------------------------------------
* Write a word or halfword to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_data (flash_info_t *info, ulong dest, FPW data)
{
FPWV *addr = (FPWV *)dest;
ulong status;
ulong start;
int flag;
.........................
flag = disable_interrupts();
*addr = (FPW)0x00400040; /* write setup */
*addr = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
........................
return (0);
}
Here,"data" is ulong and "*addr" is vu_long ,they are both 32 bits.Does
this mean programming operation is 32 bits?If so,it is opposition to the
FLASH manual.Why?
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