hi all,

Im developing with the AT91Sam7x256-ek and the GNU toolchain with SAMBA. I want to access the spi dataflash on the board.

At first i tried to adept the spi-flash example from the at91lib from AT26 to AT45 flash.

I can read the JEDEC Id successful, but when i want to write and read data (AT45D_Write, AT45D_Read), i dont get any valid results. Meaning if i write "Hello World" and try to read from the equal adress, i only get bytes like 0xFF. I know that most dataflashes contain FF in the erased state. Thats why i assume that the read works, but the write still causes problems.

After that i tried to go on myself using the periphals/spi functions to access the flash. But i didnt make it work so far.

Here is my initialisation: (i think its correct because i get the right JEDEC id)

static Pin pins[] = {BOARD_AT45_B_SPI_PINS, BOARD_AT45_B_NPCS_PIN};

unsigned int csr = (0x0F<<16) | (0x60<<8) | /* AT91C_SPI_NCPHA | */ AT91C_SPI_CPOL;

// Initialize the SPI and serial flash
PIO_Configure(pins, PIO_LISTSIZE(pins));

AIC_DisableIT(BOARD_AT45_B_SPI_ID);
AIC_ConfigureIT(BOARD_AT45_B_SPI_ID, AT91C_AIC_PRIOR_LOWEST, ISR_Spi);

SPID_Configure(&spid, BOARD_AT45_B_SPI_BASE, BOARD_AT45_B_SPI_ID);

SPID_ConfigureCS(&spid, BOARD_AT45_B_NPCS, csr );

AT45_Configure(&at45, &spid, BOARD_AT45_B_NPCS);

AIC_EnableIT(BOARD_AT45_B_SPI_ID);

jedecId = AT45D_GetStatus(&at45);

printf("SPI and AT45 drivers initialized\n\r");

if ( AT45_FindDevice(&at45, jedecId))
{
printf("%s serial flash(0x%x) detected\n\n\r", at45.pDesc->name, jedecId);
}
else
{
printf("No Device(0x%x) found!...\n\n\r",jedecId); while (1);
}

**************************************

My question is if anyone else has problems with the AT45D from the at91lib, or even better, a working solution .

I hope gave enough information.

Thanks in advance,

Sam