Hi,

I'm using a AT91SAM7S256's usart in order to program a communication via LIN bus, but here it's not my problem.
I need to store those data which come from the LIN transceiver into an external flash memory (AT25FS010N).

I think doing this with the SPI, but i wish i have advice.
My hardware configuration are :
PA12 -> SO
PA13 -> SI
PA14 -> SCK
PA29 -> CS


I'm new in AT91SAM7 world so forgive me if i do huge mistake :)

Here is my spi initialisation function:

static void spi_initialiser(){
pPMC->PMC_PCER=(1<<AT91C_ID_SPI);
*AT91C_PIOA_ASR=AT91C_PA12_MISO|AT91C_PA13_MOSI|AT91C_PA14_SPCK; // assign pins to SPI interface
*AT91C_PIOA_PDR=AT91C_PA12_MISO|AT91C_PA13_MOSI|AT91C_PA14_SPCK;
*AT91C_PIOA_PPUER=AT91C_PA12_MISO|AT91C_PA13_MOSI|AT91C_PA14_SPCK; // set pullups

//CHIP SELECT SETTINGS
pPIO->PIO_ASR=AT91C_PA29_NPCS0;
pPIO->PIO_PDR=AT91C_PA29_NPCS0;
pPIO->PIO_OER=AT91C_PA29_NPCS0;

pSPI->SPI_CR = (AT91C_SPI_SPIEN | AT91C_SPI_SWRST);
pSPI->SPI_CR = AT91C_SPI_SPIEN;
pSPI->SPI_MR = (AT91C_SPI_MSTR | AT91C_SPI_MODFDIS | AT91C_SPI_PS_FIXED | ((0x0)<<16));
pSPI->SPI_CSR[0] = (AT91C_SPI_CPOL | AT91C_SPI_NCPHA | AT91C_SPI_CSAAT | AT91C_SPI_BITS_8 | AT91C_SPI_SCBR | AT91C_SPI_SCBR | AT91C_SPI_DLYBCT);
}


So my question is, how can i do to write and read data into my external flash memory?
There is lot of things i don"t understand like the differnt block, pages ...
I see that i souhld write a spi_write function and certainly a spi_read function but how i do it ?


Thanks in advance, and sorry for my English :p
Regards,