/**
* \brief Initialize a nand_flash_ecc instance.
*
* \param ecc Pointer to an nand_flash_ecc instance.
* \param model Pointer to the underlying NAND chip model. Can be 0.
* \param command_address Address at which commands are sent.
* \param address_address Address at which addresses are sent.
* \param data_address Address at which data is sent.
*
* \return 0 if the initialization is done; or return the error code.
*/
uint32_t nand_flash_ecc_initialize(struct nand_flash_ecc *ecc,
const struct nand_flash_model *model,
uint32_t command_address,
uint32_t address_address, uint32_t data_address)
{
uint32_t rc;
rc = nand_flash_raw_initialize(RAW(ecc),
model, command_address, address_address, data_address);
return rc;
}
int main(void)
{
uint16_t block, page;
uint32_t i;
uint32_t error = 0;
/* Initialize the SAM3 system */
sysclk_init();
board_init();
/* Initialize the console uart */
configure_console();
/* Output example information */
printf("-- NAND Flash Raw Example --\n\r");
printf("-- %s\n\r", BOARD_NAME);
printf("-- Compiled: %s %s --\n\r", __DATE__, __TIME__);
memset(&nf_raw, 0, sizeof(nf_raw));
if (nand_flash_raw_initialize(&nf_raw, 0, cmd_address,
addr_address, data_address)) {
printf("-E- Device Unknown\n\r");
return 0;
}
printf("-I- NAND Flash driver initialized\n\r");
/* Get device parameters */
mem_size = nand_flash_model_get_device_size_in_bytes(&nf_raw.model);
block_size = nand_flash_model_get_block_size_in_bytes(&nf_raw.model);
num_block = nand_flash_model_get_device_size_in_blocks(&nf_raw.model);
page_size = nand_flash_model_get_page_data_size(&nf_raw.model);
pages_per_block =
nand_flash_model_get_block_size_in_pages(&nf_raw.model);
printf("-I- Size of the whole device in bytes : 0x%x \n\r", mem_size);
printf("-I- Size in bytes of one single block of a device : 0x%x \n\r",
block_size);
printf("-I- Number of blocks in the entire device : 0x%x \n\r",
num_block);
printf("-I- Size of the data area of a page in bytes : 0x%x \n\r",
page_size);
printf("-I- Number of pages in the entire device : 0x%x \n\r",
pages_per_block);
/* Erase all block and use the last good block for read/write test */
for (i = 0; i < num_block; i++) {
error = nand_flash_raw_erase_block(&nf_raw, i);
if (error == NAND_COMMON_ERROR_BADBLOCK) {
printf("-E- Block %u is BAD block. \n\r", i);
} else {
block = i;
}
}
/* Prepare a page size buffer in SRAM. */
printf("-I- Preparing a buffer in SRAM ...\n\r");
for (i = 0; i < page_size; i++) {
write_buffer[i] = i & 0xFF;
}
/* Reset read buffer. */
memset(read_buffer, 0, sizeof(read_buffer));
/* Select a page. */
page = 0;
/* Write a page to the NAND Flash. */
printf("-I- Write the buffer in page %d of block %d without ECC.\n\r",
page, block);
error = nand_flash_raw_write_page(&nf_raw, block, page, write_buffer,
0);
if (error) {
printf("-E- Cannot write page %d of block %d.\n\r", page,
block);
return error;
}
/* Read the page from the NAND Flash. */
printf("-I- Read page %d of block %d without ECC.\n\r", page, block);
nand_flash_raw_read_page(&nf_raw, block, page, read_buffer, 0);
/* Test if the read buffer is the same as SRAM buffer */
error = memcmp(read_buffer, write_buffer, sizeof(write_buffer));
if (error) {
printf("-I- Read data is different from write data.\n\r");
printf("-I- Need ECC module when handle this page.\n\r");
return 0;
}
printf("-I- Read data matches write data.\n\r");
printf("-I- Test passed.\n\r");
while (1) {
/* Do nothing */
}
}