/** * \brief Translates address/size access of a nand_flash_model to block, page * and offset values. * * \param model nand_flash_model instance. * \param address Access address. * \param size Access size in bytes. * \param block Stores the first accessed block number. * \param page Stores the first accessed page number inside the first block. * \param offset Stores the byte offset inside the first accessed page. * * \return 0 if the access is correct; otherwise returns * NAND_COMMON_ERROR_OUTOFBOUNDS. * * \note The values are stored in the provided variables if their pointer is * not 0. */ uint32_t nand_flash_model_translate_access(const struct nand_flash_model *model, uint32_t address, uint32_t size, uint16_t *block, uint16_t *page, uint16_t *offset) { /* Check that access is not too big */ if ((address + size) > nand_flash_model_get_device_size_in_bytes(model)) { return NAND_COMMON_ERROR_OUTOFBOUNDS; } /* Get NAND info */ uint32_t block_size = nand_flash_model_get_block_size_in_bytes(model); uint32_t page_size = nand_flash_model_get_page_data_size(model); /* Translate address */ uint16_t temp_block = address / block_size; address -= (temp_block * block_size); uint16_t temp_page = address / page_size; address -= (temp_page * page_size); uint16_t temp_Offset = address; /* Save results */ if (block) { *block = temp_block; } if (page) { *page = temp_page; } if (offset) { *offset = temp_Offset; } return 0; }
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 */ } }