nand.c

来自「嵌入式linux（arm9）的平台下」· C语言 代码 · 共 46 行

#include "example.h"
#include "nand.h"

static uint8 nand_buffer[NAND_DATA_BLOCK_SIZE];
static int nand_buffer_index = 0;
static int nand_block_offset = 0;
static NandDevice* nand_device = 0;

int nandClose()
{
	DPRINTF("%s\n", __FUNCTION__);
	return 1;
}

int nandOpen(const char* block)
{
	int result = 0;
	DPRINTF("%s\n", __FUNCTION__);
	nand_buffer_index = NAND_DATA_BLOCK_SIZE;	//Start at end of buffer
	nand_block_offset = strtol((char*) &block[5], NULL, 16);

	if(nand_device = nand_initialize())
		result = 1;

	return result;
}

int nandRead(void* buffer, int size)
{
	//DPRINTF("%s\n", __FUNCTION__);
	int i;

	for(i = 0; i < size; ++i)
	{
		if(nand_buffer_index == NAND_DATA_BLOCK_SIZE)
		{
			nand_buffer_index = 0;
			nand_read(nand_buffer, NAND_DATA_BLOCK_SIZE, nand_block_offset++, 0);
		}

		((uint8*)buffer)[i] = nand_buffer[nand_buffer_index++];
	}
	
	return size;
}