lowlvl.c

在flash上实现vsb文件系统的源码资料

#ifndef EXCLUDE_VSB

#include "..\ucos\ucos_ii.h"
#include "..\bsp\flash.h"
#include "datatype.h"
#include "flashdef.h"
#include "lowlvl.h"

WORD FlashDevCompatCheck(MEDIA_INFO *pInfo)
{
	FLASH_INFO info;

	if (flash_info(&info) < 0) {
		return (ERR_JEDEC);
	}

#if 1
	/* VSB configurations do NOT match with Flash memory driver's */
	if ((info.chip_size != COMPONENT_SIZE) || (info.blk_size != BLOCK_SIZE)) {
		return (ERR_JEDEC);
	}
#endif

	if (pInfo) {
		pInfo->media_size = info.chip_size;
		pInfo->block_size = info.blk_size;
		pInfo->number_blocks = (info.chip_size/info.blk_size);
		pInfo->media_type = NO_ERASE_SUSPEND_MASK;	/* Erase suspend is unsupported */
		pInfo->manfct_id = info.man_id;
		pInfo->device_id = info.dev_id;
	}
	return (ERR_NONE);
}

WORD FlashDevEraseBlock(DWORD address)
{
	if (flash_erase(address) < 0) {
		return (ERR_ERASE);
	}
	return (ERR_NONE);
}

WORD FlashDevRead(DWORD address, DWORD length, BYTE_PTR buffer)
{
	if (flash_read(address, buffer, length) < 0) {
		return (ERR_READ);
	}
	return (ERR_NONE);
}

WORD FlashDevWrite(DWORD address, DWORD length, BYTE_PTR buffer)
{
	if (flash_write(address, buffer, length) < 0) {
		return (ERR_WRITE);
	}
	return (ERR_NONE);
}

#else

static const char file_name[] = "lowlvl.c";

#endif /* EXCLUDE_VSB */