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156
CHAPTER 5
Device drivers
Permitted values for parameter pPhyType
FS_NAND_PHY_x
FS_NAND_PHY_x8
FS_NAND_PHY_DataFlash
Supports the following NAND devices:
- 512 bytes per page and 8-bit width
- 2048 bytes per page and 8-bit width
- 2048 bytes per page and 16-bit width
Supports the following NAND devices:
- 512 bytes per page and 8-bit width
- 2048 bytes per page and 8-bit width
Supports ATMEL DataFlashes. The physical layer driver accesses these chips
using the SPI mode. To use the driver
with ATMEL DataFlash chips in your system, you will have to provide basic I/O
functions which are divergend to the
hardware functions of the other physical
layers. Refer to ...
Additional information
This function needs to be called for every NAND device added.
Example
Refer to “Adding the driver to µC/FS” on page 155 for an example.
FS_NAND_SetBlockRange()
Description
Sets a limit for which blocks of the NAND flash can be controlled by the driver.
Prototype
void FS_NAND_SetBlockRange(U8 Unit, U16 FirstBlock, U16 MaxNumBlocks);
Parameter
Meaning
Unit number (0…N).
Zero-based index of the first block to use.
Specifies the number of blocks at the beginning of the device to
FirstBlock
skip. 0 means that no blocks are skipped.
Maximum number of blocks to use.
MaxNumBlocks
0 means use all blocks after FirstBlock.
Unit
Table 5.9: FS_NAND_SetBlockRange() parameter list
Additional information
This function is optional. By default, the driver controls all blocks of the NAND flash,
making the entire NAND flash available. If a part of the NAND flash should be used
for another purpose (for example to store the application program used by a bootloader) and therefore is not controlled by the driver, this function can be used. Limiting the number of blocks used by the driver also reduces the amount of memory used
by the driver.
Example
Refer to “Adding the driver to µC/FS” on page 155 for an example.
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