nandps
Vitis Drivers API Documentation
Macros | Functions | Variables
xnandps_cache_example.c File Reference

Overview

This file contains a design example using the NAND driver (XNandPs).

This example tests NAND page cache read and write commands. The page cache commands are not supported by OnDie ECC flash since ECC is enabled by default. Tested Spansion S34ML04G100TFI00 flash with this example.

This example tests the block erase, block read and block write features. The flash blocks are erased and written. The data is read back and compared with the data written for correctness. The bad blocks are not erased/programmed.

Note

None.

 MODIFICATION HISTORY:
 Ver   Who  Date        Changes






 1.00  nm   04/25/2013  First release.
       ms   04/10/17    Modified Comment lines to follow doxygen rules
 2.8  akm   07/06/23    Add support for system device-tree flow.

Macros

#define NAND_TEST_START_BLOCK   64
 Starting block to test. More...
 
#define NAND_TEST_NUM_BLOCKS   16
 Number of blocks to test. More...
 
#define NAND_TEST_BLOCK_SIZE   0x20000
 Test Block Size, must be same as the flash block size. More...
 

Functions

int NandReadWriteCacheExample (u32 NandDeviceId)
 This function runs a test on the NAND flash device using the basic driver functions. More...
 
int main (void)
 Main function to execute the Nand Flash read write example. More...
 

Variables

u8 ReadBuffer [NAND_TEST_BLOCK_SIZE]
 Block sized Read buffer. More...
 
u8 WriteBuffer [NAND_TEST_BLOCK_SIZE]
 Block sized write buffer. More...
 

Macro Definition Documentation

#define NAND_TEST_BLOCK_SIZE   0x20000

Test Block Size, must be same as the flash block size.

Referenced by NandReadWriteCacheExample().

#define NAND_TEST_NUM_BLOCKS   16

Number of blocks to test.

Referenced by NandReadWriteCacheExample().

#define NAND_TEST_START_BLOCK   64

Starting block to test.

Referenced by NandReadWriteCacheExample().

Function Documentation

int main ( void  )

Main function to execute the Nand Flash read write example.

Returns
  • XST_SUCCESS if the example has completed successfully.
  • XST_FAILURE if the example has failed.
Note
None.

References NandReadWriteCacheExample().

int NandReadWriteCacheExample ( u32  NandDeviceId)

This function runs a test on the NAND flash device using the basic driver functions.

The function does the following tasks:

  • Initialize the driver.
  • Erase the blocks.
  • Write in to all the blocks.
  • Read back the data from the blocks.
  • Compare the data read against the data Written.
Parameters
NandDeviceIdis is the XPAR_<NAND_instance>_DEVICE_ID value from xparameters.h.
Returns
  • XST_SUCCESS if successful.
  • XST_FAILURE if failed.
Note
When bad blocks are encountered, they are not erased and programmed.

References XNandPs_Geometry::BlockSize, XNandPs_Config::FlashBase, XNandPsTag::Geometry, NAND_TEST_BLOCK_SIZE, NAND_TEST_NUM_BLOCKS, NAND_TEST_START_BLOCK, ReadBuffer, XNandPs_Config::SmcBase, WriteBuffer, XNandPs_CfgInitialize(), XNandPs_EraseBlock(), XNandPs_IsBlockBad(), XNandPs_LookupConfig(), XNandPs_ReadCache(), and XNandPs_WriteCache().

Referenced by main().

Variable Documentation

u8 ReadBuffer[NAND_TEST_BLOCK_SIZE]

Block sized Read buffer.

Referenced by NandReadWriteCacheExample(), NandReadWriteExample(), and NandSkipBlockExample().

u8 WriteBuffer[NAND_TEST_BLOCK_SIZE]

Block sized write buffer.

Referenced by NandReadWriteCacheExample(), NandReadWriteExample(), and NandSkipBlockExample().