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/*****************************************************************************/
/**
* @file xilflash_readwrite_example.c
*
*
* This file contains a design example using the Flash Library.
* This example tests the Erase, Read and Write features. The Page is erased
* and data is written to the page. The data is read back and compared with
* the data written for correctness.
*
* @note The Erase operation on a CFI compliant Flash device will result
* in an error if the block is locked.
* This example performs an Unlock operation before Erase operation
* only on the Intel CFI compliant Flash device. The AMD CFI
* compliant Flash devices require the user to apply a 12V DC
* voltage on the RP pin while performing the Lock and Unlock
* operations. This example will not work with the AMD compliant
* Flash devices if the block is locked and the user doesn't
* perform an Unlock operation.
*
*<pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- ---------------------------------------------------------
* 1.00a mta 10/09/07 First release
* 1.01a ksu 04/10/08 Added support for AMD CFI Interface
* 1.01a sdm 02/24/09 a) Added code to perform an Unlock operation before the
* Erase operation for Intel CFI compliant Flash devices
* b) Updated the notes with information about using the
* example with AMD CFI compliant Flash devices
* 2.00a ktn 12/04/09 Updated to use the HAL processor APIs/macros
* 3.00a sdm 03/03/11 Updated to pass BaseAddress and Flash Width to _Initialize
* API, as required by the new version of the library
*
*</pre>
******************************************************************************/
/***************************** Include Files *********************************/
#include <xilflash.h>
#include <stdio.h>
#include <xil_types.h>
/************************** Constant Definitions *****************************/
/*
* The following constants define the baseaddress and width the flash memory.
* These constants map to the XPAR parameters created in the xparameters.h file.
* They are defined here such that a user can easily change all the needed
* parameters in one place.
*/
#define FLASH_BASE_ADDRESS XPAR_EMC_0_MEM0_BASEADDR
/*
* The following constant defines the total byte width of the flash memory. The
* user needs to update this width based on the flash width in the design/board.
* The total flash width on some of the Xilinx boards is listed below.
* -------------------------------
* Board Width
* -------------------------------
* ML403 4 (32 bit)
* ML5xx 2 (16 bit)
* Spartan3S 1600E 2 (16 bit)
* Spartan-3A DSP 2 (16 bit)
* Spartan-3A 2 (16 bit)
* Spartan-3AN 2 (16 bit)
* ML605 2 (16 bit)
* SP605 2 (16 bit)
* SP601 1 (8 bit)
*/
#define FLASH_MEM_WIDTH 2
#define FLASH_TEST_SIZE 4048
#define START_ADDRESS 0x060000
#define BLOCK_OFFSET_ADDR 0x068000
/**************************** Type Definitions *******************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
int FlashReadWriteExample(void);
/************************** Variable Definitions *****************************/
XFlash FlashInstance; /* XFlash Instance. */
/*
* Buffers used during read and write transactions.
*/
u8 ReadBuffer[FLASH_TEST_SIZE]; /* Buffer used to store the data read. */
u8 WriteBuffer[FLASH_TEST_SIZE]; /* Write buffer. */
/************************** Function Definitions ******************************/
/*****************************************************************************/
/**
*
* Main function to execute the Flash read write example.
*
* @param None
*
* @return XST_SUCCESS if successful else XST_FAILURE.
*
* @note None.
*
******************************************************************************/
int main(void)
{
int Status;
Status = FlashReadWriteExample();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
return XST_SUCCESS;
}
/*****************************************************************************/
/**
*
* This function writes, reads, and verifies the data to the Flash device.
*
* @param None
*
* @return XST_SUCCESS if successful else XST_FAILURE.
*
* @note None.
*
******************************************************************************/
int FlashReadWriteExample(void)
{
int Status;
u32 Index;
/*
* Initialize the Flash Library.
*/
Status = XFlash_Initialize(&FlashInstance, FLASH_BASE_ADDRESS,
FLASH_MEM_WIDTH, 0);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Reset the Flash Device. This clears the Status registers and puts
* the device in Read mode.
*/
Status = XFlash_Reset(&FlashInstance);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform an unlock operation before the erase operation for the Intel
* Flash. The erase operation will result in an error if the block is
* locked.
*/
if ((FlashInstance.CommandSet == XFL_CMDSET_INTEL_STANDARD) ||
(FlashInstance.CommandSet == XFL_CMDSET_INTEL_EXTENDED)) {
Status = XFlash_Unlock(&FlashInstance, BLOCK_OFFSET_ADDR, 0);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
}
/*
* Perform the Erase operation.
*/
Status = XFlash_Erase(&FlashInstance, START_ADDRESS, FLASH_TEST_SIZE);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Prepare the write buffer. Fill in the data need to be written into
* Flash Device.
*/
for(Index = 0; Index < FLASH_TEST_SIZE; Index++) {
WriteBuffer[Index] = Index + 1;
}
/*
* Perform the Write operation.
*/
Status = XFlash_Write(&FlashInstance, START_ADDRESS, FLASH_TEST_SIZE,
WriteBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform the read operation.
*/
Status = XFlash_Read(&FlashInstance, START_ADDRESS, FLASH_TEST_SIZE,
ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Compare the data read against the data Written.
*/
for(Index = 0; Index < FLASH_TEST_SIZE; Index++) {
if(ReadBuffer[Index] != WriteBuffer[Index]) {
return XST_FAILURE;
}
}
return XST_SUCCESS;
}