/**
*
* This function waits till the Serial Flash is ready to accept next command.
*
* @param None.
*
* @return XST_SUCCESS if successful else XST_FAILURE.
*
* @note This function reads the status register of the Serial Flash and
waits till the WIP bit of the status register becomes 0.
*
******************************************************************************/
int IsfWaitForFlashNotBusy(void)
{
int Status;
u8 StatusReg;
while(1) {
/*
* Get the Status Register.
*/
Status = XIsf_GetStatus(&Isf, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Check if the flash is ready to accept the next command.
* If so break.
*/
StatusReg = ReadBuffer[BYTE2];
if((StatusReg & XISF_SR_IS_READY_MASK) == 0) {
break;
}
}
return XST_SUCCESS;
}
/**
*
* This function waits till the Intel Serial Flash is ready to accept next
* command.
*
* @param None
*
* @return XST_SUCCESS if successful else XST_FAILURE.
*
* @note This function reads the Status Register of the Serial Flash and
* waits till the WIP bit of the Status Register becomes 0.
*
******************************************************************************/
int IsfWaitForFlashNotBusy(void)
{
int Status;
u8 StatusReg;
while(1) {
/*
* Get the Status Register.
*/
TransferInProgress = TRUE;
Status = XIsf_GetStatus(&Isf, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is in progress.
*/
while(TransferInProgress);
/*
* Check if there are any errors in the transaction.
*/
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Check if the flash is ready to accept the next command.
*/
StatusReg = ReadBuffer[BYTE2];
if((StatusReg & XISF_SR_IS_READY_MASK) == 0) {
/*
* If there were errors return XST_FAILURE.
*/
if (StatusReg & (XISF_SR_PROG_FAIL_MASK |
XISF_SR_ERASE_FAIL_MASK)) {
return XST_FAILURE;
}
break;
}
}
return XST_SUCCESS;
}
/**
*
* This function waits till the Serial Flash is ready to accept next command.
*
* @param None
*
* @return XST_SUCCESS if successful else XST_FAILURE.
*
* @note None.
*
******************************************************************************/
static int IsfWaitForFlashNotBusy()
{
int Status;
u8 StatusReg;
u8 ReadBuffer[2];
while(1) {
/*
* Get the Status Register.
*/
TransferInProgress = TRUE;
Status = XIsf_GetStatus(&Isf, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check for any errors.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Check if the Serial Flash is ready to accept the next
* command. If so break.
*/
StatusReg = ReadBuffer[BYTE2];
if(StatusReg & XISF_SR_IS_READY_MASK) {
break;
}
}
return XST_SUCCESS;
}
/**
*
* This function initializes the instance structure with the device geometry of
* the Atmel Serial Flash if it is an Atmel device.
*
* @param InstancePtr is a pointer to the XIsf instance.
* @param BufferPtr is a pointer to the memory where the device info of
* the Serial Flash is present.
*
* @return - XST_SUCCESS if device information matches the JEDEC
* information of the Atmel Serial Flash.
* - XST_FAILURE if the device information doesn't match with Atmel
* Serial Flash.
*
* @note None
*
******************************************************************************/
static int AtmelFlashInitialize(XIsf *InstancePtr, u8 *BufferPtr)
{
int Status;
u32 Index;
u8 StatusRegister;
u8 NumOfDevices;
u8 ManufacturerID;
ManufacturerID = BufferPtr[BYTE2];
if (ManufacturerID == XISF_MANUFACTURER_ID_ATMEL) {
/*
* For Atmel Serial Flash the device code is the 3rd byte of the
* JEDEC info.
*/
InstancePtr->DeviceCode = BufferPtr[BYTE3];
/*
* Get the Status Register contents.
* The IsReady is temporarily made TRUE to fetch the Status
* Register contents.
*/
InstancePtr->IsReady = TRUE;
Status = XIsf_GetStatus(InstancePtr, BufferPtr);
InstancePtr->IsReady = FALSE;
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait until the transfer is complete.
*/
do {
#ifndef XPAR_XISF_INTERFACE_PSQSPI
Status =
InstancePtr->XIsf_Iface_SetSlaveSelect(InstancePtr->SpiInstPtr,
InstancePtr->SpiSlaveSelect);
#else
Status =
InstancePtr->XIsf_Iface_SetSlaveSelect(InstancePtr->SpiInstPtr);
#endif
} while(Status == XST_DEVICE_BUSY);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
StatusRegister = BufferPtr[BYTE2];
/*
* Get the Address mode from the Status Register of the Serial
* Flash.
*/
InstancePtr->AddrMode = StatusRegister & XISF_SR_ADDR_MODE_MASK;
/*
* Update the Serial Flash instance structure with device
* geometry.
*/
NumOfDevices = sizeof(AtmelDevices) /
sizeof(AtmelDeviceGeometry);
for(Index = 0; Index < NumOfDevices; Index++) {
if (InstancePtr->DeviceCode == AtmelDevices[Index].
DeviceCode) {
/*
* Default address mode device.
*/
if (InstancePtr->AddrMode ==
XISF_DEFAULT_ADDRESS) {
InstancePtr->BytesPerPage =
AtmelDevices [Index].
BytesPerPageDefaultMode;
} else {
/*
* Power of 2 address mode device.
*/
InstancePtr->BytesPerPage =
AtmelDevices [Index].
BytesPerPagePowerOf2Mode;
}
InstancePtr->PagesPerBlock =
AtmelDevices[Index].PagesPerBlock;
InstancePtr->BlocksPerSector =
AtmelDevices[Index].BlocksPerSector;
InstancePtr->NumOfSectors =
AtmelDevices[Index].NumOfSectors;
if (InstancePtr->BytesPerPage >
XISF_BYTES1024_PER_PAGE ) {
InstancePtr->ByteMask =
XISF_BYTES2048_PER_PAGE_MASK;
}
else if (InstancePtr->BytesPerPage >
XISF_BYTES512_PER_PAGE ) {
InstancePtr->ByteMask =
XISF_BYTES1024_PER_PAGE_MASK;
}
else if (InstancePtr->BytesPerPage >
XISF_BYTES256_PER_PAGE ) {
InstancePtr->ByteMask =
XISF_BYTES512_PER_PAGE_MASK;
}
else {
InstancePtr->ByteMask =
XISF_BYTES256_PER_PAGE_MASK;
}
InstancePtr->IsReady = TRUE;
}
}
}
/*
* If the device is not supported, return Failure.
*/
if (InstancePtr->IsReady != TRUE) {
return XST_FAILURE;
}
return XST_SUCCESS;
}
/**
*
* Main function to execute the Intel Serial Flash SPR example.
*
* @param None
*
* @return XST_SUCCESS if successful else XST_FAILURE.
*
* @note None
*
******************************************************************************/
int main()
{
int Status;
u32 Index;
u32 Address;
u8 StatusReg;
XIsf_WriteParam WriteParam;
XIsf_ReadParam ReadParam;
/*
* Initialize the SPI driver so that it's ready to use,
* specify the device ID that is generated in xparameters.h.
*/
Status = XSpi_Initialize(&Spi, SPI_DEVICE_ID);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Connect the SPI driver to the interrupt subsystem such that
* interrupts can occur. This function is application specific.
*/
Status = SetupInterruptSystem(&Spi);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Setup the handler for the SPI that will be called from the interrupt
* context when an SPI status occurs, specify a pointer to the SPI
* driver instance as the callback reference so the handler is able to
* access the instance data.
*/
XIsf_SetStatusHandler(&Isf, &Spi, (XSpi_StatusHandler)SpiHandler);
/*
* Start the SPI driver so that interrupts and the device are enabled.
*/
XSpi_Start(&Spi);
/*
* Initialize the Serial Flash Library.
*/
Status = XIsf_Initialize(&Isf, &Spi, ISF_SPI_SELECT, IsfWriteBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Set The transfer Mode to Interrupt
*/
XIsf_SetTransferMode(&Isf,XISF_INTERRUPT_MODE);
/*
* Perform the Write Enable operation.
*/
TransferInProgress = TRUE;
Status = XIsf_WriteEnable(&Isf, XISF_WRITE_ENABLE);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Read the sector protection register.
*/
TransferInProgress = TRUE;
Status = XIsf_SectorProtect(&Isf, XISF_SPR_READ, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Clear all the block protection bits in the sector protection register
* value read above.
*/
WriteBuffer[BYTE1] = ReadBuffer[BYTE2] &
(~(XISF_SR_BLOCK_PROTECT_MASK));
/*
* Write this value to the sector protection register to disable the
* sector protection.
*/
TransferInProgress = TRUE;
Status = XIsf_SectorProtect(&Isf, XISF_SPR_WRITE, WriteBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Specify the address in the Serial Flash for the Erase/Write/Read
* operations.
*/
Address = ISF_TEST_ADDRESS;
/*
* Perform the Write Enable operation.
*/
TransferInProgress = TRUE;
Status = XIsf_WriteEnable(&Isf, XISF_WRITE_ENABLE);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform the Sector Erase operation.
*/
TransferInProgress = TRUE;
Status = XIsf_Erase(&Isf, XISF_SECTOR_ERASE, Address);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform the Write Enable operation.
*/
TransferInProgress = TRUE;
Status = XIsf_WriteEnable(&Isf, XISF_WRITE_ENABLE);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* - Set the address within the Serial Flash where the data is to be
* written.
* - Set the number of bytes to be written to the Serial Flash.
* - Write Buffer which contains the data to be written to the Serial
* Flash.
*/
WriteParam.Address = Address;
WriteParam.NumBytes = ISF_PAGE_SIZE;
WriteParam.WritePtr = WriteBuffer;
/*
* Prepare the write buffer. Fill in the data need to be written into
* Serial Flash.
*/
for(Index = 0; Index < ISF_PAGE_SIZE; Index++) {
WriteParam.WritePtr[Index] = Index + ISF_TEST_BYTE;
}
/*
* Perform the Write operation.
*/
TransferInProgress = TRUE;
Status = XIsf_Write(&Isf, XISF_WRITE, (void*) &WriteParam);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform the Write Enable operation.
*/
TransferInProgress = TRUE;
Status = XIsf_WriteEnable(&Isf, XISF_WRITE_ENABLE);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Read the sector protection register.
*/
TransferInProgress = TRUE;
Status = XIsf_SectorProtect(&Isf, XISF_SPR_READ, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Set all the block protection bits in the sector protection register
* value read above and write it back to the sector protection register.
*/
WriteBuffer[BYTE1] = ReadBuffer[BYTE2] |
(XISF_SR_BLOCK_PROTECT_MASK);
/*
* Enable the sector protection.
*/
TransferInProgress = TRUE;
Status = XIsf_SectorProtect(&Isf, XISF_SPR_WRITE, WriteBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform the Write Enable operation.
*/
TransferInProgress = TRUE;
Status = XIsf_WriteEnable(&Isf, XISF_WRITE_ENABLE);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform the Sector Erase operation. This should not work as writes to
* the Serial Flash are disabled.
*/
TransferInProgress = TRUE;
Status = XIsf_Erase(&Isf, XISF_SECTOR_ERASE, Address);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Read the Status Register.
*/
TransferInProgress = TRUE;
Status = XIsf_GetStatus(&Isf, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is in progress.
*/
while(TransferInProgress);
/*
* Check if there are any errors in the transaction.
*/
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Check if the erase fail flag is set in the status register. This flag
* should be set as a sector erase operation was attempted when sector
* protection was enabled.
*/
StatusReg = ReadBuffer[BYTE2];
if((StatusReg & XISF_SR_ERASE_FAIL_MASK) == 0) {
return XST_FAILURE;
}
/*
* Clear the status register fail flags in the Serial Flash status
* register.
*/
TransferInProgress = TRUE;
Status = XIsf_Ioctl(&Isf, XISF_IOCTL_CLEAR_SR_FAIL_FLAGS);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Read the Status Register.
*/
TransferInProgress = TRUE;
Status = XIsf_GetStatus(&Isf, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is in progress.
*/
while(TransferInProgress);
/*
* Check if there are any errors in the transaction.
*/
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Check if the erase fail flag is clear in the status register. This
* flag should be clear as a 'Clear SR Fail Flags' command has been
* executed.
*/
StatusReg = ReadBuffer[BYTE2];
if((StatusReg & XISF_SR_ERASE_FAIL_MASK) != 0) {
return XST_FAILURE;
}
/*
* Read the sector protection register.
*/
TransferInProgress = TRUE;
Status = XIsf_SectorProtect(&Isf, XISF_SPR_READ, ReadBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Clear all the block protection bits in the sector protection register
* value read above and write it back to the sector protection register
* to disable sector protection for all sectors.
*/
WriteBuffer[BYTE1] = ReadBuffer[BYTE2] &
~(XISF_SR_BLOCK_PROTECT_MASK);
/*
* Disable the sector protection.
*/
TransferInProgress = TRUE;
Status = XIsf_SectorProtect(&Isf, XISF_SPR_WRITE, WriteBuffer);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Wait till the Flash is not Busy.
*/
Status = IsfWaitForFlashNotBusy();
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* The following code Reads data from a Page in the Intel Serial Flash.
*/
/*
* Set the
* - Address in the Serial Flash where the data is to be read from.
* - Number of bytes to be read from the Serial Flash.
* - Read Buffer to which the data is to be read.
*/
ReadParam.Address = Address;
ReadParam.NumBytes = ISF_PAGE_SIZE;
ReadParam.ReadPtr = ReadBuffer;
/*
* Perform the read operation.
*/
TransferInProgress = TRUE;
Status = XIsf_Read(&Isf, XISF_READ, (void*) &ReadParam);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait till the Transfer is complete and check if there are any errors
* in the transaction.
*/
while(TransferInProgress);
if(ErrorCount != 0) {
return XST_FAILURE;
}
/*
* Compare the data read against the data Written.
*/
for(Index = 0; Index < ISF_PAGE_SIZE; Index++) {
if(ReadBuffer[Index + XISF_CMD_SEND_EXTRA_BYTES] !=
(u8)(Index + ISF_TEST_BYTE)) {
return XST_FAILURE;
}
}
return XST_SUCCESS;
}