535 lines
20 KiB
C
535 lines
20 KiB
C
|
/*
|
||
|
|
LUFA Library
|
||
|
|
Copyright (C) Dean Camera, 2019.
|
||
|
|
|
||
|
|
dean [at] fourwalledcubicle [dot] com
|
||
|
|
www.lufa-lib.org
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright 2019 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
||
|
|
|
||
|
|
Permission to use, copy, modify, distribute, and sell this
|
||
|
|
software and its documentation for any purpose is hereby granted
|
||
|
|
without fee, provided that the above copyright notice appear in
|
||
|
|
all copies and that both that the copyright notice and this
|
||
|
|
permission notice and warranty disclaimer appear in supporting
|
||
|
|
documentation, and that the name of the author not be used in
|
||
|
|
advertising or publicity pertaining to distribution of the
|
||
|
|
software without specific, written prior permission.
|
||
|
|
|
||
|
|
The author disclaims all warranties with regard to this
|
||
|
|
software, including all implied warranties of merchantability
|
||
|
|
and fitness. In no event shall the author be liable for any
|
||
|
|
special, indirect or consequential damages or any damages
|
||
|
|
whatsoever resulting from loss of use, data or profits, whether
|
||
|
|
in an action of contract, negligence or other tortious action,
|
||
|
|
arising out of or in connection with the use or performance of
|
||
|
|
this software.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** \file
|
||
|
|
*
|
||
|
|
* Functions to manage the physical Dataflash media, including reading and writing of
|
||
|
|
* blocks of data. These functions are called by the SCSI layer when data must be stored
|
||
|
|
* or retrieved to/from the physical storage media. If a different media is used (such
|
||
|
|
* as a SD card or EEPROM), functions similar to these will need to be generated.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define INCLUDE_FROM_DATAFLASHMANAGER_C
|
||
|
|
#include "DataflashManager.h"
|
||
|
|
|
||
|
|
/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from
|
||
|
|
* the pre-selected data OUT endpoint. This routine reads in OS sized blocks from the endpoint and writes
|
||
|
|
* them to the Dataflash in Dataflash page sized blocks.
|
||
|
|
*
|
||
|
|
* \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state
|
||
|
|
* \param[in] BlockAddress Data block starting address for the write sequence
|
||
|
|
* \param[in] TotalBlocks Number of blocks of data to write
|
||
|
|
*/
|
||
|
|
void DataflashManager_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
|
||
|
|
const uint32_t BlockAddress,
|
||
|
|
uint16_t TotalBlocks)
|
||
|
|
{
|
||
|
|
uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
|
||
|
|
uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
|
||
|
|
uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
|
||
|
|
bool UsingSecondBuffer = false;
|
||
|
|
|
||
|
|
/* Select the correct starting Dataflash IC for the block requested */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
|
||
|
|
/* Copy selected dataflash's current page contents to the Dataflash buffer */
|
||
|
|
Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Send the Dataflash buffer write command */
|
||
|
|
Dataflash_SendByte(DF_CMD_BUFF1WRITE);
|
||
|
|
Dataflash_SendAddressBytes(0, CurrDFPageByte);
|
||
|
|
|
||
|
|
/* Wait until endpoint is ready before continuing */
|
||
|
|
if (Endpoint_WaitUntilReady())
|
||
|
|
return;
|
||
|
|
|
||
|
|
while (TotalBlocks)
|
||
|
|
{
|
||
|
|
uint8_t BytesInBlockDiv16 = 0;
|
||
|
|
|
||
|
|
/* Write an endpoint packet sized data block to the Dataflash */
|
||
|
|
while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Check if the endpoint is currently empty */
|
||
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
||
|
|
{
|
||
|
|
/* Clear the current endpoint bank */
|
||
|
|
Endpoint_ClearOUT();
|
||
|
|
|
||
|
|
/* Wait until the host has sent another packet */
|
||
|
|
if (Endpoint_WaitUntilReady())
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check if end of Dataflash page reached */
|
||
|
|
if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Write the Dataflash buffer contents back to the Dataflash page */
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
|
||
|
|
/* Reset the Dataflash buffer counter, increment the page counter */
|
||
|
|
CurrDFPageByteDiv16 = 0;
|
||
|
|
CurrDFPage++;
|
||
|
|
|
||
|
|
/* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */
|
||
|
|
if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))
|
||
|
|
UsingSecondBuffer = !(UsingSecondBuffer);
|
||
|
|
|
||
|
|
/* Select the next Dataflash chip based on the new Dataflash page index */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
|
||
|
|
/* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */
|
||
|
|
if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Copy selected dataflash's current page contents to the Dataflash buffer */
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Send the Dataflash buffer write command */
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE);
|
||
|
|
Dataflash_SendAddressBytes(0, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Write one 16-byte chunk of data to the Dataflash */
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
Dataflash_SendByte(Endpoint_Read_8());
|
||
|
|
|
||
|
|
/* Increment the Dataflash page 16 byte block counter */
|
||
|
|
CurrDFPageByteDiv16++;
|
||
|
|
|
||
|
|
/* Increment the block 16 byte block counter */
|
||
|
|
BytesInBlockDiv16++;
|
||
|
|
|
||
|
|
/* Check if the current command is being aborted by the host */
|
||
|
|
if (MSInterfaceInfo->State.IsMassStoreReset)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Decrement the blocks remaining counter */
|
||
|
|
TotalBlocks--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Write the Dataflash buffer contents back to the Dataflash page */
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0x00);
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
|
||
|
|
/* If the endpoint is empty, clear it ready for the next packet from the host */
|
||
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
||
|
|
Endpoint_ClearOUT();
|
||
|
|
|
||
|
|
/* Deselect all Dataflash chips */
|
||
|
|
Dataflash_DeselectChip();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into
|
||
|
|
* the pre-selected data IN endpoint. This routine reads in Dataflash page sized blocks from the Dataflash
|
||
|
|
* and writes them in OS sized blocks to the endpoint.
|
||
|
|
*
|
||
|
|
* \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state
|
||
|
|
* \param[in] BlockAddress Data block starting address for the read sequence
|
||
|
|
* \param[in] TotalBlocks Number of blocks of data to read
|
||
|
|
*/
|
||
|
|
void DataflashManager_ReadBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
|
||
|
|
const uint32_t BlockAddress,
|
||
|
|
uint16_t TotalBlocks)
|
||
|
|
{
|
||
|
|
uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
|
||
|
|
uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
|
||
|
|
uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
|
||
|
|
|
||
|
|
/* Select the correct starting Dataflash IC for the block requested */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
/* Send the Dataflash main memory page read command */
|
||
|
|
Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
|
||
|
|
/* Wait until endpoint is ready before continuing */
|
||
|
|
if (Endpoint_WaitUntilReady())
|
||
|
|
return;
|
||
|
|
|
||
|
|
while (TotalBlocks)
|
||
|
|
{
|
||
|
|
uint8_t BytesInBlockDiv16 = 0;
|
||
|
|
|
||
|
|
/* Read an endpoint packet sized data block from the Dataflash */
|
||
|
|
while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Check if the endpoint is currently full */
|
||
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
||
|
|
{
|
||
|
|
/* Clear the endpoint bank to send its contents to the host */
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
|
||
|
|
/* Wait until the endpoint is ready for more data */
|
||
|
|
if (Endpoint_WaitUntilReady())
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check if end of Dataflash page reached */
|
||
|
|
if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Reset the Dataflash buffer counter, increment the page counter */
|
||
|
|
CurrDFPageByteDiv16 = 0;
|
||
|
|
CurrDFPage++;
|
||
|
|
|
||
|
|
/* Select the next Dataflash chip based on the new Dataflash page index */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
/* Send the Dataflash main memory page read command */
|
||
|
|
Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read one 16-byte chunk of data from the Dataflash */
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
Endpoint_Write_8(Dataflash_ReceiveByte());
|
||
|
|
|
||
|
|
/* Increment the Dataflash page 16 byte block counter */
|
||
|
|
CurrDFPageByteDiv16++;
|
||
|
|
|
||
|
|
/* Increment the block 16 byte block counter */
|
||
|
|
BytesInBlockDiv16++;
|
||
|
|
|
||
|
|
/* Check if the current command is being aborted by the host */
|
||
|
|
if (MSInterfaceInfo->State.IsMassStoreReset)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Decrement the blocks remaining counter */
|
||
|
|
TotalBlocks--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* If the endpoint is full, send its contents to the host */
|
||
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
|
||
|
|
/* Deselect all Dataflash chips */
|
||
|
|
Dataflash_DeselectChip();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from
|
||
|
|
* the given RAM buffer. This routine reads in OS sized blocks from the buffer and writes them to the
|
||
|
|
* Dataflash in Dataflash page sized blocks. This can be linked to FAT libraries to write files to the
|
||
|
|
* Dataflash.
|
||
|
|
*
|
||
|
|
* \param[in] BlockAddress Data block starting address for the write sequence
|
||
|
|
* \param[in] TotalBlocks Number of blocks of data to write
|
||
|
|
* \param[in] BufferPtr Pointer to the data source RAM buffer
|
||
|
|
*/
|
||
|
|
void DataflashManager_WriteBlocks_RAM(const uint32_t BlockAddress,
|
||
|
|
uint16_t TotalBlocks,
|
||
|
|
uint8_t* BufferPtr)
|
||
|
|
{
|
||
|
|
uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
|
||
|
|
uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
|
||
|
|
uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
|
||
|
|
bool UsingSecondBuffer = false;
|
||
|
|
|
||
|
|
/* Select the correct starting Dataflash IC for the block requested */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
|
||
|
|
/* Copy selected dataflash's current page contents to the Dataflash buffer */
|
||
|
|
Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Send the Dataflash buffer write command */
|
||
|
|
Dataflash_SendByte(DF_CMD_BUFF1WRITE);
|
||
|
|
Dataflash_SendAddressBytes(0, CurrDFPageByte);
|
||
|
|
|
||
|
|
while (TotalBlocks)
|
||
|
|
{
|
||
|
|
uint8_t BytesInBlockDiv16 = 0;
|
||
|
|
|
||
|
|
/* Write an endpoint packet sized data block to the Dataflash */
|
||
|
|
while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Check if end of Dataflash page reached */
|
||
|
|
if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Write the Dataflash buffer contents back to the Dataflash page */
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
|
||
|
|
/* Reset the Dataflash buffer counter, increment the page counter */
|
||
|
|
CurrDFPageByteDiv16 = 0;
|
||
|
|
CurrDFPage++;
|
||
|
|
|
||
|
|
/* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */
|
||
|
|
if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))
|
||
|
|
UsingSecondBuffer = !(UsingSecondBuffer);
|
||
|
|
|
||
|
|
/* Select the next Dataflash chip based on the new Dataflash page index */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
|
||
|
|
/* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */
|
||
|
|
if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Copy selected dataflash's current page contents to the Dataflash buffer */
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Send the Dataflash buffer write command */
|
||
|
|
Dataflash_ToggleSelectedChipCS();
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE);
|
||
|
|
Dataflash_SendAddressBytes(0, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Write one 16-byte chunk of data to the Dataflash */
|
||
|
|
for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)
|
||
|
|
Dataflash_SendByte(*(BufferPtr++));
|
||
|
|
|
||
|
|
/* Increment the Dataflash page 16 byte block counter */
|
||
|
|
CurrDFPageByteDiv16++;
|
||
|
|
|
||
|
|
/* Increment the block 16 byte block counter */
|
||
|
|
BytesInBlockDiv16++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Decrement the blocks remaining counter */
|
||
|
|
TotalBlocks--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Write the Dataflash buffer contents back to the Dataflash page */
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0x00);
|
||
|
|
Dataflash_WaitWhileBusy();
|
||
|
|
|
||
|
|
/* Deselect all Dataflash chips */
|
||
|
|
Dataflash_DeselectChip();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into
|
||
|
|
* the preallocated RAM buffer. This routine reads in Dataflash page sized blocks from the Dataflash
|
||
|
|
* and writes them in OS sized blocks to the given buffer. This can be linked to FAT libraries to read
|
||
|
|
* the files stored on the Dataflash.
|
||
|
|
*
|
||
|
|
* \param[in] BlockAddress Data block starting address for the read sequence
|
||
|
|
* \param[in] TotalBlocks Number of blocks of data to read
|
||
|
|
* \param[out] BufferPtr Pointer to the data destination RAM buffer
|
||
|
|
*/
|
||
|
|
void DataflashManager_ReadBlocks_RAM(const uint32_t BlockAddress,
|
||
|
|
uint16_t TotalBlocks,
|
||
|
|
uint8_t* BufferPtr)
|
||
|
|
{
|
||
|
|
uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
|
||
|
|
uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
|
||
|
|
uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
|
||
|
|
|
||
|
|
/* Select the correct starting Dataflash IC for the block requested */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
/* Send the Dataflash main memory page read command */
|
||
|
|
Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
|
||
|
|
while (TotalBlocks)
|
||
|
|
{
|
||
|
|
uint8_t BytesInBlockDiv16 = 0;
|
||
|
|
|
||
|
|
/* Read an endpoint packet sized data block from the Dataflash */
|
||
|
|
while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Check if end of Dataflash page reached */
|
||
|
|
if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
|
||
|
|
{
|
||
|
|
/* Reset the Dataflash buffer counter, increment the page counter */
|
||
|
|
CurrDFPageByteDiv16 = 0;
|
||
|
|
CurrDFPage++;
|
||
|
|
|
||
|
|
/* Select the next Dataflash chip based on the new Dataflash page index */
|
||
|
|
Dataflash_SelectChipFromPage(CurrDFPage);
|
||
|
|
|
||
|
|
/* Send the Dataflash main memory page read command */
|
||
|
|
Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
|
||
|
|
Dataflash_SendAddressBytes(CurrDFPage, 0);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
Dataflash_SendByte(0x00);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read one 16-byte chunk of data from the Dataflash */
|
||
|
|
for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)
|
||
|
|
*(BufferPtr++) = Dataflash_ReceiveByte();
|
||
|
|
|
||
|
|
/* Increment the Dataflash page 16 byte block counter */
|
||
|
|
CurrDFPageByteDiv16++;
|
||
|
|
|
||
|
|
/* Increment the block 16 byte block counter */
|
||
|
|
BytesInBlockDiv16++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Decrement the blocks remaining counter */
|
||
|
|
TotalBlocks--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Deselect all Dataflash chips */
|
||
|
|
Dataflash_DeselectChip();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Disables the Dataflash memory write protection bits on the board Dataflash ICs, if enabled. */
|
||
|
|
void DataflashManager_ResetDataflashProtections(void)
|
||
|
|
{
|
||
|
|
/* Select first Dataflash chip, send the read status register command */
|
||
|
|
Dataflash_SelectChip(DATAFLASH_CHIP1);
|
||
|
|
Dataflash_SendByte(DF_CMD_GETSTATUS);
|
||
|
|
|
||
|
|
/* Check if sector protection is enabled */
|
||
|
|
if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON)
|
||
|
|
{
|
||
|
|
Dataflash_ToggleSelectedChipCS();
|
||
|
|
|
||
|
|
/* Send the commands to disable sector protection */
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]);
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]);
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]);
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Select second Dataflash chip (if present on selected board), send read status register command */
|
||
|
|
#if (DATAFLASH_TOTALCHIPS == 2)
|
||
|
|
Dataflash_SelectChip(DATAFLASH_CHIP2);
|
||
|
|
Dataflash_SendByte(DF_CMD_GETSTATUS);
|
||
|
|
|
||
|
|
/* Check if sector protection is enabled */
|
||
|
|
if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON)
|
||
|
|
{
|
||
|
|
Dataflash_ToggleSelectedChipCS();
|
||
|
|
|
||
|
|
/* Send the commands to disable sector protection */
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]);
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]);
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]);
|
||
|
|
Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Deselect current Dataflash chip */
|
||
|
|
Dataflash_DeselectChip();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Performs a simple test on the attached Dataflash IC(s) to ensure that they are working.
|
||
|
|
*
|
||
|
|
* \return Boolean \c true if all media chips are working, \c false otherwise
|
||
|
|
*/
|
||
|
|
bool DataflashManager_CheckDataflashOperation(void)
|
||
|
|
{
|
||
|
|
uint8_t ReturnByte;
|
||
|
|
|
||
|
|
/* Test first Dataflash IC is present and responding to commands */
|
||
|
|
Dataflash_SelectChip(DATAFLASH_CHIP1);
|
||
|
|
Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);
|
||
|
|
ReturnByte = Dataflash_ReceiveByte();
|
||
|
|
Dataflash_DeselectChip();
|
||
|
|
|
||
|
|
/* If returned data is invalid, fail the command */
|
||
|
|
if (ReturnByte != DF_MANUFACTURER_ATMEL)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
#if (DATAFLASH_TOTALCHIPS == 2)
|
||
|
|
/* Test second Dataflash IC is present and responding to commands */
|
||
|
|
Dataflash_SelectChip(DATAFLASH_CHIP2);
|
||
|
|
Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);
|
||
|
|
ReturnByte = Dataflash_ReceiveByte();
|
||
|
|
Dataflash_DeselectChip();
|
||
|
|
|
||
|
|
/* If returned data is invalid, fail the command */
|
||
|
|
if (ReturnByte != DF_MANUFACTURER_ATMEL)
|
||
|
|
return false;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|