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526 lines
20 KiB
526 lines
20 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Functions to manage the physical dataflash media, including reading and writing of
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* blocks of data. These functions are called by the SCSI layer when data must be stored
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* or retrieved to/from the physical storage media. If a different media is used (such
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* as a SD card or EEPROM), functions similar to these will need to be generated.
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*/
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#define INCLUDE_FROM_DATAFLASHMANAGER_C
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#include "DataflashManager.h"
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/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board dataflash IC(s), from
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* the pre-selected data OUT endpoint. This routine reads in OS sized blocks from the endpoint and writes
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* them to the dataflash in Dataflash page sized blocks.
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*
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* \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state
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* \param[in] BlockAddress Data block starting address for the write sequence
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* \param[in] TotalBlocks Number of blocks of data to write
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*/
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void DataflashManager_WriteBlocks(USB_ClassInfo_MS_Device_t* MSInterfaceInfo, const uint32_t BlockAddress, uint16_t TotalBlocks)
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{
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uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
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uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
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uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
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bool UsingSecondBuffer = false;
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/* Select the correct starting Dataflash IC for the block requested */
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Dataflash_SelectChipFromPage(CurrDFPage);
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#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
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/* Copy selected dataflash's current page contents to the dataflash buffer */
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Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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Dataflash_WaitWhileBusy();
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#endif
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/* Send the dataflash buffer write command */
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Dataflash_SendByte(DF_CMD_BUFF1WRITE);
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Dataflash_SendAddressBytes(0, CurrDFPageByte);
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/* Wait until endpoint is ready before continuing */
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if (Endpoint_WaitUntilReady())
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return;
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while (TotalBlocks)
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{
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uint8_t BytesInBlockDiv16 = 0;
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/* Write an endpoint packet sized data block to the dataflash */
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while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
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{
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/* Check if the endpoint is currently empty */
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if (!(Endpoint_IsReadWriteAllowed()))
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{
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/* Clear the current endpoint bank */
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Endpoint_ClearOUT();
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/* Wait until the host has sent another packet */
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if (Endpoint_WaitUntilReady())
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return;
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}
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/* Check if end of dataflash page reached */
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if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
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{
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/* Write the dataflash buffer contents back to the dataflash page */
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Dataflash_WaitWhileBusy();
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Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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/* Reset the dataflash buffer counter, increment the page counter */
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CurrDFPageByteDiv16 = 0;
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CurrDFPage++;
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/* Once all the dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */
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if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))
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UsingSecondBuffer = !(UsingSecondBuffer);
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/* Select the next dataflash chip based on the new dataflash page index */
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Dataflash_SelectChipFromPage(CurrDFPage);
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#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
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/* If less than one dataflash page remaining, copy over the existing page to preserve trailing data */
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if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))
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{
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/* Copy selected dataflash's current page contents to the dataflash buffer */
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Dataflash_WaitWhileBusy();
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Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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Dataflash_WaitWhileBusy();
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}
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#endif
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/* Send the dataflash buffer write command */
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Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE);
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Dataflash_SendAddressBytes(0, 0);
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}
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/* Write one 16-byte chunk of data to the dataflash */
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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Dataflash_SendByte(Endpoint_Read_Byte());
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/* Increment the dataflash page 16 byte block counter */
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CurrDFPageByteDiv16++;
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/* Increment the block 16 byte block counter */
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BytesInBlockDiv16++;
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/* Check if the current command is being aborted by the host */
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if (MSInterfaceInfo->State.IsMassStoreReset)
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return;
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}
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/* Decrement the blocks remaining counter and reset the sub block counter */
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TotalBlocks--;
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}
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/* Write the dataflash buffer contents back to the dataflash page */
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Dataflash_WaitWhileBusy();
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Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
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Dataflash_SendAddressBytes(CurrDFPage, 0x00);
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Dataflash_WaitWhileBusy();
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/* If the endpoint is empty, clear it ready for the next packet from the host */
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if (!(Endpoint_IsReadWriteAllowed()))
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Endpoint_ClearOUT();
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/* Deselect all dataflash chips */
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Dataflash_DeselectChip();
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}
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/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board dataflash IC(s), into
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* the pre-selected data IN endpoint. This routine reads in Dataflash page sized blocks from the Dataflash
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* and writes them in OS sized blocks to the endpoint.
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*
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* \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state
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* \param[in] BlockAddress Data block starting address for the read sequence
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* \param[in] TotalBlocks Number of blocks of data to read
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*/
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void DataflashManager_ReadBlocks(USB_ClassInfo_MS_Device_t* MSInterfaceInfo, const uint32_t BlockAddress, uint16_t TotalBlocks)
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{
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uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
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uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
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uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
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/* Select the correct starting Dataflash IC for the block requested */
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Dataflash_SelectChipFromPage(CurrDFPage);
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/* Send the dataflash main memory page read command */
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Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
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Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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/* Wait until endpoint is ready before continuing */
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if (Endpoint_WaitUntilReady())
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return;
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while (TotalBlocks)
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{
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uint8_t BytesInBlockDiv16 = 0;
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/* Write an endpoint packet sized data block to the dataflash */
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while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
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{
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/* Check if the endpoint is currently full */
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if (!(Endpoint_IsReadWriteAllowed()))
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{
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/* Clear the endpoint bank to send its contents to the host */
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Endpoint_ClearIN();
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/* Wait until the endpoint is ready for more data */
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if (Endpoint_WaitUntilReady())
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return;
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}
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/* Check if end of dataflash page reached */
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if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
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{
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/* Reset the dataflash buffer counter, increment the page counter */
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CurrDFPageByteDiv16 = 0;
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CurrDFPage++;
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/* Select the next dataflash chip based on the new dataflash page index */
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Dataflash_SelectChipFromPage(CurrDFPage);
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/* Send the dataflash main memory page read command */
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Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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}
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/* Read one 16-byte chunk of data from the dataflash */
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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Endpoint_Write_Byte(Dataflash_ReceiveByte());
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/* Increment the dataflash page 16 byte block counter */
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CurrDFPageByteDiv16++;
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/* Increment the block 16 byte block counter */
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BytesInBlockDiv16++;
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/* Check if the current command is being aborted by the host */
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if (MSInterfaceInfo->State.IsMassStoreReset)
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return;
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}
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/* Decrement the blocks remaining counter */
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TotalBlocks--;
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}
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/* If the endpoint is full, send its contents to the host */
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if (!(Endpoint_IsReadWriteAllowed()))
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Endpoint_ClearIN();
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/* Deselect all dataflash chips */
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Dataflash_DeselectChip();
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}
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/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board dataflash IC(s), from
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* the a given RAM buffer. This routine reads in OS sized blocks from the buffer and writes them to the
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* dataflash in Dataflash page sized blocks. This can be linked to FAT libraries to write files to the
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* dataflash.
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*
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* \param[in] BlockAddress Data block starting address for the write sequence
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* \param[in] TotalBlocks Number of blocks of data to write
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* \param[in] BufferPtr Pointer to the data source RAM buffer
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*/
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void DataflashManager_WriteBlocks_RAM(const uint32_t BlockAddress, uint16_t TotalBlocks, uint8_t* BufferPtr)
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{
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uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
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uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
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uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
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bool UsingSecondBuffer = false;
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/* Select the correct starting Dataflash IC for the block requested */
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Dataflash_SelectChipFromPage(CurrDFPage);
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#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
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/* Copy selected dataflash's current page contents to the dataflash buffer */
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Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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Dataflash_WaitWhileBusy();
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#endif
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/* Send the dataflash buffer write command */
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Dataflash_SendByte(DF_CMD_BUFF1WRITE);
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Dataflash_SendAddressBytes(0, CurrDFPageByte);
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while (TotalBlocks)
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{
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uint8_t BytesInBlockDiv16 = 0;
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/* Write an endpoint packet sized data block to the dataflash */
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while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
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{
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/* Check if end of dataflash page reached */
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if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
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{
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/* Write the dataflash buffer contents back to the dataflash page */
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Dataflash_WaitWhileBusy();
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Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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/* Reset the dataflash buffer counter, increment the page counter */
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CurrDFPageByteDiv16 = 0;
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CurrDFPage++;
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/* Once all the dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */
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if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))
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UsingSecondBuffer = !(UsingSecondBuffer);
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/* Select the next dataflash chip based on the new dataflash page index */
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Dataflash_SelectChipFromPage(CurrDFPage);
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#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
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/* If less than one dataflash page remaining, copy over the existing page to preserve trailing data */
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if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))
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{
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/* Copy selected dataflash's current page contents to the dataflash buffer */
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Dataflash_WaitWhileBusy();
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Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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Dataflash_WaitWhileBusy();
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}
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#endif
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/* Send the dataflash buffer write command */
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Dataflash_ToggleSelectedChipCS();
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Dataflash_SendByte(DF_CMD_BUFF1WRITE);
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Dataflash_SendAddressBytes(0, 0);
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}
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/* Write one 16-byte chunk of data to the dataflash */
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for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)
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Dataflash_SendByte(*(BufferPtr++));
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/* Increment the dataflash page 16 byte block counter */
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CurrDFPageByteDiv16++;
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/* Increment the block 16 byte block counter */
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BytesInBlockDiv16++;
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}
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/* Decrement the blocks remaining counter and reset the sub block counter */
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TotalBlocks--;
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}
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/* Write the dataflash buffer contents back to the dataflash page */
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Dataflash_WaitWhileBusy();
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Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
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Dataflash_SendAddressBytes(CurrDFPage, 0x00);
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Dataflash_WaitWhileBusy();
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/* Deselect all dataflash chips */
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Dataflash_DeselectChip();
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}
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/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board dataflash IC(s), into
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* the a preallocated RAM buffer. This routine reads in Dataflash page sized blocks from the Dataflash
|
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* and writes them in OS sized blocks to the given buffer. This can be linked to FAT libraries to read
|
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* the files stored on the dataflash.
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*
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* \param[in] BlockAddress Data block starting address for the read sequence
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* \param[in] TotalBlocks Number of blocks of data to read
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* \param[out] BufferPtr Pointer to the data destination RAM buffer
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*/
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void DataflashManager_ReadBlocks_RAM(const uint32_t BlockAddress, uint16_t TotalBlocks, uint8_t* BufferPtr)
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{
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uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
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uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
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uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
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/* Select the correct starting Dataflash IC for the block requested */
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Dataflash_SelectChipFromPage(CurrDFPage);
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/* Send the dataflash main memory page read command */
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Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
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Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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while (TotalBlocks)
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{
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uint8_t BytesInBlockDiv16 = 0;
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/* Write an endpoint packet sized data block to the dataflash */
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while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
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{
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/* Check if end of dataflash page reached */
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if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
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{
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/* Reset the dataflash buffer counter, increment the page counter */
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CurrDFPageByteDiv16 = 0;
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CurrDFPage++;
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/* Select the next dataflash chip based on the new dataflash page index */
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Dataflash_SelectChipFromPage(CurrDFPage);
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/* Send the dataflash main memory page read command */
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Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
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Dataflash_SendAddressBytes(CurrDFPage, 0);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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Dataflash_SendByte(0x00);
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}
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/* Read one 16-byte chunk of data from the dataflash */
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for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)
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*(BufferPtr++) = Dataflash_ReceiveByte();
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/* Increment the dataflash page 16 byte block counter */
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CurrDFPageByteDiv16++;
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/* Increment the block 16 byte block counter */
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BytesInBlockDiv16++;
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}
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/* Decrement the blocks remaining counter */
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TotalBlocks--;
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}
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/* Deselect all dataflash chips */
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Dataflash_DeselectChip();
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}
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/** Disables the dataflash memory write protection bits on the board Dataflash ICs, if enabled. */
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void DataflashManager_ResetDataflashProtections(void)
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{
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/* Select first dataflash chip, send the read status register command */
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Dataflash_SelectChip(DATAFLASH_CHIP1);
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Dataflash_SendByte(DF_CMD_GETSTATUS);
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/* 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 true if all media chips are working, 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;
|
|
}
|