--- /dev/null
+/*\r
+ LUFA Library\r
+ Copyright (C) Dean Camera, 2011.\r
+\r
+ dean [at] fourwalledcubicle [dot] com\r
+ www.lufa-lib.org\r
+*/\r
+\r
+/*\r
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+\r
+ Permission to use, copy, modify, distribute, and sell this\r
+ software and its documentation for any purpose is hereby granted\r
+ without fee, provided that the above copyright notice appear in\r
+ all copies and that both that the copyright notice and this\r
+ permission notice and warranty disclaimer appear in supporting\r
+ documentation, and that the name of the author not be used in\r
+ advertising or publicity pertaining to distribution of the\r
+ software without specific, written prior permission.\r
+\r
+ The author disclaim all warranties with regard to this\r
+ software, including all implied warranties of merchantability\r
+ and fitness. In no event shall the author be liable for any\r
+ special, indirect or consequential damages or any damages\r
+ whatsoever resulting from loss of use, data or profits, whether\r
+ in an action of contract, negligence or other tortious action,\r
+ arising out of or in connection with the use or performance of\r
+ this software.\r
+*/\r
+\r
+/** \file\r
+ *\r
+ * Functions to manage the physical Dataflash media, including reading and writing of\r
+ * blocks of data. These functions are called by the SCSI layer when data must be stored\r
+ * or retrieved to/from the physical storage media. If a different media is used (such\r
+ * as a SD card or EEPROM), functions similar to these will need to be generated.\r
+ */\r
+\r
+#define INCLUDE_FROM_DATAFLASHMANAGER_C\r
+#include "DataflashManager.h"\r
+\r
+/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from\r
+ * the pre-selected data OUT endpoint. This routine reads in OS sized blocks from the endpoint and writes\r
+ * them to the Dataflash in Dataflash page sized blocks.\r
+ *\r
+ * \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state\r
+ * \param[in] BlockAddress Data block starting address for the write sequence\r
+ * \param[in] TotalBlocks Number of blocks of data to write\r
+ */\r
+void DataflashManager_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,\r
+ const uint32_t BlockAddress,\r
+ uint16_t TotalBlocks)\r
+{\r
+ uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);\r
+ uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);\r
+ uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);\r
+ bool UsingSecondBuffer = false;\r
+\r
+ /* Select the correct starting Dataflash IC for the block requested */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)\r
+ /* Copy selected dataflash's current page contents to the Dataflash buffer */\r
+ Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+ Dataflash_WaitWhileBusy();\r
+#endif\r
+\r
+ /* Send the Dataflash buffer write command */\r
+ Dataflash_SendByte(DF_CMD_BUFF1WRITE);\r
+ Dataflash_SendAddressBytes(0, CurrDFPageByte);\r
+\r
+ /* Wait until endpoint is ready before continuing */\r
+ if (Endpoint_WaitUntilReady())\r
+ return;\r
+\r
+ while (TotalBlocks)\r
+ {\r
+ uint8_t BytesInBlockDiv16 = 0;\r
+\r
+ /* Write an endpoint packet sized data block to the Dataflash */\r
+ while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))\r
+ {\r
+ /* Check if the endpoint is currently empty */\r
+ if (!(Endpoint_IsReadWriteAllowed()))\r
+ {\r
+ /* Clear the current endpoint bank */\r
+ Endpoint_ClearOUT();\r
+\r
+ /* Wait until the host has sent another packet */\r
+ if (Endpoint_WaitUntilReady())\r
+ return;\r
+ }\r
+\r
+ /* Check if end of Dataflash page reached */\r
+ if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))\r
+ {\r
+ /* Write the Dataflash buffer contents back to the Dataflash page */\r
+ Dataflash_WaitWhileBusy();\r
+ Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+\r
+ /* Reset the Dataflash buffer counter, increment the page counter */\r
+ CurrDFPageByteDiv16 = 0;\r
+ CurrDFPage++;\r
+\r
+ /* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */\r
+ if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))\r
+ UsingSecondBuffer = !(UsingSecondBuffer);\r
+\r
+ /* Select the next Dataflash chip based on the new Dataflash page index */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)\r
+ /* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */\r
+ if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))\r
+ {\r
+ /* Copy selected dataflash's current page contents to the Dataflash buffer */\r
+ Dataflash_WaitWhileBusy();\r
+ Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+ Dataflash_WaitWhileBusy();\r
+ }\r
+#endif\r
+\r
+ /* Send the Dataflash buffer write command */\r
+ Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE);\r
+ Dataflash_SendAddressBytes(0, 0);\r
+ }\r
+\r
+ /* Write one 16-byte chunk of data to the Dataflash */\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+ Dataflash_SendByte(Endpoint_Read_Byte());\r
+\r
+ /* Increment the Dataflash page 16 byte block counter */\r
+ CurrDFPageByteDiv16++;\r
+\r
+ /* Increment the block 16 byte block counter */\r
+ BytesInBlockDiv16++;\r
+\r
+ /* Check if the current command is being aborted by the host */\r
+ if (MSInterfaceInfo->State.IsMassStoreReset)\r
+ return;\r
+ }\r
+\r
+ /* Decrement the blocks remaining counter and reset the sub block counter */\r
+ TotalBlocks--;\r
+ }\r
+\r
+ /* Write the Dataflash buffer contents back to the Dataflash page */\r
+ Dataflash_WaitWhileBusy();\r
+ Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0x00);\r
+ Dataflash_WaitWhileBusy();\r
+\r
+ /* If the endpoint is empty, clear it ready for the next packet from the host */\r
+ if (!(Endpoint_IsReadWriteAllowed()))\r
+ Endpoint_ClearOUT();\r
+\r
+ /* Deselect all Dataflash chips */\r
+ Dataflash_DeselectChip();\r
+}\r
+\r
+/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into\r
+ * the pre-selected data IN endpoint. This routine reads in Dataflash page sized blocks from the Dataflash\r
+ * and writes them in OS sized blocks to the endpoint.\r
+ *\r
+ * \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state\r
+ * \param[in] BlockAddress Data block starting address for the read sequence\r
+ * \param[in] TotalBlocks Number of blocks of data to read\r
+ */\r
+void DataflashManager_ReadBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,\r
+ const uint32_t BlockAddress,\r
+ uint16_t TotalBlocks)\r
+{\r
+ uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);\r
+ uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);\r
+ uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);\r
+\r
+ /* Select the correct starting Dataflash IC for the block requested */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+ /* Send the Dataflash main memory page read command */\r
+ Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);\r
+ Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+\r
+ /* Wait until endpoint is ready before continuing */\r
+ if (Endpoint_WaitUntilReady())\r
+ return;\r
+\r
+ while (TotalBlocks)\r
+ {\r
+ uint8_t BytesInBlockDiv16 = 0;\r
+\r
+ /* Write an endpoint packet sized data block to the Dataflash */\r
+ while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))\r
+ {\r
+ /* Check if the endpoint is currently full */\r
+ if (!(Endpoint_IsReadWriteAllowed()))\r
+ {\r
+ /* Clear the endpoint bank to send its contents to the host */\r
+ Endpoint_ClearIN();\r
+\r
+ /* Wait until the endpoint is ready for more data */\r
+ if (Endpoint_WaitUntilReady())\r
+ return;\r
+ }\r
+\r
+ /* Check if end of Dataflash page reached */\r
+ if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))\r
+ {\r
+ /* Reset the Dataflash buffer counter, increment the page counter */\r
+ CurrDFPageByteDiv16 = 0;\r
+ CurrDFPage++;\r
+\r
+ /* Select the next Dataflash chip based on the new Dataflash page index */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+ /* Send the Dataflash main memory page read command */\r
+ Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ }\r
+\r
+ /* Read one 16-byte chunk of data from the Dataflash */\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+ Endpoint_Write_Byte(Dataflash_ReceiveByte());\r
+\r
+ /* Increment the Dataflash page 16 byte block counter */\r
+ CurrDFPageByteDiv16++;\r
+\r
+ /* Increment the block 16 byte block counter */\r
+ BytesInBlockDiv16++;\r
+\r
+ /* Check if the current command is being aborted by the host */\r
+ if (MSInterfaceInfo->State.IsMassStoreReset)\r
+ return;\r
+ }\r
+\r
+ /* Decrement the blocks remaining counter */\r
+ TotalBlocks--;\r
+ }\r
+\r
+ /* If the endpoint is full, send its contents to the host */\r
+ if (!(Endpoint_IsReadWriteAllowed()))\r
+ Endpoint_ClearIN();\r
+\r
+ /* Deselect all Dataflash chips */\r
+ Dataflash_DeselectChip();\r
+}\r
+\r
+/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from\r
+ * the given RAM buffer. This routine reads in OS sized blocks from the buffer and writes them to the\r
+ * Dataflash in Dataflash page sized blocks. This can be linked to FAT libraries to write files to the\r
+ * Dataflash.\r
+ *\r
+ * \param[in] BlockAddress Data block starting address for the write sequence\r
+ * \param[in] TotalBlocks Number of blocks of data to write\r
+ * \param[in] BufferPtr Pointer to the data source RAM buffer\r
+ */\r
+void DataflashManager_WriteBlocks_RAM(const uint32_t BlockAddress,\r
+ uint16_t TotalBlocks,\r
+ uint8_t* BufferPtr)\r
+{\r
+ uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);\r
+ uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);\r
+ uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);\r
+ bool UsingSecondBuffer = false;\r
+\r
+ /* Select the correct starting Dataflash IC for the block requested */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)\r
+ /* Copy selected dataflash's current page contents to the Dataflash buffer */\r
+ Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+ Dataflash_WaitWhileBusy();\r
+#endif\r
+\r
+ /* Send the Dataflash buffer write command */\r
+ Dataflash_SendByte(DF_CMD_BUFF1WRITE);\r
+ Dataflash_SendAddressBytes(0, CurrDFPageByte);\r
+\r
+ while (TotalBlocks)\r
+ {\r
+ uint8_t BytesInBlockDiv16 = 0;\r
+\r
+ /* Write an endpoint packet sized data block to the Dataflash */\r
+ while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))\r
+ {\r
+ /* Check if end of Dataflash page reached */\r
+ if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))\r
+ {\r
+ /* Write the Dataflash buffer contents back to the Dataflash page */\r
+ Dataflash_WaitWhileBusy();\r
+ Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+\r
+ /* Reset the Dataflash buffer counter, increment the page counter */\r
+ CurrDFPageByteDiv16 = 0;\r
+ CurrDFPage++;\r
+\r
+ /* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */\r
+ if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))\r
+ UsingSecondBuffer = !(UsingSecondBuffer);\r
+\r
+ /* Select the next Dataflash chip based on the new Dataflash page index */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)\r
+ /* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */\r
+ if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))\r
+ {\r
+ /* Copy selected dataflash's current page contents to the Dataflash buffer */\r
+ Dataflash_WaitWhileBusy();\r
+ Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+ Dataflash_WaitWhileBusy();\r
+ }\r
+#endif\r
+\r
+ /* Send the Dataflash buffer write command */\r
+ Dataflash_ToggleSelectedChipCS();\r
+ Dataflash_SendByte(DF_CMD_BUFF1WRITE);\r
+ Dataflash_SendAddressBytes(0, 0);\r
+ }\r
+\r
+ /* Write one 16-byte chunk of data to the Dataflash */\r
+ for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)\r
+ Dataflash_SendByte(*(BufferPtr++));\r
+\r
+ /* Increment the Dataflash page 16 byte block counter */\r
+ CurrDFPageByteDiv16++;\r
+\r
+ /* Increment the block 16 byte block counter */\r
+ BytesInBlockDiv16++;\r
+ }\r
+\r
+ /* Decrement the blocks remaining counter and reset the sub block counter */\r
+ TotalBlocks--;\r
+ }\r
+\r
+ /* Write the Dataflash buffer contents back to the Dataflash page */\r
+ Dataflash_WaitWhileBusy();\r
+ Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0x00);\r
+ Dataflash_WaitWhileBusy();\r
+\r
+ /* Deselect all Dataflash chips */\r
+ Dataflash_DeselectChip();\r
+}\r
+\r
+/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into\r
+ * the preallocated RAM buffer. This routine reads in Dataflash page sized blocks from the Dataflash\r
+ * and writes them in OS sized blocks to the given buffer. This can be linked to FAT libraries to read\r
+ * the files stored on the Dataflash.\r
+ *\r
+ * \param[in] BlockAddress Data block starting address for the read sequence\r
+ * \param[in] TotalBlocks Number of blocks of data to read\r
+ * \param[out] BufferPtr Pointer to the data destination RAM buffer\r
+ */\r
+void DataflashManager_ReadBlocks_RAM(const uint32_t BlockAddress,\r
+ uint16_t TotalBlocks,\r
+ uint8_t* BufferPtr)\r
+{\r
+ uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);\r
+ uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);\r
+ uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);\r
+\r
+ /* Select the correct starting Dataflash IC for the block requested */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+ /* Send the Dataflash main memory page read command */\r
+ Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);\r
+ Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+\r
+ while (TotalBlocks)\r
+ {\r
+ uint8_t BytesInBlockDiv16 = 0;\r
+\r
+ /* Write an endpoint packet sized data block to the Dataflash */\r
+ while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))\r
+ {\r
+ /* Check if end of Dataflash page reached */\r
+ if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))\r
+ {\r
+ /* Reset the Dataflash buffer counter, increment the page counter */\r
+ CurrDFPageByteDiv16 = 0;\r
+ CurrDFPage++;\r
+\r
+ /* Select the next Dataflash chip based on the new Dataflash page index */\r
+ Dataflash_SelectChipFromPage(CurrDFPage);\r
+\r
+ /* Send the Dataflash main memory page read command */\r
+ Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);\r
+ Dataflash_SendAddressBytes(CurrDFPage, 0);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ Dataflash_SendByte(0x00);\r
+ }\r
+\r
+ /* Read one 16-byte chunk of data from the Dataflash */\r
+ for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)\r
+ *(BufferPtr++) = Dataflash_ReceiveByte();\r
+\r
+ /* Increment the Dataflash page 16 byte block counter */\r
+ CurrDFPageByteDiv16++;\r
+\r
+ /* Increment the block 16 byte block counter */\r
+ BytesInBlockDiv16++;\r
+ }\r
+\r
+ /* Decrement the blocks remaining counter */\r
+ TotalBlocks--;\r
+ }\r
+\r
+ /* Deselect all Dataflash chips */\r
+ Dataflash_DeselectChip();\r
+}\r
+\r
+/** Disables the Dataflash memory write protection bits on the board Dataflash ICs, if enabled. */\r
+void DataflashManager_ResetDataflashProtections(void)\r
+{\r
+ /* Select first Dataflash chip, send the read status register command */\r
+ Dataflash_SelectChip(DATAFLASH_CHIP1);\r
+ Dataflash_SendByte(DF_CMD_GETSTATUS);\r
+\r
+ /* Check if sector protection is enabled */\r
+ if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON)\r
+ {\r
+ Dataflash_ToggleSelectedChipCS();\r
+\r
+ /* Send the commands to disable sector protection */\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]);\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]);\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]);\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]);\r
+ }\r
+\r
+ /* Select second Dataflash chip (if present on selected board), send read status register command */\r
+ #if (DATAFLASH_TOTALCHIPS == 2)\r
+ Dataflash_SelectChip(DATAFLASH_CHIP2);\r
+ Dataflash_SendByte(DF_CMD_GETSTATUS);\r
+\r
+ /* Check if sector protection is enabled */\r
+ if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON)\r
+ {\r
+ Dataflash_ToggleSelectedChipCS();\r
+\r
+ /* Send the commands to disable sector protection */\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]);\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]);\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]);\r
+ Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]);\r
+ }\r
+ #endif\r
+\r
+ /* Deselect current Dataflash chip */\r
+ Dataflash_DeselectChip();\r
+}\r
+\r
+/** Performs a simple test on the attached Dataflash IC(s) to ensure that they are working.\r
+ *\r
+ * \return Boolean true if all media chips are working, false otherwise\r
+ */\r
+bool DataflashManager_CheckDataflashOperation(void)\r
+{\r
+ uint8_t ReturnByte;\r
+\r
+ /* Test first Dataflash IC is present and responding to commands */\r
+ Dataflash_SelectChip(DATAFLASH_CHIP1);\r
+ Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);\r
+ ReturnByte = Dataflash_ReceiveByte();\r
+ Dataflash_DeselectChip();\r
+\r
+ /* If returned data is invalid, fail the command */\r
+ if (ReturnByte != DF_MANUFACTURER_ATMEL)\r
+ return false;\r
+\r
+ #if (DATAFLASH_TOTALCHIPS == 2)\r
+ /* Test second Dataflash IC is present and responding to commands */\r
+ Dataflash_SelectChip(DATAFLASH_CHIP2);\r
+ Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);\r
+ ReturnByte = Dataflash_ReceiveByte();\r
+ Dataflash_DeselectChip();\r
+\r
+ /* If returned data is invalid, fail the command */\r
+ if (ReturnByte != DF_MANUFACTURER_ATMEL)\r
+ return false;\r
+ #endif\r
+\r
+ return true;\r
+}\r
+\r
projects / pub / lufa.git / blobdiff