diff options
Diffstat (limited to 'MakefileBasedBuild/Atmel/sam3x/sam3x-ek/libraries/memories/spi-flash/at45.c')
| -rw-r--r-- | MakefileBasedBuild/Atmel/sam3x/sam3x-ek/libraries/memories/spi-flash/at45.c | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/MakefileBasedBuild/Atmel/sam3x/sam3x-ek/libraries/memories/spi-flash/at45.c b/MakefileBasedBuild/Atmel/sam3x/sam3x-ek/libraries/memories/spi-flash/at45.c deleted file mode 100644 index 22c3bba..0000000 --- a/MakefileBasedBuild/Atmel/sam3x/sam3x-ek/libraries/memories/spi-flash/at45.c +++ /dev/null @@ -1,257 +0,0 @@ -/* ----------------------------------------------------------------------------
- * ATMEL Microcontroller Software Support
- * ----------------------------------------------------------------------------
- * Copyright (c) 2008, Atmel Corporation
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the disclaimer below.
- *
- * Atmel's name may not be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
- * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ----------------------------------------------------------------------------
- */
-
-//------------------------------------------------------------------------------
-// Headers
-//------------------------------------------------------------------------------
-
-#include "at45.h"
-#include "board.h"
-#include <assert.h>
-
-#include <string.h>
-
-//------------------------------------------------------------------------------
-// Internal definitions
-//------------------------------------------------------------------------------
-
-/// Number of dataflash which can be recognized.
-#define NUMDATAFLASH (sizeof(at45Devices) / sizeof(At45Desc))
-
-//------------------------------------------------------------------------------
-// Local variables
-//------------------------------------------------------------------------------
-
-/// indicate if the device is configured as binary page or not.
-static unsigned char configuredBinaryPage;
-
-//------------------------------------------------------------------------------
-// Internal variables
-//------------------------------------------------------------------------------
-
-static const At45Desc at45Devices[] = {
- { 512, 1, 264, 9, 0x0C, "AT45DB011D"},
- { 1024, 1, 264, 9, 0x14, "AT45DB021D"},
- { 2048, 1, 264, 9, 0x1C, "AT45DB041D"},
- { 4096, 1, 264, 9, 0x24, "AT45DB081D"},
- { 4096, 1, 528, 10, 0x2C, "AT45DB161D"},
- { 8192, 1, 528, 10, 0x34, "AT45DB321D"},
- { 8192, 1, 1056, 11, 0x3C, "AT45DB642D"},
- {16384, 1, 1056, 11, 0x10, "AT45DB1282"},
- {16384, 1, 2112, 12, 0x18, "AT45DB2562"},
- {32768, 1, 2112, 12, 0x20, "AT45DB5122"}
-};
-
-//------------------------------------------------------------------------------
-// Exported functions
-//------------------------------------------------------------------------------
-
-//------------------------------------------------------------------------------
-/// Initializes an AT45 instance and configures SPI chip select register.
-/// Always returns 0.
-/// \param pAt45 Pointer to the At45 instance to initialize.
-/// \param pSpid Pointer to the underlying SPI driver.
-/// \param spiCs Chip select value to connect to the At45.
-//------------------------------------------------------------------------------
-unsigned char AT45_Configure(At45 *pAt45, Spid *pSpid, unsigned char spiCs)
-{
- SpidCmd *pCommand;
-
- // Sanity checks
- ASSERT(pSpid, "AT45_Configure: pSpid is 0.\n\r");
- ASSERT(pAt45, "AT45_Configure: pAt45 is 0.\n\r");
-
- // Initialize the At45 instance
- pAt45->pSpid = pSpid;
- pAt45->pDesc = 0;
- memset(pAt45->pCmdBuffer, 0, 8);
-
- // Initialize the spidCmd structure
- pCommand = &(pAt45->command);
- pCommand->pCmd = pAt45->pCmdBuffer;
- pCommand->callback = 0;
- pCommand->pArgument = 0;
- pCommand->spiCs = spiCs;
-
- return 0;
-}
-
-//------------------------------------------------------------------------------
-/// This function returns 1 if the At45 driver is not executing any command;
-/// otherwise it returns 0.
-/// \param pAt45 Pointer to an At45 instance.
-//------------------------------------------------------------------------------
-unsigned char AT45_IsBusy(At45 *pAt45)
-{
- return SPID_IsBusy(pAt45->pSpid);
-}
-
-//------------------------------------------------------------------------------
-/// Sends a command to the dataflash through the SPI. The command is identified
-/// by its command code and the number of bytes to transfer (1 + number of
-/// address bytes + number of dummy bytes). If data needs to be received, then
-/// a data buffer must be provided.
-/// This function does not block; its optional callback will be invoked when
-/// the transfer completes.
-/// \param pAt45 Pointer to an At45 driver instance.
-/// \param cmd Command code.
-/// \param cmdSize Size of command code + address bytes + dummy bytes.
-/// \param pData Data buffer.
-/// \param dataSize Number of data bytes to send/receive.
-/// \param address Address at which the command is performed if meaningful.
-/// \param callback Optional callback to invoke at end of transfer.
-/// \param pArgument Optional parameter to the callback function.
-//------------------------------------------------------------------------------
-unsigned char AT45_SendCommand(
- At45 *pAt45,
- unsigned char cmd,
- unsigned char cmdSize,
- unsigned char *pData,
- unsigned int dataSize,
- unsigned int address,
- SpidCallback callback,
- void *pArgument)
-{
- SpidCmd *pCommand;
- const At45Desc *pDesc = pAt45->pDesc;
- unsigned int dfAddress = 0;
-
- // Sanity checks
- ASSERT(pAt45, "AT45_Command: pAt45 is 0.\n\r");
- ASSERT(pDesc || (cmd == AT45_STATUS_READ),
- "AT45_Command: Device has no descriptor, only STATUS_READ command allowed\n\r");
-
- // Check if the SPI driver is available
- if (AT45_IsBusy(pAt45)) {
-
- return AT45_ERROR_LOCK;
- }
-
- // Compute command pattern
- pAt45->pCmdBuffer[0] = cmd;
-
- // Add address bytes if necessary
- if (cmdSize > 1) {
-
- ASSERT(pDesc, "AT45_Command: No descriptor for dataflash.\n\r");
- if (!configuredBinaryPage) {
- dfAddress =
- ((address / (pDesc->pageSize)) << pDesc->pageOffset)
- + (address % (pDesc->pageSize));
- }
- else {
- dfAddress = address;
- }
- // Write address bytes
- if (pDesc->pageNumber >= 16384) {
-
- pAt45->pCmdBuffer[1] = ((dfAddress & 0x0F000000) >> 24);
- pAt45->pCmdBuffer[2] = ((dfAddress & 0x00FF0000) >> 16);
- pAt45->pCmdBuffer[3] = ((dfAddress & 0x0000FF00) >> 8);
- pAt45->pCmdBuffer[4] = ((dfAddress & 0x000000FF) >> 0);
-
- if ((cmd != AT45_CONTINUOUS_READ) && (cmd != AT45_PAGE_READ)) {
-
- cmdSize++;
- }
- }
- else {
-
- pAt45->pCmdBuffer[1] = ((dfAddress & 0x00FF0000) >> 16);
- pAt45->pCmdBuffer[2] = ((dfAddress & 0x0000FF00) >> 8);
- pAt45->pCmdBuffer[3] = ((dfAddress & 0x000000FF) >> 0);
- }
- }
-
- // Update the SPI Transfer descriptors
- pCommand = &(pAt45->command);
- pCommand->cmdSize = cmdSize;
- pCommand->pData = pData;
- pCommand->dataSize = dataSize;
- pCommand->callback = callback;
- pCommand->pArgument = pArgument;
-
- // Send Command and data through the SPI
- if (SPID_SendCommand(pAt45->pSpid, pCommand)) {
-
- return AT45_ERROR_SPI;
- }
-
- return 0;
-}
-
-//------------------------------------------------------------------------------
-/// This function returns the At45Desc structure corresponding to the device
-/// connected
-/// It automatically initializes pAt45->pDesc field structure.
-/// This function shall be called by the application before AT45_SendCommand.
-/// Returns 0 if successful; Otherwise, returns AT45_ERROR_LOCK if the At45
-/// driver is in use or AT45_ERROR_SPI if there was an error with the SPI driver.
-/// \param pAt45 Pointer to an AT45 driver instance.
-/// \param status Device status register value.
-//------------------------------------------------------------------------------
-const At45Desc * AT45_FindDevice(At45 *pAt45, unsigned char status)
-{
- unsigned int i;
- unsigned char id = AT45_STATUS_ID(status);
-
- // Check if status is all one; in which case, it is assumed that no device
- // is connected
- if (status == 0xFF) {
-
- return 0;
- }
-
- // Look in device array
- i = 0;
- pAt45->pDesc = 0;
- while ((i < NUMDATAFLASH) && !(pAt45->pDesc)) {
-
- if (at45Devices[i].id == id) {
-
- pAt45->pDesc = &(at45Devices[i]);
- }
- i++;
- }
- configuredBinaryPage = AT45_STATUS_BINARY(status);
- return pAt45->pDesc;
-}
-
-//------------------------------------------------------------------------------
-/// This function returns the pagesize corresponding to the device connected
-/// \param pAt45 Pointer to an AT45 driver instance.
-//------------------------------------------------------------------------------
-unsigned int AT45_PageSize(At45 *pAt45)
-{
- unsigned int pagesize = pAt45->pDesc->pageSize;
- if(((pAt45->pDesc->hasBinaryPage) == 0) || !configuredBinaryPage){
- return pagesize;
- }
- return ((pagesize >> 8) << 8);
-}
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