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+/* Driver for ATMEL DataFlash support
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+ * Author : Hamid Ikdoumi (Atmel)
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ *
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+ */
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+
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+#include <config.h>
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+#include <common.h>
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+
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+#ifdef CONFIG_HAS_DATAFLASH
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+#include <dataflash.h>
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+
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+
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+#define AT91C_TIMEOUT_WRDY 200000
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+
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+
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+/*----------------------------------------------------------------------*/
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+/* \fn AT91F_DataFlashSendCommand */
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+/* \brief Generic function to send a command to the dataflash */
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+/*----------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
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+ AT91PS_DataFlash pDataFlash,
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+ unsigned char OpCode,
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+ unsigned int CmdSize,
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+ unsigned int DataflashAddress)
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+{
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+ unsigned int adr;
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+
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+ if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
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+ return DATAFLASH_BUSY;
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+
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+ /* process the address to obtain page address and byte address */
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+ adr = ((DataflashAddress / (pDataFlash->pDevice->pages_size)) <<
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+ pDataFlash->pDevice->page_offset) + (DataflashAddress %
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+ (pDataFlash->pDevice->pages_size));
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+
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+ /* fill the command buffer */
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+ pDataFlash->pDataFlashDesc->command[0] = OpCode;
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+ if (pDataFlash->pDevice->pages_number >= 16384) {
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+ pDataFlash->pDataFlashDesc->command[1] =
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+ (unsigned char)((adr & 0x0F000000) >> 24);
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+ pDataFlash->pDataFlashDesc->command[2] =
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+ (unsigned char)((adr & 0x00FF0000) >> 16);
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+ pDataFlash->pDataFlashDesc->command[3] =
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+ (unsigned char)((adr & 0x0000FF00) >> 8);
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+ pDataFlash->pDataFlashDesc->command[4] =
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+ (unsigned char)(adr & 0x000000FF);
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+ } else {
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+ pDataFlash->pDataFlashDesc->command[1] =
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+ (unsigned char)((adr & 0x00FF0000) >> 16);
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+ pDataFlash->pDataFlashDesc->command[2] =
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+ (unsigned char)((adr & 0x0000FF00) >> 8);
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+ pDataFlash->pDataFlashDesc->command[3] =
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+ (unsigned char)(adr & 0x000000FF);
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+ pDataFlash->pDataFlashDesc->command[4] = 0;
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+ }
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+ pDataFlash->pDataFlashDesc->command[5] = 0;
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+ pDataFlash->pDataFlashDesc->command[6] = 0;
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+ pDataFlash->pDataFlashDesc->command[7] = 0;
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+
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+ /* Initialize the SpiData structure for the spi write fuction */
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+ pDataFlash->pDataFlashDesc->tx_cmd_pt =
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+ pDataFlash->pDataFlashDesc->command;
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+ pDataFlash->pDataFlashDesc->tx_cmd_size = CmdSize;
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+ pDataFlash->pDataFlashDesc->rx_cmd_pt =
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+ pDataFlash->pDataFlashDesc->command;
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+ pDataFlash->pDataFlashDesc->rx_cmd_size = CmdSize;
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+
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+ /* send the command and read the data */
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+ return AT91F_SpiWrite (pDataFlash->pDataFlashDesc); }
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+
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+
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+/*----------------------------------------------------------------------*/
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+/* \fn AT91F_DataFlashGetStatus */
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+/* \brief Read the status register of the dataflash */
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+/*----------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
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+{
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+ AT91S_DataFlashStatus status;
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+
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+ /* if a transfert is in progress ==> return 0 */
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+ if( (pDesc->state) != IDLE)
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+ return DATAFLASH_BUSY;
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+
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+ /* first send the read status command (D7H) */
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+ pDesc->command[0] = DB_STATUS;
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+ pDesc->command[1] = 0;
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+
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+ pDesc->DataFlash_state = GET_STATUS;
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+ pDesc->tx_data_size = 0; /* Transmit the command */
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+ /* and receive response */
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+ pDesc->tx_cmd_pt = pDesc->command;
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+ pDesc->rx_cmd_pt = pDesc->command;
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+ pDesc->rx_cmd_size = 2;
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+ pDesc->tx_cmd_size = 2;
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+ status = AT91F_SpiWrite (pDesc);
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+
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+ pDesc->DataFlash_state = *( (unsigned char *) (pDesc->rx_cmd_pt) +1);
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+
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+ return status;
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+}
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+
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+
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+/*----------------------------------------------------------------------*/
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+/* \fn AT91F_DataFlashWaitReady */
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+/* \brief wait for dataflash ready (bit7 of the status register == 1) */
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+/*----------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc
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+pDataFlashDesc, unsigned int timeout)
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+{
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+ pDataFlashDesc->DataFlash_state = IDLE;
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+
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+ do {
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+ AT91F_DataFlashGetStatus(pDataFlashDesc);
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+ timeout--;
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+ } while( ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) &&
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+ (timeout > 0) );
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+
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+ if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
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+ return DATAFLASH_ERROR;
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+
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+ return DATAFLASH_OK;
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+}
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+
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+
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+/*--------------------------------------------------------------------------*/
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+/* Function Name : AT91F_DataFlashContinuousRead */
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+/* Object : Continuous stream Read */
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+/* Input Parameters : DataFlash Service */
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+/* : <src> = dataflash address */
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+/* : <*dataBuffer> = data buffer pointer */
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+/* : <sizeToRead> = data buffer size */
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+/* Return value : State of the dataflash */
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+/*--------------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
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+ AT91PS_DataFlash pDataFlash,
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+ int src,
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+ unsigned char *dataBuffer,
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+ int sizeToRead )
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+{
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+ AT91S_DataFlashStatus status;
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+ /* Test the size to read in the device */
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+ if ( (src + sizeToRead) >
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+ (pDataFlash->pDevice->pages_size *
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+ (pDataFlash->pDevice->pages_number)))
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+ return DATAFLASH_MEMORY_OVERFLOW;
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+
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+ pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
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+ pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
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+ pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
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+ pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
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+
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+ status = AT91F_DataFlashSendCommand
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+ (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src);
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+ /* Send the command to the dataflash */
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+ return(status);
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+}
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+
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+
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+/*---------------------------------------------------------------------------*/
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+/* Function Name : AT91F_DataFlashPagePgmBuf */
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+/* Object : Main memory page program thru buffer 1 or buffer 2 */
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+/* Input Parameters : DataFlash Service */
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+/* : <*src> = Source buffer */
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+/* : <dest> = dataflash destination address */
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+/* : <SizeToWrite> = data buffer size */
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+/* Return value : State of the dataflash */
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+/*---------------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
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+ AT91PS_DataFlash pDataFlash,
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+ unsigned char *src,
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+ unsigned int dest,
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+ unsigned int SizeToWrite)
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+{
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+ int cmdsize;
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+ pDataFlash->pDataFlashDesc->tx_data_pt = src;
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+ pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite;
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+ pDataFlash->pDataFlashDesc->rx_data_pt = src;
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+ pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
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+
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+ cmdsize = 4;
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+ /* Send the command to the dataflash */
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+ if (pDataFlash->pDevice->pages_number >= 16384)
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+ cmdsize = 5;
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+ return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1,
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+cmdsize, dest)); }
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+
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+
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+/*---------------------------------------------------------------------------*/
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+/* Function Name : AT91F_MainMemoryToBufferTransfert */
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+/* Object : Read a page in the SRAM Buffer 1 or 2 */
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+/* Input Parameters : DataFlash Service */
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+/* : Page concerned */
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+/* : */
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+/* Return value : State of the dataflash */
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+/*---------------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
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+ AT91PS_DataFlash pDataFlash,
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+ unsigned char BufferCommand,
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+ unsigned int page)
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+{
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+ int cmdsize;
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+ /* Test if the buffer command is legal */
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+ if ((BufferCommand != DB_PAGE_2_BUF1_TRF)
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+ && (BufferCommand != DB_PAGE_2_BUF2_TRF))
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+ return DATAFLASH_BAD_COMMAND;
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+
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+ /* no data to transmit or receive */
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+ pDataFlash->pDataFlashDesc->tx_data_size = 0;
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+ cmdsize = 4;
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+ if (pDataFlash->pDevice->pages_number >= 16384)
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+ cmdsize = 5;
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+ return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, cmdsize,
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+page*pDataFlash->pDevice->pages_size));
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+}
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+
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+
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+/*-------------------------------------------------------------------------- */
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+/* Function Name : AT91F_DataFlashWriteBuffer */
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+/* Object : Write data to the internal sram buffer 1 or 2 */
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+/* Input Parameters : DataFlash Service */
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+/* : <BufferCommand> = command to write buffer1 or 2 */
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+/* : <*dataBuffer> = data buffer to write */
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+/* : <bufferAddress> = address in the internal buffer */
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+/* : <SizeToWrite> = data buffer size */
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+/* Return value : State of the dataflash */
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+/*---------------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
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+ AT91PS_DataFlash pDataFlash,
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+ unsigned char BufferCommand,
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+ unsigned char *dataBuffer,
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+ unsigned int bufferAddress,
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+ int SizeToWrite )
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+{
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+ int cmdsize;
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+ /* Test if the buffer command is legal */
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+ if ((BufferCommand != DB_BUF1_WRITE)
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+ && (BufferCommand != DB_BUF2_WRITE))
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+ return DATAFLASH_BAD_COMMAND;
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+
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+ /* buffer address must be lower than page size */
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+ if (bufferAddress > pDataFlash->pDevice->pages_size)
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+ return DATAFLASH_BAD_ADDRESS;
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+
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+ if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
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+ return DATAFLASH_BUSY;
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+
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+ /* Send first Write Command */
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+ pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
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+ pDataFlash->pDataFlashDesc->command[1] = 0;
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+ if (pDataFlash->pDevice->pages_number >= 16384) {
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+ pDataFlash->pDataFlashDesc->command[2] = 0;
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+ pDataFlash->pDataFlashDesc->command[3] =
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+ (unsigned char)(((unsigned int)(bufferAddress &
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+ pDataFlash->pDevice->byte_mask)) >> 8);
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+ pDataFlash->pDataFlashDesc->command[4] =
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+ (unsigned char)((unsigned int)bufferAddress & 0x00FF);
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+ cmdsize = 5;
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+ } else {
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+ pDataFlash->pDataFlashDesc->command[2] =
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+ (unsigned char)(((unsigned int)(bufferAddress &
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+ pDataFlash->pDevice->byte_mask)) >> 8);
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+ pDataFlash->pDataFlashDesc->command[3] =
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+ (unsigned char)((unsigned int)bufferAddress & 0x00FF);
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+ pDataFlash->pDataFlashDesc->command[4] = 0;
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+ cmdsize = 4;
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+ }
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+
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+ pDataFlash->pDataFlashDesc->tx_cmd_pt =
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+ pDataFlash->pDataFlashDesc->command;
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+ pDataFlash->pDataFlashDesc->tx_cmd_size = cmdsize;
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+ pDataFlash->pDataFlashDesc->rx_cmd_pt =
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+ pDataFlash->pDataFlashDesc->command;
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+ pDataFlash->pDataFlashDesc->rx_cmd_size = cmdsize;
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+
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+ pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
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+ pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
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+ pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
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+ pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite;
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+
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+ return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
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+}
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+
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+/*---------------------------------------------------------------------------*/
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+/* Function Name : AT91F_PageErase */
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+/* Object : Erase a page */
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+/* Input Parameters : DataFlash Service */
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+/* : Page concerned */
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+/* : */
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+/* Return value : State of the dataflash */
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+/*---------------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_PageErase(
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+ AT91PS_DataFlash pDataFlash,
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+ unsigned int page)
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+{
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+ int cmdsize;
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+ /* Test if the buffer command is legal */
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+ /* no data to transmit or receive */
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+ pDataFlash->pDataFlashDesc->tx_data_size = 0;
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+
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+ cmdsize = 4;
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+ if (pDataFlash->pDevice->pages_number >= 16384)
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+ cmdsize = 5;
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+ return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_ERASE, cmdsize,
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+page*pDataFlash->pDevice->pages_size));
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+}
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+
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+
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+/*---------------------------------------------------------------------------*/
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+/* Function Name : AT91F_BlockErase */
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+/* Object : Erase a Block */
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+/* Input Parameters : DataFlash Service */
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+/* : Page concerned */
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+/* : */
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+/* Return value : State of the dataflash */
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+/*---------------------------------------------------------------------------*/
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+AT91S_DataFlashStatus AT91F_BlockErase(
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+ AT91PS_DataFlash pDataFlash,
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+ unsigned int block)
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+{
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+ int cmdsize;
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+ /* Test if the buffer command is legal */
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+ /* no data to transmit or receive */
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+ pDataFlash->pDataFlashDesc->tx_data_size = 0;
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+ cmdsize = 4;
|
|
|
|
+ if (pDataFlash->pDevice->pages_number >= 16384)
|
|
|
|
+ cmdsize = 5;
|
|
|
|
+ return(AT91F_DataFlashSendCommand (pDataFlash, DB_BLOCK_ERASE,cmdsize,
|
|
|
|
+block*8*pDataFlash->pDevice->pages_size));
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+/* Function Name : AT91F_WriteBufferToMain */
|
|
|
|
+/* Object : Write buffer to the main memory */
|
|
|
|
+/* Input Parameters : DataFlash Service */
|
|
|
|
+/* : <BufferCommand> = command to send to buffer1 or buffer2 */
|
|
|
|
+/* : <dest> = main memory address */
|
|
|
|
+/* Return value : State of the dataflash */
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+AT91S_DataFlashStatus AT91F_WriteBufferToMain (
|
|
|
|
+ AT91PS_DataFlash pDataFlash,
|
|
|
|
+ unsigned char BufferCommand,
|
|
|
|
+ unsigned int dest )
|
|
|
|
+{
|
|
|
|
+ int cmdsize;
|
|
|
|
+ /* Test if the buffer command is correct */
|
|
|
|
+ if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
|
|
|
|
+ (BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
|
|
|
|
+ (BufferCommand != DB_BUF2_PAGE_PGM) &&
|
|
|
|
+ (BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
|
|
|
|
+ return DATAFLASH_BAD_COMMAND;
|
|
|
|
+
|
|
|
|
+ /* no data to transmit or receive */
|
|
|
|
+ pDataFlash->pDataFlashDesc->tx_data_size = 0;
|
|
|
|
+
|
|
|
|
+ cmdsize = 4;
|
|
|
|
+ if (pDataFlash->pDevice->pages_number >= 16384)
|
|
|
|
+ cmdsize = 5;
|
|
|
|
+ /* Send the command to the dataflash */
|
|
|
|
+ return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, cmdsize,
|
|
|
|
+ dest)); }
|
|
|
|
+
|
|
|
|
+
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+/* Function Name : AT91F_PartialPageWrite */
|
|
|
|
+/* Object : Erase partielly a page */
|
|
|
|
+/* Input Parameters : <page> = page number */
|
|
|
|
+/* : <AdrInpage> = adr to begin the fading */
|
|
|
|
+/* : <length> = Number of bytes to erase */
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+AT91S_DataFlashStatus AT91F_PartialPageWrite (
|
|
|
|
+ AT91PS_DataFlash pDataFlash,
|
|
|
|
+ unsigned char *src,
|
|
|
|
+ unsigned int dest,
|
|
|
|
+ unsigned int size)
|
|
|
|
+{
|
|
|
|
+ unsigned int page;
|
|
|
|
+ unsigned int AdrInPage;
|
|
|
|
+
|
|
|
|
+ page = dest / (pDataFlash->pDevice->pages_size);
|
|
|
|
+ AdrInPage = dest % (pDataFlash->pDevice->pages_size);
|
|
|
|
+
|
|
|
|
+ /* Read the contents of the page in the Sram Buffer */
|
|
|
|
+ AT91F_MainMemoryToBufferTransfert(pDataFlash,
|
|
|
|
+ DB_PAGE_2_BUF1_TRF, page);
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+ /*Update the SRAM buffer */
|
|
|
|
+ AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src,
|
|
|
|
+ AdrInPage, size);
|
|
|
|
+
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+
|
|
|
|
+ /* Erase page if a 128 Mbits device */
|
|
|
|
+ if (pDataFlash->pDevice->pages_number >= 16384) {
|
|
|
|
+ AT91F_PageErase(pDataFlash, page);
|
|
|
|
+ /* Rewrite the modified Sram Buffer in the main memory */
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ /* Rewrite the modified Sram Buffer in the main memory */
|
|
|
|
+ return(AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM,
|
|
|
|
+ (page*pDataFlash->pDevice->pages_size)));
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+/* Function Name : AT91F_DataFlashWrite */
|
|
|
|
+/* Object : */
|
|
|
|
+/* Input Parameters : <*src> = Source buffer */
|
|
|
|
+/* : <dest> = dataflash adress */
|
|
|
|
+/* : <size> = data buffer size */
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+AT91S_DataFlashStatus AT91F_DataFlashWrite(
|
|
|
|
+ AT91PS_DataFlash pDataFlash,
|
|
|
|
+ unsigned char *src,
|
|
|
|
+ int dest,
|
|
|
|
+ int size )
|
|
|
|
+{
|
|
|
|
+ unsigned int length;
|
|
|
|
+ unsigned int page;
|
|
|
|
+ unsigned int status;
|
|
|
|
+
|
|
|
|
+ AT91F_SpiEnable(pDataFlash->pDevice->cs);
|
|
|
|
+
|
|
|
|
+ if ( (dest + size) > (pDataFlash->pDevice->pages_size *
|
|
|
|
+ (pDataFlash->pDevice->pages_number)))
|
|
|
|
+ return DATAFLASH_MEMORY_OVERFLOW;
|
|
|
|
+
|
|
|
|
+ /* If destination does not fit a page start address */
|
|
|
|
+ if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0 )
|
|
|
|
+ {
|
|
|
|
+ length = pDataFlash->pDevice->pages_size -
|
|
|
|
+ (dest %
|
|
|
|
+ ((unsigned int)
|
|
|
|
+ (pDataFlash->pDevice->pages_size)));
|
|
|
|
+
|
|
|
|
+ if (size < length)
|
|
|
|
+ length = size;
|
|
|
|
+
|
|
|
|
+ if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
|
|
|
|
+ return DATAFLASH_ERROR;
|
|
|
|
+
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+
|
|
|
|
+ /* Update size, source and destination pointers */
|
|
|
|
+ size -= length;
|
|
|
|
+ dest += length;
|
|
|
|
+ src += length;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
|
|
|
|
+ /* program dataflash page */
|
|
|
|
+ page = (unsigned int)dest / (pDataFlash->pDevice->pages_size);
|
|
|
|
+
|
|
|
|
+ status = AT91F_DataFlashWriteBuffer(pDataFlash,
|
|
|
|
+ DB_BUF1_WRITE, src, 0,
|
|
|
|
+ pDataFlash->pDevice->pages_size);
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+
|
|
|
|
+ status = AT91F_PageErase(pDataFlash, page);
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+ if (!status)
|
|
|
|
+ return DATAFLASH_ERROR;
|
|
|
|
+
|
|
|
|
+ status = AT91F_WriteBufferToMain (pDataFlash,
|
|
|
|
+ DB_BUF1_PAGE_PGM, dest);
|
|
|
|
+ if(!status)
|
|
|
|
+ return DATAFLASH_ERROR;
|
|
|
|
+
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+
|
|
|
|
+ /* Update size, source and destination pointers */
|
|
|
|
+ size -= pDataFlash->pDevice->pages_size;
|
|
|
|
+ dest += pDataFlash->pDevice->pages_size;
|
|
|
|
+ src += pDataFlash->pDevice->pages_size;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ /* If still some bytes to read */
|
|
|
|
+ if ( size > 0 ) {
|
|
|
|
+ /* program dataflash page */
|
|
|
|
+ if(!AT91F_PartialPageWrite(pDataFlash, src, dest, size) )
|
|
|
|
+ return DATAFLASH_ERROR;
|
|
|
|
+
|
|
|
|
+ AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY);
|
|
|
|
+ }
|
|
|
|
+ return DATAFLASH_OK;
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+/* Function Name : AT91F_DataFlashRead */
|
|
|
|
+/* Object : Read a block in dataflash */
|
|
|
|
+/* Input Parameters : */
|
|
|
|
+/* Return value : */
|
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
|
+int AT91F_DataFlashRead(
|
|
|
|
+ AT91PS_DataFlash pDataFlash,
|
|
|
|
+ unsigned long addr,
|
|
|
|
+ unsigned long size,
|
|
|
|
+ char *buffer)
|
|
|
|
+{
|
|
|
|
+ unsigned long SizeToRead;
|
|
|
|
+
|
|
|
|
+ AT91F_SpiEnable(pDataFlash->pDevice->cs);
|
|
|
|
+
|
|
|
|
+ if(AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
|
|
|
|
+ return -1;
|
|
|
|
+
|
|
|
|
+ while (size) {
|
|
|
|
+ SizeToRead = (size < 0x8000)? size:0x8000;
|
|
|
|
+
|
|
|
|
+ if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
|
|
|
|
+ AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
|
|
|
|
+ return -1;
|
|
|
|
+
|
|
|
|
+ if (AT91F_DataFlashContinuousRead (pDataFlash, addr,
|
|
|
|
+ (uchar *) buffer, SizeToRead) != DATAFLASH_OK)
|
|
|
|
+ return -1;
|
|
|
|
+
|
|
|
|
+ size -= SizeToRead;
|
|
|
|
+ addr += SizeToRead;
|
|
|
|
+ buffer += SizeToRead;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ return DATAFLASH_OK;
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+
|