SSL.rar_BF518 SSL_DEMO_bf518_ssl.rar

/*******************************************************************************/ /* */ /* (C) Copyright 2008 - Analog Devices, Inc. All rights reserved. */ /* */ /* FILE: m25p16.c */ /* */ /* PURPOSE: Performs operations specific to the M25P16 flash device. */ /* */ /*******************************************************************************/ /* includes */ #ifdef __ADSPBF548__ #include <cdefBF548.h> #elif __ADSPBF518__ #include <cdefBF518.h> #elif __ADSPBF527__ #include <cdefBF527.h> #endif #include <ccblkfn.h> #include <stdio.h> #include <drivers\flash\util.h> #include <drivers\flash\Errors.h> #include <drivers\flash\m25p16.h> #define NUM_SECTORS 32 /* number of sectors in the flash device */ static char *pFlashDesc = "STMicro. M25P16"; static char *pDeviceCompany = "STMicroelectronics"; static int gNumSectors = NUM_SECTORS; #undef TIMEOUT #undef DELAY /* flash commands */ #define SPI_WREN (0x06) //Set Write Enable Latch #define SPI_WRDI (0x04) //Reset Write Enable Latch #define SPI_RDID (0x9F) //Read Identification #define SPI_RDSR (0x05) //Read Status Register #define SPI_WRSR (0x01) //Write Status Register #define SPI_READ (0x03) //Read data from memory #define SPI_FAST_READ (0x0B) //Read data from memory #define SPI_PP (0x02) //Program Data into memory #define SPI_SE (0xD8) //Erase one sector in memory #define SPI_BE (0xC7) //Erase all memory #define WIP (0x1) //Check the write in progress bit of the SPI status register #define WEL (0x2) //Check the write enable bit of the SPI status register #define SPI_PAGE_SIZE (528) #define SPI_SECTORS (512) #define SPI_SECTOR_SIZE (4224) #define SPI_SECTOR_DIFF (3968) #define PAGE_BITS (10) #define PAGE_SIZE_DIFF (496) #define DELAY 300 #define TIMEOUT 35000*64 char SPI_Page_Buffer[SPI_PAGE_SIZE]; int SPI_Page_Index = 0; char SPI_Status; /* function prototypes */ static ERROR_CODE SetupForFlash(); static ERROR_CODE GetCodes(); static ERROR_CODE Wait_For_nStatus(void); ERROR_CODE Wait_For_Status( char Statusbit ); static ERROR_CODE Wait_For_WEL(void); char ReadStatusRegister(void); void Wait_For_SPIF(void); extern void SetupSPI( const int spi_setting ); extern void SPI_OFF(void); void SendSingleCommand( const int iCommand ); unsigned long DataFlashAddress (unsigned long address); static ERROR_CODE EraseFlash(unsigned long ulStartAddr); static ERROR_CODE EraseBlock( int nBlock, unsigned long ulStartAddr ); static ERROR_CODE GetCodes(int *pnManCode, int *pnDevCode, unsigned long ulStartAddr); static ERROR_CODE GetSectorNumber( unsigned long ulAddr, int *pnSector ); static ERROR_CODE GetSectorStartEnd( unsigned long *ulStartOff, unsigned long *ulEndOff, int nSector ); static ERROR_CODE PollToggleBit(void); static ERROR_CODE ReadFlash(unsigned long ulOffset, unsigned short *pusValue ); static ERROR_CODE ResetFlash(unsigned long ulStartAddr); static ERROR_CODE WriteFlash(unsigned long ulOffset, unsigned short usValue ); static unsigned long GetFlashStartAddress( unsigned long ulAddr); ERROR_CODE m25p16_Open(void) { return (NO_ERR); } ERROR_CODE m25p16_Close(void) { return (NO_ERR); } ERROR_CODE m25p16_Read( unsigned short *pusData, unsigned long ulStartAddress, unsigned int uiCount ) { ERROR_CODE Result = NO_ERR; unsigned int i = 0; unsigned short *pusCurrentData = pusData; unsigned long ulCurrentAddress = ulStartAddress; for (i = 0; i < uiCount; i++, ulCurrentAddress++, pusCurrentData++) { SetupSPI( (COMMON_SPI_SETTINGS|TIMOD01) ); /* send the bulk erase command to the flash */ WriteFlash( ulCurrentAddress , SPI_READ ); WriteFlash( ulCurrentAddress , (ulCurrentAddress ) >> 16); WriteFlash( ulCurrentAddress , (ulCurrentAddress ) >> 8); WriteFlash( ulCurrentAddress , ulCurrentAddress ); /* read the data now */ Result = ReadFlash( ulCurrentAddress, pusCurrentData ); SPI_OFF(); } return(Result); } ERROR_CODE m25p16_Write( unsigned short *pusData, unsigned long ulStartAddress, unsigned int uiCount ) { ERROR_CODE Result = NO_ERR; unsigned int i = 0; unsigned char *pusCurrentData = (unsigned char *)pusData; unsigned long ulCurrentAddress = ulStartAddress; for (i = 0; i < uiCount; i++, ulCurrentAddress++, pusCurrentData++) { /* first, a "Write Enable" command must be sent to the SPI */ SendSingleCommand(SPI_WREN); /* second, the SPI Status Register will be tested whether the Write Enable Bit has been set */ Result = Wait_For_WEL(); if( POLL_TIMEOUT == Result ) return Result; else { SetupSPI( (COMMON_SPI_SETTINGS|TIMOD01) ); /* send the bulk erase command to the flash */ WriteFlash( ulCurrentAddress , SPI_PP ); WriteFlash( ulCurrentAddress , (ulCurrentAddress ) >> 16); WriteFlash( ulCurrentAddress , (ulCurrentAddress ) >> 8); WriteFlash( ulCurrentAddress , ulCurrentAddress ); /* program our actual value now */ Result = WriteFlash( ulCurrentAddress, *pusCurrentData ); SPI_OFF(); } } return(Result); } ERROR_CODE m25p16_Control( unsigned int uiCmd, COMMAND_STRUCT *pCmdStruct) { ERROR_CODE ErrorCode = NO_ERR; // switch on the command switch ( uiCmd ) { // erase all case CNTRL_ERASE_ALL: ErrorCode = EraseFlash(pCmdStruct->SEraseAll.ulFlashStartAddr); break; // erase sector case CNTRL_ERASE_SECT: ErrorCode = EraseBlock( pCmdStruct->SEraseSect.nSectorNum, pCmdStruct->SEraseSect.ulFlashStartAddr ); break; // get manufacturer and device codes case CNTRL_GET_CODES: ErrorCode = GetCodes((int *)pCmdStruct->SGetCodes.pManCode, (int *)pCmdStruct->SGetCodes.pDevCode, (unsigned long)pCmdStruct->SGetCodes.ulFlashStartAddr); break; case CNTRL_GET_DESC: //Filling the contents with data pCmdStruct->SGetDesc.pDesc = pFlashDesc; pCmdStruct->SGetDesc.pFlashCompany = pDeviceCompany; break; // get sector number based on address case CNTRL_GET_SECTNUM: ErrorCode = GetSectorNumber( pCmdStruct->SGetSectNum.ulOffset, (int *)pCmdStruct->SGetSectNum.pSectorNum ); break; // get sector number start and end offset case CNTRL_GET_SECSTARTEND: ErrorCode = GetSectorStartEnd( pCmdStruct->SSectStartEnd.pStartOffset, pCmdStruct->SSectStartEnd.pEndOffset, pCmdStruct->SSectStartEnd.nSectorNum ); break; // get the number of sectors case CNTRL_GETNUM_SECTORS: pCmdStruct->SGetNumSectors.pnNumSectors[0] = gNumSectors; break; // reset case CNTRL_RESET: ErrorCode = ResetFlash(pCmdStruct->SReset.ulFlashStartAddr); break; // no command or unknown command do nothing default: // set our error ErrorCode = UNKNOWN_COMMAND; break; } // return return(ErrorCode); } //----- H e l p e r F u n c t i o n s ----// //----------- R e s e t F l a s h ( ) ----------// // // PURPOSE // Sends a "reset" command to the flash. // // INPUTS // unsigned long ulStartAddr - flash start address