SST25VF064C.h

00001 ///////////////////////////////////////////////////////////////////////////////
00002 // SST25VF064C.cpp - Flash driver
00003 //
00004 // COPYRIGHT (c) 2012 by David Van Wagner
00005 //
00006 // dave@vanwagner.org
00007 // http://techwithdave.blogspot.com
00008 //
00009 // License: Creative Commons Attribution-ShareAlike 3.0 Unported License
00010 // http://creativecommons.org/licenses/by-sa/3.0/
00011 ///////////////////////////////////////////////////////////////////////////////
00012 
00013 #include <mbed.h>
00014 #ifdef SPIDEBUG
00015 #include "SPIDebug.h"
00016 extern bool debug;
00017 #endif
00018 
00019 class SST25VF064C
00020 {
00021 public:
00022     typedef char int8;
00023     typedef short int16;
00024     typedef long int32;
00025     typedef long long int64;
00026     
00027     typedef unsigned char uint8;
00028     typedef unsigned short uint16;
00029     typedef unsigned long uint32;
00030     typedef unsigned long long uint64;
00031 
00032     static const int SID_LEN = 32;
00033     static const int SECTOR_LEN = 4096;
00034     static const int PAGE_LEN = 256;
00035     static const int MAX_ADDR = 0x7FFFFF;
00036 
00037 private:
00038 #ifdef SPIDEBUG
00039     SPIDebug* spi;
00040     CSDebug* cs;
00041 #else
00042     SPI* spi;
00043     DigitalOut* cs;
00044 #endif    
00045     int frequency;
00046     
00047     static uint8 SID_buffer[SID_LEN];
00048     static uint8 sector_buffer[SECTOR_LEN];
00049     static int32 buffered_addr;
00050     static bool buffered_erased;
00051 
00052 public:
00053     SST25VF064C(PinName mosi, PinName miso, PinName sclk, PinName cs, int frequency=10000000);
00054     ~SST25VF064C();
00055     
00056     uint16 Id();
00057     uint32 JEDECId();
00058     uint8* SID(); // Security ID (128 bits = 16 bytes)
00059 
00060     // Read Status Register    
00061     // bit 0 BUSY 1=Write in progress
00062     // bit 1 WEL  1=Write Enabled
00063     // bit 2 BP0  block write protection
00064     // bit 3 BP1  block write protection
00065     // bit 4 BP2  block write protection
00066     // bit 5 BP3  block write protection
00067     // bit 6 SEC  1=Security ID space locked
00068     // bit 7 BPL  1=BP0..BP3 are read-only, 0=r/w
00069     uint8 RDSR();
00070     void EWSR(); // Enable Write Status Register
00071     void WRSR(uint8 status); // Write Status Register
00072     
00073     void WREN(); // Write Enable
00074     void WRDI(); // Write Disable
00075     bool BUSY(); // Write in Progress
00076     bool WEL(); // Write Enabled
00077     uint8 BP(); // Block Protection
00078     bool SEC(); // Security ID Locked
00079     bool BPL(); // Block Protection Locked
00080     void wait_while_busy();
00081 
00082     uint8 read(int32 addr);
00083     bool read(int32 addr, uint8* dst, int32 len);
00084     void hsread(int32 addr, uint8* dst, int32 len, int frequency);
00085 
00086     void sector_erase_4k(int32 addr);
00087     void block_erase_32k(int32 addr);
00088     void block_erase_64k(int32 addr);
00089     void chip_erase();
00090 
00091     bool page_program(int32 addr, uint8* write_buffer, short len);
00092     bool write(int32 addr, uint8* write_buffer, int32 len);
00093     bool rewrite(int32 addr, uint8* write_buffer, int32 len);
00094 
00095     bool buffered_write(uint8 data);
00096     bool buffered_write(uint8* src, int len);
00097     uint8 buffered_read();
00098     bool buffered_read(uint8* dest, int len);
00099     void buffered_seek(int32 addr);
00100     void buffered_sync();
00101 };