W25X40BV.h

00001 // W25X40BV.h
00002 
00003 #ifndef W25X40BV_H
00004 #define W25X40BV_H
00005 
00006 #include "mbed.h"
00007 
00008 #define SPI_FREQ        1000000
00009 #define SPI_MODE        0
00010 #define SPI_NBIT        8
00011 
00012 #define WE_INST         0x06
00013 #define WD_INST         0x04
00014 #define R_INST          0x03
00015 #define W_INST          0x02
00016 #define C_ERASE_INST    0x60
00017 
00018 #define DUMMY_ADDR      0x00
00019 #define WAIT_TIME       1
00020 
00021 #define ADDR_BMASK2     0x00ff0000
00022 #define ADDR_BMASK1     0x0000ff00
00023 #define ADDR_BMASK0     0x000000ff
00024 
00025 #define ADDR_BSHIFT2    16
00026 #define ADDR_BSHIFT1    8
00027 #define ADDR_BSHIFT0    0
00028 
00029 class W25X40BV: public SPI {
00030 public:
00031     W25X40BV(PinName mosi, PinName miso, PinName sclk, PinName cs);
00032     
00033     int readByte(int addr);                                 // takes a 24-bit (3 bytes) address and returns the data (1 byte) at that location
00034     int readByte(int a2, int a1, int a0);                   // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0]
00035     void readStream(int addr, char* buf, int count);        // takes a 24-bit address, reads count bytes, and stores results in buf
00036     
00037     void writeByte(int addr, int data);                     // takes a 24-bit (3 bytes) address and a byte of data to write at that location
00038     void writeByte(int a2, int a1, int a0, int data);       // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0]
00039     void writeStream(int addr, char* buf, int count);       // write count bytes of data from buf to memory, starting at addr  
00040     
00041     void chipErase();                                       // erase all data on chip
00042     
00043 private:
00044     void writeEnable();                                     // write enable
00045     void writeDisable();                                    // write disable
00046     void chipEnable();                                      // chip enable
00047     void chipDisable();                                     // chip disable
00048     
00049    // SPI _spi;
00050     DigitalOut _cs;
00051 };
00052 
00053 #endif