w25qflash.h

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#ifndef w25q_h
#define w25q_h

// === W25Q INSTRUCTION SET ===

#define W25Q_READID   0x90

#define W25Q_WEN      0x06
#define W25Q_WDI      0x04

#define W25Q_READ     0x03

#define W25Q_PROG_PAGE 0x02

#define W25Q_ERASE_SECTOR  0x20  // 4 KByte
#define W25Q_ERASE_BLOCK1  0x52  // 32 KByte
#define W25Q_ERASE_BLOCK2  0xD8  // 64 KByte
#define W25Q_ERASE_CHIP    0xC7  // 1024 KByte

#define W25Q_SR_WEN    0x50
#define W25Q_SR_READ1  0x05
#define W25Q_SR_READ2  0x35
#define W25Q_SR_WRITE  0x01 

// === W25Q MASKS ===

#define W25Q_MASK_BSY (0x01 << 0)
#define W25Q_MASK_WEL (0x01 << 1)


#include "Arduino.h"

class W25QFlash {
    
public :
    
    W25QFlash(void);
    
    void setCSPin(byte csPin);
    
    boolean verifyMem();
    
    void waitFree();
    void setWriteEnable(bool state = true);
    
    void read(unsigned long addr, byte buffer[], unsigned long n);
    void program(unsigned long addr, byte buffer[], unsigned long n);
    void erase(unsigned long addr, byte command = W25Q_ERASE_SECTOR);
    
protected:
    
    void _select() {digitalWrite(_csPin,LOW);}
    void _deselect() {digitalWrite(_csPin,HIGH);}
    byte _getStatus();
    void _sendCmdAddr(byte cmd, unsigned long addr);
    
private :
    
    byte _csPin;
    
};

#endif