#ifndef NORFLASH_H
#define NORFLASH_H
#include <stdint.h>
#include "spiblocked.h"
    /// Enumerace povelů pro SPI FLASH.
    enum FLASH_COMMANDS : uint8_t {
      /* single byte commands */
      FLASH_WRDI = 0x04,    // nepoužito
      FLASH_WREN = 0x06,
      FLASH_RDID = 0x9F,
      FLASHRSTEN = 0x66,    // nepoužito
      FLASH__RST = 0x99,    // nepoužito
      FLASH__RES = 0xAB,    // release from power down, nepoužito
      FLASH__DPD = 0xB9,    // power down, nepoužito
      // multi - byte
      FLASH_RDSR1 = 0x05,
      // dále se mohou povely lišit
      FLASH_RDSR2 = 0x35,   // nepoužito
      FLASH_4READ = 0x03,
      FLASH_4PP   = 0x02,
      FLASH_4SE   = 0x20,
    };

class NorFlash {
  SpiBlocked spi;
  public:
    explicit NorFlash () noexcept;
    unsigned ReadBlock   (const unsigned addr,       uint8_t * data, const unsigned len);
    unsigned WriteBlock  (const unsigned addr, const uint8_t * data, const unsigned len);
    bool     EraseSector (const unsigned addr);
  protected:
    /// Jednoduchý příkaz
    bool     SingleCommand (const FLASH_COMMANDS cmd) const;
    /// Načtení registru STATUS1 nebo STATUS2 pomocí FLASH_RDSRx
    uint8_t  ReadStatus    (const FLASH_COMMANDS cmd) const;
    /// Čekání na dokončení operace zápisu / mazání
    bool     WaitForReady  (const unsigned ms = 5u) const;
};

#endif // NORFLASH_H