CID.h

Go to the documentation of this file.

#pragma once

#include <Print.h>

namespace Storage::SD
{
struct __attribute__((packed)) CID {
    uint8_t mid;          
    char oid[2];          
    char pnm[5];          
    uint8_t prv;          
    uint32_t psn;         
    uint16_t mdt;         
    uint8_t not_used : 1; 
    uint8_t crc : 7;      

    void bswap()
    {
        psn = __builtin_bswap32(psn);
        mdt = __builtin_bswap16(mdt);
    }

    uint16_t mdt_year() const
    {
        return 2000 + ((mdt >> 4) & 0xff);
    }

    uint8_t mdt_month() const
    {
        return mdt & 0x0f;
    }

    uint8_t major() const
    {
        return prv >> 4;
    }

    uint8_t minor() const
    {
        return prv & 0x0f;
    }

    size_t printTo(Print& p) const;
};
static_assert(sizeof(CID) == 16, "Bad CID struct");

} // namespace Storage::SD