Function SPIReadSaveData

3ds/source/spi.cpp:288–337

}

Result SPIReadSaveData(CardType type, u32 offset, void* data, u32 size)
{
    u8 cmd[4]   = {SPI_CMD_READ};
    u32 cmdSize = 4;
    if (size == 0)
        return 0;
    if (type == NO_CHIP)
        return 0xC8E13404;

    Result res = SPIWaitWriteEnd(type);
    if (res)
        return res;

    size    = (size <= SPIGetCapacity(type) - offset) ? size : SPIGetCapacity(type) - offset;
    u32 pos = offset;
    switch (type) {
        case EEPROM_512B:
            return _SPIReadSaveData_512B_impl(offset, data, size);
            break;
        case EEPROM_8KB:
        case EEPROM_64KB:
            cmdSize = 3;
            cmd[1]  = (u8)(pos >> 8);
            cmd[2]  = (u8)pos;
            break;
        case EEPROM_128KB:
            cmdSize = 4;
            cmd[1]  = (u8)(pos >> 16);
            cmd[2]  = (u8)(pos >> 8);
            cmd[3]  = (u8)pos;
            break;
        case FLASH_256KB_1:
        case FLASH_256KB_2:
        case FLASH_512KB_1:
        case FLASH_512KB_2:
        case FLASH_1MB:
        case FLASH_8MB:
        case FLASH_512KB_INFRARED:
        case FLASH_256KB_INFRARED:
            cmdSize = 4;
            cmd[1]  = (u8)(pos >> 16);
            cmd[2]  = (u8)(pos >> 8);
            cmd[3]  = (u8)pos;
            break;
        default:
            return 0; // never happens
    }

    return SPIWriteRead(type, cmd, cmdSize, data, size, NULL, 0);
}

Result SPIEraseSector(CardType type, u32 offset)
{