void LOG_Send(uint32_t storage, void *data, uint32_t size)
{
    char buf[size];  //size of data???
    uint32_t i = 0;
    while (data)
    {
        buf[i++] = (char *)(*data++);
    }
    
    switch (storage)
    {
        case SD:
          SD_Log("log.txt", buf);
        break;
        case FLASH:
          Flash_Log(log_addr, buf);
        break;
        case UART:
          UART_SendString(UART2, buf);
        break;
    }
}