menu "DCU OTA Configuration"

    config DCU_SPI_CLOCK_HZ
        int "SPI clock frequency for GD32 (Hz)"
        default 4000000
        range 1000000 20000000
        help
            SPI clock speed between ESP32-C3 and GD32E50x.
            Higher value speeds up GD32 OTA relay, but must be
            validated against actual wiring length/quality and GD32
            SPI slave timing.

    config DCU_OTA_PACKET_INTERVAL_MS
        int "Delay between GD32 OTA packets (ms)"
        default 1
        range 0 50
        help
            Idle delay inserted after each successfully acknowledged
            firmware packet before sending the next one.
            Lower value speeds up OTA, but if GD32 cannot finish
            flash write / prepare next ACK in time, set it back.

    config DCU_OTA_POLL_BACKOFF_MS
        int "Polling backoff when GD32 is not ready (ms)"
        default 2
        range 0 50
        help
            Delay between SPI response polls when GD32 returns WAIT
            or does not drive MISO yet. Lower value reduces per-packet
            idle time and can significantly speed up OTA, but if GD32
            cannot finish flash write before the next poll, increase it.

    config DCU_OTA_FINISH_TIMEOUT_MS
        int "Timeout for FINISH_OTA command (ms)"
        default 10000
        range 3000 60000
        help
            How long ESP32 waits for GD32 to respond to the FINISH_OTA
            command. GD32 may need extra time to drain flash buffers,
            verify firmware, or prepare the APP jump.

endmenu