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闲来无事，折腾下这个NVR，首先找到TTL口，连上TTL线，打开串口工具，波特率设置为115200。

输出：

U-Boot 2010.06 (Sep 12 2014 - 15:20:31)Check spi flash controller v350... FoundSpi(cs1) ID: 0xEF 0x40 0x18 0x00 0x00 0x00spi->chipsize:16778240start_up_mode is 3biteSpi(cs1): Block:64KB Chip:16385KB Name:"W25Q128B"Spi(cs1): 3 addr SPI read:0x5,6B,0xc write:0x5,32,0xc erase:0x0,D8,0xcnum_chip of Spi: 1In:    serialOut:   serialErr:   serial(Re)start USB search...USB:   scanning bus for devices... 1 USB Device(s) found       scanning bus for storage devices... 0 Storage Device(s) foundHit any key to stop autoboot:  0saveaddr: 82000000do_netupdateHisilicon ETH net controlerMAC:   00-00-23-34-45-66UP_PORT : phy status change : LINK=UP : DUPLEX=FULL : SPEED=100MJVUpd StartOurPort: 1350starting...packet not correct: des: 137, our: 1350packet not correct: des: 137, our: 1350packet not correc

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