准备：JLink-V9或以上版本一台，J-Flash SPI软件。（可通过安装Jlink全家桶得到，下载地址： https://www.segger.com/downloads/jlink/ )

找到BIT模组，或者NEO的SPI接口，分别找到如下6个引脚：

BIT/NEO ——– 20Pin JTAG连接器

GND ——– 20

CLK/CK ——– 9

CS0 ——– 7

MO/MOSI ——– 5

MI/MISO ——– 13

VF ——– 1

打开J-FLASH SPI软件，然后Open Project中打开32m4b.jflash。

然后Open Datafile中找到要刷的uboot。然后会问起始地址，保持默认0点OK

菜单栏Target中点击Connect，此时Log窗口中显示 Connected successfully

然后再菜单栏Target中点击Program，会询问是否抹掉扇区，点击Yes。

LOG：

Programming target (111760 bytes, 1 range) ...
 - Reading affected sectors ...
  - 2 of 512 sectors affected, 1 range, 0x0 - 0x1FFFF
  - Target memory read successfully. (131072 bytes, 1 range)
 - Erasing affected sectors ...
  - 2 of 512 sectors affected, 1 range
  - Affected sectors 0 to 1 (0x0 - 0x1FFFF)
  - Erase operation completed successfully
 - Target programmed successfully - Completed after 2.421 sec

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