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J-Link 仿真器固件恢复小记

J-Link 采用了爱特梅尔（ ATMEL ）公司的 ARM7 架构微控制器 AT91SAM7S64 作为主控芯片，2017 年 Atmel 已经被微芯半导体（ Microchip ）收购，进行所有恢复工作之前，需要先访问其官网下载微控制器所对应的程序烧录工具 SAM-BA 2.18 for Windows 。J-Link 仿真器固件由 SEGGER 开发，因此同样需要前往其官网下载最新的 J-Link 驱动工具包 ，以及 J-Link ARM V8 稳定版固件。

J-Link 仿真器固件恢复小记

准备好上述三个工具之后，首先需要擦除 J-Link 板载 Flash 上面的原有固件，即先给 J-Link 通电，然后短接 ERASE 跳线帽，保持 20 秒之后再断电并移除跳线帽。

J-Link 仿真器固件恢复小记

然后将 SAM-BA 固件复制到 FLASH 的前两个扇区，即短接 PCB 板上的 TST 跳线帽，然后给 J-Link 通电，在保持短接状态 30 秒后断电并移除跳线帽。

J-Link 仿真器固件恢复小记

完成上述两个步骤之后，应该在 Windows 10 操作系统的设备管理器当中看到如下界面：

J-Link 仿真器固件恢复小记

这表示 JLINK 已经被驱动正确的识别，接下来就可以打开 SAM-BA 并在界面选择如下设置：

J-Link 仿真器固件恢复小记

点击【connect】按钮之后进入固件烧写主界面，并选择【Send File Name】按钮选择已经下载好的 J-Link ARM V8 固件：

J-Link 仿真器固件恢复小记

点击【Send File】开始烧写固件，此时会询问你是否解锁已经锁定的区域，这里选择【是】。

J-Link 仿真器固件恢复小记

烧写快要完成的时候，会弹出是否锁定固件存储区域的提示，这里必须选择【否】，不然后面会影响到 J-Link 的正常连接与工作。

J-Link 仿真器固件恢复小记

jlink 固件烧写成功之后， SAM-BA 会在软件的底部区域展示如下日志信息：

loading history file ... 0 events added
SAM-BA console display active (Tcl8.5.9 / Tk8.5.9)
(sam-ba_2.18) 1 %
(sam-ba_2.18) 1 % send_file {Flash} "D:/Embedded/JLink V8/jlink-v8.bin" 0x100000 0
-I- Send File D:/Embedded/JLink V8/jlink-v8.bin at address 0x100000
 first_sector 0 last_sector 15
-I- 	Writing: 0x1500 bytes at 0x0 (buffer addr : 0x202994)
-I- Sector 0 unlocked
-I- Sector 1 unlocked
-I- Sector 2 unlocked
-I- Sector 3 unlocked
-I- Sector 4 unlocked
-I- Sector 5 unlocked
-I- Sector 6 unlocked
-I- Sector 7 unlocked
-I- Sector 8 unlocked
-I- Sector 9 unlocked
-I- Sector 10 unlocked
-I- Sector 11 unlocked
-I- Sector 12 unlocked
-I- Sector 13 unlocked
-I- Sector 14 unlocked
-I- Sector 15 unlocked
-I- 	Writing: 0x1500 bytes at 0x0 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0x1500 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0x2A00 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0x3F00 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0x5400 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0x6900 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0x7E00 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0x9300 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0xA800 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0xBD00 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0xD200 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x1500 bytes at 0xE700 (buffer addr : 0x202994)
-I- 	0x1500 bytes written by applet
-I- 	Writing: 0x400 bytes at 0xFC00 (buffer addr : 0x202994)
-I- 	0x400 bytes written by applet
Do not lock

最后，关闭 SAM-BA 并将 J-Link 断电，重新通电后 LED 指示灯点亮，表示 J-Link 已经开始工作，接下来打开 J-Link Commander 查看它的工作状态，此时会弹出一个固件升级提示信息，为了保持当前硬件兼容性这里选择【否】跳过升级：

J-Link 仿真器固件恢复小记