unable to halt arm core failed to connect

最新推荐文章于 2022-05-09 17:02:58 发布

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最新推荐文章于 2022-05-09 17:02:58 发布

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本文详细记录了解决TQ2440开发板在使用J-Link进行程序下载时遇到的unable to halt arm core failed to connect问题的过程。通过尝试复位、擦除芯片程序等操作最终解决问题。

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昨天晚上在做MMU实验的时候，下载完程序后，J-FLASH的连接一直出现 unable to halt arm core failed to connect，当时很是郁闷，问TQ的售后，说是已经下班了。又琢磨了一段时间还是没有解决。今天又经过一番周折终于将问题解决。

开发板：TQ2440

配件：JLINK V7 + 转接板

软件：JLinkARM_V408i

下面是详细的步骤：

1）打开J-Link Commander

2）在J-Link>之后输入rx 0 注意0前空格

3）输完之后按下复位键

4）这是显示还不能成功再次执行rx 0

5）点击J-Flash的target->Erase chip，将芯片里面的程序擦除之后即可再此连接下载。

小感：

上面的解决方法是源自：

这个论坛

MikeQ的原话：

Obviously J-Link can "talk" to your chip.
The problem is that it can not halt the chip for some reason.
Most likely cause is that the target CPU has no clock or that
it is performing a memory access which halts the CPU indefinetly.

Can you
a) Check if the CPU has a clock
b) Check if there is a "WAit" Signal which may be active

If this does not help, try "rx 0" from J-Link Commander as follows:

SEGGER J-Link Commander V3.78a ('?' for help)
Compiled Dec 4 2007 22:18:44
DLL version V3.78a, compiled Dec 4 2007 22:18:35
Firmware: J-Link compiled Dec 03 2007 17:15:31 ARM Rev.5
Hardware: V5.30
S/N : 1
Feature(s) : RDI, FlashBP, FlashDL, JFlash, GDB
VTarget = 3.306V
Info: TotalIRLen = 4, IRPrint = 0x01
JTAG speed: 30 kHz
Found 1 JTAG device, Total IRLen = 4:
Id of device #0: 0x3F0F0F0F
Found ARM with core Id 0x3F0F0F0F (ARM7)
J-Link>speed 2000
JTAG speed: 2000 kHz
J-Link>rx 0
Reset delay: 0 ms
Reset type NORMAL: Using RESET pin, halting CPU after Reset
Info: TotalIRLen = 4, IRPrint = 0x01
Info: Resetting target using RESET pin
J-Link>

Does this help ?