blocks|key|265941|text|好了，这就是我所做的，现在它似乎起作用了(我会尽量做到描述性的，这样你或任何被困在这里的人都可以比较一下)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|265942|265943|我在Ubuntu下使用的是STM32CubeProgrammer+v2.6.0。连接到目标are:|ordered-list-item|265944|Port:+reset|unordered-list-item|265945|Shared:+Disabled|265946|I'm的参数|265947|Freq:+4000+kHz|265948|模式:+Normal|265949|Access端口:0|265950|重置模式:软件端口使用STM32f4发现作为编程器，为实现此目的，应断开跳线。这是假设，SB11跳线(在电路板下)也应该是非焊接的，但正如你会看到，我没有使用社会福利署的复位线路。目标(STM32F103C8T6)独立供电(%2B3.3V)。|265951|265952|265953|目标和程序员之间的连接如下所示：|265954|265955|265956|Prog+pin1+(|265957|Prog+pin1)+-->+NC|265958|Prog+pin2+(SWD时钟)+-->+PA14+pin3+(GND)+-->+VSS+(Pins#+23、35、47和9，如果是通用数字模拟地)|265959|Prog+pin4+(SWD+I/O)+-->+PA13+NSRT+(NSRT)+-->+NC|265960|Prog+pin6+(SWO)+-->+NCF239|265961|265962|265963|我可以通过一个按钮访问目标的NSRT+(Pin#7)+(这很重要)。|265964|一旦所有这些都准备好了，我所做的就是按住重置按钮，然后在STM32CubeProgrammer中按下连接按钮(不释放重置)，等待两秒钟，然后释放重置。在这个过程之后，目标是连接的，我能够正常地对它进行编程。程序不会立即运行，您需要再次按下并释放重置按钮。|265965|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|1|1|1|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|1K|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|1L|8|@]|9|@]|A|$]]|$1|I|3|J|5|H|7|1M|8|@]|9|@]|A|$]]|$1|K|3|L|5|E|7|1N|8|@]|9|@]|A|$]]|$1|M|3|N|5|E|7|1O|8|@]|9|@]|A|$]]|$1|O|3|P|5|E|7|1P|8|@]|9|@]|A|$]]|$1|Q|3|R|5|E|7|1Q|8|@]|9|@]|A|$]]|$1|S|3|T|5|E|7|1R|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1S|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]|$1|W|3|X|5|E|7|1U|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]|$1|10|3|11|5|H|7|1X|8|@]|9|@]|A|$]]|$1|12|3|13|5|H|7|1Y|8|@]|9|@]|A|$]]|$1|14|3|15|5|H|7|1Z|8|@]|9|@]|A|$]]|$1|16|3|17|5|H|7|20|8|@]|9|@]|A|$]]|$1|18|3|19|5|H|7|21|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|22|8|@]|9|@]|A|$]]|$1|1B|3|-4|5|6|7|23|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|6|7|24|8|@]|9|@]|A|$]]|$1|1E|3|1F|5|6|7|25|8|@]|9|@]|A|$]]|$1|1G|3|-4|5|6|7|26|8|@]|9|@]|A|$]]]|1H|$]]

Ok, this is what I did and now it seems to be working (I'll try to be as descriptive as I can, so you or anyone who's got stuck into this can compare):
<ol>
<li>I'm using STM32CubeProgrammer v2.6.0 under Ubuntu. The parameters to connect to the target are:</li>
</ol>
<ul>
<li>Port: SWD</li>
<li>Freq: 4000 kHz</li>
<li>Mode: Normal</li>
<li>Access Port: 0</li>
<li>Reset Mode: Software reset</li>
<li>Shared: Disabled</li>
</ul>
<ol start="2">
<li>I'm using an STM32f4 Discovery as a programmer, to achieve this the jumpers should be disconnected. It is supposed that SB11 jumper (under the board) should be unsoldered too, but as you will see I'm not using the reset line on SWD. The target (STM32F103C8T6) is powered independently (+3.3V).
</li>
<li>The connections between the target and programmer are the following:
</li>
</ol>
<ul>
<li>Prog pin1 (VDD) --&gt; NC</li>
<li>Prog pin2 (SWD Clock) --&gt; PA14 (Pin#37)</li>
<li>Prog pin3 (GND) --&gt; VSS (Pins# 23,35,47 and 9 if common digital analog ground)</li>
<li>Prog pin4 (SWD I/O) --&gt; PA13 (Pin#34)</li>
<li>Prog pin5 (NSRT) --&gt; NC</li>
<li>Prog pin6 (SWO) --&gt; NC</li>
</ul>
I have access to the target's NSRT (Pin#7) through a push-button (this is important).
Once all this is ready, what I did was to press and hold the reset button, then press the connect button in STM32CubeProgrammer (without releasing the reset), and wait just two seconds, then release the reset. After this process, the target was connected and I was able to program it normally.
The program will not run immediately, you need to push and release the reset button again.

blocks|key|265997|text|朱莉安-+(DEV_TARGET_HELD_UNDER_RESET)信息意味着有什么东西让nrst保持在地面上。在这种模式下，除了“热插拔”之外，你不能做太多的事情。如果你有一个复位按钮，那么它可能在连接的位置出现故障，这会将NRST拉到地面，从而击败internall+it。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|265998|你能检查一下你的复位按钮在上下位置的阻力吗？我怀疑它是0欧姆(或至少低于内部上拉电阻)。|265999|如果你没有重置按钮，那么检查NRST周围是什么电路，并尝试找出为什么它拉到地面。|266000|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Juliane - the (DEV_TARGET_HELD_UNDER_RESET) message means that something is holding nrst to ground. You can't do much apart from 'hot plug' when in this mode. If you have a reset button then it may have failed in a connected position which will pull NRST to ground defeating the internall pullup.
Can you check the resistance across you reset button in down and up position. I suspect it is 0 ohms (or at least lower than internall pullup resistor).
If you don't have a reset button then check to see what circuitry is around NRST and try to work out why its pulling to ground.

So I'm using an STM32F103C8T6 board and it was working fine a few days ago but then tried to load a code with keil vision compiler these days and it showed this message STLINK Error(DEV_TARGET_HELD_UNDER_RESET).
After that using the STM32CubeProgrammer also shows the same problem, only connects with the &quot;hot plug&quot; mode
<a href="https://i.stack.imgur.com/J8p3z.png" rel="nofollow noreferrer">as you can see here</a>
Its cleary a reset error, but I really dont know how it happened and don't find much resources on the internet with this problem and now I can't download any code in my stm32f103 board it shows
<a href="https://i.stack.imgur.com/P226S.png" rel="nofollow noreferrer">this message</a>
After researching on the internet found it might be soldering problem, but I dont think its the case, i'm only using the microcontroller, not any bread board circuit, and it was perfectly fine days ago. All my write and read protections checkboxes are unchecked in the STM32CubeProgrammer sections too.
I guy on the stcommunity just said &quot;he went through all CPU pins and the board started working.&quot; but is it a problem with the pin reset? in the STM32F103C8T6 board it has a reset buton but how can a search a problem in it?

ST LINK Error (DEV_TARGET_HELD_UNDER_RESET)

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我使用的是一块STM32F103C8T6板，几天前它还工作得很好，但最近我尝试用keil vision编译器加载代码时，它显示了这条消息: STLINK Error(DEV_TARGET_HELD_UNDER_RESET)。之后，使用STM32CubeProgrammer也会显示出同样的问题，只使用“热插拔”模式的进行...

问ST链接错误(DEV_TARGET_HELD_UNDER_RESET)
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问ST链接错误(DEV_TARGET_HELD_UNDER_RESET)EN