今天在通过stlink烧录一个长时间未用的STM32F407VET6 Black Board的时候, 出现错误Internal command errorFlash download failed target dll has been cancelled
板子上缺失两个boot跳线帽, 将跳线帽加上, 短接Boot0与GND, Boot1与GND (默认接线), 之后问题依旧.
检查stlink连接状态, 在Options for target的配置中, 检查debug中的Use, 使用的是ST-link Debugger, 点开右侧的Settings, 在SW Device中能看到ARM Core Sight SW-DP设备, 所以ST-link连接是对的.
打开STM32 ST-LINK Utility, 点击连接, 依然出现Internal command error, 根据提示, 修改target->settings下的Mode为 Connect under reset, 依然不行.
偶然发现在按开发板上的reset键后, 在STM32 ST-LINK Utility中点击连接能连上, 此时尝试烧录一个hex, 依然报Internal command error.
尝试Full chip erase, 这次没有出现失败, 全部地址都被擦写为FF. 在这之后再尝试连接, 以及烧录hex, 一切正常. 在Keil MDK中进行烧录, 也恢复正常.
烧录后运行一段时间, 再次出现Internal command error错误.
考虑到这块开发板上有这么多外设, 怀疑是供电问题. 将ST-Link的3V3线断开, 用USB连接开发板的MiniUSB口, 之后再烧录, 恢复正常.
在网上搜到一个说明 https://os.mbed.com/users/hudakz/code/STM32F407VET6_Hello/shortlog/
Warning
Please notice that VDD_TARGET is not connected. That works with the ST-Link programmer but
could potentially damage the target micro controller in case it's running at a lower voltage (e.g. 2V5)
than the programmer (e.g. 3V3). That's why it's recommended to connect also the VDD_TARGET line when
an external programmer such as a Segger J-Link is hooked up to program the board.
Provide power for the STM32F407VET6 board through a 3.3V pin, 5V pin or over a USB cable.
(The VDD_TARGET pin on the NUCLEO board CON4 does not work as source of power).
Connect the NUCLEO board to your PC over a USB cable.
To program the STM32F407VET6 board, click on the Compile button and save the binary to the NUCLEO
virtual disk注意其中的第二段: 通过3.3V脚, 5V脚或者USB给 STM32F407VET6 板子供电, VDD_TARGET脚不能用于供电
另外, 记录一下ST-link与STM32F407VET6 Black Board的接线方式 - 注意: 连接MiniUSB后, ST-link只需要连3根线, 3V3这根不连.
