what command can output OpenMV firmware version?
时间: 2024-04-08 17:32:52 浏览: 15
To output the OpenMV firmware version, you can use the following command:
```python
import pyb
print(pyb.firmware_version())
```
This will print the firmware version of your OpenMV camera to the console.
相关问题
Column 'firmware_version' in field list is ambiguous
这个错误是因为你的 SQL 查询中涉及到了多张表,这些表中都有 `firmware_version` 这个字段,而你没有明确指定使用哪张表的 `firmware_version` 字段。因此,MySQL 不知道你要使用哪个字段,就会报错 `Column 'firmware_version' in field list is ambiguous`。
为了解决这个问题,你需要在 SQL 查询中明确指定要使用哪张表的 `firmware_version` 字段。例如,如果你要使用 `table1` 表中的 `firmware_version` 字段,可以这样写 SQL 语句:
```
SELECT table1.firmware_version FROM table1, table2 WHERE table1.id = table2.id;
```
这样,就明确指定了要使用 `table1` 表中的 `firmware_version` 字段,而不会再出现 `Column 'firmware_version' in field list is ambiguous` 错误了。
RT_thread Old ST-LINK firmware version. Upgrade ST-LINK firmware
to use RT-Thread Studio
To use RT-Thread Studio with an old ST-LINK firmware version, you need to upgrade the ST-LINK firmware first. Here are the steps:
1. Download the latest version of ST-LINK firmware from STMicroelectronics website.
2. Connect your ST-LINK to your computer using a USB cable.
3. Open the ST-LINK Utility software and select your ST-LINK device.
4. Click on the "Upgrade Firmware" button.
5. Select the firmware file you downloaded in step 1 and click "Open".
6. Wait for the upgrade process to complete.
7. Close the ST-LINK Utility software.
Now you can use RT-Thread Studio with your upgraded ST-LINK firmware.