通常所有数字引脚都连接到VDDIO，内部模拟前端部分使用VDD。
如果需要测试芯片组，请确保在VDDIO上有外部上拉电阻。
你需要简单的测试，使用
https://community.st.com/0D50X00009XkW1mSAF
第一个测试是正确检查从机地址确认。
然后测试读回WHO_AM_I寄存器
并记得读或写多个字节，必须设置子地址位7 ...
祝你好运！
注意：原始帖子包含大量线程对话，只能迁移到第9级
以上来自于谷歌翻译
以下为原文
Usually all digital pins are going to VDDIO and the internal analog front end portion uses the VDD.
If you need to test the chipset, make sure you have external pull-up resistors on VDDIO.
Shall you need simple test, use
https://community.st.com/0D50X00009XkW1mSAF
First test is to check the Slave address acknowledge properly.
Then test reading back the WHO_AM_I register
And remember to read or write multiple bytes, the sub address bit 7 must be set...
Good luck!
Note: the original post contained a large number of threaded conversations and was only able to be migrated to the 9th level
通常所有数字引脚都连接到VDDIO，内部模拟前端部分使用VDD。
如果需要测试芯片组，请确保在VDDIO上有外部上拉电阻。
你需要简单的测试，使用
https://community.st.com/0D50X00009XkW1mSAF
第一个测试是正确检查从机地址确认。
然后测试读回WHO_AM_I寄存器
并记得读或写多个字节，必须设置子地址位7 ...
祝你好运！
注意：原始帖子包含大量线程对话，只能迁移到第9级
以上来自于谷歌翻译
以下为原文
Usually all digital pins are going to VDDIO and the internal analog front end portion uses the VDD.
If you need to test the chipset, make sure you have external pull-up resistors on VDDIO.
Shall you need simple test, use
https://community.st.com/0D50X00009XkW1mSAF
First test is to check the Slave address acknowledge properly.
Then test reading back the WHO_AM_I register
And remember to read or write multiple bytes, the sub address bit 7 must be set...
Good luck!
Note: the original post contained a large number of threaded conversations and was only able to be migrated to the 9th level
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