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你好,
我已经阅读了LIS3MDL的数据表和应用笔记。但是我无法得到块数据更新位如何工作,即如果有人设置了BDU位并且我是否逐个通过I2C读取寄存器,那么ic内部如何知道已经读取了所有寄存器并获得了数据相同的样品? 任何人都可以详细说明ODR及其在LIS3MDL中的工作 以上来自于谷歌翻译 以下为原文 hello, I have gone through the datasheet and app note of LIS3MDL. But i am not able to get how block data update bit work i.e. if someone has set the BDU bit and if I read registers through I2C one by one, then how the ic internally gets idea that all the registers have been read and got the data of same sample? Also can anyone please elaborate about ODR and its working in LIS3MDL |
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11个回答
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你好,
请查看此应用说明,可从产品网页获得: http://www.st.com/content/ccc/resource/technical/document/application_note/69/d7/05/fe/a9/3e/4b/ea/DM00136626.pdf/files/DM00136626.pdf/jcr:内容/翻译/ en.DM00136626.pdf 。部分解释了BDU.Oso ODR是输出数据速率,您可以多久获得一次更新结果。它以Hz为单位声明,即每秒采样数。 大卫 以上来自于谷歌翻译 以下为原文 Hello, Have a look at this application note, available from product webpage: http://www.st.com/content/ccc/resource/technical/document/application_note/69/d7/05/fe/a9/3e/4b/ea/DM00136626.pdf/files/DM00136626.pdf/jcr:content/translations/en.DM00136626.pdf . Section explains the BDU.Also ODR is output data rate, how often you can get an updated results. It is declared in Hz, meaning samples per second. David |
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大卫你好,
感谢您的回复。 但我仍然没有充分了解ODR。所以我只想向你证实,我的理解是对不对的答案。 所以我所理解的是,通过设置ODR = 80Hz,我们的输出寄存器将每12.5ms(1/80)更新一次。这样对吗? 以上来自于谷歌翻译 以下为原文 Hello David, Thanks for your reply. But still i am not getting full idea about ODR. So i just want to confirm from you that my understanding is right or not from your answer. So what i have understood is, by setting ODR=80Hz, our output registers will be updated every 12.5ms(1/80). Is it right? |
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你好,
如果我将满量程设置为+ -4高斯,那么我们可以测量大于4高斯且小于-4高斯的磁场吗? 我无法理解LIS3MDL数据表中的FullScale参数。那么请你帮我理解一下 以上来自于谷歌翻译 以下为原文 Hello, if i set full scale to +-4 gauss, then can we measure the magnetic field greater then 4 gauss and lesser then -4 gauss? I am not able to understand FullScale parameter from datasheet of LIS3MDL. So can you please help me to understand it |
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您好,请看数据表中的机械特性部分。每个标度具有每LSB定义的灵敏度。读取输出寄存器后,将该值乘以灵敏度,您可以读取mg单位。
以上来自于谷歌翻译 以下为原文 Hello, have a look at section Mechanical characteristics in the datasheet. Each scale has a defined sensitivity per LSB. After you read the output registers, multiply the value by the sensitivity and you get you reading in mg units. |
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大卫你好,
感谢您的回复。 其实我知道那件事,但我想知道,做全尺度定义测量范围?这意味着在满量程中设置+ -4高斯,我们可以测量超过4高斯的磁场吗? 以上来自于谷歌翻译 以下为原文 Hello David, Thanks for your reply. Actually I know that thing ,but i want to know that, do full scale define measurement range? which means setting +-4 Gauss in Full Scale, can we measure the magnetic field beyond 4 gauss? |
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是的,满量程基本上是测量范围。例如,对于满量程+ -4高斯,您可以测量从-4高斯到+4高斯的磁场。
即使高于4高斯(或低于-4高斯)的值可以适合输出寄存器的范围,也不能保证功能和性能。 以上来自于谷歌翻译 以下为原文 Yes, full scale is basically measurement range. For example for Full Scale +-4 Gauss you can measure magnetic field from -4 Gauss to +4 Gauss. Even if values higher than 4 Gauss (or lower than -4 Gauss) can fit in the output register's range the functionality and performance is not guaranteed. |
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你好Miroslav,
感谢您的答复。它彻底清除了我的怀疑。 我要确认的另一件事是,如果我在OFFSET寄存器中设置了一些值,它是否在内部减去OFFSET值并将输出写入OUT寄存器,或者我们必须手动完成。 以上来自于谷歌翻译 以下为原文 Hi Miroslav, Thank you for your response. It cleared my doubt fully. Another thing that i want to confirm is, if i set some value in OFFSET registers, does it internally subtract the OFFSET values and writes the output in OUT registers, or we have to do it manually. |
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请参阅AN4602的以下章节。 OFFSET会自动减去。
以上来自于谷歌翻译 以下为原文 Please see following chapter from AN4602. The OFFSET is automatically subtracted. |
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感谢Miroslav的支持。
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 Thanks Miroslav for your support. 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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