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您好ALLI有一个关于SD卡接口的问题,我使用PIC32 MZ2048 EFHH应该是SD卡的最大尺寸,我可以与我的控制器接口,我的意思是SD卡与控制器接口的容量取决于哪些参数?????
以上来自于百度翻译 以下为原文 hello all i have one Question about SD card Interfacing I use PIC32MZ2048EFH what should be the maximum size of SD card that i can interface with my controller, i mean size capacity of SD card that interface with controller is depends on which parameters ???? |
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14个回答
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SD卡的最大尺寸是2GB。任何较大的,它将是SDHC卡,这是不同的。
以上来自于百度翻译 以下为原文 The maximum size of an SD card is 2GB. Any bigger, and it will be an SDHC card, which is different. |
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谢谢您的回复,但假设我有一个系统,接口SD卡,但我不知道内存的最大容量,可以处理微控制器16GB 32 GB或64 GB。如果我接口64 GB,它会工作吗??
以上来自于百度翻译 以下为原文 thank you for your reply but suppose i have one system ,interface sd card but i dont know the maximum capacity of memory that can handle by micro-controller 16gb 32 gb or 64gb. if i interface 64gb it ll work or not?? |
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卡的容量与PIC的内存无关。当我刚刚告诉你最大可能的SD卡是2GB时,为什么要提到16/32/64 GB?你的意思是SDHC卡吗?如果你不知道区别,你应该学习.HTTPS://E.WiKiTo.Org/Wiki/SeCurrId数字
以上来自于百度翻译 以下为原文 The capacity of the card has nothing to do with the memory of the PIC. Why are you mentioning 16/32/64GB when I just told you the largest possible SD card is 2GB? Do you really mean SDHC cards? If you don't know the difference, you should learn. https://en.wikipedia.org/wiki/Secure_Digital |
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如果你的软件支持SDHC,那么你应该能够处理最大的SDHC大小,它是32GB。你需要SDXC软件来访问大于32GB的卡。
以上来自于百度翻译 以下为原文 If your software supports SDHC, then you should be able to handle up to the maximum SDHC size, which is 32GB. You will need SDXC software to access cards larger than 32GB. |
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好的,先生,但是从某种意义上讲,软件是什么?我使用PIC32MZ EF系列它会支持更多的32GB吗??
以上来自于百度翻译 以下为原文 ok sir but software in the sense ? i use PIC32MZ EF series will it support more then 32GB?? |
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你真的意识到你不能把SDHC卡连接到你的PIC上,直接访问它上的内存吗?你需要编写固件来访问SDHC卡,或者包括一个像和声这样的库。你真的应该学习SD/SDHC卡是如何工作的,这样你就不会问毫无意义的问题。
以上来自于百度翻译 以下为原文 You do realise that you can't just connect an SDHC card up to your PIC and directly access the memory on it? You need to write firmware to access an SDHC card, or include a library like Harmony. You really should learn how SD/SDHC cards work so you don't ask questions that make no sense. |
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这是有意义的,你不能理解我的问题,我只是问我们需要知道哪些参数来扩展控制器可以处理的容量,但离开它你不能解决我的查询。我们有电话支持多达32 GB的SD卡(SDHC),为什么它是可扩展到32.哪些参数决定这一点,这是我的问题
以上来自于百度翻译 以下为原文 it make sense ,you can't understand my question i just asked which parameters we need to know to expand the capacity that controller can handle ,but leave it you cant solve my query. we have phone that support up to 32 gb of sd Card(sdhc) why it is expandable up to 32.which parameters decide this , this is my question |
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你问的是愚蠢的问题。如果一个设备的固件支持SDHC标准,那么它可以访问到SDHC支持的最大大小的卡,它是32GB。大小是由卡片的容量决定的,这就像问“你能读的最长的书是什么”。你只要继续读下去,直到结束。
以上来自于百度翻译 以下为原文 You are asking silly questions. If a device's firmware supports the SDHC standard, then it can access cards up to the maximum size supported by SDHC, which is 32GB. The size is determined by the capacity of the card. This is like asking "what is the longest book you can read". You just keep on reading until you get to the end. |
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这就是我要问的,我们如何在固件中决定,我的意思是,在哪一个基础上,我有能力读这本书500页,我不能读1000页的书,但是如果我想读1000页,那么我应该做什么,它将发生在基础上,让我的心读那本书,通过我的思想转移到R。每个人都不是专家,像你一样,你给予,但不是以适当的方式。
以上来自于百度翻译 以下为原文 this what i am asking how can we decide in firmware i mean in which basis, i have capacity to read the book with 500 pages ,i cant read book with 1000 pages but if i want to read 1000 pages then what should i do ,it ll happen on the basis to make my mind to read that book,by conveyancing my mind to read the book. everyone is not expert like you you give ans but not in proper way. |
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SD卡是块寻址,所以你可以限制的数量块可以解决。网上有很多SD卡访问教程,它将帮助你理解基础知识。
以上来自于百度翻译 以下为原文 SD cards are block-addressed, so you're limited by the number of blocks you can address. There's a number of SD card access tutorials on the net that will help you understand the basics. |
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让我看看我能否解释硬件,所有SD卡都使用PIC32和卡之间的SPI连接。软件方面,你需要一个固件库来访问你程序中SD卡上的文件。卡的容量取决于你使用的库。一个流行的第三方库iStTp://elm han.Org/FSW/FF/00索引X.HTML.但是还有一个支持SD卡的和声库。大多数库支持DOS FAT16和FAT 32文件系统。卡容量取决于库支持的文件系统。SD CARDSD标准有三种类型:使用FAT 12和16文件系统SDHC标准的2GB SD存储卡-使用FAT32文件系统SDXC标准的2GB-32 GB SDHC存储卡-使用ExFAT文件系统的32 GB-2TB SDXC存储卡,这样您就可以看到您只选择支持的库。FAT16和FAT32文件系统,最大卡大小是32GB。通常库不支持ExFAT文件系统,因为它是微软专有格式,并且需要使用版税。
以上来自于百度翻译 以下为原文 Let me see if I can explain it Hardware wise, all SD cards use an SPI connection between the PIC32 and the card. Software wise, you need a firmware library to access the files on an SD card in your program. The capacity of card supported depends on the library you use. A popular 3rd party library is http://elm-chan.org/fsw/ff/00index_e.html but there is also a harmony library that supports SD cards. Most libraries support the DOS FAT16 and FAT 32 file systems. The card capacity depends on the file system supported by the library. There are three types of SD cards SD standard - Up to 2GB SD memory card using FAT 12 and 16 file systems SDHC standard - over 2GB-32GB SDHC memory card using FAT32 file system SDXC standard - over 32GB-2TB SDXC memory card using exFAT file system So you can see if the library you select only supports FAT16 and FAT32 file system, the maximum card size is 32GB. Typically the libraries do not support the exFAT file system, since it is a Microsoft proprietary format, and requires royalty fees for use. |
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我明白了这一点,我完全理解,非常感谢。
以上来自于百度翻译 以下为原文 @malaugh i get this point ,i understand completely Thanks a lot sir |
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…PIC32 MZ(EF或DA)硬件接口只是控制固件下的传输,可以处理固件支持的任何尺寸的卡,对吗?什么是和谐2.04或2.05司机固有的局限性?(队列中的下一个项目)
以上来自于百度翻译 以下为原文 ... and a PIC32MZ (EF or DA) hardware interface just controls transport under the firmware and can handle whatever size card the firmware supports, correct? What are the limitations inherent to Harmony 2.04 or 2.05 drivers? (next project in the queue) |
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