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希望使用ST NFC读取器模块读取标签,读卡器必须能够发送未调制的信号(载波仅在13.56MHz)。我还需要能够在评估模块的其中一个引脚上看到解调信号。有没有可用的模块?我目前正在使用EVAL-ST95HF,但遗憾的是无法在电路板上的任何位置看到解调信号。对此的任何意见都非常感谢。
以上来自于谷歌翻译 以下为原文 Looking to use ST NFC reader module for reading the tags and the reader must be able to send an unmodulated signal (carrier only at 13.56MHz). I also need to able to see the demodulated signal at one of the pins on the evaluation module. Is there any module that is available ? I am currently using EVAL-ST95HF but unfortunately not able to see the demodulated signal anywhere on the board. Any input on this is much appreciated. |
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7个回答
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嗨Preetha,
ST95接收的所有数据在芯片内部解调和解码后放入缓冲区,可通过UART / SPI读取。 CR95和ST95并不打算用作纯模拟前端。 问候,尤利西斯 以上来自于谷歌翻译 以下为原文 Hi Preetha, All data the ST95 receives is put after chip-internal demodulation and decoding into buffers where it can be read via UART/SPI. The CR95 and ST95 are not meant to be used as pure analog frontends. Regards, Ulysses |
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你好
尤利西斯 你能推荐一个我可以用的读卡器模块吗? 谢谢, Preetha 以上来自于谷歌翻译 以下为原文 Hi Ulysses, Can you suggest a reader module which I could use? Thanks, Preetha |
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嗨Preetha,
ST25R3911B可以做到这一点:它有一个所谓的透明模式,你可以改变SPI引脚的作用来输出数字化的解调信号/接收数字调制信号。也许这就是你要找的东西。如果您可以提供更多关于您实际想要实现的信息,我可以为您提供更详细的信息。 问候,尤利西斯 以上来自于谷歌翻译 以下为原文 Hi Preetha, ST25R3911B can do this: It has a so called transparent mode where you can change the role of the SPI pins to output digitized demodulated signal / receive digital modulation signal. Maybe this is what you are looking for. If you can provide some more infos on what you actually would like to achieve I may be able to give you more elaborated information. Regards, Ulysses |
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嗨尤利西斯,
谢谢你的建议。我希望编程模块只发送载波信号(13.56 MHz)并关闭调制。我可以使用为此模块提供的PC软件吗? 谢谢, Preetha 以上来自于谷歌翻译 以下为原文 Hi Ulysses, Thanks for the suggestion. I am looking to program the module to send just the carrier signal (13.56 MHz) and turn off the modulation. Can I do that using the PC software provided for this module? Thanks, Preetha |
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嗨Preetha,
当然是。只需在寄存器映射中翻转一下,或按ST25R3911B-DISCO GUI中的各种“配置”按钮即可。然而,在该GUI中没有预见到透明模式的控制以看到解调模式。根据您实际想要接收的内容,选项也可能是所谓的观察模式。 但是,这两个选项都需要为预期的接收模式预先设置模拟参数,以获得最佳性能。 仍然没有得到你的大局。 问候,尤利西斯 以上来自于谷歌翻译 以下为原文 Hi Preetha, yes, of course. It is a mere flip of a bit in the register map or you press one of the various 'Configuration' buttons in the ST25R3911B-DISCO GUI. However control of the Transparent mode to see demodulated pattern is not foreseen in this GUI. Depending on what you actually want to receive an option may also be the so-called observation modes. However both options require pre-setting analog params for the expected received patterns for best performance. Still don't get your big picture. Regards, Ulysses |
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嗨尤利西斯,
感谢您的回复。我现在正尝试通过使用PC软件Disco套件将操作控制寄存器配置为0x88(En OSC和en TX)来配置ST25R3911B来发送载波。我能够看到解调,但无法找到如何转换它以查看脉冲消耗数字化输出。这方面的任何线索都会有所帮助。 谢谢, Preetha 以上来自于谷歌翻译 以下为原文 Hi Ulysses, Thanks for your reply. I am now trying to configure the ST25R3911B to send the carrier by configuring the Operation Control Register to 0x88 (En OSC and en TX) using the PC software Disco kit. I am able to see a demodulation but not able to find how to transform it to see a pulse drain digitised output. Any leads on this would be helpful. Thanks, Preetha |
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嗨Preetha,
正如我已经告诉过你的那样:迪斯科舞厅不支持透明模式。它可以发送0xdc命令,但只能在该模式下离开芯片一小段时间,直到它再次驱动/ SS为高电平。如果你想使用它,那么你必须编写自己的FW。 再一次:根据您实际想要接收的内容,选项也可能是CSI / CSO上的所谓观察模式。 如果您可以提供更多关于您实际想要实现的信息,我可以为您提供更详细的信息。 问候,尤利西斯 以上来自于谷歌翻译 以下为原文 Hi Preetha, As I have already told you: the disco does not have support for the transparent mode. It can send the 0xdc command but that leaves the chip only for a very small moment in that mode until it drives /SS high again. If you want to use that then you have to write your own FW. Once more: Depending on what you actually want to receive an option may also be the so-called observation modes on CSI/CSO. If you can provide some more infos on what you actually would like to achieve I may be able to give you more elaborated information. Regards, Ulysses |
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