[问答]

怎么使用PIC从SPI ADC读取数据到PC

问答对人有帮助，内容完整，我也想知道答案 0 你好，我想把AD77 68的输出数据读入PC机，然后使用SCILAB中的数据。我需要相当高的数据速率（8个信号，每个样本有256个KB，每个样本有4个字节）。ADC的输出是具有2条数据线的SPI和32 MHz的SPI时钟或8条数据线和8MHz的时钟。ADC是SPI主机，是连续发送数据的。我已经把SPI看做像FTTDI芯片和其他厂商的USB桥接器，但是它们不能满足数据速率，有些还需要字节字节之前的地址字节。因为我是一个完整的PIC处女，如果有人合作，我会很高兴。ULD给我一个已经满足我的需求的项目，或者至少需要一些小的修改。如果我需要的不是PIC，那么这样的信息也会有帮助，所以我不会浪费太多的时间自己去发现。提前感谢格尔德。以上来自于百度翻译以下为原文 Hi, I want to read the output data from an AD7768 into a PC and then use the data within SCILAB. I need quite a high data rate (8 signals with 256 kSamples each at 4 bytes per sample). The output of the ADC is SPI with 2 data lines and the SPI clock at 32MHz or with 8 data lines and the clock at 8MHz. The ADC is the SPI master and is sending data continously. I have looked after SPI to USB bridges like FTDI-chips and ones from other vendors but they would not meet the data rate and some also need address bytes before the data bytes. As I am a complete PIC virgin, I would be delighted if someone could point me to a project that would already meet my needs or at least need only minor modifications. If what I need is not possibe with a PIC then such info would also be helpful , so I wouldn't waste too much time finding out by myself. Many thanks in advance, Gerd 0
2019-3-25 10:26:46　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × qun333 该类别下有 57 个回答。邀请回答 caoguiqun 该类别下有 56 个回答。邀请回答技术发广告该类别下有 56 个回答。邀请回答 psw30 该类别下有 44 个回答。邀请回答伊丹姿子该类别下有 41 个回答。邀请回答 uwufwjrw 该类别下有 39 个回答。邀请回答 hetao1111 该类别下有 38 个回答。邀请回答 lc123617 该类别下有 35 个回答。邀请回答欧阳大大该类别下有 32 个回答。邀请回答作死不止该类别下有 31 个回答。邀请回答 asd010 该类别下有 31 个回答。邀请回答 60user92 该类别下有 29 个回答。邀请回答 wy8719 该类别下有 29 个回答。邀请回答嘻嘻爱哈哈该类别下有 28 个回答。邀请回答 haikitty 该类别下有 28 个回答。邀请回答 ju978779 该类别下有 28 个回答。邀请回答 xiuzhen122 该类别下有 27 个回答。邀请回答 pol666 该类别下有 27 个回答。邀请回答 ueywyrsdfs 该类别下有 26 个回答。邀请回答 lhly23 该类别下有 25 个回答。邀请回答举报李雨晨相关推荐 • 将STM32 MCU与外部ADC连接并通过SPI读取数据 15711 • 429的SPI读取外部ADC数据，SPI该怎么配置？ 2869 • 两个微控制器之间的UART和SPI通信如何从主从数据写入SPI 3187 • 想用FGPA通过SPI协议读取ADC数据，有没有例程啊？ 6659 • 在PIC18LF45K22微控制器上将USART和SPI结合在一起 1519 • PIC32采用单时钟多数据输出SPI器件可行吗 1890 • 为什么使用PIC16F1713而ADC的问题是降低了8位数据 1427 • AM3354通过SPI1与STM32F427的SPI2通信，数据乱码/不正常 2865 • 如何找到关于SPI软件实现的参考？ 1941 • 为什么不将ADC与SPI都置于从机模式呢？ 233 2个回答

答案对人有帮助，有参考价值 0 我已经看到了一些关于音频采样的线索，它们是几年前的，但据我所知，在48千赫的情况下采样两个音频数据是一个艰难的过程。也许你应该寻找一个更快的32位PIC或类似的。以上来自于百度翻译以下为原文 I have seen a few threads that were talking about audio sampling, they were a few years old but as far as I could tell it was a struggle to sample two channels of audio data at 48kHz. Maybe you should be looking into a faster 32 bit PIC or similar.

2019-3-25 10:45:24 评论举报王蓓

答案对人有帮助，有参考价值 0 我不记得任何PIC设备处理硬件中的双或四个SPI接口-也许一些新的设备做，但你需要检查微芯片产品选择页面。只要你离开接口到硬件（即不要尝试敲击界面本身）和每HAPS使用DMA，你不应该有任何问题的高（ISH）传输速率。然而，我怀疑试图让PIC在8毫秒/秒中读取数据，然后处理USB接口（或者甚至通过UART）可能会推动它。这将等于UMAR.苏珊的大约64 Mb/s吞吐量或非常高的波特率。以上来自于百度翻译以下为原文 I don't remember any PIC device that handles dual or quad SPI interfaces in hardware - perhaps some of the newer devices do but you wold need to check the Microchip product selection pages. As long as you leave the interface to the hardware (i.e. don't try to bit-bang the interface yourself) and perhaps use DMA, you should not have any problems with high(ish) transfer rates. However I suspect that trying to get a PIC to read in data at 8 MSamples/Sec and then also handle a USB interface (or even through a UART) might be pushing it. That would equate to about 64mBit/Sec throughput or a very high BAUD rate for the UART. Susan

2019-3-25 10:57:32 评论举报薄坤坤