请问PIC24FJ128GC010与AMS AS5055A磁力旋转编码器怎么进行SPI通信

示意图？



      以下为原文

    Schematic?

PIC与模拟输入共用的数据输入引脚吗？如果是，你把它转换成数字模式了吗？



      以下为原文

    Is the data input pin on that PIC shared with an analog input?
If yes, have you switched it to digital mode?
 

其中明显的一种是投入产出和投入产出。一些命名约定在主输出、从输入对和主输入都使用相同的名称，而从输出则使用不同的名称。如果使用有点碰撞的SPI，则应该能够单步使用DVM测量信号。当然，一个范围使事情变得容易很多。/ Ruben



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    The obvious one: Input to output and output to input. Some naming conventions use the same name at both the master output, slave input pair and the master input, slave output while other have different names.
 
If you use a bit banged SPI you should be able to single step and measure the signals with a DVM. Of course, a scope makes things a lot easier.
 
/Ruben

一些想法：在POST 6中的代码似乎将SS控制到SPI1，因此它确定信号何时被断言。当你说“...我只是编写一个程序，简单地打开和关闭它…”你还在运行你的SPI初始化代码（与PPS设置为SS1OUT）？-send_command()函数似乎想通过LATB2控制它，但是初始化似乎又想将其置于SPI1的控制之下。-我怀疑SPIFE需要设置。-如果我正确地读取它，AMS数据表表明设备的/INT信号被用来调整SPI交换的速度。e s（即，除非/INT被断言，否则不应该发起任何交换）。-我建议基于AMS数据表中记录的交互wi发布一个最小的、完整的程序，尝试做一些非常简单的事情（例如，读取ID寄存器或者会给您提供非零、非FF数据的事情）。这个装置。设置你的逻辑分析仪来捕获/INT，SS，时钟和数据信号。发布一个图片，当你运行程序时会发生什么。（您可能无法直接发布图片，但是其他新用户已经采用了一些解决办法。）使用简单明了、定义良好的内容可能会在这里获得更多的帮助。



      以下为原文

    Some thoughts:
 
- The code in post 6 seems to give control of SS to SPI1, so it determines when the signals will be asserted.  When you say "...I just write a program that simply turns it on and off..." are you still running your SPI initialization code (with the PPS set to SS1OUT)?
 
- Your send_command() function seems to want to control it via LATB2 but again the initialization seems to want to put it under control of SPI1.
 
- I suspect SPIFE needs to be set.
 
- If I'm reading it correctly, the AMS data sheet indicates that the device's /INT signal is used to pace the SPI exchanges (i.e., you shouldn't initiate any exchange unless /INT is asserted).
 
- I'd suggest posting a minimal, complete program that attempts to do something very simple (e.g., read the ID register or something that'll give you non-zero, non-FF data) based on the AMS data sheet's documented interaction with the device.  Set up your logic analyzer to capture /INT, /SS, the clock, and data signals.  Post a picture of what happens when you run the program.  (You may not be able to post pictures directly but there are workarounds that other new users have employed.)  Working with something straightforward and well-defined will probably get you more help here.