SPI COMMUNICATION ON ARDUINO PLEASE HELP

[StudentFR]

Hi guys;
I need your help. I am new to using Arduino, but I want to receive data from the RM3100 sensor. I have examined the SPI example code. The sensor supports the SPI protocol, but even though it has an algorithm, I could not write the code. Please help me.

The link to the datasheet of the sensor I mentioned: ДКО Электронщик - все для работы и хобби электронщика на electronshik.ru

Also there is an SPI algorithm in SPI Example part of datasheet. (Page 37)

My code is attached.
But I can't see normal values. I always see (33).

coded.ino (944 Bytes)

[Robin2]

Can you post the code from the datasheet example?

...R

[StudentFR]

There is a SPI communication example like an algorithm. I share with you.

[Robin2]

If the images in Reply #2 are pictures of text, then that is little use. Post the code as text - perhaps in a ,ino file.

If the images are something else then please display them in your post so we can see them without downloading them. See this Simple Image Guide

...R

[StudentFR]

2.

3.

[Robin2]

I can't immediately see anything wrong with your code but i am not good at spotting things and I don't have your hardware to experiment with.

What values get returned when you do the initial SPI.transfer()s to set the cycle count register (whatever that is).

When it says set SSN high followed by low there is probably a minimum time for the HIGH - are you complying with that?

...R

[StudentFR]

I do not know exactly what kind of response I will get after doing the "Cycle Count Register".

However, there is a statement in Datasheet.

"The Cycle Count Registers establish the number of sensor oscillation cycles (cycle counts) that will be counted for each sensor in both the forward and reverse bias directions during a measurement sequence. Each sensor has its own cycle count value, and each can be different. Increasing the cycle count value increases measurement gain and resolution. Lowering the cycle count value reduces acquisition time, which increases maximum achievable sample rate or, with a fixed sample rate, decreases power consumption. The Cycle Count read and write addresses, plus their default values. "

Also, as you said, the SSN pin must stay at least 1 ns HIGH. I will follow this.

[Robin2]

If it only needs a HIGH of 1ns then your code will be fine. An Arduino can't do anything that fast.

In this code

  digitalWrite(CS,HIGH); //set cycle count register
  digitalWrite(CS,LOW);
  SPI.transfer(0x04);
  SPI.transfer(0x00);
  SPI.transfer(0x64);
   // etc

you are ignoring the returned values. Capture them and see what they are.

...R

[YerbabiE]

I'm running the older MicroMag3, and thinking of getting this new model to combine with a D1 mini, My Pref is to use the I2C method, have you considered this?, the SPI method is a bit clunky and more connectors?

Are you able to share the connection method, pin for pin etc, this may help.

-B