Hello everyone,

My name is Kirtan Soni and I am trying to interface the infineon's KP253 pressure sensor with the arduino mega. So far I have been able to get the output readings from the sensor (not what I need) and I think that I am using the correct SPI protocol as per give data sheet.

I am getting a diag1 error (As per datasheet) in my readings. I will explain what I did in depth below:

This is my circuit diagram. According to the datasheet the KP253 has a 16bit SPI transfer register the protocol is MSB first, 0.1 - 5 MHz clock speed, model 1. I have used the SPI.transfer16() to read and write to the register of the sensor, I am getting the readings and the readings are also changing with the rise and drop of temperature.

To check whether my connection and program is right I also write the identifier code and it gives me proper response as indicated in the datasheet.

This is the output I get by converting it to binary, I get - 0101000100110111 which is correct.

But when I write the temperature read command it gives me - 0101001011000110

So according to the response structure I get Diag1 error - 010

Here is my code:

#include<SPI.h> //Library for SPI

const int CS=4;
volatile int Response;

void setup (void)
{
Serial.begin(115200);
pinMode(CS,OUTPUT);
digitalWrite(CS,HIGH);
}

void loop(void)
{
digitalWrite(CS,LOW);
SPI.begin();
SPI.beginTransaction(SPISettings(4000000, MSBFIRST, SPI_MODE1));
Response = SPI.transfer16(0b0100000000000000);
SPI.end();
digitalWrite(CS,HIGH);
Serial.println(Response);
}

I tried everything that I knew but I don't know what am I doing wrong?
Thank you for your time.

 I really appreciate your efforts.
To make your efforts a bit easy I am attaching the link to the datasheet as well.

https://www.infineon.com/dgdl/Infineon-KP253-DS-v01_01-EN.pdf?fileId=5546d46254e133b40155731edd7563da

Hello,

when using this sensor, the communication between the microcomputer and the sensor cannot be realized, can you provide a solution?

Thank you，

Zhang