Reading values from Energy IC Chip

[Paradigm]

Dear All Expert,

I am using a Arduino Uno board to capture some data of the energy IC chip connected using SPI. Following is the link to the datasheet of the ICs https://www.cirrus.com/en/pubs/proDatasheet/CS5464_F3.pdf

I had written the program and tested on the chip but it is not showing any different when I turn on my hair dryer which is connected to the energy IC. It shows the max value of 0xFFFFFF however, the max value on the datasheet is
7FFFFF. I suspect I didnt access the IC at all or didnt even communicate with the IC. Below is my code

#include <SPI.h>

int CS=9;
byte Data, Data1, Data2;
int MSB, LSB;
long Power;

void setup() {
  pinMode(CS, OUTPUT);
  Serial.begin(9600);
  SPI.setBitOrder(MSBFIRST);
  SPI.begin();
}

void CS5464_init() {
  digitalWrite(CS, LOW);
  //Initalise SYNC0 and SYNC1 with CS5464
  SPI.transfer(0xFF);
  SPI.transfer(0xFF);
  SPI.transfer(0xFF);
  SPI.transfer(0xFE);
  digitalWrite(CS,HIGH);
  delay(10);
  //Set to continous Conversion Mode
  digitalWrite(CS, LOW);
  SPI.transfer(0xE8);
  SPI.transfer(0xFF);
  SPI.transfer(0xFF);
  SPI.transfer(0xFE);
  digitalWrite(CS, HIGH);
  delay(10);  
}

void loop()
{
  CS5464_init();
  
  while(1) {
    Data = Data1 = Data2 = 0;
    
    digitalWrite(CS, LOW);
    SPI.transfer(0x08); //Read register 4 
    Data2 = SPI.transfer(0xFF); // SYNC1
    Data1 = SPI.transfer(0xFF); // SYNC1
    Data = SPI.transfer(0xFE); // SYNC0
    digitalWrite(CS, HIGH);
    
    MSB = 0x00FF & Data2;
    LSB = Data1 << 8;
    LSB = LSB | Data;
    Power = MSB << 16;
    Power = Power | LSB;
    
    Serial.print("Power of line =");
    Serial.print(Power, DEC);
    Serial.println('W');
    delay(1000);
  }
}

Can any expert here help me with my problem. Thanks a lot for your help

 

[internetuser2k12]

Can you post the circuit you are using?

 

[Paradigm]

Hi Internetuser2k12,

The hardware is working properly as I got it from some vendor that do energy IC chip. I do not have the circuit diagram. But the IC breakout board do have a Vin+ and Vin-, Vout+ and Vout- to be connected to my AC supply and output of my Load. Then it have a breakout of SDO, SDI, CS and SCLK which I connect to my Arduino Uno like this (CS to pin10 SS, SDO to pin 12 MISO, SDI to pin 11 MOSI, SCLK to pin 13 SCK). Does that help? Thanks a lot for your help.

 

[Paradigm]

Hi Internetuser2k12,

I sort of trace the PCB breakout board for my IC and the hardware looks something like the one attached. Pls advise. Thanks alot

 

[internetuser2k12]

Your connections are right. post your code. Are you sure that you are enabling CS/SS?

 

[Paradigm]

Hi Internetuser2k12, my code is on the first post. I didnt change my code after that. Still cannot get my IC to work. I connect the CS to pin 9 now. I didnt use pin 10 SS anymore as i will have more IC connected together. Sorry about the confusion. But still cannot get my code working.