Need sample code interfacing Altimeter and Arduino SPI

Comments

• John Abshier Posts: 1,116

  2012-05-14 14:31 edited 2012-05-14 14:31

  All of the demo code that I have seen is for I2C. Arduino I2C code is at https://sites.google.com/site/parallaxinretailstores/home/altimeter-module-ms5607
  
  John Abshier
• danidub Posts: 13

  2012-05-14 14:34 edited 2012-05-14 14:34

  John Abshier wrote: »

  All of the demo code that I have seen is for I2C. Arduino I2C code is at https://sites.google.com/site/parallaxinretailstores/home/altimeter-module-ms5607
  
  John Abshier

  
  Hi John, thank you! I have already seen the I2C code, but I need to communicate with SPI.
  Daniel P.
• Franklin Posts: 4,747

  2012-05-14 15:56 edited 2012-05-14 15:56

  What is it you are having trouble with? How are you connected and what code have you tried? are you sure you set the protocol line correctly?
• danidub Posts: 13

  2012-05-14 16:48 edited 2012-05-14 16:48

  Franklin wrote: »

  What is it you are having trouble with? How are you connected and what code have you tried? are you sure you set the protocol line correctly?

  Hello Franklin, the connection is ok, I follow the datasheet of the altimeter, but I have no code at all.
  Thank you,
  Daniel P.
• Franklin Posts: 4,747

  2012-05-14 19:58 edited 2012-05-14 19:58

  If you are looking for Arduino code I would recommend the arduino site. http://arduino.cc
• danidub Posts: 13

  2012-05-16 14:55 edited 2012-05-16 14:55

  Franklin wrote: »

  If you are looking for Arduino code I would recommend the arduino site. http://arduino.cc

  
  Thank you, but I have searched all over the internet and forums with no success for this module connected with SPI
• Franklin Posts: 4,747

  2012-05-16 22:06 edited 2012-05-16 22:06

  All you should need to do is send the text using SPI rather than I2C. It seems to be mostly ascii commands and returns.
• danidub Posts: 13

  2012-05-18 05:01 edited 2012-05-18 05:01

  Franklin, can you give me an idea of code for Arduino using SPI and this module (if you have some), I'm really new at this and sometimes it gets really complicated, or perhaps you can tell me the logic used in this communication for me to try some coding.
  Thank you,
  Daniel P.
• Franklin Posts: 4,747

  2012-05-18 11:06 edited 2012-05-18 11:06

  If you look at the intersemabaro.h file the places where there are Wire.write() lines are what needs to be sent to the baro and Wire.read() is where stuff is read from the baro.
• danidub Posts: 13

  2012-05-18 15:33 edited 2012-05-18 15:33

  Thank you Franklin! I'll try to code that! if succeed I'll post it here, have a nice day.
  Daniel P
• danidub Posts: 13

  2012-06-14 05:46 edited 2012-06-14 05:46

  Hello, and here again!
  I'm still trying and I made this code, that when a "0" is recieved in the serial, the arduino sends the conversion and read commands to the altimeter and stores the 24 bit data of the altitude. Till now, I get the data in three bytes, but for some reason I only get 3 bytes of 11111111, 11111111, 11111111.
  I post the code:
  

  /*
  Circuit:
   SCK: pin 13
   MISO: pin 12
   MOSI: pin 11
   SS: pin 9
   */
  
  
  const int ss = 9;
  #include <SPI.h>
  
  
  //3 bytes to get the 24 bit adc read
  byte byte1; 
  byte byte2; 
  byte byte3;
  
  
  void setup() {
    Serial.begin(9600);
  
  
    SPI.begin();
    SPI.setBitOrder(MSBFIRST);
  
  
    pinMode(ss, OUTPUT);
  }
  
  
  void loop() {
  
  
    if (Serial.available() > 0) {
  
  
      byte incomingByte = Serial.read();
  
  
      switch (incomingByte){
      case '0':
        read_alt();
        break;
      } //endswitch
  
  
    }//enif
  
  
  }//endloop
  
  
  void read_alt()
  {
    //READ Altimeter
    digitalWrite(ss, LOW);
    SPI.transfer(0x50); //ADC conversion command
    delay(1);
  
  
    // and store read data into three bytes
    byte1 = SPI.transfer(0x00);//ADC conversion read command, first 8 bits
    byte2 = SPI.transfer(0x00);//ADC conversion read command, second 8 bits
    byte3 = SPI.transfer(0x00);//ADC conversion read command, third 8 bits
  
  
    //print the 3 bytes in serial
    Serial.println(byte1, BIN);
    Serial.println(byte2, BIN);
    Serial.println(byte3, BIN);
    Serial.println();
  
  
    //release chip, signal end transfer
    digitalWrite(ss, HIGH); 
  }