Run 2 i2r devices on a Deamilanove similtaneously?

Using Arduino Project Guidance
1

I thinking of a project where I'll need a Wifi shield and a LCD shield both running together. Is this possible and if so, how?

Jim

2

What is i2r?
I2c, spi, serial?

3

Senso:
What is i2r?
I2c, spi, serial?

of course I meant i2c, sorry.

Jim

4

I2C is designed for chaining - just connect both devices to the SDA and SCK lines, and make sure they have nonconflicting addresses.

5

Aeturnalus:
I2C is designed for chaining - just connect both devices to the SDA and SCK lines, and make sure they have nonconflicting addresses.

Thanks for the reply! How does the Arduino specify the device address? I assume that means I could stack I2C shields by just giving them different addresses.

Jim

6

The wiring.h library is used for I2C. Your program will contain the device address and the data you are sending it.

7

Here's the correct thing to call out, I was a little off:

#include <Wire.h>  // bring in Wire Library

//Then you can set up some addresses to use, these are for MAX6953 for example:

//  I2C device address is 1 0 1   A3 A2 A1 A0  with AD1, AD0 both low
#define COMMAND_ADDRESS (0x50);
#define CONFIG_ADDRESS (0x04);
#define INTENSITY10_ADDRESS (0x01);
#define INTENSITY32_ADDRESS (0x02);
#define SCANLIMIT_ADDRESS (0x03);
#define DIGIT0_ADDRESS (0x60);
#define DIGIT1_ADDRESS (0x61);
#define DIGIT2_ADDRESS (0x62);
#define DIGIT3_ADDRESS (0x63);

and send a command, I did this in Setup to get ready for Loop:

void setup() {
  // start up I2C, uses Analog 5 for Clock, Analog 4 for data
  Wire.begin(); // nothing in () because we are the master
/*  Need this stuff now??  Try with & without, Wire.h & Wire.begin might do it for you:

  // define stuff to use for ShiftOut
  // SCL, SDA, BLINK

  //set pins to output so you can control the shift register
  pinMode(Blink, INPUT); // Blink
  pinMode(clockPin, OUTPUT); // SCL
  pinMode(dataPin, OUTPUT);  // SDA
*/

  //  Send config register address
  
  Wire.beginTransmission(address);
  Wire.send(COMMAND_ADDRESS); 
  Wire.send(CONFIG_ADDRESS);

  //  Connect to device and the byte
  Wire.send(0x01);  //  low byte

  Wire.endTransmission();