You'll need to copy the Relay16 directory (with the Relay16.cpp and Relay16.h files) into your arduino/libraries directory. The 6P6C connectors on the board implement the standard Iowa Scaled Engineering 6P6C I2C connector pinout, making it directly compatible with a wide variety of shields we offer with an I2C port. If the /IORST is left floating, the board will hold itself in a permanent reset state and do nothing. Optionally, the /IORST (inverted IO reset) line can be connected to a digital I/O pin or just connected to +3.3V or +5V. The board itself needs to be connected to the SCL and SDA lines coming out of the Arduino, as well as ground. The Relay16 library was designed to make the Iowa Scaled Engineering I2C-RELAY16 control board easy to use with the Arduino TM environment. Start > 7-bit S/A > W > 8-bit Register address > Repeated start > 7-bit S/A > R.I2C-RELAY16 Library Reference Introduction The datasheet doesn't provide the I2C format for reading registers just slave addresses, but I found documentation for other TI devices that cite this format. I feel the issue has to do with how I am telling the arduino to access the register address. Returns '0' on succesful write- but in this case it keeps returning a '2' meaning it cannot locate the address I am trying to point to.
Serial.println(Wire.endTransmission(false)) // sends START BIT > 7-bit Slave address > Write bit > 8-bit Register Address > Repeated Start Bit Wire.write(regadd) // Queues WRITE bit > Register Address (PGA1) Wire.beginTransmission(address) // Queues START bit > 7-bit Slave Address (0x94) Wire.begin() // intitalizes Ardiuno as a I2C device #include //Library that allows I2C communicationīyte address = 0x94 //confirmed with Purepath softwareīyte regadd = 0x01 // Register address for PGA1 Here is some short code I have written to read the gain value stored in the PGA1 register. I can update/read register values all day within the purepath software, but I cannot accomplish this using the Arduino. To accomplish this, I am using an Arduino UNO and the Wire library (simple I2C library). I am working on a project that requires me to read/update various register values of the PCM1865 via I2C.
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