write data to a register using wire library

leave the address empty for the master device code, and specify the address for the slave. Wire.begin() - Initiate the Wire library and join the I2C bus as a master or slave.

The main commads I’ll be using are the following: I will be using the Wire.h library to communicate between the boards using I2C. Stop conditions are defined by low to high transition on SDA after a LOW to high transition on SCL, with SCL remaining high. Stop condition: Once all the data frames have been sent, the master will generate a stop condition. Initial condition : master device sets SCL high and pulls SDA low.Īddress frame: 7-bit address, the address is clocked out most significant bit (MSB) first, followed by a R/W bit indicating whether this is a read (1) or write (0) operation and The 9th bit of the frame is the NACK/ACK bit.ĭata frame: after sending the address frame, the master continues generating clock pulses at regular intervals, and the data is transmitted by the SDA. Messages in I2C protocol are divided into frames: I2C supports multi-master, however, one master can communicate / send commands at a time (or else arbitration of the bus and clock synchronization is required). 100 KHz is the most supported speed by processors. I2C protocol can operate at different speeds, 100 KHz, 400 KHz and 3.4 MHz. I2C bus consists of two signals: SCL (clock signal) used for alinighg the data for sampling, and SDA (data signal) used to send the data.

I2C requires two wires to establish a connection, and can support up to 1008 slave devices. Inter intergrated circuit (I2C) is a multiple slave multiple master communication protocol. Implement and interpret networking protocols and/or communication protocolsįor this week, I am attempting to learn, implement and compare different communication protocols using the existing boards I have at hand, which basically are:Ī commercial Arduino UNO (with the kit), an Atmega 328 board (Fabduino), an Attiny 44 board (both of which I created in the Electronics design week), and a traffic signal board (with no processor) that we produced earlier this year in the winter camp!.Demonstrate workflows used in network design.design, build, and connect wired or wireless node(s) with network or bus addresses.Principles and practice Project management Computer aided design Computer controlled cutting Electronics production 3D scanning and printing Electronics design Computer controlled machining Embedded programming Input devices Applications and Implications Output devices Molding and casting Networking and communication Interface and application programming Mechanical design Wild card week Invention, intellectual property and income Project development WEEK 14: Networking and Communications Group assignment:

Write data to a register using wire library