I☬ is a multi-master system, meaning you can have more than one master controlling data being sent on the bus. Every signal line has an internal pull-up resistor that drive the line back to high when a device is using it. This means that they are only able to pull the line low, eliminating the risk of bus contention which can damage components. The slave devices will sample a bit from the data stream in synchronization with this signal.ĭevices that use I☬ are “open drain” on the data signal. A clock signal (SCL) – This is purely for regulating the speed the data is sent.Everything is sent on this signal and can be sent anywhere on the bus. Data signal (SDA) – This is where all of our control information and data is sent/received.I☬ uses 2 signals for transferring data between devices, this halves the SPI’s 4 wire communication protocol.
Does the arduino wire library use interrupts serial#
In the past we have investigated the SPI and Asynchronous Serial Communications protocols for this purpose, check them out before we delve into the new topic of I☬ communications.
I☬ stands for the inter-integrated circuit and refers to a communication protocol we are going to use to communicate between our Arduino devices.
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