I2c platform driver

1. What is the I2C driver?
2. Why I2C driver is used?
3. How do I know if my device is I2C?
4. How I2C driver works in Linux?
5. What does I2C stand for?
6. What is I2C and how it works?
7. What is I2C frame format?
8. How do I scan an I2C address?
9. What is bus driver in Linux?
10. How probe function is called in Linux?

What is the I2C driver?

The I2CDriver is an easy-to-use, open source tool for controlling I2C devices. It works with Windows, Mac, and Linux, and has a built-in colour screen that shows a live “dashboard” of all the I2C activity. It uses a standard FTDI USB serial chip to talk to the PC, so no special drivers need to be installed.

Why I2C driver is used?

This month, we discuss what the I2C subsystem does and how to write a driver for it. I2C is the name for a two-wire serial bus protocol originally developed by Phillips. It commonly is used in embedded systems so different components can communicate; PC motherboards use I2C to talk to different sensor chips.

How do I know if my device is I2C?

The I2C device driver must implement the detect() method, which identifies a supported device by reading from arbitrary registers. Only buses which are likely to have a supported device and agree to be probed, will be probed. For example this avoids probing for hardware monitoring chips on a TV adapter.

How I2C driver works in Linux?

I2C device drivers using this binding model work just like any other kind of driver in Linux: they provide a probe() method to bind to those devices, and a remove() method to unbind. static int foo_probe(struct i2c_client *client, const struct i2c_device_id *id); static int foo_remove(struct i2c_client *client);

What does I2C stand for?

So, what exactly is I2C? Inter-Integrated Circuit – that's what I2C stands for. The I2C protocol is used to establish communication between two or more ICs (Integrated Circuits), hence why it's known as Inter-Integrated Circuit (I2C) communication.

What is I2C and how it works?

I2C is a serial communication protocol, so data is transferred bit by bit along a single wire (the SDA line). Like SPI, I2C is synchronous, so the output of bits is synchronized to the sampling of bits by a clock signal shared between the master and the slave. The clock signal is always controlled by the master.

What is I2C frame format?

I2C Packet Format :

In the I2C communication protocol, the data is transmitted in the form of packets. These packets are 9 bits long, out of which the first 8 bits are put in SDA line and the 9th bit is reserved for ACK/NACK i.e. Acknowledge or Not Acknowledge by the receiver.

How do I scan an I2C address?

Connect the device you want to probe to the Arduino (preferably without connecting other I2C devices at the same time), and run the sketch. The scanner will cycle through all possible I2C addresses, and once it receives a response from the device, it will inform you of the address that worked.

What is bus driver in Linux?

Drivers typically declare an array of device IDs of devices they support that reside in a bus-specific driver structure. ... When a driver is registered with the bus, the bus's list of devices is iterated over, and the match callback is called for each device that does not have a driver associated with it.

How probe function is called in Linux?

Probe() happens at the time of device boot or when device is connected.For a "platform" device the probe function is invoked when a platform device is registered and it's device name matches the name specified on the device driver.