What is I2C, Basics for Beginners

Рет қаралды 161,533

Күн бұрын

NEW! Buy my book, the best FPGA book for beginners: nandland.com/book-getting-sta...
I2C is one of the most common interfaces to connect chips on a circuit card. From reading temperature sensors, to reading data from ADCs, to driving DACs, to passing information between two processors, I2C is a very common interface that has been around for decades.
If you've never worked with I2C, it can be a bit overwhelming. But this short introduction will tell you everything you need to know to get you confident when working with your own I2C circuits. Learn about the data transmission protocol called I2C, or Inter-integrated circuit. I talk through the basics of I2C for both a microcontroller or FPGA implementation, how data is exchanged, and how the hardware is designed. If you like this video, please help me make more content by supporting me on Patreon.
patreon.com/nandland
And if you want to test FPGA code on your own, buy a Go Board, the best FPGA development board for beginners. It comes with lots of great tutorials.
nandland.com/goboard/introduction.html

Пікірлер: 117

@dakotahrivers6640 6 ай бұрын

Final project for my final class for college before getting my degree is building a temperature sensor system with an Xmega board, a UART LCD display screen and a TWI compatible temp sensor. It is a two week project and i am starting it 2 days before last day of term. I got a job lined up pending graduation. Wish my luck, brethren. Hopefully next week i'll be an engineer.

@plop55 3 жыл бұрын

Nothing like a South Park reference in a video about I2C lol

@joecseszko7181 3 жыл бұрын

Great video, and great southpark reference at 12:19

@robertlongoria765 3 жыл бұрын

this is the i2c gold standard on youtube. thanks!

@cjcjonesit 4 жыл бұрын

You do a great job explaining this concept on I2C. Thanks a million

@Blandified 3 жыл бұрын

Such a great teacher that explains everything very clearly! Thanks for the vids

@adrianobuhov52 3 жыл бұрын

I've always thought that it is hard to understand how SPI works, after watching this video it is clear to me that things can be understood much more easier if they are explained in a fun way, just like this guy did, thank you!

@adrianobuhov52 3 жыл бұрын

This comment should've been posted under another video of yours, but still thank you

@iangraham6730 2 жыл бұрын

Best explanation of I2C I have seen yet . . . thanks for sharing!

@ScottCov 23 күн бұрын

Been trying to get a handle on this for a few days...This did it clearly. Thank you!

@dilectantetech8734 3 жыл бұрын

I think he need to give more detail on the protocol. This is an amazing explanation on I2c, specially on the roll of the the pullup resistors. In many tutorial I have seen nobody explain it, may be because they do not know it. Excellent tutorial!

@knguyen1801 3 жыл бұрын

Thank you. You do a great job simplifying a complicated concept.

@1sadcock Жыл бұрын

Great video on this topic! The best I have seen so far.

@MdMaksudUlKabirRico 2 жыл бұрын

Thank you for this video. You explained it well. You are a great teacher. I am eagerly waiting for more videos regarding this topic. Wish you all the best.

@jamesmccoy8568 3 жыл бұрын

Who else is ADDICTED to NANDLAND??

@MohanRaj-pp6zz Жыл бұрын

You are very clear to the point. Thank you for the good explanation.

@natalieastafeva4885 3 жыл бұрын

Your explanation is very clear,thank you!

@firstuser5448 Жыл бұрын

incredible video - very concise and helpful. thanks!

@EgyGyro 3 жыл бұрын

Nice introduction to the video 😊. Grabbed my attention.

@abutaymiyyahlectures 3 жыл бұрын

best i2c explanation on youtube, you are a beast, thank you :D

@billydeka0239 4 жыл бұрын

Explained in a very clear way thanks from italy

@selvalooks 2 жыл бұрын

Wonderful !!! clearly explained om understandable way.

@nooterdooter6497 Жыл бұрын

Golden! Great video!

@palavos12 4 жыл бұрын

If it's possible, can you do a video about can bus ?

@dans.8198 3 жыл бұрын

Loved the South Park pun on Mr.Slave. The word “mister” was originally a different pronunciation of the word “master”. So Mr.Slave actually means “Master Slave” :-)

@justinpower4475 2 жыл бұрын

Best explanation of pull up resistor I've seen...

@Abh_92 2 жыл бұрын

Thank you! Great explanation

@fernandosaenz1495 3 жыл бұрын

Great explanation, thank you

@daysirc 4 жыл бұрын

Great explanation :)

@maxwang2537 3 жыл бұрын

Great video, thanks!

@julianpitney7835 Жыл бұрын

Very clear and articulate. Thanks for the crash course. +1 for South Park reference

@dinamohamed782 4 жыл бұрын

Thank you ,very interesting explanation

@julles79 4 жыл бұрын

Great explanation, please do one about I3C. Thanks!

@sleepy_izutsumi 2 жыл бұрын

thank you very much! an awesome vid and awesome explanation =)

@nashs.4206 4 жыл бұрын

Great video! Would you also consider making a tutorial on the CAN bus? (As other commentators have pointed out!)

@boo9oob 3 жыл бұрын

08:00 hahaah I know this feeling so well! :D wonderful video!

@test-qm4ey 3 жыл бұрын

Great video!

@ahmedmuhammed6905 2 жыл бұрын

I like the way that you use to explain

@funduk89 Жыл бұрын

thanks, well presented

@Adhithya2003 10 ай бұрын

Excellent presentation ❤❤

@jeff-73 11 ай бұрын

Good teacher.

@rambharat35 3 жыл бұрын

nice explanation . helpful

@scalesr1 4 ай бұрын

Thank you for this - I'm trying to get my head around I2C for an enhancement to an existing project (sending data to a PIC) and I have no idea where to start! This is an excellent introduction - thank you.

@MuhammadShahzad-dx5je 3 жыл бұрын

Thank you so much sir!

@vickysomkuwar6551 2 жыл бұрын

Nice information, love from India.

@tianshuma241 3 жыл бұрын

You explain this so easy and clear. Thank you ! And you are very handsome!

@psychomexicanscientists1076 4 жыл бұрын

5:38 Good reference to Taxi Driver!

@michaeleliseev7304 4 жыл бұрын

This helped me in my project in electronics

@drogenfeld 4 жыл бұрын

I'm watching this literally the morning before an important exam to get some last minute details haha

@hekto_pyc9998 4 жыл бұрын

Спасибо)

@TheDudeeAbides 3 ай бұрын

"Mr. Slave" 🤣🤣 I could tell you were holding back the chuckles for that South Park reference lol

@trustmeimanengineer4081 Жыл бұрын

Your vidieo is so good for me! Thank you! Plz talk more about the timing. Star edge timing, ack timing, stop tim.... And reading frame. I have use i2c to make my project recently but there a problem, that 2 slave is not synchronous about timing or whatever idk how to say the detail. Both of them has 400kB bandwidth, but master cant talk with them on a same bus. I have to create new i2c IO in software and it seem to be waisted i2c's ability.

@AA7Productionz 3 жыл бұрын

Great videos, i have a doubt though. After pulling SDA low for ACK why does the line go through a clock pulse before sending the next data? Is it part of the I2C structure?

@futurelu623 4 жыл бұрын

Hi, this video is very good! But maybe there is some thing missed in the data example. After the slave address is put on the bus by master, then the register address in the i2c slave device should be put on i2c bus, then the data should be put on the i2c bus by slave or master depending on read or write operation. What I mean is the register address in the i2c slave address is missed in your example.

@stevealemdar9052 4 жыл бұрын

keep it up pls

@alejandrarosellperez6281 4 жыл бұрын

damn you just saved me from a paaaaaainful exam tomorrowww

@vasista1997 3 жыл бұрын

12:19 Mr Slave!! South Park reference

@JeremyCook 2 жыл бұрын

So would the 7 address bits + the R/W bit be considered the "header?" is that the correct term? So an 8-bit header, and 8-bit data section?

@vanik2428 2 жыл бұрын

Hi I understood the way u explianed thank u. I have one question is there any chance I2C work for 5Mbps

@rachidtahiri9514 4 жыл бұрын

Thank you so much , please do a video about CAN bus

@napsterjing5982 2 жыл бұрын

When I'm thinking "oh man, I've definitely seen this guy somewhere." then Doug DeMuro posts new video. Oh

@Nandland 2 жыл бұрын

THIIIIIISSSSSS is the new XILINX ULTRASCALE FPGA.... :)

@zachreyhelmberger894 3 жыл бұрын

If I have a DHT22 connected to an esp8266, for example, how long of a cable can I use before the data becomes goofy? 22 gauge wires 5 mm apart from each other is about 0.1pF/cm, so 10 cm of wire would have 1pF of capacitance on the cable.

@raisagorbachov 2 жыл бұрын

Interesting. I'm looking to put a BMP280, GPS and accellerometer on a Pi Pico. I2C looks the most promising way of doing it. I just have to figure out how.

@c_o_n_t_e_n_t3420 3 жыл бұрын

how i2c handles "no true scottsman" problem with multiple masters, would probably make a good video. Its such a common logical problem that applies to everything from philosophy to multi-threading to hardware. I like that most of your videos are focus on the applied tech, in the weeds at 4am, how do i do this. giving an overview and getting down into the design choices and compromises that i2c makes to do multiple masters, I think would make a good vid. mr. slave agrees.

@kirkkeinanen592 2 жыл бұрын

Could a microcontroller i2c slave write to i2c eeprom? For example the attiny441 lists only an i2c slave interface.

@davelopez9161 2 жыл бұрын

Distance. I did not hear you discuss how far this bus can be transmitted?

@dereksavage8728 2 жыл бұрын

i love you

@benjaminwilson9007 Жыл бұрын

So with a Maximum of 400 Kilo-Bits per second, does that specification require a clock with a maximum frequency of 400,000 Hz or .4 MHz?

@kongyuebanshan6400 4 жыл бұрын

In general, I2C communication is the mutual communication between ICs and ICs on the board. If there is IC and IC communication between boards, what are the advantages and disadvantages? How stable is the communication?

@Nandland 4 жыл бұрын

Between boards have similar advantages and disadvantages. The comms should be OK unless there's a significant distance or lots of noise on the line. However it won't be as good as a differential signal interface.

@shubhamnayak9369 2 жыл бұрын

who sends the acknowledge bit when master reads the data?

@peterbolke6846 2 жыл бұрын

Hi Dejan, This is a great explanation of the concept of connecting I2C items on the same board. I am very new to doing anything at all with electronics but my current project uses the MPU6050 module and I want to add a distance measuring module into the project too + powering some servos with the PCA9685 that also uses the I2C protocol. I have the MPU6050 actuating 4 x servos at the moment on an Arduino Uno with regular breadboard and external power supply. The code seems to stop working after a few minutes and I am struggling to find a fault that would cause this. QUESTION: You show an Arduino Mega in your wiring diagram... is that because you anticipate the code will be a bit heavy for the Uno? I am wondering if limited Uno memory is the issue I have with the MPU6050 at the moment - and if I should consider using a Mega for this module as i want to add other I2C items..?

@AndrewKiethBoggs 9 ай бұрын

For something like this application, uno would be fine. Mega is really used for things like IO needs. Maybe if you need a bunch of analog or digital pins, mega is good to use. Hope you got to explore electronics more!

@michaelcostello6991 4 жыл бұрын

I think we just addressed a slave here but not a register within a slave. I mean a slave can have multiple registers that you may want to write/read to.

@aaronbarragan8339 3 жыл бұрын

you explain very well despite my ver bad understanding on basic electric circuitrey. Do you happen to have any videos on that? c:

@PaulineMiddelink 4 жыл бұрын

Hnm, i dont agree with the uncommonness of repeated start conditions, almost every register based i2c device uses it to not loose the bus between the initial write (what register do i want to address) and the next read for the data.

@Nandland 4 жыл бұрын

Thanks for pointing that out!

@kongyuebanshan6400 4 жыл бұрын

@zetaconvex1987 11 ай бұрын

How often are pull-up resistors actually used, though? And why not set your master pins to be open-drain with a pullup as an alternative?

@Nandland 11 ай бұрын

The pull-up resistors are required. They're always used. You need something to pull the CLK and DATA lines up to 3.3V.

@curtisnewton895 3 жыл бұрын

10:40 the data are valid when the clock is transitioning HIGH, not low

@nabilmarsel8792 4 жыл бұрын

hello, in 2:20, we use ADC to digitalizing the data for the µC but the I²C use digital data, so why we need to digitalizing.

@futurelu623 4 жыл бұрын

ADC is used to transfer some kind of analog signal, such as analog voltage, to digital format, then this kind of digital data can be transfered via I2C to micro comtroller. So that your code can recogonize it.

@nabilmarsel8792 4 жыл бұрын

@@futurelu623 thank you.

@HL65536 2 жыл бұрын

Thanks for assuring me that my 3v3 device will not blow up if connected to 5V IO (pull up to 3v3).

@mumblic 2 жыл бұрын

Good video but it seems you forgot register address in your diagram.

@asarangan 3 жыл бұрын

Where is the next video on implementation?

@razahyder9796 3 жыл бұрын

when both lines are low then it is a read/write condition!

@ZizoAhmed 4 жыл бұрын

exit full screen ... hit like and subscribe and then return back to the explanation ♥

@user-rx6jb6nj2e 4 жыл бұрын

could you write the code step by step?

@Roadtosucces. 3 жыл бұрын

names of 2 pins????

@ogito999 3 жыл бұрын

I remember making this in Minecraft once

@pcbworks 2 жыл бұрын

Mr.Slave :)

@seshagiritn7881 2 жыл бұрын

is it possible that two slaves can pull the bus low . i understand the Device address will target a particular device but inadvertently is it possible more than one slave can pull the bus low

@bagussusilo2678 3 жыл бұрын

Mr slave and sir Master

@jeff-73 11 ай бұрын

The only thing that would make this video better is to speak in Mr Garrison's voice for the second half. lol

@sapientum8 4 жыл бұрын

No, you are not mirrored. You are welcome.

@rvndom5744 Жыл бұрын

you are a fucking god

@yadavsomnath6188 3 жыл бұрын

Sir, I need CAN from you.. I have subscribed your channel with notification... Please..please Do a video on CAN..with same manner as you used in this video... #ApriciateYourWork.. #GreatVideo..

@yadavsomnath6188 3 жыл бұрын

At one point I have stuck at your video that "where is register address?"... Please clear my doubt..

@Oscar-jg9gg 2 жыл бұрын

you defined half duplex wrong. half duplex is the fact that data transmission happens in one directed at a time per carrier

@dice4866 2 жыл бұрын

*cough, my drunk ass though he was Toby Maguire for a split second. Just share it.

@kumarm1780 2 жыл бұрын

Nice one also check the playlists: kzfaq.info/sun/PLyp1I7W35-q1su6Nvbvd09mEgT-CWz0MD

@karthikbiju3367 4 жыл бұрын

Ist comment

@mihailoknezevic1870 4 жыл бұрын

Damn it! I'm late again!

@isabelserrato2248 Жыл бұрын

great video, but would love it if you shifted away from master/slave terminology, main/secondary has the same initials and understanding without using insensitive language

@johnrogers235 2 жыл бұрын

hahaha Mr Slave "jesus christ"

@RohitYadav-kv8vc Жыл бұрын

Mr. slave🤭😅😅😅😅😅

@manjunathparemajilu9739 2 жыл бұрын

Bro please dont give example as slave

@youssefosama1623 2 жыл бұрын

terrible explanation

@alanhightower976 2 жыл бұрын

You cannot run dual voltage devices in an I2C setup. Modern hardware's high side drivers are essentially P-channel MOSFETS. While the high side driver isn't used in an I2C application, most I2C interfaces on microcontrollers, FPGAs, etc are on I/O buffers that have one present. P-channel FETs have a body diode effect that will leak any over-voltage on the I/O pad to the VIO rail as the virtual body diode's cathode is that direction. This will couple all the I2C noise at the higher pad voltage (minus a diode drop) to the lower voltage VIO rail. Bad bad idea.... Don't even suggest it's possible.