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by makbut
Mon Jun 26, 2017 10:27 pm
Forum: Networking and servers
Topic: Connecting multiple pis together via ethernet
Replies: 2
Views: 1236

Connecting multiple pis together via ethernet

Hello everyone, I have four raspberry pis, which I want to connect together using ethernet via an ethernet hub. My project requires that the raspberry pis can talk to each other in order to synchronize at specific parts of the program, or to exchange messages in some other parts. I was told that I c...
by makbut
Thu Aug 14, 2014 8:15 pm
Forum: Automation, sensing and robotics
Topic: Xbee and xctu get data
Replies: 8
Views: 14721

Re: Xbee and xctu get data

c++.
ok, i will check it out later and post again :D
by makbut
Thu Aug 14, 2014 7:11 pm
Forum: Automation, sensing and robotics
Topic: Xbee and xctu get data
Replies: 8
Views: 14721

Re: Xbee and xctu get data

danjperron thank you very much for the posts, they were very helpful. well, i don't know very well c++ and that thing with the gui seemed really complicated to me. So i got the basic idea from what you wrote and i made a program which with success reads all the bytes that are sent from raspberry. I ...
by makbut
Wed Aug 13, 2014 6:06 pm
Forum: Automation, sensing and robotics
Topic: Xbee and xctu get data
Replies: 8
Views: 14721

Re: Xbee and xctu get data

Thank you very much for the answer.
I use xbee series 1 in transparent mode.
I will look more carefully your reply and try what you suggest.
I'll post as soon as I have a question or some progress.
by makbut
Wed Aug 13, 2014 11:04 am
Forum: Automation, sensing and robotics
Topic: Xbee and xctu get data
Replies: 8
Views: 14721

Xbee and xctu get data

Hello, well it may be a litlle irrelevant but i don't know, maybe i should post it on general discussion(?) I have an xbee on raspberry pi and another xbee in my laptop connected through usb. On laptop the XCTU software is running and i use the terminal window to send commands and read what raspberr...
by makbut
Fri Jun 20, 2014 1:36 pm
Forum: Troubleshooting
Topic: Sd card problem
Replies: 2
Views: 376

Re: Sd card problem

pff... ok. thanks for the answer.
by makbut
Fri Jun 20, 2014 1:23 pm
Forum: Troubleshooting
Topic: Sd card problem
Replies: 2
Views: 376

Sd card problem

Well, i had a problem with raspbian so i erased all data in my sd card and then reinstalled raspbian . But then i remembered that 1-2 weeks ago i had copied-pasted all the files from sd card to my pc. Is there any way to use those files to at least recover my raspberry 2 weeks ago? I would appreciat...
by makbut
Mon Apr 14, 2014 10:41 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Rpi cameras
Replies: 11
Views: 1920

Re: Rpi cameras

Well, hello again. i bought the cameras i told about in my first post and they work. But there is a problem that i cannot understand. I use opencv to capture images or video. In the video i see there is a small delay, about 1 sec. For example, when i put my hand in front of the camera until i see it...
by makbut
Wed Mar 12, 2014 4:22 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Rpi cameras
Replies: 11
Views: 1920

Re: Rpi cameras

i want to use two cameras and there is only one port and from what i have understood two official cameras can't be connected at one board. ok. i will search it a little more to see what i can do. Maybe i will use any of these : http://elinux.org/RPi_USB_Webcams , if i don't find a solution. Thanks f...
by makbut
Tue Mar 11, 2014 1:28 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Rpi cameras
Replies: 11
Views: 1920

Re: Rpi cameras

Ok, i will try to look at it some way, if i can..
Something last. Do the above apply for any similar camera such the one i posted?
by makbut
Tue Mar 11, 2014 1:09 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Rpi cameras
Replies: 11
Views: 1920

Re: Rpi cameras

It might work as a USB camera as long as it conforms to USB webcam specs. when you say "as long as it conforms to USB webcam specs" what do you mean? the Raspberry Pi foundation 5MP camera is a very similar model but can connect directly to the Raspberry Pi camera interface so would be much faster ...
by makbut
Tue Mar 11, 2014 12:50 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Rpi cameras
Replies: 11
Views: 1920

Rpi cameras

Hello. I want to use usb cameras in raspberry. I have found several usb cameras but from what i have understand by reading in the forum there may be problems of compatibility? Does anyone know if this camera https://www.leopardimaging.com/LI-OV5640-USB-72.html would work for example? Can i tell by s...
by makbut
Fri Feb 28, 2014 5:13 pm
Forum: Bare metal, Assembly language
Topic: Jpg format/From camera to screen
Replies: 10
Views: 2189

Re: Jpg format/From camera to screen

Ok, i see, it sounds like i had thought of it. Thank you for the help, i'll see how i will do this.
by makbut
Fri Feb 28, 2014 9:37 am
Forum: Bare metal, Assembly language
Topic: Jpg format/From camera to screen
Replies: 10
Views: 2189

Re: Jpg format/From camera to screen

@ dwelch67: I haven't an image in jpeg format that i want to show on screen. I want to use the camera bare metal. I found a camera manual that describes how to capture an image by sending the apropriate commands using the uart. Then from what i understood, the image bytes that are sent, are in jpeg ...
by makbut
Wed Feb 26, 2014 11:58 pm
Forum: Bare metal, Assembly language
Topic: Jpg format/From camera to screen
Replies: 10
Views: 2189

Jpg format/From camera to screen

Hello. i have a question that maybe i haven't think well but by some quick search i did, i didn't find something to cover me. Well, let's say that i have a ttl serial jpeg camera. As i have understand when i capture a picture the data that are sent from camera to raspberry pi are in jpeg format. Now...
by makbut
Tue Feb 18, 2014 8:32 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How the pwm works (in theory)
Replies: 8
Views: 2656

Re: How the pwm works (in theory)

Now it makes perfect sense. Thank you very much!
by makbut
Thu Feb 13, 2014 2:45 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How the pwm works (in theory)
Replies: 8
Views: 2656

Re: How the pwm works (in theory)

I see, thank you.
by makbut
Wed Feb 12, 2014 5:33 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How the pwm works (in theory)
Replies: 8
Views: 2656

Re: How the pwm works (in theory)

Hello, thank you for the useful information about the MSENi bit. I have some more questions. In the BCM2835-Arm-Peripherals at page 141 it says: "PWM clock source and frequency is controlled in CPRMAN" . Can someone explain what does it means? (So the pwm clock is used to define the period which wil...
by makbut
Thu Dec 05, 2013 1:40 pm
Forum: Bare metal, Assembly language
Topic: bare metal programming in c/c++ ?
Replies: 8
Views: 5076

Re: bare metal programming in c/c++ ?

Thank you all for your repplies.
I'll check all the above and if i have any questions i will post.
by makbut
Sat Nov 30, 2013 9:55 am
Forum: Bare metal, Assembly language
Topic: bare metal programming in c/c++ ?
Replies: 8
Views: 5076

Re: bare metal programming in c/c++ ?

ok, i see, i hadn't thought that correctly. thank you.
by makbut
Fri Nov 29, 2013 3:04 pm
Forum: Bare metal, Assembly language
Topic: bare metal programming in c/c++ ?
Replies: 8
Views: 5076

Re: bare metal programming in c/c++ ?

ok, i had a look at that topic and then i searched various sites. I downloaded Sourcery Code Bench Lite which is supposed to compile c++ programmes as well. I spend some time, trying to find what to type, in order for the final .img file to be produced. I found a simple programm in c which blinks ok...
by makbut
Thu Nov 28, 2013 4:31 pm
Forum: Bare metal, Assembly language
Topic: bare metal programming in c/c++ ?
Replies: 8
Views: 5076

bare metal programming in c/c++ ?

Hello ! I would like to know if i can use c++ for bare metal programming raspberry pi . I have seen some examples in c, but i would like to know if it is also possible in c++ and how? For example, i downloaded from here for c https://launchpad.net/gcc-arm-embedded but i cannot understand if c++ is p...
by makbut
Mon Nov 18, 2013 12:47 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interrupt handling
Replies: 20
Views: 90985

Re: Interrupt handling

ok i see, thanks a lot for the help.
by makbut
Mon Nov 18, 2013 10:49 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interrupt handling
Replies: 20
Views: 90985

Re: Interrupt handling

Hello. I read all of the above answers and i want just to confirm what i have understood. I am totally noob in using the raspberry pi. So basically when using the raspberry pi, i cannot have a gpio pin generate a hardware interrupt which will run my ISR for that specific interrupt. What i can do is...
by makbut
Mon Nov 18, 2013 9:39 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interrupt handling
Replies: 20
Views: 90985

Re: Interrupt handling

Hello. I read all of the above answers and i want just to confirm what i have understood. I am totally noob in using the raspberry pi. So basically when using the raspberry pi, i cannot have a gpio pin generate a hardware interrupt which will run my ISR for that specific interrupt. What i can do is ...

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