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by saper_2
Mon Jun 04, 2018 9:11 pm
Forum: HATs and other add-ons
Topic: [Review] Waveshare 3.5" HDMI display
Replies: 1
Views: 1441

Re: [Review] Waveshare 3.5" HDMI display

10. Setup
Post reserved for chapter 10.
by saper_2
Mon Jun 04, 2018 9:09 pm
Forum: HATs and other add-ons
Topic: [Review] Waveshare 3.5" HDMI display
Replies: 1
Views: 1441

[Review] Waveshare 3.5" HDMI display

Hi all, I got in my hands next HDMI 3,5" display, no not next kedei :lol: This time I got a Waveshare one (I stumbled upon promotion and I got the display for less than half of it's normal price - yes, I'm lucky one :P ). 0. Intro I got this display: https://www.waveshare.com/product/3.5inch-hdmi-lc...
by saper_2
Sun Apr 22, 2018 7:04 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [quick-guide] mcufriend 3.95 inch tftlcd driven from FBTFT
Replies: 10
Views: 5318

Re: [quick-guide] mcufriend 3.95 inch tftlcd driven from FBTFT

--- cut --- Really silly question I just started programming similar device and so far I am unable to find DESCRIPTION of D/C signal. I have it currently disconnected - so maybe that is why I cannot get anything to show on screen. But I got software issues so I am not that concerned. Is your /RD co...
by saper_2
Sun Apr 22, 2018 6:51 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Raspberry Pi Zero W with SIM800l not work
Replies: 2
Views: 995

Re: Raspberry Pi Zero W with SIM800l not work

Hi, You know, we can't read your mind to tell what circuit you have... Give circuit schematic or diagram at least, but something telling me that you connected Vcc from sim800 to 3,3V from rpi.... This won't work, it shouldn't work on Pi3 either. While it might worked on Pi3 because Pi3 have much mor...
by saper_2
Sun Apr 22, 2018 6:25 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Terminal on ePaper
Replies: 4
Views: 612

Re: Terminal on ePaper

Hi, e-paper (e-ink) is just too slow for this... If want to do it so badly U need (unfortunately) to write by yourself a driver (kernel module) and then setup it as console framebuffer - how: I do not know, I never been interested in this. maybe u'll be able to get somewhere with fbtft or it's succe...
by saper_2
Sun Apr 22, 2018 9:49 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [quick-guide] mcufriend 3.95 inch tftlcd driven from FBTFT
Replies: 10
Views: 5318

Re: [quick-guide] mcufriend 3.95 inch tftlcd driven from FBTFT

I followed the tutorial,changed the resolutin for 3.0".When it boots it shows the boot console but not the retropie gui.How can i make it so it shows the retropie gui? I don't know. I am not interested in retropi or other distros except official one (raspbian), retropi should have forum too - ask t...
by saper_2
Mon Apr 16, 2018 10:08 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [quick-guide] CAN bus on raspberry pi with MCP2515
Replies: 145
Views: 174494

Re: [quick-guide] CAN bus on raspberry pi with MCP2515

Hi, I've got one of these modules to try to talk to some NMEA2000 devices. A couple of questions. How important do you think the 1uF tantalum is if the 5V supply is a good one nearby? I always put right beside the IC always a cap 100n fo generic digital or MCU (unless datasheet suggest more) chip, ...
by saper_2
Sun Mar 25, 2018 8:22 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: KeDei 3.5 inch 480x320 TFT lcd from ali
Replies: 233
Views: 182764

Re: KeDei 3.5 inch 480x320 TFT lcd from ali

adquiri esta pantalla kedei 3.5 inch SPI TFTLCD 480*320 16bit/18bit version 6.3 2016/11/1 y ya estoy cansado de tanto probar controladores alguien prodriadarme una solucion This is English forum , translate your question/problem to English, or please go to your language-specific sub-forum: https://...
by saper_2
Sun Mar 18, 2018 8:56 pm
Forum: Troubleshooting
Topic: STICKY: Setting up HDMI output when video output is wrong.
Replies: 533
Views: 922606

Re: STICKY: Setting up HDMI output when video output is wrong.

Hi, So no one had any idea... I figured it out... The dirty way solution The display have 480x320 px, when I have it in 1920x320 the image is "stretched" but the pixel clock have ~47MHz this is allowed value by the scaler chip on display board. So I used a "scale" option from xrandr. Here is the sim...
by saper_2
Thu Mar 08, 2018 8:56 pm
Forum: HATs and other add-ons
Topic: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi
Replies: 47
Views: 48432

Re: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi

Hi, Hmmm... I toyed a bit with this GL driver (in Full KMS), and I think I figured it out, but I'll wait few days before I'll publish my solution, because I want to see if this can be done prettier (right now somehow I don't like how I did this ;) ) See demo, pay attention to size of desktop element...
by saper_2
Wed Mar 07, 2018 11:43 pm
Forum: Troubleshooting
Topic: STICKY: Setting up HDMI output when video output is wrong.
Replies: 533
Views: 922606

Re: STICKY: Setting up HDMI output when video output is wrong.

Hi, I have (and not only me :D) a mini hdmi display (kedei 3,5" hdmi - check my review for more info :D). I got inspired by another owner ot this display - he want to get native resolution with openGL driver enabled - this seems a bit interesting so I started to look around how to get this little fe...
by saper_2
Fri Feb 23, 2018 5:01 pm
Forum: HATs and other add-ons
Topic: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi
Replies: 47
Views: 48432

Re: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi

Hi guys and girls, has anybody used this screen with the openGL desktop driver (vc4) with its native resolution 480x320? The screen doesn't give the 480x320 resolution via the EDID to the driver. EDID - I think it's too advanced for kedei :lol: :lol: , joke aside - normally display driver pick the ...
by saper_2
Tue Jan 09, 2018 8:51 pm
Forum: HATs and other add-ons
Topic: Screen to fit in place of Decora light switch
Replies: 6
Views: 1491

Re: Screen to fit in place of Decora light switch

And they do a *round* one! How cool is that? http://www.4dsystems.com.au/product/uLCD_220RD_PI/ Expensive like f.. hell ;) and the image quality won't be like on those photshop'ed photos :lol: :lol: I found on aliexpress the display itself (1.38" round lcd module) but price is ......., also I found...
by saper_2
Thu Jan 04, 2018 1:40 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Different GPIO Pin out for RFID reader?
Replies: 4
Views: 1177

Re: Different GPIO Pin out for RFID reader?

Hi, I think you'll have problems with running both RC522 & the display on SPI . The display practically will hog all the bandwidth of SPI while leaving no room for comm with RC522... I'm not sure, but I do remember something that those popular cheap boards with rc522 won't work on i2c because (if my...
by saper_2
Thu Jan 04, 2018 12:21 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [quick-guide] CAN bus on raspberry pi with MCP2515
Replies: 145
Views: 174494

Re: [quick-guide] CAN bus on raspberry pi with MCP2515

david_1234 - for reinstalling, something u must have broken/not installed.

As for what u want, ask uncle google: https://goo.gl/e7NZmB .
by saper_2
Wed Jan 03, 2018 10:47 pm
Forum: HATs and other add-ons
Topic: Using a different LCD panel with KeDei 3.5" HDMI board?
Replies: 4
Views: 1735

Re: Using a different LCD panel with KeDei 3.5" HDMI board?

You can buy the LCD screen separately: https://www.aliexpress.com/item/3-5-inch-39P-262K-SPI-TFT-LCD-Screen-ILI9481B-Drive-IC-18Bit-RGB-Interface-320/32824587937.html Big thanks for replacement :) (and more info about the display) , I have updated my review about this kedei hdmi display and gave yo...
by saper_2
Wed Jan 03, 2018 10:22 pm
Forum: HATs and other add-ons
Topic: Screen to fit in place of Decora light switch
Replies: 6
Views: 1491

Re: Screen to fit in place of Decora light switch

Here is some "wide" TFT displays, you can check the seller of those displays for something else... https://www.aliexpress.com/store/product/2-7-inch-40PIN-16M-TFT-LCD-Screen-ILI8961-Drive-IC-960-240-SPI-RGB-Interface/224898_32271291945.html https://www.aliexpress.com/store/product/2-8-inch-34PIN-TFT...
by saper_2
Sun Nov 26, 2017 1:30 pm
Forum: HATs and other add-ons
Topic: Can this LCD display be used on RPI ?
Replies: 3
Views: 917

Re: Can this LCD display be used on RPI ?

Hi, I'm sorry, that my replay don't follow one thought - I have parallel thought process :P , so here is some of my thoughts about yours display: I gave a quick look at the DS - those displays need constant refresh so directly driving it from Rpi won't work.. You can use small MCU with CortexMx core...
by saper_2
Tue Nov 14, 2017 6:41 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Connecting Dot ‐ matrix Character Vacuum Fluorescent Display Module
Replies: 1
Views: 428

Re: Connecting Dot ‐ matrix Character Vacuum Fluorescent Display Module

This controller looks like generic classic hd44780. Your display model is parallel by default, if you want serial, then you have to re-solder the jumpers (JP2 to JP7) according to datasheet. But you have to use voltage level shifter (translator) for SI/SO line because the display have to be powered ...
by saper_2
Tue Nov 14, 2017 6:24 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: KeDei 3.5 inch 480x320 TFT lcd from ali
Replies: 233
Views: 182764

Re: KeDei 3.5 inch 480x320 TFT lcd from ali

Guys hello! I have such a screen: https://cdn1.savepice.ru/uploads/2017/10/8/2007f3f02c7c2d5cc638c9026a5352b2-full.jpg I downloaded from here: http://kedei.net/raspberry/raspberry.html file: LCD_show_35hdmi_vertical Through the console, I started the file inside the archive, and the drivers were in...
by saper_2
Tue Nov 14, 2017 6:02 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [quick-guide] CAN bus on raspberry pi with MCP2515
Replies: 145
Views: 174494

Re: [quick-guide] CAN bus on raspberry pi with MCP2515

Hi I get can0 and MCP initialized, I can enter the send lien with no error. The only difference to you setup is I hab a 16MHz quartz, but I have changed the line in config.txt dtoverlay=mcp2515-can0,oscilator=16000000,interrup=12 ... CUT ... what tells me the 16Mhz clock is not accepted. further qu...
by saper_2
Thu Oct 19, 2017 6:33 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [quick-guide] CAN bus on raspberry pi with MCP2515
Replies: 145
Views: 174494

Re: [quick-guide] CAN bus on raspberry pi with MCP2515

Hello, I was follow this tutorial successfully on Debian Jessie. But with Debian Stretch I cannot find net folder in : ls /sys/bus/spi/devices/spi0.0/ or ls /sys/bus/spi/devices/spi0.1/ Someone I have same problem ? or any ides to test ? Check connections.... If On deb 8.x works then on 9.1 should ...
by saper_2
Sun Oct 15, 2017 10:39 am
Forum: HATs and other add-ons
Topic: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi
Replies: 47
Views: 48432

Re: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi

Hi, Friend, here's the video: https://www.youtube.com/watch?v=yVk9u0f31I4 The screen shows, but very badly. Then goes out and all. Answer in points: 1. And connect the POWER to THE DISPLAY BOARD not the raspberry board - how it works now? 2. What kernel you are using - stock=original , or kedei (thi...
by saper_2
Sat Oct 14, 2017 1:03 pm
Forum: HATs and other add-ons
Topic: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi
Replies: 47
Views: 48432

Re: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi

I don't know what u're doing wrong.... The display (my at least) work out of box (well it's not very readable) but at least I can see if it works: disp-working-after-first-boot.jpg Here is a full my config file, I tested it on latest rapsbian 2017-09-07-raspbian-stretch.img : # For more options and ...
by saper_2
Thu Oct 12, 2017 6:08 pm
Forum: HATs and other add-ons
Topic: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi
Replies: 47
Views: 48432

Re: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi

Hi, Check if your display works at all: take the display (if u have it connected to RPi then disconnect from Pi), connect to display only power via microusb , toggle switch to see if it will lit up at all - Working display without RRi (nor connected signal to HDMI) should be blue (it might show up "...

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