tft lcd hy28b read lcd manufacturer

I have purchased the HY28B display as per the link below, this display uses the ILI9325 controller and has ability to interface via SPI/ 8 bit / 16 bit.

HAOYU Electronics 2.8 Touch Screen TFT LCD with all interface [HY28B] - a:link,a:visited{text-decoration:none;color:#0000FF;} Description LCD Controller ILI9325

I have previously used the UFTF lib to sucessfully configure another display that uses the ILI9325 controller with an 8 bit interface, however after implementing UTouch this left me with little usable pins, hence I would like to get the above display working via SPI if I can, however it would appear that UTFT only supports this controller (ILI9325C) in 8 bit mode, no serial support.

Anyone have any thoughts on how to get this working, or can I use a nasty hack similar to what is alluded to in the link below for the 1.5" TFT that uses the LPH9135 controller ?

HY28B para colocar meu hf modelo RS918 porem depois de estalado  quando ligo ele fica todo branco  gostar de saber se term que fazer algumas alteracoes no display

My mod firmware, like the original UHSDR firmware, supports displays with a resolution of 320x240, 480x320 and 640x480. As for the hardware, I"m still working on the RF board of my "russian clone". As expected, his UI board will support HY28B and HY32D displays, but now I can’t tell you anything specific about connecting different displays, sorry - I haven’t done prototyping yet. You"d better contact the head of the UHSDR group, Andreas DF8OE:

I still want to use a 5" display with my RS-918 and your firmware. I need to decide what kind of interface cable/pins I should order with the display. I intend to use this display: https://www.buydisplay.com/5-inch-tft-lcd-display-capacitive-touchscreen-ra8875-controller-800x480 . Can you confirm:

SSB filters do not require changes. I add CW filters with a width of 200 and 100 Hz at the request of one comrade. And the whole project with the finalization of the UHSDR firmware is purely commercial, although everything is laid out openly. I just want the firmware of my future commercial mcHF-Amber clone to be as good as the hardware. Details will be ready to disclose at the end of summer. 73!

HY28B Adapter - the same 2.8" TFT LCD w/Touch module adapted to replace the Character LCD on a PSoC 5LP Development board. Other uses, such as connecting to other boards via a ribbon cable, can be implemented.

This is a cheap 320×240 2.8″ TFT LCD module that uses the ILI9320 controller for the display and the XPT2046 controller for the resistive touch panel. I purchased the module over a year ago but only had the opportunity to try it out recently. The module has since been phased out by the manufacturer and replaced with the HY28B that uses the ILI9325C controller.

To my disappointment, the connectors on this module use 2mm pitch, and not the standard 2.54mm (0.1″) pitch used by most hobbyist breadboards, sockets and connectors. I also tried to search eBay and could not find anything that might be useful, other than a few 6-pin connectors for the Zigbee module which also happens to use 2mm pitch, although I did find a photo here taken by someone who has jumper cables with small headers fitting the 2mm pin pitch of this module.

This is the time when some creativity is needed. Luckily since many of the parallel communication pins on the two 20-pin connectors on both sides of the module are not used in SPI mode, I am able to break some of the unused pins, leaving space for me to bend other pins and solder them to standard 2.54mm male connectors in order to fit a breadboard:

Although the ILI9320 supports both parallel and serial communications, the HY28A module is configured to only use SPI. Using the example source code provided by the seller, I was quickly able to make this LCD show some text and graphics:

Like most other resistive touch controllers, the XPT2046 will return a raw coordinate value when a press is detected on the panel. For the coordinate to be useful, the code must convert it to a coordinate within the LCD resolution. To make things simple, the code can just look at the maximum and the minimum values that are returned when a press is detected on each corner of the panel and perform a linear conversion of the values to LCD coordinates:

Reading of the touch points can be done when TP_IRQ is low, indicating that a touch is detected. To reduce noises and achieve better accuracy, it will be better to perform several reads (5~10) for every press and calculate the average coordinate of the touched points. TP_CS must remain low when reading is performed, and set to high when reading is done. Coordinates reading must be stopped as soon as TP_IRQ is high, indicating that touch presses are no longer detected.

If you can’t see it, the text reads “PPDS STMJ” and “BAHX MBA”. The isolated drawing points are from the noises due to breadboard stray capacitance. A median filter can probably be used to remove these isolated points for better accuracy.

The text reads “Hello ABC” in the first picture and “123” in the second picture. Ignoring the inappropriate connections between two adjacent characters (due to the inability to detect when the stylus is released from the screen to stop connecting points), the other problem is the zig-zag and not smooth shape of the drawing. This is probably because of the slow speed of the PIC24. At 16MHz SPI speed and 32MHz clock speed on my PIC24FJ64GA002, some precious time is wasted communicating with the touch controller, calculating the touched coordinates and plotting them. During this time, other points drawn by the user were lost and not plotted on the screen.

As it takes considerable time to read the touch points and plot them, it is not possible to migrate the entire process into an interrupt to increase touch sensitivity as an interrupt routine also needs to finish executing as fast as possible. The only solution for a smooth drawing would be a much faster clock speed, or perhaps to use Direct Memory Accessing (DMA), supported by this PIC. However, at this moment I do not yet have the time to explore either option.

Codes for both the LCD and the touch panel make use of my custom SPI library for the PIC24FJ64GA002 to facilitate SPI communication. Before working with the LCD or the touch screen, you will need to initialize the SPI modules using the spiInit method from my SPI library as shown below:

While googling for any info about lcd controller I came across this page: http://heikki.virekunnas.fi/2015/raspberry-pi-tft/, author managed to get from manufacturer patch file for kernel sources and tested it with 4.1.y - on which lcd worked. But still LCD replace HDMI, but I want to use this screen as additional for user interaction, while the bigger on HDMI as presentation monitor.

Since, fbtft has been merged with rpi kernel, so the fb drivers (including ili9341.c) was moved to fbtft_device driver (so the author of page can"t compile latest kernel with driver+patch).

So something about hardware, which I reverse engineered by the "hard way" - "grab multimeter and run through all LCD FPC pins and shift register pins"

Now I noticed there is "9486L" which can suggest that LCD screen is controlled by ILI9486L, I found this LCD on taobao too but I can"t contact seller.

I"m pretty sure about D/C (Pin 37 on LCD) and Reset (Pin 19 on LCD) pins by looking into driver code, but I can"t identify other signals (WR/RD/CS/etc...)

- Controller is not ILI9341/ILI9325 - those are for smaller displays (320x240, etc...), I guess this might be ILI9486/9488 because they are for 480x320 displays. But when I compared init with DS it does not fit right so LCD can have a clone of ILI9486/9488 ...

- Module use only SPI interface and two CE signals (CE0 for touch controller, CE1 for LCD shift registers - compared to others lcd modules, in KeDei module this is swapped),

as you know (?) I"m very interested in using a touch screen together with the Raspi. This feature should be very interesting for choosing / starting scenes, sequences, ... already finished before at the PC.

At the moment I do so by using the web interface via smartphone and __Virtual Console__. That"s great already, but it would be nice if one could control that from the Raspi directly...

So, before buying one, carefully read the instructions to understand if eventually they will work in the QLC+ image. Or just point me to the instructions and I could tell if they will be OK.

Using the RPi along with QLC+ as a standalone solution (with the help of a TFT) would be nice, as there were no need for WiFi (router) at all (to use the web interface)!

Preparing a light show (more or less) off-line on a PC is very handy... Transferring such a project onto the RPi is already solved by your development... Controlling this light show via touchscreen would be very useful too.

In relation to this topic, could there be, or is there already a way to only show the Virtual Console? With these small touch screens it would be great to have this option and considering you keep mentioning that the Pi isn"t really meant for project editing anyway, some of the project editing features seem to be in the way on the Pi. I apologies in advance if this has already been brought up elsewhere!

Hello Patrik. Just to let you know that we do have now Lcd’s in stock but if you still need mcHF kit without display please email me at djchrismarc@genieprojects.co.uk so we can make custom invoice for your purchase.

I bought version 0.4 in 2016 and bought all the components including the LCD display. thus, having not yet assembled the rtx, is it possible to order only the two blank PCB version 0.6.3?

I have the tranceriver version 0.5. A HY28B model screen has broken down, I bought an identical model screen 2 years ago, and now that the test is broken, blank LCD. I have done several hours of testing with the other screen and all the work in bathroom. How would we do to get a new LCD that works well? Let’s see if there is any solution. Shipping is to Spain. Thank you

I wanted to say that I have the broken LCD, and one that I bought in another kit, when I put it on my MCHF it has a blank screen. All my work in vain. What solution can we give? can you send me another one?

Any word on when it will be ready? I was about to drop the money on a 0.7 kit when stock ran out. If it is going to be months more I may scream and drop the kilobuck+ on an IC-7200, which seems to have similar features + a 100W output.

I was wondering if the mcHF 0.6 components kit has the SMD components soldered on already. I assume (and hope) the answer is no, so that I will get to do some SMD soldering!

Hi, I just received my v0.6 boards and components last week, and have begun assembly of the UI board. I am wondering about the recommended LCD, where do I source one? What are the options

Hi Chris, I obtained an unstarted v0.5 kit from Israel. I then managed to install the LCD upside-down. Desoldering and removal has caused quite a bit of damage to LCD lands and tracks on the UI board. What options are open to me? Are there any v0.5 UI kit boards available on their own? Or even a v0.6 if it will still work?

Can I order just the U1 board from the surface mounted kit with the LCD? I got both boards together and U1 programmed but the LCD was bad and of course I had soldered it in. Got it out with only two traces ripped up and it is probably salvageable but.

I see that you are no longer offering the LCD as a part. Is it still included in the full kit? Also is there a simple way to determine what if any mods apply to the current kit?

Yes, two boards (UI and RF) with all SMD parts installed in the factory – by pick and place machine, then wave soldering. Also in the kit a LCD plus two plastic bags with extra parts – mostly through hole that you need to solder.

I have the boards from a former order from you and the display from ebay. I have read that you are out of boards and display. Does this mean you could send a full kit minus boards and displays? If yes, I would be interested to get one full-kit-minus-boards-and-display at a somewhat reduced price.

If you have any kits available please send it (since I have already paid for the international shipping, but if not, please refund the shipping and I will try to get one when you have more available (can you please place me on the “list” to get one in the future ?

I just ordered your complete mcHF kit with international shipping but it seems that you have already sold out of the radio’s, but I did successfully pay for the shipping.

You are not supposed to solder a header socket for the LCD, it is not part of the BOM and has never been. In theory you can solder one, keep in mind those are very expensive due to the non standard pitch, also your UI board will no longer fit in the 3D case. But if you make your own case, then you can use it. Soon i will list some RF packs only for sale. Check my page from time to time (also i post on Twitter).

I have ordered UI Board Kit and RF PCB several minutes ago. I’m surprised about the wonderful project and hope to read something about new features in future.

Hi, you can probably use different LCD, but will not match the UI board and the front panel. In theory you can add any LCD with QVGA resolution and similar size, and just update the LCD driver to support it. If you want it just as it is, please wait maybe another week, i will have the LCDs back in stock. 73

Dear sir, I’m new in the ham biz. Your project seems to beawesome and Exactly what I’m looking for as an underbudget beginner. I’d like to know if these 3 parts (2 pcb’s and a lcd) are all I need to build the transceiver? Is there a full kit available with the exact instructions?

You can order directly from China, np. Make sure you move the jumper before soldering the LCD to the UI board(need 16 bit mode). I do embedded development and Reverse Engineering for a living.

Just orderred for RF PCB + UI PCB + HY28B LCD. My PayPal transaction # 6KP04308DP576410H dated Dec 15, 2014. I can source for UI, but can you suggest where I can get RF PCB components from a single source or do you supply? Thank you

For soldering iron i use ERSA i-con nano, as for hot air, look on ebay for cheap Chinese ones – any that allow temperature and flow regulation with LCD will do.

I am a ham radio operator from India. I would like to get two sets of PCBS and LCD displays. Is it possible for you to send to me by courier ( FedEx or similar so that speedy delivery is possible)

I have read that by carefully selecting the mixer switching chips it is possible to achieve 50 and 70 Mhz. This will also require the more expensive SI570 versions that can go higher than 160 Mhz. From software point of view this is 10 mins coding, but for VHF you need much better front end, pre-amps, filtering, etc. Also i see in KX3 they push the same final for 50 Mhz as well, but not sure how efficient is the whole thing in 1-50 Mhz range, requires real knowledge in analogue design to make this.

As per today both boards and the LCD are available I just ordered the three items using PayPal for payment. If PayPal does not dieplay my adress please respond to my email adress!

arailabiltxy of boards: what a pity, now th UI board and LCD are available but the RF board is sold out! As the shipping costs to the outside of the UK is so high I waited for teh order of the RF board which was avaliable — last week? Now I can order the other baord and esseantila LCD but without the RF board the Transceiver is not complete. Is there a Chance when all three baords are avaliable at the same time???

Yes, i have some UI boards now, probably will update the site tomorrow as i am waiting for DHL to bring some LCDs as well. Those are the HY28B – dual interface version. The latest mcHF firmware supports all the three versions manufactured by hotmcu.com.

If HY28A is detected on boot up, the SPI is used, if HY28B – the parallel is in use. There is no change of the location of the 16 bit parallel port pins on the three different LCD modules.

I really like the idea of a kit (may be only the “hard to get” components) and suggest to introduce a list for people who want to buy a complete set of pcb´s / LCD and/or kits.

Soon will be available on the Order page, but limited quantity, based on what i have prepared already for sending, to prevent long wait, like the last two weeks.

A year after it was first announced, the Raspberry Pi touch display finally launched on Tuesday. The new component means Raspberry Pi hackers can now experiment with an officially sanctioned 7-inch, 800-by-480, 10-point multi-touch LCD display for their Pi projects.

The connection between the Pi and the driver board relies on the DSI interface leaving the Pi’s HDMI port free to power a second display. You can read all about the display adapter decisions on the Raspberry Pi Foundation’s blog.

When you first get it, the display will also require a bit of assembly since the driver board and a few cables need to be connected to the display first. Future versions of the touchscreen will come already assembled.