tft display for stm32f4 supplier

A1: We have the integrated system for industrial parts quality control. We have IQC (incoming quality control), IPQCS (in process quality control section), FQC (final quality control) and OQC (out-going quality control) to control each process of industrial parts prodution.

A4:Generally speaking, it will take us 15 working days for machining parts and 25 working days for stamping parts products. But we will shorten our lead time as soon as possible according to customers" demands.

You can refer to the examples under STM32CubeF4 package to see their structure and get inspired from them to configure your files: STM32Cube_FW_F4_V1.21.0\Projects\STM32F429I-Discovery\Applications\STemWin

Reduce the TFT GUI development time considerably with mikroC, mikroBasic or mikroPascal for ARM and mikromedia Plus for STM32 board. Buy this kit and save money.

STM32F429 has also LTDC driver for LCD like that, but this driver we will use later. For now we will use SPI for driving in serial mode and some other pins for controlling.

Remember: This library can also be used, if you are not using STM32F429 Discovery. It can be used in previous STM32F4 Discovery board. All pins can be changed in defines.h file which is included in project.

Ahh yeah look at that! If you look closely, top right of the LCD, that’s obviously a flex connector for a resistive touch overlay (4 contacts running to the 4 sides of the LCD overlay).

Agreed! I will be picking one up. I’ve been happy developing for the stm32f4discovery (and other stm32 chips) with gcc, openocd and gdb. It is all free.

The STM32F4 cores are pretty well supported by libopencm3 and Code Sourcery and summon-arm-toolchain both build working toolchains and openOCD supports the stlink natively now.

If you are looking for a ready-to-use solution, checkout ChibiStudio (from the ChibiOS/RT project), which off curse can also be used without ChibiOS. The windows version is available on ChibiOS website, while a linux version i did packaged some time ago can be found here:

A fair number of inexpensive baseboards/motherboards/accessories have also appeared for earlier versions. I hope Olimex puts out a couple nice STM32F429/427 boards.

I can see there is only a STLINK usb connector on board, so there is even no FS to expect. beside HS, I suppose does mean High Speed (480mbps). but HS anyway needs a separate physical layer USB chip for addition to STM32F4 chip and most likely this is chip is not present on this board anyway, because this is STM32F4+LCD+SDRAM demoboard and there is no need for USB at all.

The data brief bullet-points “USB OTG with micro-AB connector”. Looks like the micro-usb is on the underside, sticking out at the bottom of the photo. With matching T/H mounting tabs on the topside, labelled USB USER. But like you said, the STM32F4 requires an external PHY for HS, and it seems unlikely they’d include one on this board.

I think Farnell’s 21€ will be accurate, as ST’s suggested USD price is $24. The placeholders for the STM32F429I-DISCO on element14 (a division of Farnell) and mouser show $42, which I think predates the later ST announcement. I think the ST announced $24 will hold, and the distributor prices will match that, as they have in the past.

Thanks Jon, Yeah I would want something that was ready made, install and go and as simple and straightforward as possible. I really hate it when you go to get something installed and there’s all sorts of things to learn before you even know which files to download and then find “Oh, it needs XYZ and then you get XYZ and it needs UVW as well and … and so and in the end you give up and go with something else or forget the idea. I like the idea of the Mikro Electronica compilers, as although they aren’t free and aren’t cheap (well they are cheap compared to some!), it looks good and relatively straightforward, offers a choice of languages and some regulars here have indicated it’s pretty good.

You’re just a touch off there, I’m well and truly past Arduino, but yes it’s good for beginners who want to go that way, even if (from what I hear) some of the libraries are so slow and bloated. I just want to get the job done with whatever micro I’m using, not muck around trying to make one thing play nice with another and learn all the innards of the compiler, etc. Unfortuantely many of the offerings don’t come in a simple ‘get the job done with no fuss’ type of package. So for those that want to play around with the toolchain and tinker and don’t mind spending time learning all that instead of getting on with their Micro project, then that’s fine for them, but I want to get the job done, have it run fast enough for the application, be stable, put it out there and ensure it works properly when it’s out there.

I look at this and I think of the new HP Prime, with an ARM9 CPU, currently about $180 US, and I wonder if you’re really getting value for the extra $156. Heck, even a Beaglebone Black is only about $45.

I wouldn’t expect TI to hack profits from their calculator range, and HP have always been expensive, but ST could easily change their format to calculator-friendly. Clamshell design, LCD & battery in top half, CPU & keypad in bottom half, expansion pins to left / right of keypad makes a self contained unit.

You can get the touchpads custom made, but the only places that I know of aren’t at all cheap, though there will no doubt be somebody doing it cheap. I think in most cases people design the keypad on-screen and use the touch panel, though obviously that isn’t ideal for all situations.

It’s certainly useable in any other project where you have an onboard LCD controller. Especially any other project that happens to use a STM32F4. What difference would it have made if it had an external controller? Surely it’d have been on the same PCB. Were you hoping for a removeable SPI-interfaced module?

Look in the UM1670 user manual, paragraph 4.8: the tft includes an ILI9341 controller. The ILI9341 has it’s own graphics ram inside, it is not mapped into the STM32 address space. It is connected to the STM32 via a parallel bus. The ILI9341 and similar controllers are common on cheap chinese tfts. So it is no problem to source similar tfts for your final product after developing on the discovery board.

UM1670 in paragraph 4.8 also says that “The TFT LCD is a 2.41″ display of 262 K colors. Its definition is QVGA (240 x 320 dots) and is directly driven by the STM32F429ZIT6 using the RGB protocol”. ILI9341 has multiple modes of operation including direct RGB/HSYNC/VSYNC mode which bypasses internal GRAM. I don’t have the board yet but I assume display buffer is located in external SDRAM which is also on the board. The whole point of this kit is to show TFT and SDRAM interface in new STM32F4x9.

I’ve checked this discovery board firmware available from ST’s site (“STM32F429 discovery firmware package UM1662” number: STSW-STM32138, btw. finding it is a bit difficult – ST’s site is terrible):

They are using FreeRTOS, FatFs, STemWinLibrary which is ST’s version of Segger’s emWin graphic library and STM32F4xx_StdPeriph_Driver v1.2.1 which includes F429/439 support (FMC, LTDC and DMA2D added).

The license (enforceable or not) basically say it is strictly for evaluation only, which kinda makes sense since at that low price it probably cost them money to sell it

I suppose since it’s got an ST-Link on board, they could enforce that you aren’t allowed to use the ST-Link firmware for anything other than eval, thus by distributing the PCB in a finished product you’d be violating the license. But I think that’s actually also unenforceable too, though. I’m not an IP lawyer, but I think case law is that if you hand someone your iPod, they own all the music on it now too, seems like that applies here.

I suspect that clause is also so they won’t get people raging at them because they integrated the dev board into some commercial product and ST then later discontinues it. That has unfortunately happened a few times in the past.

That’s just dumb. I’m pretty sure you only get design lifecycle guarantees when you sign an order for a few hundred k + parts. Much less when you’re abusing a dev board into an end product.

Check again martin. Those lines have pullups to vdd and are connected to cpu pins. I have this board for some time and I can confirm that lcd is driven by lcd controller from cpu and frame buffer is in external dram which is also on the board.

Well even so that DMA2D stuff is geared towards displays with one address pointer. Try using it with displays with the x& y positions on separate addresses (like x add is 2A and y is 2B with base address of 0x6C000000 for commands and a offset of 4 for data ).. Wish there was and easy way of getting the DMA2D to work with different larger displays like the 640 by 480 of Newhaven’s http://www.newhavendisplay.com/nhd57640480wfctxl-p-2465.html

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I am trying to display a uint32_t value on an LCD display (Waveshare 3.2inch TFT) connected to a STM32F407 evaluation board. The library provided by Waveshare includes a function BSP_LCD_DisplayStringAtLine. I have got this working fine for string output but when I try to send it a uint32_t value it just displays corrupt data on the LCD on the line where the value should print.

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GPIO configuration is done similiar way as in example for SDRAM. But unfortuneatly TFT controller pins are shared in two alternate functions group (9 and 14), so there is third table with AF initialization values.

At this moment easiest way to display antything on LCD is use random content that SDRAM holds after power-up. Go to sdram.c file and comment following lines:

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This LCD panel has a built-in EK9716BB3+EK73002 controller, a 40pin 24-bit RGB Interface, can support All View full viewing angle with IPS technology. It is composed with 10 LEDs connected 2 in parallel and 1 in serial l, with backlight voltage 16.5V/current 20mA and 16:9 aspect ratio. Optional with 4 wire resistive touch panel (RTP) and projected capacitive touch screen (PCAP.). Sharing controller board same hardware with 5” TFT LCD 800x480 resolution and 7” 800x480 resolution.