stm32f4 tft lcd example manufacturer

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.

The LCD I am using is a 2.8″ TFT LCD with SPI communication. I also have another 16-bit Parallel TFT LCD but it will be another story for another time. For this post, let’s focus on how to display what you want on the 2.8″ LCD. You can find all details about this LCD from this page:http://www.lcdwiki.com/2.8inch_SPI_Module_ILI9341_SKU:MSP2807

First thing first, this LCD use SPI as the main communication protocol with your MCU. For STM32 users, HAL Library has already implemented this protocol which makes this project easier for us. But, a little knowledge about this protocol does not hurt anyone. SPI is short for Serial Peripheral Interface which, aside from two data lines, also has a clock line and select lines to choose between devices you want to communicate with.

This LCD uses ILI9341 as a single-chip SOC driver for a display with a resolution of 240×320. More details can be found in the official document of ILI9341. But the most important thing is that we have to establish astart sequencein order for this LCD to work. The “start sequence” includes many other sequences which are also defined in the datasheet. Each sequence starts when you send a command to ILI9341 and then some parameters to follow up. This sequence is applied for all communication between MCU and ILI9341.

For this project, I recommend using theSystem Workbench for STM32for coding and building the code. After installing and open the program, go to the source code you have just downloaded and double click the.cprojectfile. It will automatically be open in your IDE. Then build the program by right click on the folder you just open (TFTLCD) and chooseBuild Project. Wait for it to finish and upload it to the board by right clicking the folder, choose Run As and then clickAc6 STM32C/C++ Application. And that’s it for running the example.

The most important library for this project is obviously the ILI9341_Driver. This driver is built from the provided source code in the lcdwiki.com page. I only choose the part that we need to use the most in many applications like writing string, displaying image and drawing symbols. Another library from the wiki page is the TOUCH library. Most of the libraries I got from the Internet were not working properly due to some adjustments to the original one.

To draw symbols or even display images, we need a “byte array” of that image or symbol. As an illustration, to display an image from a game called Transistor, I have a “byte array” of that image stored in a file named transistor.h. You can find this file in the link below. Then, I draw each pixel from the image to the LCD by adding the code in the Display_Picture() function in the Display folder.void Display_Picture()

The above example is just only for displaying black and white image. In order to show a color image, we need to a little bit different. First, go tothis websiteto generate the array of the colour image. Remember to change your size to 320×240 and choose the 65K color option. Because it now takes up two bytes for one pixel, we need to send two bytes at once. You can check the Display_Color_Picture() function in the Display folder.void Display_Color_Picture()

It’s time to write about a more complex but interesting connection with the STM32F4-Discovery board. Since I started developing with electronics, I’ve found a lot of applications in which an LCD is needed or can be an added value, specially if it includes a Touchscreen.

Last week I received a 3.2″ TFT LCD with Touchscreen from waveshare, model HY32D. It is based on SSD1289 display controller and also includes a touchscreen interface based on XPT2046 which communicates over SPI link. With a QVGAresolution (320×240 pixels) is enough for many applications and, more important, it is very affordable.

Well, fortunately Waveshare(LCD module supplier) includes some code to drive different kinds of displays and touchscreens. On Waveshare module’s page there is also a very helpful table that indicates the pinout (also the module itself has named pins on bottom side) that helps wiring to the board. Basically I have connected in this way:

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:

LVDS displays can vary a lot. LVDS displays are not governed by a set of well defined rules like MIPI DSI displays are. Therefore, it is up to the LCD manufacturer and the LVDS display driver IC manufacturer to use LVDS interface as they please, as long as they follow the physical interface and logic levels.

Based on this data, we can pick an LVDS transmitter IC. SN75LVDS84 from Texas Instruments is great for use with LCD displays that can be driven by an STM32.

I"ve written some code to make a FSMC connection between my STM32F407VET6 and a TFT LCD 240x320 pixels. I was checking this several times, however I can"t recognize what"s wrong.

I"m using 16-bit data bus with FSMC_NE1, FSMC_A16, FSMC_NWE, FSMC_NOE. I"ve connected PE6 pin which is FSMC_A22 in FSMC interface. Now I"m wondering weather it can work with such configuration (I mean PE6 pin). All I get is white screen on my LCD as it is in RESET state.

I have realized that my TFT module that incorporates an ILI9341 controller, is only avaliable for 16bit interface (probably configured by hardware). So I tried to use the HAL library provided by ardnew https://github.com/ardnew/ILI9341-STM32-HAL, but is only compatible with SPI interface. I want to know if there is some code for this config of microcontroller and TFT module.

Also I dont know if the 16bit parallel interface is I or II, because there is no information about this. The module board have a description "TFT_320QDT_9341".

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Here we take a single-story scenario of a high-end office building as an example. The robot needs to serve the office workers in the building at regular intervals, and the task requires the robot to sense the environment and its own motion state through intrinsic or extrinsic sensors and perform collision-free motion from the robot’s current location to the target location according to the principles of optimal time, shortest path, or lowest energy consumption.

In order to enable the controller to remotely access the robot status and give control commands from the control center, I used the STM32F407 mainboard to interact with the robot through an external network card and the stone STVC043WT-01 display for UI design in the demo to improve the efficiency of the operator’s use, the schematic diagram of the design is as follows:

//Second, for the serial port number greater than 9 (for example, COM12), the serial port name in the CreateFile() function should be written "\. \COM12"。

One of my favorite features of the STM32F429 discovery board is the TFT-LCD display. After setting up the programming IDE I started looking at the code examples given by ST. One code example caught my eye: The "LTDC_Display_2Layers" project.

I imported the project as explained in my STM32F4 Tutorial and modified the code so that instead of the two ST logos moving around on the screen, a jumping monoclecat is displayed. When you press the "USER" button, the cat jumps higher.