tft display interfacing with microcontroller in stock

The ST7789 TFT is a color display that uses SPI protocol. This display is an IPS display, it comes in different sizes (1.3″, 1.54″ …) but all of them should have the same resolution of 240×240 pixel.

The ST7789 display module shown in project circuit diagram has 7 pins: (from right to left): GND (ground), VCC, SCL (serial clock), SDA (serial data), RES (reset), DC (or D/C: data/command) and BLK (back light).

The ST7789 TFT display works with 3.3V only (power supply and control lines). The display module is supplied with 3.3V that comes from the AMS1117 3V3 voltage regulator, this regulator steps down the 5V into 3.3V (supplies the display controller with regulated 3V3).

To connect the PIC18F46K22 with the display module, I used voltage divider for each line. This means there are 4 voltage dividers. Each voltage divider consists of 2.2k and 3.3k resistors, this drops the 5V into 3V which is sufficient.

If the display module has a CS pin (Chip Select) then it should be connected to the PIC18F46K22 microcontroller through another voltage divider (for example connecting it to pin RD2).

In this project SPI1 module is used with SCK1 on pin RC3 (#18) and SDO1 (MOSI) on pin RC5 (#24). SCK1 and SDO1 pins of the PIC18F46K22 MCU are respectively connected to SCL and SDA pins of the ST7789 display module.

The default connection setting of the mikroC ST7789 TFT library is hardware SPI1 module (SPI1 module must be initialized before initiating the display). Instead of hardware SPI1 module, software SPI or hardware SPI2 module can be used.

If TFT data pin (TFT_DIN) and clock pin (TFT_SCK) are defined in the main code (before #include “ST7789.c”) then the library will automatically use software SPI.

If the display module has a CS pin uncomment its related lines (#define TFT_CS and #define TFT_CS_DIR) and connect it to RD2 pin of the microcontroller through voltage divider.

I have a small 3.5 in TFT LCD display from a Chinese manufacturer. It doesn"t have an integrated LCD controller. The documentation claims it is a "16 bit RGB/parallel interface" and it uses a Renesas R61581B0 driver chip.

These types of displays are very common and cheap. They sell for less than $15 a pop on Alibaba.com, but I don"t really have a high esteem for these manufacturers since they do not provide any good / consistent documentation, and their English is riddled with mistakes! But I did get the display, and the product looks and feels like it will do the job!

My question now is, how do I get started ? I have looked on the internet and cannot find a good starting point. I have a 32MHz microcontroller in mind, but I am stumped on how to interface it with the LCD.

Most display projects online that I"ve seen assume that the LCD module comes with an integrated controller , so the MCU"s job becomes pretty simple.. Provide image updates when necessary, and the controller will do the job of refreshing the LCD module at the required 60hz (or so)

This LCD module that I have has raw data lanes that I need to drive myself at 60hz. Are there any good documents on how to interface an MCU directly with such an LCD module?

I"ll be happy with any info that points me in the right direction, whether it be an answer on stackexchange or a reference to any good documentation online.

Before I start, I want to mention that I did not write this code. This is a PORT from the mcufriend’s arduino code, which can be found HERE. I merely made some changes, so that it can be used with the CubeMx with a little modifications.

Now comes the part for setting up the Pins for the display. As, we are using the parallel connection, there are 8 DATA Pins and 5 CONTROL Pins. It would be really easy, if you connect all the data pins to thesame PORTand in the same order.

According to the Setup, the LCD_D2 is connected to the PA15. So if I want to write the DATA to the LCD_D2 pin, first I will select the 2nd bit of the data (d & (1<<2)), and than shift this by 13 using <<13. This will be like adding 2 with 13 to make a total of 15, and that’s where the LCD_D2 is connected to.

Upgrading the user interface of a small, microcontroller-based device such as a remote control, wearable or meter can be achieved cost-effectively using skillful management of hardware resources, and careful attention to software design. This can help pressurised designers to keep costs down while setting the bar higher in terms of performance and features.Understanding the interactions between the MCU and TFT-LCD can help engineers achieve an optimal trade-off between factors such as MCU power and performance, screen resolution and size, refresh rate, colour depth, and BOM cost.

There are various Kinetis parts with FlexBus that are very efficient with TFTs based on controllers with parallel mode. If highest efficiency is not needed any Kinetis can also bit-bang parallel mode.

Any Kinetis can be used for SPI, I2C or UART connected TFT display with controllers offering these interfaces (or a Kinetis with USB can use a USB device one).

The following FTDI display is quite popular for SPI connected devices, based on a controller with graphic accelerator chip which allows simple control and videos etc.(with touch screen control) for simple Kinetis parts.

Agree with the advantage of pcb support - however what"s, "one day there" @ ebay may not prove the case when you (later) return! And - rarely do best/brightest displays (and tech support teams) wade ebay waters...

Figures of merit for displays include; Contrast, Viewing Angle, Backlight brightness & presence/absence of Controller and/or "semi-standard" connector interface.

This post shows how to connect ST7735S TFT display to PIC18F4550 microcontroller and display different things (numbers, text, lines, circles …..). The compiler used is CCS PIC C.

To interface PIC18F4550 with the ST7735 TFT display we need a small library (driver) which can be downloaded from its original post at the following url:

The system power supply is 5V and if you are using a microcontroller TFT display of 3.3V remove all the 1K resistors (5 resistors) from the circuit and connect the TFT display directly to the microcontroller.

The display is a critical component in every project, impacting the case, firmware, electrical design, user interface, and even battery life. For these reasons, and because it is the most visible component of your product, it must be approved by the mechanical design team, management and marketing.Before these teams can approve, they need to see it in action. But it can take days or weeks to connect a display to your platform, initialize it and build a code library able to create believable demonstrations. Meanwhile, the whole project is on hold.Our 8051 development kit / demonstration board can solve this problem. Use it to get the display seen, demonstrated and approved for your project.

ER-DBT032-3 is a microcontroller 8051(80C51) demonstration and development kit for ER-TFT032-3.1 product that is 3.2 inch tft lcd display with ILI9341 controller.The kit includes MCU board controlled by STC12LE5A60S2,ISP(In System Programming) with USB port and cable to customize the demonstration that includes your own bitmap images,personalized fonts,symbols,icons and burn sketches,microSD card that is written graphic and text into it,the power adaptor,the adaptor board with various pitch dimension used to connect MCU board and display.Optional for 8080 8-bit,8080 16-bit parallel interface and 3-wire,4-wire serial interface.

ER-TFTM070-7 is 800x480 Pixels 7 inch color tft lcd display module with LT7683 controller board,superior display quality and easily controlled by MCU such as 8051, PIC, AVR, ARDUINO, and ARM .It can be used in any embedded systems,industrial device,security and hand-held equipment which requires display in high quality and colorful image.

It supports 8080 6800 8-bit,16-bit parallel,3-wire,4-wire,I2C serial spi interface.Built-in MicroSD card slot.It"s optional for resistive touch panel and controller XPT2046,capacitive touch panel and controller FT5316, flash chip and microsd card. We offer two types connection,one is pinheader and the another is ZIF connector with flat cable mounting on board by default and suggested.

It"s optional for flash chip and microsd card. We offer two types connection,one is pin header and the another is ZIF connector with flat cable mounting on board by default and suggested.

Of course, we wouldn"t just leave you with a datasheet and a "good luck!" We prepared the interfacing documents,libraries and examples for arduino due,mega 2560,uno,For 8051 microcontroller user,we also prepared the interfacing document and demo code.