tft lcd display code mplab price

Improve your product design by adding the DT010ATFT: a small, simple 1” TFT LCD with IPS technology. This mini TFT display is perfect as a status indicator presenting graphic icons or simplified information. The IPS technology included in this display allows your content to be crisp and clear no matter what angle your user is viewing it from. The ST7735S driver IC provides on-chip storage and power system. This IC allows for fewer components and a simple design to easily integrate the DT010ATFT into your next product.

The Microchip PIC32 has the bandwidth to drive QVGA (320x240) or WQVGA (up to 480x272) color LCD display touch panels that are controllerless - all LCD drive requirements are met by the PIC32. Example hardware and software has been developed by Microchip to demonstrate the PIC32s graphics capability. The PIC32 used in the starter kits have sufficient internal RAM (128Kbytes) to support graphics with 8 BPP (bit per pixel) color depth and with an external RAM device 16 BPP is possible. With relatively minor source code revisions and a custom interface board, this project leverages the Microchip developed hardware and software to interface a Newhaven Display International 3.5" QVGA color LCD display touch panel to a PIC32.

Newhaven Display International offers a readily available 3.5" color LCD with touch screen, sans controller. A combination of existing Microchip demonstration boards, the Newhaven LCD and a custom interface board constitute a complete display demonstration project.

The demonstration software shows the capabilities of the PIC32 driving a Newhaven Display International controllerless LCD graphics board. The start up splash screen is a bitmap image. The subsequent screens demonstrate the widgets of the Microchip Graphics Library to show various application screens that can be easily made with Microchip’s Graphics Library. The LCC (Low-Cost Controllerless) Daughterboard can support QVGA, WQVGA, and VGA (with the addition of larger external SRAM) resolutions and anything lower. Also, Microchip makes available a visual design tool to create your own graphical user interface screens for Microchip microcontrollers, the Graphics Display Designer (GDD).

Various hardware combinations can be used to drive the LCD display. At minimum, a PIC32USB Starter Kit II or PIC32 Ethernet Starter Kit (note limitations below) is required, along with an LCC Graphics PICtail™ Daughter Board, a Newhaven display, and the custom interface board (figure 1, below). Optionally, for I/O accessibility, a PIC32 I/O Expansion Board can be connected to the Graphics PICtail™ Plus Daughter Board (figure 2, below).

NHD-3.5-320240MF-PICADAPTER-ND, (interface adapter board between Low-Cost Controllerless (LCC) Graphics PICtail™ Plus Daughter Board and the Newhaven display).

DKSB1014B-ND is now available from Digi-Key, uniting display NHD-3.5-320240MF-ATXL#-T-1-ND with interface adapter board NHD-3.5-320240MF-PICADAPTER-ND.

The PICtail Plus board provides a row of header pins with jumpers (schematic in AN1387). The jumpers are positioned to use internal memory (memory residing in the PIC32 device) or external memory residing on the PICtail Plus Daughter board, and the color depth 8 BPP or 16 BPP. The desired memory use and color depth in software and hardware must match. If there is a mismatch between the software selection and hardware selection images will not display properly.

To use internal memory and 8 BPP color depth all jumpers on the LCC Graphics PICtail Plus Daughterboard must be installed across rows 1 and 2 (Figure 3) and for external memory and 16 BPP install all jumpers across rows 2 and 3 (Figure 4). Associated code changes (reference Software Requirements, Source file and code changes) are noted next to the jumper settings in Figures 3 and 4.

By default the Microchip PIC32 LCC - Object Layer Demo software drives the Powertip 4.3" WVGA display and by commenting/uncommenting select lines of source code the software will drive the Truly 3.2" QVGA display. Several new and revised source files are required to successfully drive the Newhaven 3.5" QVGA display. The software is meant to be used with the Microchip Graphics Library version 3.00.

Complete project LCC - NHD Object Layer Demo_072211.zip (2.2 MB) includes all revised files (this is an MPLAB X project]. By default, the project files are set for 16 BPP color and hardware jumpers must be set for external memory.

Select hardware header file appropriate for glass and internal or external memory - “…NHD_INT…h” for internal memory, “…NHD_EXT…h” for external memory. The code snippet below will include the header file that defines the use of the Newhaven display and external non-volatile memory.

For reference, the file folders “…\LCC - NHD Object Layer Demo_072211\Newhaven_files\8_BPP” and “…\LCC - NHD Object Layer Demo_072211\Newhaven_files\16_BPP” is provided with modified source files for 8 BPP or 16 BPP color. Code is uncommented/commented as needed to support 8 or 16BPP color depth.

It is left to the reader to install and familiarize themselves with MPLAB X IDE, the XC32 compiler, and hardware connections from/to the PIC32 starter kit of choice.

Expand/copy zip file LCC - NHD Object Layer Demo_072211.zip (2.2 MB) to desired system location. Open MPLAB X IDE, connect the hardware to your computer, and open project “GOLDemo PIC32 NHD”. Open the project properties to verify hardware and software tool selection matches your installation. Make and Program device.

AN1368 “Developing Embedded Graphics Applications using PIC(r) Microcontrollers with Integrated Graphics Controller”. This application note delves into using PIC devices with an integrated graphics controller, but it also provides background information on basic color science, display terminology, display power sequencing, and resistive touch screens.

The ILI9341 TFT module contains a display controller with the same name: ILI9341. It’s a color display that uses SPI interface protocol and requires 4 or 5 control pins, it’s low cost and easy to use.

The resolution of this TFT display is 240 x 320 pixel which means it has total of 76800 pixels. This module works with 3.3V only and it doesn’t support 5V (not 5V tolerant).

The ILI9341 TFT display board which is shown in project circuit diagram has 14 pins, the first 9 pins are for the display and the other 5 pins are for the touch module.

So, the display pins are numbered from 1 to 9 (from left to right): VCC (5V), GND (ground), CS (chip select), RST (reset), DC (or D/C: data/command), MOSI (or SDI), SCK (clock), BL (back light LED) and MISO (or SDO).

As mentioned above, the ILI9341 TFT display controller works with 3.3V only (power supply and control lines). The display module is supplied with 5V where GND pin is connected to circuit ground, VCC and BL pins are connected to circuit +5V. This module has a built-in 3.3V regulator which supplies the display controller with 3.3V from the 5V source.

All PIC18F46K22 MCU output pins are 5V, connecting a 5V pin directly to the ILI9341 display board may damage its controller circuit. To avoid that, I used voltage divider for each line which means there are 5 voltage dividers. Each voltage divider consists of 2.2k and 3.3k resistors, this drops the 5V into 3V which is sufficient.

Interfacing PIC18F46K22 MCU with ILI9341 TFT display C code:The following C code is for mikroC PRO for PIC compiler, it was tested with version 7.6.0.

The default connection setting of the mikroC ILI9341 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_SDI) and clock pin (TFT_SCK) are defined in the main code (before #include “ILI9341.c”) then the library will automatically use software SPI.

As mentioned above, the ILI9341 TFT is connected to PIC18F46K22 microcontroller SPI1 module pins (SCK1 and SDO1). Hardware SPI1 module and the ILI9341 TFT display are initialized as:

In this tutorial we will see How to Interface a 16×2 character LCD module with PIC 16F877A Microcontroller using MPLAB X IDE and MPLAB XC8 C Compiler. 16×2 Character LCD is a very basic and low cost LCD module which is commonly used in electronic products and projects. 16×2 means it contains 2 rows that can display 16 characters. Its other variants such as 16×1 and 16×4 are also available in the market. In these displays, each character is displayed using 5×8 or 5×10 dot matrix.

For controlling LCD using MPLAB XC8 compiler we need to know the hardware of LCD. These LCDs commonly uses HD44780 compliant controllers. So we need to learn HD44780 Dot Matrix LCD Controller Datasheet. Don’t worry we already developed an LCD library including commonly used functions, so you can use it without any hardware knowledge of LCD.

First two pins GND and VCC (VSS and VDD) are for providing power to LCD display. 3ed pin VEE is used to control the contrast of the LCD display. A 10KΩ preset whose fixed ends connected to VDD, VSS and variable end connected to VEE can be used to control contrast of the LCD. A microcontroller or microprocessor need to send 2 types of information for operating this LCD Module, Data Information and Command Information. Data Information is the ASCII value of the characters to be displayed in the LCD screen and Command Information determines other operations such as position to be displayed, clear screen, shift etc. Data and Command Information are send to LCD through same data lines (DB0 – DB7) which are multiplexed using RS (Register Select) pin of LCD. When RS is HIGH LCD treats DB0 – DB7 data pins information as Data to be displayed and when it is LOW LCD treats it as Command Information. Enable (E) input of the LCD is used to give Data Strobe. HIGH (5V) Voltage Level in the Enable (E) pin tells the LCD that DB0 – DB7 contains valid information. The input signal R/W (Read or Write) determines whether data is written to or read from the LCD. In normal cases we need only writing hence it is tied to GROUND in circuit shown below.

The interface between this LCD and Microcontroller can be 8 bit or 4 bit and the difference between them is in how the data or commands are send to LCD. In the 8 bit mode, 8 bit data and commands are send through the data lines DB0 – DB7 and data strobe is given through E input of the LCD. But 4 bit mode uses only 4 data lines. In this 8 bit data and commands are splitted into 2 parts (4 bits each) and are sent sequentially through data lines DB4 – DB7 with its own data strobe through E input. The idea of 4 bit communication is introduced to save pins of a microcontroller. You may think that 4 bit mode will be slower than 8 bit. But the speed difference is only minimal. As LCDs are slow speed devices, the tiny speed difference between these modes is not significant. Just remember that microcontroller is operating at high speed in the range of MHz and we are viewing LCD with our eyes. Due to Persistence of Vision of our eyes we will not even feel the speed difference.

Hope that you got rough idea about how this LCD Module works. Actually you need to read the datasheet of HD44780 LCD driver used in this LCD Module to write a MPLAB XC8 program for PIC. But we solved this problem by creating a header file lcd.h which includes all the commonly used functions using 4 bit mode. Just include it and enjoy.

Lcd_Set_Cursor(int row, int column) : This function is used to set row and column of the cursor on the LCD screen. By using this function we can change the position of the character or string displayed by following functions.

sprintf() can be used to write formatted string to a variable. It can be used with this LCD library to format displayed texts. This enables us to display integers and floating point numbers on the LCD very easily. You should include the header file stdio.h for using sprintf().

MPLAB® Harmony 3 is an extension of the MPLAB® ecosystem for creating embedded firmware solutions for Microchip 32-bit SAM and PIC® microcontroller and microprocessor devices. Refer to the following links for more information:

This repository contains the MPLAB® Harmony Graphics Suite. The suite supports a free fast to market, graphics software development environment for Microchip MPLAB® 32-bit SAM and PIC® microprocessor devices. Refer to the following graphics links for release notes, home page, training materials, framework and application help. Graphics application examples can be found at various device-family specific repositories and at MPLAB® Discover

Blank Library Interface - the library interface which easily allows a third-party graphics library direct access to the display framebuffer. Blank library applications are available at various device-family specific repositories. ***

The SAMA5D27-70-CTP is a fast prototyping and evaluation platform for the SAMA5D2 based System in Packages (SiPs) and the SAMA5D27-SOM1 (SAMA5D27 System On Module)plus a 7inch 800x480 with PCAP display. The kit comprises a baseboard with a soldered ATSAMA5D27-SOM1 module. The module features an ATSAMA5D27C-D1G-CU SIP embedding a 1-Gbit (128 MB) DDR2 DRAM. The SOM integrates a Power Management IC (PMIC), a QSPI memory, a 10/100 Mbps Ethernet PHY and a serial EEPROM with a MAC address. 128 GPIO pins are provided by the SOM for general use in the system. The board features a wide range of peripherals, as well as a user interface and expansion options, including two mikroBUS™ click interface headers to support MikroElektronika click boards™ and one PMOD™ interface. Linux distribution and software package allows you to easily get started with your development.