ILI9341-STM32-NUCLEO-L152RE

Minimal library/driver for TFT LCD Display Shield with an ILI9341 controller. Developed on STM32 Nucleo-64 development board (STM32L152RE MCU) using STM32CubeIDE.

Device list

STM32 Nucleo-64 development board with STM32L152RE MCU
2.4 Inch TFT LCD Touch Display Shield
ILI9341 Datasheet

Files

ILI9341.h:

Header file with pin configuration and function declarations. Needs to be included.

#ifndef ILI9341_H
    #define ILI9341_H
    #include "ILI9341.h"
#endif

ILI9341.c:

Source file with implementation of header functions.

AsciiLib.* and HzLib.*:

Helper files that provide character pixel data (not mine).
Each character is represented by [16 rows] x [8 columns] bit matrix stored as an array of 16 2-byte values. Bit 1 turns pixel to the color.
Modify the pixel data as desired.

Functions

Basic Functions:
LCD_Init()	Initializes the LCD. Should be called before any other LCD functions.
LCD_Send_Command(command)	Send LCD Command (see ILI9341 datasheet)
LCD_Send_Data(data)	Send LCD Data (see ILI9341 datasheet)
Helper Functions:
PutChar(x, y, character, textColor, backgroundColor)	writes character with specified colors at position(x,y)
GUI_Text(x, y, line, color, background)	writes the line with specified colors at position (x,y) with wraparound
LCD_SetPoint(x, y, color)	sets pixel at position (x,y) to the specified color

Tips

• After the LCD initialization it is recommended to follow Memory Write flowchart (ILI9341 datasheet page 114)
• The two functions LCD_Send_Command and LCD_Send_Data should be enough to implement your own opimized display write functions.
• Use macros LCD_<ILI9341_control_pin>(bit) to set individual ILI9341 control pins to specified bit. Pins are CSX, RESX, DCX, WRX, RDX.
• To set the data pins use macro LCD_D(x) which sets all D<7:0> pins to the bits of x<7:0>.
• If you modify pin connection, modify the LCD_<LCD_pin> declaration in header file and the appropriate pin numbers in Set_Write_Mode*() functions in the source file.