LCD_McuFriend_FSMC_STM32F407 - 3.5" inch TFT LCD Display Module 480X320 driven w…

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Zoltan Hudak / Mbed OS LCD_McuFriend_FSMC_STM32F407

3.5" inch TFT LCD Display Module 480X320 driven with FSMC.

TFT LCD Display Module 480X320 driven with FSMC

I have recently bought a 3.5" inch TFT LCD Touch Screen Display Module 480X320 with a www.mcufriend.com label on the back side. The display was equipped with an 8bit parallel interface. First I decided to test it with the UniGraphic library using the BUS_8 protocol. The display was very slow but improved when I switched to the PAR_8 protocol. Because I heard about the possibility to use a Flexible Static Memory Controller (FSMC), built into some STM MCU's, to drive LCD's (read/write to LCD's memory rather than to an external SRAM) I thought it would be a fun to try it out.

Below is the brief story of what I did:

Created a project for my STM32F407VE board in the STM32CubeIDE
Set the Clock Configuration to match the one used by Mbed for the Seeed Arch Max board:

Selected FSMC in the Connectivity category and configured it as below:
Let the STM32CubeIDE generate the code (files).
Created a new program for the Seeed Arch Max target in the Mbed Online Compiler by selecting a mbed os blinky template.
Replaced the main.cpp with the main.c content of the STM32CubeIDE project.
Copy & Pasted the other files with codes from the STM32CubeIDE project to the online compiler project.
Renamed and modified:
"stm32f4xx_it.h" to "stm32f4xx_it_msp.h"
"stm32f4xx_it.c" to "stm32f4xx_it_msp.c"
Added the UniGraphic library to the online compiler project.
Extended the UniGraphic library with a FSMC_8 protocol and replaced the TFT::set_orientation(int orient) function with the one used by mcufriend for arduino.
Modified the main.cpp as needed.

Wiring

STM32F407VE	TFT LCD module
+3.3V	3V3
GND	GND
PB_12	LCD_RST
GND	LCD_CS
PD_13 (RS)	LCD_RS
PD_5 (WR)	LCD_WR
PD_4 (RD)	LCD_RD
PD_14 (DB00)	LCD_D0
PD_15 (DB01)	LCD_D1
PD_0 (DB02)	LCD_D2
PD_1 (DB03)	LCD_D3
PE_7 (DB04)	LCD_D4
PE_8 (DB05)	LCD_D5
PE_9 (DB06)	LCD_D6
PE_10 (DB07)	LCD_D7

Results

	Execution times
Used protocol	BUS_8	FSMC_8
Operation \ Time	ms	ms
Clear	2283.980	38.454
Plot	192.066	11.365
8bit BMP	63.805	41.338
Large Font	163.872	7.895
Sparce pixels	2072.265/1458.051	74.107/52.168
16bit BMP	2288.589	59.904

UniGraphic/Graphics/TextDisplay.h@1:47c996032a9e, 2020-09-25 (annotated)

Committer:: hudakz
Date:: Fri Sep 25 14:52:27 2020 +0000
Revision:: 1:47c996032a9e
Parent:: 0:fa952828e34c

3.5" inch TFT LCD Display Module 480X320 driven with FSMC.

Who changed what in which revision?

User	Revision	Line number	New contents of line
hudakz	0:fa952828e34c	1	/* mbed TextDisplay Library Base Class
hudakz	0:fa952828e34c	2	* Copyright (c) 2007-2009 sford
hudakz	0:fa952828e34c	3	* Released under the MIT License: http://mbed.org/license/mit
hudakz	0:fa952828e34c	4	*
hudakz	0:fa952828e34c	5	* A common base class for Text displays
hudakz	0:fa952828e34c	6	* To port a new display, derive from this class and implement
hudakz	0:fa952828e34c	7	* the constructor (setup the display), character (put a character
hudakz	0:fa952828e34c	8	* at a location), rows and columns (number of rows/cols) functions.
hudakz	0:fa952828e34c	9	* Everything else (locate, printf, putc, cls) will come for free
hudakz	0:fa952828e34c	10	*
hudakz	0:fa952828e34c	11	* The model is the display will wrap at the right and bottom, so you can
hudakz	0:fa952828e34c	12	* keep writing and will always get valid characters. The location is
hudakz	0:fa952828e34c	13	* maintained internally to the class to make this easy
hudakz	0:fa952828e34c	14	*/
hudakz	0:fa952828e34c	15
hudakz	0:fa952828e34c	16	#ifndef MBED_TEXTDISPLAY_H
hudakz	0:fa952828e34c	17	#define MBED_TEXTDISPLAY_H
hudakz	0:fa952828e34c	18
hudakz	0:fa952828e34c	19	#include "mbed.h"
hudakz	1:47c996032a9e	20	#include "Stream.h"
hudakz	0:fa952828e34c	21
hudakz	0:fa952828e34c	22	/** A common base class for Text displays
hudakz	0:fa952828e34c	23	*/
hudakz	0:fa952828e34c	24	class TextDisplay : public Stream {
hudakz	0:fa952828e34c	25	public:
hudakz	0:fa952828e34c	26
hudakz	0:fa952828e34c	27	// functions needing implementation in derived implementation class
hudakz	0:fa952828e34c	28	// ----------------------------------------------------------------
hudakz	0:fa952828e34c	29	/** Create a TextDisplay interface
hudakz	0:fa952828e34c	30	* @param name The name used in the path to access the strean through the filesystem
hudakz	0:fa952828e34c	31	*/
hudakz	0:fa952828e34c	32	TextDisplay(const char *name = NULL);
hudakz	0:fa952828e34c	33
hudakz	0:fa952828e34c	34	/** output a character at the given position
hudakz	0:fa952828e34c	35	*
hudakz	0:fa952828e34c	36	* @param column column where charater must be written
hudakz	0:fa952828e34c	37	* @param row where character must be written
hudakz	0:fa952828e34c	38	* @param c the character to be written to the TextDisplay
hudakz	0:fa952828e34c	39	* @note this method may be overridden in a derived class.
hudakz	0:fa952828e34c	40	*/
hudakz	0:fa952828e34c	41	virtual void character(int column, int row, int c) = 0;
hudakz	0:fa952828e34c	42
hudakz	0:fa952828e34c	43	/** return number of rows on TextDisplay
hudakz	0:fa952828e34c	44	* @result number of rows
hudakz	0:fa952828e34c	45	* @note this method must be supported in the derived class.
hudakz	0:fa952828e34c	46	*/
hudakz	0:fa952828e34c	47	virtual int rows() = 0;
hudakz	0:fa952828e34c	48
hudakz	0:fa952828e34c	49	/** return number of columns on TextDisplay
hudakz	0:fa952828e34c	50	* @result number of columns
hudakz	0:fa952828e34c	51	* @note this method must be supported in the derived class.
hudakz	0:fa952828e34c	52	*/
hudakz	0:fa952828e34c	53	virtual int columns() = 0;
hudakz	0:fa952828e34c	54
hudakz	0:fa952828e34c	55	// functions that come for free, but can be overwritten
hudakz	0:fa952828e34c	56	// ----------------------------------------------------
hudakz	0:fa952828e34c	57	/** redirect output from a stream (stoud, sterr) to display
hudakz	0:fa952828e34c	58	* @param stream stream that shall be redirected to the TextDisplay
hudakz	0:fa952828e34c	59	* @note this method may be overridden in a derived class.
hudakz	0:fa952828e34c	60	* @returns true if the claim succeeded.
hudakz	0:fa952828e34c	61	*/
hudakz	0:fa952828e34c	62	virtual bool claim (FILE *stream);
hudakz	0:fa952828e34c	63
hudakz	0:fa952828e34c	64	/** clear the entire screen
hudakz	0:fa952828e34c	65	* @note this method may be overridden in a derived class.
hudakz	0:fa952828e34c	66	*/
hudakz	0:fa952828e34c	67	virtual void cls();
hudakz	0:fa952828e34c	68
hudakz	0:fa952828e34c	69	/** locate the cursor at a character position.
hudakz	0:fa952828e34c	70	* Based on the currently active font, locate the cursor on screen.
hudakz	0:fa952828e34c	71	* @note this method may be overridden in a derived class.
hudakz	0:fa952828e34c	72	* @param column is the horizontal offset from the left side.
hudakz	0:fa952828e34c	73	* @param row is the vertical offset from the top.
hudakz	0:fa952828e34c	74	*/
hudakz	0:fa952828e34c	75	virtual void locate(int column, int row);
hudakz	0:fa952828e34c	76
hudakz	0:fa952828e34c	77	/** set the foreground color
hudakz	0:fa952828e34c	78	* @note this method may be overridden in a derived class.
hudakz	0:fa952828e34c	79	* @param color is color to use for foreground drawing.
hudakz	0:fa952828e34c	80	*/
hudakz	0:fa952828e34c	81	virtual void foreground(uint16_t colour);
hudakz	0:fa952828e34c	82
hudakz	0:fa952828e34c	83	/** set the background color
hudakz	0:fa952828e34c	84	* @note this method may be overridden in a derived class.
hudakz	0:fa952828e34c	85	* @param color is color to use for background drawing.
hudakz	0:fa952828e34c	86	*/
hudakz	0:fa952828e34c	87	virtual void background(uint16_t colour);
hudakz	0:fa952828e34c	88
hudakz	0:fa952828e34c	89	// putc (from Stream)
hudakz	0:fa952828e34c	90	// printf (from Stream)
hudakz	0:fa952828e34c	91
hudakz	0:fa952828e34c	92	protected:
hudakz	0:fa952828e34c	93
hudakz	0:fa952828e34c	94	virtual int _putc(int value);
hudakz	0:fa952828e34c	95	virtual int _getc();
hudakz	0:fa952828e34c	96
hudakz	0:fa952828e34c	97	// character location
hudakz	0:fa952828e34c	98	int _column;
hudakz	0:fa952828e34c	99	int _row;
hudakz	0:fa952828e34c	100
hudakz	0:fa952828e34c	101	// colours
hudakz	0:fa952828e34c	102	volatile uint16_t _foreground;
hudakz	0:fa952828e34c	103	volatile uint16_t _background;
hudakz	0:fa952828e34c	104	char *_path;
hudakz	0:fa952828e34c	105	};
hudakz	0:fa952828e34c	106
hudakz	0:fa952828e34c	107	#endif

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Type:	Program
Mbed OS support:	Mbed OS
Created:	10 May 2020
Imports:	38
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	0
Followers:	3