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

Users » hudakz » Code » LCD_McuFriend_FSMC_STM32F407

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/Inits/SSD1306.cpp@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 UniGraphic library - Device specific class
hudakz	0:fa952828e34c	2	* Copyright (c) 2015 Peter Drescher
hudakz	0:fa952828e34c	3	* Released under the MIT License: http://mbed.org/license/mit
hudakz	0:fa952828e34c	4	*/
hudakz	0:fa952828e34c	5
hudakz	0:fa952828e34c	6	#include "Protocols.h"
hudakz	0:fa952828e34c	7	#include "SSD1306.h"
hudakz	0:fa952828e34c	8
hudakz	0:fa952828e34c	9	//////////////////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	10	// display settings ///////////////////////////////////////////////////////
hudakz	0:fa952828e34c	11	/////////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	12
hudakz	0:fa952828e34c	13
hudakz	0:fa952828e34c	14	#define IC_X_SEGS 128 // UC1608 SEG has range 0-239 (239-0 if MX=1), check your datasheet, important for the orientation
hudakz	0:fa952828e34c	15	#define IC_Y_COMS 64 // UC1608 COM has range 0-127 (127-0 if MY=1), check your datasheet, important for the orientation
hudakz	0:fa952828e34c	16
hudakz	0:fa952828e34c	17	#define SSD1306_SETCONTRAST 0x81
hudakz	0:fa952828e34c	18	#define SSD1306_DISPLAYALLON_RESUME 0xA4
hudakz	0:fa952828e34c	19	#define SSD1306_DISPLAYALLON 0xA5
hudakz	0:fa952828e34c	20	#define SSD1306_NORMALDISPLAY 0xA6
hudakz	0:fa952828e34c	21	#define SSD1306_INVERTDISPLAY 0xA7
hudakz	0:fa952828e34c	22	#define SSD1306_DISPLAYOFF 0xAE
hudakz	0:fa952828e34c	23	#define SSD1306_DISPLAYON 0xAF
hudakz	0:fa952828e34c	24	#define SSD1306_SETDISPLAYOFFSET 0xD3
hudakz	0:fa952828e34c	25	#define SSD1306_SETCOMPINS 0xDA
hudakz	0:fa952828e34c	26	#define SSD1306_SETVCOMDETECT 0xDB
hudakz	0:fa952828e34c	27	#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
hudakz	0:fa952828e34c	28	#define SSD1306_SETPRECHARGE 0xD9
hudakz	0:fa952828e34c	29	#define SSD1306_SETMULTIPLEX 0xA8
hudakz	0:fa952828e34c	30	#define SSD1306_SETLOWCOLUMN 0x00
hudakz	0:fa952828e34c	31	#define SSD1306_SETHIGHCOLUMN 0x10
hudakz	0:fa952828e34c	32	#define SSD1306_SETSTARTLINE 0x40
hudakz	0:fa952828e34c	33	#define SSD1306_MEMORYMODE 0x20
hudakz	0:fa952828e34c	34	#define SSD1306_COMSCANINC 0xC0
hudakz	0:fa952828e34c	35	#define SSD1306_COMSCANDEC 0xC8
hudakz	0:fa952828e34c	36	#define SSD1306_SEGREMAP 0xA0
hudakz	0:fa952828e34c	37	#define SSD1306_CHARGEPUMP 0x8D
hudakz	0:fa952828e34c	38
hudakz	0:fa952828e34c	39	SSD1306::SSD1306(proto_t displayproto, PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const char *name , unsigned int LCDSIZE_X, unsigned int LCDSIZE_Y)
hudakz	0:fa952828e34c	40	: LCD(displayproto, port, CS, reset, DC, WR, RD, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
hudakz	0:fa952828e34c	41	{
hudakz	0:fa952828e34c	42	hw_reset();
hudakz	0:fa952828e34c	43	BusEnable(true);
hudakz	0:fa952828e34c	44	init();
hudakz	0:fa952828e34c	45	cls();
hudakz	0:fa952828e34c	46	set_orientation(1);
hudakz	0:fa952828e34c	47	locate(0,0);
hudakz	0:fa952828e34c	48	}
hudakz	0:fa952828e34c	49	SSD1306::SSD1306(proto_t displayproto, int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC, const char *name, unsigned int LCDSIZE_X, unsigned int LCDSIZE_Y)
hudakz	0:fa952828e34c	50	: LCD(displayproto, Hz, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
hudakz	0:fa952828e34c	51	{
hudakz	0:fa952828e34c	52	hw_reset();
hudakz	0:fa952828e34c	53	BusEnable(true);
hudakz	0:fa952828e34c	54	init();
hudakz	0:fa952828e34c	55	cls();
hudakz	0:fa952828e34c	56	set_orientation(1);
hudakz	0:fa952828e34c	57	locate(0,0);
hudakz	0:fa952828e34c	58	}
hudakz	0:fa952828e34c	59
hudakz	0:fa952828e34c	60	SSD1306::SSD1306(proto_t displayproto, int Hz, int address, PinName sda, PinName scl, const char* name , unsigned int LCDSIZE_X, unsigned int LCDSIZE_Y)
hudakz	0:fa952828e34c	61	: LCD(displayproto, Hz, address, sda, scl, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
hudakz	0:fa952828e34c	62	{
hudakz	0:fa952828e34c	63	init();
hudakz	0:fa952828e34c	64	cls();
hudakz	0:fa952828e34c	65	set_orientation(1);
hudakz	0:fa952828e34c	66	locate(0,0);
hudakz	0:fa952828e34c	67	}
hudakz	0:fa952828e34c	68
hudakz	0:fa952828e34c	69
hudakz	0:fa952828e34c	70	// reset and init the lcd controller
hudakz	0:fa952828e34c	71	void SSD1306::init()
hudakz	0:fa952828e34c	72	{
hudakz	0:fa952828e34c	73	/* Start Initial Sequence ----------------------------------------------------*/
hudakz	0:fa952828e34c	74
hudakz	0:fa952828e34c	75	// wr_cmd8(0xE2); // sw reset
hudakz	0:fa952828e34c	76	wait_ms(15);
hudakz	0:fa952828e34c	77
hudakz	0:fa952828e34c	78	wr_cmd8(SSD1306_DISPLAYOFF); // no problem in SPI_16 for single byte cmds
hudakz	0:fa952828e34c	79	wr_cmd16((SSD1306_SETDISPLAYCLOCKDIV<<8)\|0x80); // wr_cmd16 for multibyte cmds issue in SPI16 mode
hudakz	0:fa952828e34c	80	// wr_cmd8(0x80); // in SPI_16 it would become 0xE380 and will break things up
hudakz	0:fa952828e34c	81	wr_cmd16((SSD1306_SETMULTIPLEX<<8)\|63);
hudakz	0:fa952828e34c	82	// wr_cmd8(63);
hudakz	0:fa952828e34c	83
hudakz	0:fa952828e34c	84	wr_cmd16((SSD1306_SETDISPLAYOFFSET<<8)\|0x00);
hudakz	0:fa952828e34c	85	// wr_cmd8(0x0);
hudakz	0:fa952828e34c	86
hudakz	0:fa952828e34c	87	wr_cmd8(SSD1306_SETSTARTLINE \| 0x0); // line #0
hudakz	0:fa952828e34c	88
hudakz	0:fa952828e34c	89	wr_cmd16((SSD1306_CHARGEPUMP<<8)\|0x14);
hudakz	0:fa952828e34c	90	// wr_cmd8(0x14); // 0x10
hudakz	0:fa952828e34c	91
hudakz	0:fa952828e34c	92	wr_cmd16((SSD1306_MEMORYMODE<<8)\|0x00);
hudakz	0:fa952828e34c	93	// wr_cmd8(0x00); // 0x0 act like ks0108
hudakz	0:fa952828e34c	94
hudakz	0:fa952828e34c	95	wr_cmd8(SSD1306_SEGREMAP ); //\| 0x1);
hudakz	0:fa952828e34c	96
hudakz	0:fa952828e34c	97	wr_cmd8(SSD1306_COMSCANDEC);
hudakz	0:fa952828e34c	98
hudakz	0:fa952828e34c	99	wr_cmd16((SSD1306_SETCOMPINS<<8)\|0x12);
hudakz	0:fa952828e34c	100	// wr_cmd8(0x12); // LCDSIZE_Y == 32 ? 0x02 : 0x12);
hudakz	0:fa952828e34c	101
hudakz	0:fa952828e34c	102	wr_cmd16((SSD1306_SETCONTRAST<<8)\|0xCF);
hudakz	0:fa952828e34c	103	// wr_cmd8(0xCF); // _rawHeight == 32 ? 0x8F : ((vccstate == SSD1306_EXTERNALVCC) ? 0x9F : 0xCF) );
hudakz	0:fa952828e34c	104
hudakz	0:fa952828e34c	105	wr_cmd16((SSD1306_SETPRECHARGE<<8)\|0xF1);
hudakz	0:fa952828e34c	106	// wr_cmd8(0xF1); // : 0x22);
hudakz	0:fa952828e34c	107
hudakz	0:fa952828e34c	108	wr_cmd16((SSD1306_SETVCOMDETECT<<8)\|0x40);
hudakz	0:fa952828e34c	109	// wr_cmd8(0x40);
hudakz	0:fa952828e34c	110
hudakz	0:fa952828e34c	111	wr_cmd8(SSD1306_DISPLAYALLON_RESUME);
hudakz	0:fa952828e34c	112
hudakz	0:fa952828e34c	113	//wr_cmd8(SSD1306_NORMALDISPLAY);
hudakz	0:fa952828e34c	114	wr_cmd8(SSD1306_INVERTDISPLAY);
hudakz	0:fa952828e34c	115
hudakz	0:fa952828e34c	116	wr_cmd8(SSD1306_DISPLAYON);
hudakz	0:fa952828e34c	117	}
hudakz	0:fa952828e34c	118
hudakz	0:fa952828e34c	119	////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	120	// functions that overrides the standard ones implemented in LCD.cpp
hudakz	0:fa952828e34c	121	////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	122
hudakz	0:fa952828e34c	123	void SSD1306::mirrorXY(mirror_t mode)
hudakz	0:fa952828e34c	124	{
hudakz	0:fa952828e34c	125	switch (mode)
hudakz	0:fa952828e34c	126	{
hudakz	0:fa952828e34c	127	case(NONE):
hudakz	0:fa952828e34c	128	wr_cmd16(0xA0C0);
hudakz	0:fa952828e34c	129	break;
hudakz	0:fa952828e34c	130	case(X):
hudakz	0:fa952828e34c	131	wr_cmd16(0xA1C0);
hudakz	0:fa952828e34c	132	break;
hudakz	0:fa952828e34c	133	case(Y):
hudakz	0:fa952828e34c	134	wr_cmd16(0xA0C8);
hudakz	0:fa952828e34c	135	break;
hudakz	0:fa952828e34c	136	case(XY):
hudakz	0:fa952828e34c	137	wr_cmd16(0xA1C8);
hudakz	0:fa952828e34c	138	break;
hudakz	0:fa952828e34c	139	}
hudakz	0:fa952828e34c	140	}
hudakz	0:fa952828e34c	141
hudakz	0:fa952828e34c	142	void SSD1306::set_contrast(int o)
hudakz	0:fa952828e34c	143	{
hudakz	0:fa952828e34c	144	contrast = o;
hudakz	0:fa952828e34c	145
hudakz	0:fa952828e34c	146	wr_cmd16(0x8100\|(o&0xFF));
hudakz	0:fa952828e34c	147	}
hudakz	0:fa952828e34c	148
hudakz	0:fa952828e34c	149	////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	150	// functions that overrides the standard ones implemented in LCD.cpp
hudakz	0:fa952828e34c	151	////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	152
hudakz	0:fa952828e34c	153
hudakz	0:fa952828e34c	154	const uint8_t scroll_speed[8]={3,2,1,6,0,5,4,7};
hudakz	0:fa952828e34c	155
hudakz	0:fa952828e34c	156	////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	157	// functions addon to LCD.cpp
hudakz	0:fa952828e34c	158	////////////////////////////////////////////////////////////////////
hudakz	0:fa952828e34c	159	void SSD1306::horizontal_scroll(int l_r,int s_page,int e_page,int speed){
hudakz	0:fa952828e34c	160	wr_cmd8(0x2E); // deactivate scroll before change
hudakz	0:fa952828e34c	161	if(l_r == 1){
hudakz	0:fa952828e34c	162	wr_cmd16(0x2700); // horizontal scroll left
hudakz	0:fa952828e34c	163	}
hudakz	0:fa952828e34c	164	else {
hudakz	0:fa952828e34c	165	wr_cmd16(0x2600);
hudakz	0:fa952828e34c	166	}
hudakz	0:fa952828e34c	167	wr_cmd16((s_page & 0x07)<<8 \| (scroll_speed[speed & 0x07]));
hudakz	0:fa952828e34c	168	wr_cmd16((e_page & 0x07)<<8 );
hudakz	0:fa952828e34c	169	wr_cmd16(0xFF2F);
hudakz	0:fa952828e34c	170	}
hudakz	0:fa952828e34c	171
hudakz	0:fa952828e34c	172	void SSD1306::horiz_vert_scroll(int l_r,int s_page,int e_page,int v_off,int speed){
hudakz	0:fa952828e34c	173	wr_cmd8(0x2E); // deactivate scroll before change
hudakz	0:fa952828e34c	174	if(l_r == 1){
hudakz	0:fa952828e34c	175	wr_cmd16(0x2A00); // horizontal scroll left
hudakz	0:fa952828e34c	176	}
hudakz	0:fa952828e34c	177	else {
hudakz	0:fa952828e34c	178	wr_cmd16(0x2900);
hudakz	0:fa952828e34c	179	}
hudakz	0:fa952828e34c	180	wr_cmd16((s_page & 0x07)<<8 \| (scroll_speed[speed & 0x07]));
hudakz	0:fa952828e34c	181	wr_cmd16((e_page & 0x07)<<8 \| (v_off & 0x3F) );
hudakz	0:fa952828e34c	182	wr_cmd8(0x2F);
hudakz	0:fa952828e34c	183
hudakz	0:fa952828e34c	184	}
hudakz	0:fa952828e34c	185
hudakz	0:fa952828e34c	186	void SSD1306::end_scroll(){
hudakz	0:fa952828e34c	187	wr_cmd8(0x2E);
hudakz	0:fa952828e34c	188	}

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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