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/Inits/S6D04D1.cpp

Committer:: hudakz
Date:: 2020-05-10
Revision:: 0:fa952828e34c

File content as of revision 0:fa952828e34c:

 /* mbed UniGraphic library - Device specific class
 * Copyright (c) 2015 Giuliano Dianda
 * Released under the MIT License: http://mbed.org/license/mit
 */
#include "Protocols.h"
#include "S6D04D1.h"

//////////////////////////////////////////////////////////////////////////////////
// display settings ///////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////

// put in constructor
//#define LCDSIZE_X       240 // display X pixels, TFTs are usually portrait view
//#define LCDSIZE_Y       400  // display Y pixels



S6D04D1::S6D04D1(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)
    : TFT(displayproto, port, CS, reset, DC, WR, RD, LCDSIZE_X, LCDSIZE_Y, name)
{
    hw_reset();
    BusEnable(true);
    identify(); // will collect tftID, set mipistd flag
    init();
    auto_gram_read_format();// try to get read gram pixel format, could be 16bit or 18bit, RGB or BGR. Will set flags accordingly
//    scrollbugfix=1; // when scrolling 1 line, the last line disappears, set to 1 to fix it, for ili9481 is set automatically in identify()
    set_orientation(0);
    FastWindow(true); // most but not all controllers support this, even if datasheet tells they should. Give a try
    cls();
    locate(0,0); 
}
S6D04D1::S6D04D1(proto_t displayproto, PinName* buspins, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const char *name , unsigned int LCDSIZE_X, unsigned  int LCDSIZE_Y)
    : TFT(displayproto, buspins, CS, reset, DC, WR, RD, LCDSIZE_X, LCDSIZE_Y, name)
{
    hw_reset();
    BusEnable(true);
    identify(); // will collect tftID, set mipistd flag
    init();
    auto_gram_read_format();// try to get read gram pixel format, could be 16bit or 18bit, RGB or BGR. Will set flags accordingly
//    scrollbugfix=1; // when scrolling 1 line, the last line disappears, set to 1 to fix it, for ili9481 is set automatically in identify()
    set_orientation(0);
    FastWindow(true); // most but not all controllers support this, even if datasheet tells they should. Give a try
    cls();
    locate(0,0); 
}
S6D04D1::S6D04D1(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 )
    : TFT(displayproto, Hz, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, name)
{
    hw_reset(); //TFT class forwards to Protocol class
    BusEnable(true); //TFT class forwards to Protocol class
    identify(); // will collect tftID and set mipistd flag
    init(); // per display custom init cmd sequence, implemented here
    auto_gram_read_format();// try to get read gram pixel format, could be 16bit or 18bit, RGB or BGR. Will set flags accordingly
 //   scrollbugfix=1; // when scrolling 1 line, the last line disappears, set to 1 to fix it, for ili9481 is set automatically in identify()
    set_orientation(0); //TFT class does for MIPI standard and some ILIxxx
    FastWindow(true); // most but not all controllers support this, even if datasheet tells they should. Give a try
    cls();
    locate(0,0); 
}
// reset and init the lcd controller
void S6D04D1::init()
{
    /**********************************************
        TFT1P CODE Initialization of Truly 
       
     ************************************************        
         Panel:3.0 240400 
         Driver IC:S6D04D1X21-BAF8
     
     ************************************************/
wr_cmd8(0xE0); 
wr_data8(0x01); 

wr_cmd8(0x11); 
wait_ms(150); 

wr_cmd8(0xF3); 
wr_data8(0x01); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x0C);//Do not set any higher VCI1 level than VCI -0.15V. 0C 0A 
wr_data8(0x03);//VGH和VGL 01 02VGH=6VCI1,VGL=-4VCI1. 
wr_data8(0x75); 
wr_data8(0x75); 
wr_data8(0x30); 

wr_cmd8(0xF4); 
wr_data8(0x4C); 
wr_data8(0x4C); 
wr_data8(0x44); 
wr_data8(0x44); 
wr_data8(0x22); 

wr_cmd8(0xF5); 
wr_data8(0x10); 
wr_data8(0x22); 
wr_data8(0x05); 
wr_data8(0xF0); 
wr_data8(0x70); 
wr_data8(0x1F); 
wait_ms(30); 

wr_cmd8(0xF3); 
wr_data8(0x03); 
wait_ms(30); 
wr_cmd8(0xF3); 
wr_data8(0x07); 
wait_ms(30); 
wr_cmd8(0xF3); 
wr_data8(0x0F); 
wait_ms(30); 
wr_cmd8(0xF3); 
wr_data8(0x1F); 
wait_ms(30); 
wr_cmd8(0xF3); 
wr_data8(0x7F); 
wait_ms(30); 


wr_cmd8(0xF7); 
wr_data8(0x80); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x05); 
wr_data8(0x0D); 
wr_data8(0x1F); 
wr_data8(0x26); 
wr_data8(0x2D); 
wr_data8(0x14); 
wr_data8(0x15); 
wr_data8(0x26); 
wr_data8(0x20); 
wr_data8(0x01); 
wr_data8(0x22); 
wr_data8(0x22); 

wr_cmd8(0xF8); 
wr_data8(0x80); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x07); 
wr_data8(0x1E); 
wr_data8(0x2A); 
wr_data8(0x32); 
wr_data8(0x10); 
wr_data8(0x16); 
wr_data8(0x36); 
wr_data8(0x3C); 
wr_data8(0x3B); 
wr_data8(0x22); 
wr_data8(0x22); 

wr_cmd8(0xF9); 
wr_data8(0x80); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x05); 
wr_data8(0x0D); 
wr_data8(0x1F); 
wr_data8(0x26); 
wr_data8(0x2D); 
wr_data8(0x14); 
wr_data8(0x15); 
wr_data8(0x26); 
wr_data8(0x20); 
wr_data8(0x01); 
wr_data8(0x22); 
wr_data8(0x22); 


wr_cmd8(0xFA); 
wr_data8(0x80); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x07); 
wr_data8(0x1E); 
wr_data8(0x2A); 
wr_data8(0x32); 
wr_data8(0x10); 
wr_data8(0x16); 
wr_data8(0x36); 
wr_data8(0x3C); 
wr_data8(0x3B); 
wr_data8(0x22); 
wr_data8(0x22); 


wr_cmd8(0xFB); 
wr_data8(0x80); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x05); 
wr_data8(0x0D); 
wr_data8(0x1F); 
wr_data8(0x26); 
wr_data8(0x2D); 
wr_data8(0x14); 
wr_data8(0x15); 
wr_data8(0x26); 
wr_data8(0x20); 
wr_data8(0x01); 
wr_data8(0x22); 
wr_data8(0x22); 

wr_cmd8(0xFC); 
wr_data8(0x80); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x07); 
wr_data8(0x1E); 
wr_data8(0x2A); 
wr_data8(0x32); 
wr_data8(0x10); 
wr_data8(0x16); 
wr_data8(0x36); 
wr_data8(0x3C); 
wr_data8(0x3B); 
wr_data8(0x22); 
wr_data8(0x22); 

//wr_cmd8(0x35); 
wr_cmd8(0x34); // tearing effect line off

wr_cmd8(0x36); 
wr_data8(0x48);//08 

wr_cmd8(0x3A); 
wr_data8(0x05); 

wr_cmd8(0xF2); 
wr_data8(0x17); 
wr_data8(0x17); 
wr_data8(0x0F); 
wr_data8(0x08); 
wr_data8(0x08); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x00); 
wr_data8(0x13); 
wr_data8(0x00); 

wr_cmd8(0xF6); 
wr_data8(0x00); 
wr_data8(0x08); 
wr_data8(0x00); 
wr_data8(0x00); 

wr_cmd8(0xFD); 
wr_data8(0x02); 
wr_data8(0x01);//240*400 
 
wait_ms(20); 
wr_cmd8(0x29); // display on
wait_ms(20); 
    
}

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Repository details

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