Fingerprint Module Test With STONE TFT LCD

Introduction: Fingerprint Module Test With STONE TFT LCD

This month, I planned to develop a fingerprint door lock project. When I selected the fingerprint identification module, the project was suspended. However, I thought that since the fingerprint identification module had been purchased, I would simply test it.

Step 1: Introduction

This fingerprint module is purchased online. Through UART and MCU communication, fingerprint collection, fingerprint entry, fingerprint comparison and fingerprint deletion can be completed. Since the Demo program provided on the official website of fingerprint module USES STM32F103 series, I also bought a small development board of STM32 with the chip model of STM32F103C8T6. The Demo program of the fingerprint module USES LED lights to prompt the user to enter the fingerprint and compare the status (success or failure). But I want to use an LCD display, so I chose a 480*272 resolution LCD displayer. The specific model of this display is STONE stvc050wt-01, which communicates with MCU through UART. This will be covered in later chapters.

Step 2: 3 Parts of Hardware

A total of three hardware modules are used:

Step 3: Fingerprint Identification Module With UART-TTL

The UART Fingerprint Reader module takes STM32F205 high-speed digital processor imported from ST company as the core, combines the commercial Fingerprint algorithm (tfs-9), high-precision optical sensor (tfs-d400), and has the functions of Fingerprint entry, image processing, feature value extraction, template generation, template storage, Fingerprint comparison and search.Provide UART interface and communication protocol, professional for scientific research units, application integration manufacturers to provide standard secondary development fingerprint suite, fast, convenient integration applications.

Step 4: Features

1) sensitive fingerprint sensing and fast identification speed: the fingerprint module adopts high-precision optical path and imaging components, so only hands are needed when using it

Refers to a light click, can quickly identify.

2) stability first: the module adopts the advanced digital processing chip imported from ST company STM32F205 as the processor, with low power consumption and fast speed Speed stability, than domestic chip, other platform chip stability at least 30%.

3) scientific structure: the module adopts split structure, fingerprint sensor + processing motherboard + algorithm platform, and the motherboard is stable. Adopt standard 16P universal interface;Sensors can be independently selected and replaced optical and semiconductor sensors;Commercial algorithms are used.

4) easy development: serial port UART operation (directly connected to any single-chip microcomputer with serial port), extremely simple operation, and equipped with a PC Demo software, learning software, MCU routines and related tools.

5) openness: free input and output of fingerprint pictures, fingerprint characteristic value files and various fingerprint operations.

Step 5: Application Scenarios

Fingerprint product development: the development of fingerprint lock, fingerprint safe, fingerprint access control, fingerprint attendance

Fingerprint integration application: integrated in all kinds of security products, such as intercom, switch, personnel identification, permission management.

Step 6: 5 Inch STONE STVC050WT 4:3 TFT-LCD Module

480*272 LCD-TFT Displayer introduction

In this project, I would like to use the display screen of STONE STVC050WT to display the status of the fingerprint module (fingerprint entry status, fingerprint contrast status and deletion of fingerprint data).This display has been integrated with the driver chip, and the development software can be provided for the user to use, the user just need to add the designed UI picture through the computer software button, text box, and then generate the configuration file to download into the display and then run. The STVC050WT display communicates with MCU through uart-ttl signal. In theory, STONE display screen and fingerprint module can communicate directly. However, due to the different communication data protocols of the two modules, it is impossible to shake hands. Therefore, a MCU is still needed for conversion.

Website have detailed information and introduction:

If you need a video tutorial, you can download it from the official website.

Step 7: 3 Steps to Get Start With STONE Touch LCD Displayer

  • Four steps of STONE display development:
  • Designed the user display interface with PhotoShop software.
  • Design display logic and button logic with STONE TOOL software, and download the design file onto the display module.
  • MCU communicates with STONE LCD display module through serial port.
  • The data obtained in step 3 shall be used for other actions by MCU.

Step 8: About STONE TOOL Software Installation

Download the latest version of the STONE TOOL software (currently TOOL2019) from the official website and install it.

After the software installation is completed, the following interface will be opened:

Click the "File" button in the upper left corner to create a new project, which will be explained in the following sections.

Step 9: STM32 MCUSTM32F103C8T6

Step 10: Introduction of Chip

Step 11: The Development Environment of STM32

Keil vision is an integrated development environment developed by Keil. Currently, there are several versions of Vision2, Vision3, Vision4 and Vision5. In 2005, Keil was acquired by ARM. In March 2011, the latest integrated development environment Realview MDK development tool released by ARM integrated the latest version of Keil uvision4, and its compiler and debugging tool realized the most perfect match with ARM devices.

STM32 USES the KEIL MDK development environment, which is available on the web for installation tutorials.

Step 12: STONE LCD Fingerprint Module Test Project Implementation

Hardware connection 2 development board and stone LCD module

To make sure that we can write code later, we must first determine the reliability of the hardware connection.
Three hardware modules are used in this project:

  • STM32F103C8T6 development board
  • STONE STVC050WT tft-lcd display
  • Fingerprint module

The STM32F103C8T6 development board and STVC050WT tft-lcd display are connected through UART, and then the STM32F103C8T6 development board and fingerprint module are also connected through UART. Make sure the hardware connection is correct, then move on to the next step.

Step 13: Only 1 Step to Design UI Graphic

Using photoshop, I designed this UI picture simply:

Step 14: TFT LCD Display Module Design

First of all, we need to design a UI display image, which can be designed with PhotoShop software or other image design tools. After designing the UI display image, save the image as JPG format.

Open the STONE TOOL2019 software and create a new project:

Step 15: Delete the Image That the New Project Loads by Default, and Add the UI Image That We Designed Ourselves.

Step 16: How to Add Font File by STONE Tool

Step 17: Shows Fingerprint Verification in Real Time

The item has a status bar that shows fingerprint verification in real-time, so you need to add a font.

Add text display components and buttons to get the storage location of components in the display. The effect is as follows:

Step 18: How to Generate Configuration Files for STONE LCD

Once the UI design above is complete, you can generate the configuration file and download it to the STVC050WT-01 display, which is described in the STONE development materials.

Perform step 1 to generate the configuration file, then insert the usb flash drive into the computer. The flash drive will display. Then click "Download to u-disk" to Download the configuration file to the usb flash drive, and then insert the usb flash drive into STVC050WT-01 to complete the upgrade.

Step 19: How to Connect the Fingerprint Module With UART-TTL

The fingerprint module actually consists of two parts:

Optical collector

Drive circuit

The core part is the driver circuit, which is integrated with a STM32F2 series chip. The fingerprint algorithm and collection algorithm have been written internally, and UART communication is provided to users, so it is very convenient for us to be application developers.

Hardware connection:

VCC ------ -- 3.3v or 5V

GND -- -- -- -- -- -GND

TXD(fingerprint module serial port send) ------ RXD (PC or MCU serial port receive)

RXD(fingerprint module serial port receive) ------ TXD (PC or MCU serial port send)

BL (backlight of fingerprint head, not connected) ---- IO port

RST(fingerprint module reset, not connected) ------ IO port

The first time to use it, you can use a PC to communicate with fingerprint module through the serial port to do the test, and click the following link to watch the tutorial:

Step 20: STM32 Application Development

Log on to the official website of the fingerprint module supplier, download the fingerprint module driver Demo program provided by them, and then open the program with KEIL software.

Step 21: Use the Program Provided by the Official Website, Make Some Minor Modifications, and Then Connect the Hardware. the Picture of Connection Is As Follows:

Step 22: Then Send Instructions Through the Computer Serial Assistant Software, You Can Receive a Reply.

Step 23: Here Is the Code in Main.c :

#include #include "usart.h" #include "timer.h" #include "fingerprint.h" #define ADDUSER_BTN_ADDR 0x01 #define VERIFY_BTN_ADDR 0x05 #define CLEAR_BTN_ADDR 0x09 #define TEXT_STATUS_ADDR 0x0c #define USER_SUCESS 0x01 #define USER_FAIL 0X00 u8 data_send[8]= {0xA5, 0x5A, 0x05, 0x82, 0x00, 0x00, 0x00,0x00}; void delay() { u16 i, j; for (i = 0; i < 1000; i++) for(j = 0; j < 10000; j++); } //void USERGPIO_Init(void) //{ // GPIO_InitTypeDef GPIO_InitStructure; // // RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG, ENABLE); // // GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; // GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // GPIO_Init(GPIOF, &GPIO_InitStructure); // GPIO_ResetBits(GPIOF,GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9); // GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_8; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; // GPIO_Init(GPIOG, &GPIO_InitStructure); // GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; // GPIO_Init(GPIOC, &GPIO_InitStructure); //} //u8 key_scan(void) //{ // if(!USER_KEY||!PRESS_KEY||!DEL_KEY) // { // delay(); // if(!USER_KEY) return 1; // if(!PRESS_KEY) return 2; // if(!DEL_KEY) return 3; // } // return 0; //} void UART1_Send_Array(u8 send_array[],unsigned char num) { u8 i=0; while(i

Step 24: There Is One Other Change That Needs to Be Made in the Program Downloaded From the Official Website: the Code Is As Follows:

u16 USART_RX_STA=0; u8 USART_RX_END=0; u8 USART_RX_BUF[10]; void USART1_IRQHandler(void) { u8 Res; if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { Res =USART_ReceiveData(USART1); //printf("%x",USART_ReceiveData(USART1)); // USART_SendData(USART1,Res); if(USART_RX_END==0) { USART_RX_BUF[USART_RX_STA]=Res ; USART_RX_STA++; if(USART_RX_STA>8) { USART_RX_END=1; } } } }

Step 25:

Step 26: The Final Result

We only need to connect the STM32 microcontroller, fingerprint module, and display screen, and then the power supply. At this time, press the button above the displayer, you can normally add delete and verify the fingerprint.

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