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        • C
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      • PIC32
        • C
          • NECTO Studio
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        • Basic
          • mikroBasic PRO for PIC32
        • Pascal
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        • Additional Software
          • CODEGRIP WiFi license
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          • Visual TFT
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          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • ARM
        • C
          • NECTO Studio
          • mikroC PRO for ARM
        • Basic
          • mikroBasic PRO for ARM
        • Pascal
          • mikroPascal PRO for ARM
        • Additional Software
          • CODEGRIP WiFi license
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          • Visual TFT
          • Visual TFT AI
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • AVR
        • C
          • NECTO Studio
          • mikroC PRO for AVR
        • Basic
          • mikroBasic PRO for AVR
        • Pascal
          • mikroPascal PRO for AVR
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • FT90x
        • C
          • mikroC PRO for FT90x
        • Basic
          • mikroBasic PRO for FT90x
        • Pascal
          • mikroPascal PRO for FT90x
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • 8051
        • C
          • mikroC PRO for 8051
        • Basic
          • mikroBasic PRO for 8051
        • Pascal
          • mikroPascal PRO for 8051
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
    • Dev Boards
      • PIC (8-bit)
        • 8th Generation
          • Fusion for PIC v8
          • EasyPIC PRO v8
          • EasyPIC PRO v8 over USB-C
          • EasyPIC v8
          • EasyPIC v8 over USB-C
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyPIC PRO v7a
          • PICPLC16 v7a
          • EasyPIC v7a
          • EasyPIC PRO v7
          • EasyPIC v7
        • 6th Generation
          • PICPLC16 v6
      • dsPIC/PIC24 (16-bit)
        • 8th Generation
          • EasyPIC v8 PIC24/dsPIC33
          • EasyPIC v8 for dsPIC30
          • EasyPIC v8 for dsPIC30 over USB-C
          • Fusion for PIC v8
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyPIC Fusion v7
          • EasyPIC v7 for dsPIC30
        • 6th Generation
          • Easy24-33 v6
      • PIC32 (32-bit)
        • 8th Generation
          • Fusion for PIC32
          • Fusion for PIC32 over USB-C
          • Fusion for PIC v8
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyPIC Fusion v7
      • ARM (32-bit)
        • 8th Generation
          • Fusion for ARM v8
          • Fusion for ARM v8 over USB-C
          • Fusion for STM32 v8
          • Fusion for STM32 over USB-C
          • Fusion for KINETIS v8
          • Fusion for Kinetis v8 over USB-C
          • Fusion for TIVA v8
          • Fusion for TIVA v8 over USB-C
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyMx PRO v7a STM32
          • EasyMx PRO v7 STM32
          • EasyMx PRO v7 Tiva
      • AVR (8-bit)
        • 8th Generation
          • EasyAVR v8
          • EasyAVR PRO v8
          • EasyAVR PRO v8 over USB-C
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyAVR v7
        • 6th Generation
          • AVRPLC16 v6
      • 8051 (8-bit)
        • 7th generation
          • BIG8051
        • 6th Generation
          • Easy8051 v6
      • PSoC (8-bit)
        • 6th Generation
          • UNI-DS6 Development System
      • RISC-V (32bit)
        • 8th Generation
          • UNI-DS v8
          • UNI-DS v8 over USB-C
      • Universal Boards
        • 8th Generation
          • UNI-DS v8
          • UNI-DS v8 over USB-C
          • Fusion for PIC v8
          • Fusion for ARM v8
        • 7th Generation
          • EasyPIC Fusion v7
        • 6th Generation
          • UNI-DS6
          • mikroBoard for PIC 80-pin
          • mikroBoard for AVR
          • mikroBoard for dsPIC
          • mikroBoard for PSoC
          • mikroBoard for 8051
          • mikroBoard for PIC 40-pin
          • mikroBoard for ARM
          • mikroBoard for ARM 144-pin
      • IoT - Wearable
        • Hexiwear
          • Hexiwear
          • Hexiwear Power User Pack
          • Hexiwear Docking Station
          • Hexiwear Battery Pack
          • Hexiwear Color Pack
          • Hexiwear Workstation
      • Analog Boards
        • 7th Generation
          • Analog System Lab Kit PRO
    • Starter Boards
      • PIC (8-bit)
        • Clicker
          • PIC clicker
        • Clicker 2
          • Clicker 2 for PIC18FJ
          • Clicker 2 for PIC18FK
        • Clicker 4
          • Clicker 4 for PIC18F
          • UNI Clicker
        • Ready
          • Ready for PIC Board
          • Ready for PIC (DIP28)
          • PIC-Ready2 Board
          • MMC Ready Board
        • StartUSB
          • StartUSB for PIC
      • dsPIC/PIC24 (16-bit)
        • Clicker 2
          • Clicker 2 for PIC24
          • Clicker 2 for dsPIC33
        • Clicker 4
          • UNI Clicker
        • Ready
          • dsPIC-Ready1 Board
          • dsPIC-Ready2 Board
          • DsPIC-Ready3 Board
          • dsPIC-Ready4 Board
      • PIC32 (32-bit)
        • Clicker
          • PIC32MX clicker
          • 6LoWPAN Clicker
          • PIC32MZ clicker
        • Clicker 2
          • Clicker 2 for PIC32MX
          • Clicker 2 for PIC32MZ
        • Clicker 4
          • UNI Clicker
        • MINI
          • MINI-32 Board
          • MINI-32 for PIC32MZ
        • Flip&Click
          • Flip&Click PIC32MZ
      • ARM (32-bit)
        • Clicker
          • RA4M1 Clicker
          • Kinetis Clicker
          • MSP432 Clicker
          • CEC1702 clicker
          • CEC1302 Clicker
          • STM32 M4 clicker
        • Clicker 2
          • Clicker 2 for STM32
          • Clicker 2 for Kinetis
          • Clicker 2 for CEC1702
          • Clicker 2 for MSP432
          • Clicker 2 for CEC1302
          • Clicker 2 for PSoC 6
        • Clicker 4
          • Clicker 4 for STM32F745VG
          • Clicker 4 for STM32F4
          • Clicker 4 for TMPM3H
          • Clicker 4 for TMPM4K
          • Clicker 4 for STM32
          • UNI Clicker
        • MINI
          • MINI-M4 for STM32
          • MINI-M4 For Kinetis
          • MINI-M4 for Tiva
          • MINI-M4 for Stellaris
          • MINI-M4 for MSP432
          • MINI-M0 for STM32
        • Flip&Click
          • Flip&Click SAM3X
      • AVR (8-bit)
        • Clicker 4
          • UNI Clicker
        • MINI
          • MINI-AT Board - 3.3V
          • MINI-AT Board - 5V
        • Ready
          • Ready for AVR Board
          • Ready For XMEGA
          • mikroXMEGA Board
          • AVR-Ready2 Board
        • StartUSB
          • StartUSB for AVR
      • 8051 (8-bit)
        • Ready
          • 8051-Ready Board
      • FT90x (32-bit)
        • Clicker 2
          • Clicker 2 for FT90x
      • Miscellaneous
        • USB
          • USB Wizard
          • Quail
          • FlowPaw Kit
      • Universal Boards
        • Clicker 4
          • UNI Clicker
    • Prog-Debug
      • PIC (8-bit)
        • CODEGRIP
          • UNI CODEGRIP
          • UNI CODEGRIP - USB-C
          • CODEGRIP for PIC
          • CODEGRIP for PIC USB-C
        • mikroProg
          • mikroProg for PIC
      • dsPIC/PIC24 (16-bit)
        • CODEGRIP
          • UNI CODEGRIP
          • UNI CODEGRIP - USB-C
          • CODEGRIP for PIC
        • mikroProg
          • mikroProg for dsPIC
      • PIC32 (32-bit)
        • CODEGRIP
          • UNI CODEGRIP
          • UNI CODEGRIP - USB-C
          • CODEGRIP for PIC
          • CODEGRIP for PIC USB-C
        • mikroProg
          • mikroProg for PIC32
      • ARM (32-bit)
        • CODEGRIP
          • UNI CODEGRIP
          • UNI CODEGRIP USB-C
          • CODEGRIP for ARM
          • CODEGRIP for ARM USB-C
          • CODEGRIP for STM32
          • CODEGRIP for KINETIS
          • CODEGRIP for Tiva
          • CODEGRIP for Tiva USB-C
        • mikroProg
          • mikroProg for STM32
          • mikroProg for Tiva
          • mikroProg for Kinetis
          • mikroProg for CEC
          • mikroProg for MSP432
          • mikroProg for PSoC 5LP
      • AVR (8-bit)
        • CODEGRIP
          • CODEGRIP for AVR
          • CODEGRIP for AVR - USB-C
          • UNI CODEGRIP
          • UNI CODEGRIP - USB-C
        • mikroProg
          • mikroProg for AVR
      • 8051 (8-bit)
        • mikroProg
          • mikroProg for 8051
      • FT90x (32-bit)
        • mikroProg
          • mikroProg for FT90x
    • Smart Displays
      • 2.8"
        • ARM (32-bit)
        • AVR (8-bit)
        • dsPIC/PIC24 (16-bit)
        • PIC (8-bit)
        • PIC32 (32-bit)
      • 3.5"
        • ARM (32-bit)
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        • PIC (8-bit)
        • PIC32 (32-bit)
      • 4.3"
        • ARM (32-bit)
        • FT90x (32-bit)
        • PIC (8-bit)
        • PIC32 (32-bit)
      • 5"
        • ARM (32-bit)
        • FT90x (32-bit)
        • PIC32 (32-bit)
      • 7"
        • ARM (32-bit)
        • FT90x (32-bit)
    • MCU Cards
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        • 8th Generation
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      • PIC32 (32-bit)
        • 8th Generation
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      • ARM (32-bit)
        • 8th Generation
        • 7th Generation
      • AVR (8-bit)
        • 8th Generation
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        • 8th Generation
    • Accessories
      • TFT Displays
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MikroElektronika white logo
  • Products
    • click boards icon Click Boards
      • Wireless Connectivity
        • GPS/GNSS
        • GSM/LTE
        • LTE IoT
        • BT/BLE
        • WiFi
        • RFID/NFC
        • GSM+GPS
        • 6LoWPAN
        • ZigBee
        • UWB
        • SigFox
        • Sub-1 GHz Transceievers
        • 2.4 GHz Trancevers
        • LoRa
        • WiFi+BLE
      • Sensors
        • Biometrics
        • Gas
        • Magnetic
        • Motion
        • Optical
        • Pressure
        • Proximity
        • Temperature & humidity
        • Current sensor
        • Miscellaneous
        • Environmental
        • Force
        • Inductance
        • RF meter
        • Click Shields
        • Click Bundles
      • Interface
        • Adapter
        • CAN
        • Port expander
        • RS485
        • USB
        • 1-Wire
        • RS232
        • Ethernet
        • LIN
        • PWM
        • Current
        • DALI
        • I2C
        • Fiber optics
        • SPI
        • DMX
        • CXPI
        • Click Shields
        • Click Bundles
      • Display & LED
        • LED Drivers
        • LED Matrix
        • LED Segment
        • OLED
        • LCD
        • TFT
        • Click Shields
        • Click Bundles
      • Miscellaneous
        • Relay
        • Optocoupler
        • ID
        • Proto
        • Encryption
        • Click Shields
        • Click Bundles
      • Mixed Signal
        • ADC
        • Measurements
        • DAC
        • Digital potentiometer
        • ADC-DAC
        • Click Shields
        • Click Bundles
      • Storage
        • EEPROM
        • FLASH
        • FRAM
        • microSD
        • MRAM
        • SRAM
        • EERAM
        • ReRAM
        • DRAM
        • Click Shields
        • Click Bundles
      • Motor Control
        • Brushed
        • Brushless
        • Servo
        • Stepper
        • Click Shields
        • Click Bundles
      • Audio & Voice
        • Amplifier
        • Microphone
        • Speakers
        • Signal Processing
        • Speech recognition
        • FM
        • MP3
        • Click Shields
        • Click Bundles
      • HMI
        • Capacitive
        • Pushbutton/Switches
        • Potentiometers
        • Rotary encoder
        • Haptic
        • Fingerprint
        • Click Shields
        • Click Bundles
      • Clock & Timing
        • RTC
        • Clock generator
        • Click Shields
        • Click Bundles
      • Power Management
        • Battery charger
        • Boost
        • Buck
        • Linear
        • Buck-Boost
        • Wireless Charging
        • Power Switch
        • USB-C PD
        • Click Shields
        • Click Bundles
      • Click Bundles
      • Click Shields
    • necto icon NECTO
      • NECTO Studio
    • compilers icon Compilers
      • PIC
        • C
          • NECTO Studio
          • mikroC PRO for PIC
        • Basic
          • mikroBasic PRO for PIC
        • Pascal
          • mikroPascal PRO for PIC
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual TFT AI
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • dsPIC/PIC24
        • C
          • NECTO Studio
          • mikroC PRO for dsPIC
        • Basic
          • mikroBasic PRO for dsPIC
        • Pascal
          • mikroPascal PRO for dsPIC
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • PIC32
        • C
          • NECTO Studio
          • mikroC PRO for PIC32
        • Basic
          • mikroBasic PRO for PIC32
        • Pascal
          • mikroPascal PRO for PIC32
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • ARM
        • C
          • NECTO Studio
          • mikroC PRO for ARM
        • Basic
          • mikroBasic PRO for ARM
        • Pascal
          • mikroPascal PRO for ARM
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual TFT AI
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • AVR
        • C
          • NECTO Studio
          • mikroC PRO for AVR
        • Basic
          • mikroBasic PRO for AVR
        • Pascal
          • mikroPascal PRO for AVR
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • FT90x
        • C
          • mikroC PRO for FT90x
        • Basic
          • mikroBasic PRO for FT90x
        • Pascal
          • mikroPascal PRO for FT90x
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
      • 8051
        • C
          • mikroC PRO for 8051
        • Basic
          • mikroBasic PRO for 8051
        • Pascal
          • mikroPascal PRO for 8051
        • Additional Software
          • CODEGRIP WiFi license
          • CODEGRIP SSL license
          • Visual TFT
          • Visual GLCD
          • Package Manager
          • mikroBootloader
          • CAN calculator
          • GLCD Font Creator
          • Timer Calculator
          • MikroPlot
    • dev boards icon Dev Boards
      • PIC (8-bit)
        • 8th Generation
          • Fusion for PIC v8
          • EasyPIC PRO v8
          • EasyPIC PRO v8 over USB-C
          • EasyPIC v8
          • EasyPIC v8 over USB-C
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyPIC PRO v7a
          • PICPLC16 v7a
          • EasyPIC v7a
          • EasyPIC PRO v7
          • EasyPIC v7
        • 6th Generation
          • PICPLC16 v6
      • dsPIC/PIC24 (16-bit)
        • 8th Generation
          • EasyPIC v8 PIC24/dsPIC33
          • EasyPIC v8 for dsPIC30
          • EasyPIC v8 for dsPIC30 over USB-C
          • Fusion for PIC v8
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyPIC Fusion v7
          • EasyPIC v7 for dsPIC30
        • 6th Generation
          • Easy24-33 v6
      • PIC32 (32-bit)
        • 8th Generation
          • Fusion for PIC32
          • Fusion for PIC32 over USB-C
          • Fusion for PIC v8
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyPIC Fusion v7
      • ARM (32-bit)
        • 8th Generation
          • Fusion for ARM v8
          • Fusion for ARM v8 over USB-C
          • Fusion for STM32 v8
          • Fusion for STM32 over USB-C
          • Fusion for KINETIS v8
          • Fusion for Kinetis v8 over USB-C
          • Fusion for TIVA v8
          • Fusion for TIVA v8 over USB-C
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyMx PRO v7a STM32
          • EasyMx PRO v7 STM32
          • EasyMx PRO v7 Tiva
      • AVR (8-bit)
        • 8th Generation
          • EasyAVR v8
          • EasyAVR PRO v8
          • EasyAVR PRO v8 over USB-C
          • UNI-DS v8
          • UNI-DS v8 over USB-C
        • 7th Generation
          • EasyAVR v7
        • 6th Generation
          • AVRPLC16 v6
      • 8051 (8-bit)
        • 7th generation
          • BIG8051
        • 6th Generation
          • Easy8051 v6
      • PSoC (8-bit)
        • 6th Generation
          • UNI-DS6 Development System
      • RISC-V (32bit)
        • 8th Generation
          • UNI-DS v8
          • UNI-DS v8 over USB-C
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  1. Home
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  3. Fingerprint click - the complete biometric solution

Fingerprint click - the complete biometric solution

Published: 07/12/2016 | Post categories: Click boards, Learn

| Views:13235

Fingerprint click - the complete biometric solution

Biometric security is definitely a thing of the future, from fingers to eye retinas, even earlobes can be used to uniquely identify a human being. That is why we have decided to offer our customers a platform to develop biometric systems as efficiently as possible - get familiar with the Fingerprint click.

The click carries the GTS-511E2 fingerprint module. The module has  a CMOS image sensor covered with a lens. The CMOS sensor is built smart enough to recognize whether the fingerprint is real or a 2D copy. Along with the image sensor, the click also carries the STM32F415 MCU, which is the main operating unit of this click board. The STM32F415 contains firmware developed by our engineers. The firmware is designed so that the click can be used either as a standalone USB HID with a Windows PC application or as a SPI slave communicating with a host MCU. Since the first batch of Fingerprint clicks has been released with a previous firmware, designed only for standalone use, if you have bought the click before this article, you will need to perform a firmware update.

How to update the firmware

The current Fingerprint click comes equipped with our USB HID bootloader. If your PC recognizes the bootloader, the only thing you need to do is download the firmware from Libstock and upload it onto the click using the bootloader. The instructions on how to use our bootloader can be found here.

Now that you have the new firmware uploaded, you can use the click either as a standalone device with our Fingerprint click PC application, or with a host MCU.

Using the click with the PC application

The application can be downloaded from Libstock. Here's how to use it:

Start the application, and connect your PC with the click with a USB mini connector. For the first 5 or so seconds, the PC will recognize the click as "Mikroelektronika USB HID bootloader". This is because our bootloader has been designed to wait 5 seconds for the PC to connect, if 5 seconds pass, the MCU will jump out of bootloader mode and proceed with the user code. Once the click is out of bootloader mode your PC should detect the click as  "Mikroelektronika FINGERPRINT", and you should see the status "Ready" on the bottom left of the application.

Fingerprint application Fingerprint application

Now you can fully operate your Fingerprint click! If you click on the fingerprint icon, the click will capture an image and send it to the PC. The image will be displayed on the main window. The status label should read "Fingerprint transferred"

Fingerprint scanning Fingerprint scanning

If you want to save this image, just hit the save icon on the right.

Saving the image

In the settings window, you can set the different CMOS image sensor settings such as the exposure time or global gain. Once you hit SAVE, these settings will be sent from the PC to the click and stored in the clicks EEPROM.

Fingerprint click settings Fingerprint click settings

Using the click with a host MCU

The click can also communicate with an external host over SPI. We have made a simple example that shows how to do it. Let's look at the example in which we will interface a STM32F107 host MCU with the Fingerprint click.

We start of by initializing SPI communication and the TFT display, after which we will ping the click until we get a FP_READY byte as a response.

     SPI3_Init_Advanced( _SPI_FPCLK_DIV2, _SPI_MASTER | _SPI_8_BIT |
                    _SPI_CLK_IDLE_LOW | _SPI_FIRST_CLK_EDGE_TRANSITION |
                    _SPI_MSB_FIRST | _SPI_SS_DISABLE | _SPI_SSM_ENABLE |
                    _SPI_SSI_1, &_GPIO_MODULE_SPI3_PC10_11_12 );

     GPIO_Digital_Output( &GPIOD_BASE, _GPIO_PINMASK_13 );
     Delay_ms(3000);

     
     TFT_Init_ILI9341_8bit(320, 240);
     TFT_Set_Pen(CL_BLACK, 1);
     TFT_Set_Font(TFT_defaultFont, CL_BLACK, FO_HORIZONTAL);
     TFT_Fill_Screen(CL_Aqua);

     TFT_Write_Text("TFT Initialized, waiting for fingerprint click",10,10);
     Delay_ms(1000);
     TFT_Set_Address_Ptr(0,0);
     delay_ms(10000); // wait for the click to go out of bootloader mode
     
     
     TFT_Write_Text("Fingerprint ready test...", 10, 50);
     fingerprint_is_ready();

 

Every command sent has it's appropriate response, therefore, all the commands will ping the click until they get the right response. If something goes wrong, the MCU will continue to ping and be stuck forever in this loop. This is the case for all the functions used here. Let's take a look at the fingerprint_is_ready function for a clear example:

void fingerprint_is_ready()
{
     uint8_t temp_spi_buffer;
     CS_PIN = 0;
     delay_ms(10);
     Spi_Write(FP_TEST);
     delay_ms(20);
     CS_PIN = 1;

     temp_spi_buffer = 0;

     while ( temp_spi_buffer != FP_READY )
     {
           CS_PIN = 0;
           delay_ms(10);
           temp_spi_buffer = SPI_Read(FP_DUMMY);
           temp_spi_buffer = SPI_Read(FP_DUMMY);
           CS_PIN = 1;
           delay_ms(1000);
     }
}

 

You can see here that we first send a FP_TEST command, once the click receives this command, the internal buffer of the click will be set to FP_READY as a response. Once we issue an SPI_Read command, we should receive this response. The same goes for all other functions: we send a command, and then the internal buffer of the click will be set to the appropriate response.

#include 
#include "fingerprint.h"

sbit CS_PIN at GPIOD_ODR.b13;

unsigned int TFT_DataPort at GPIOE_ODR;
sbit TFT_RST at GPIOE_ODR.B8;
sbit TFT_RS at GPIOE_ODR.B12;
sbit TFT_CS at GPIOE_ODR.B15;
sbit TFT_RD at GPIOE_ODR.B10;
sbit TFT_WR at GPIOE_ODR.B11;
sbit TFT_BLED at GPIOE_ODR.B9;


void main()
{
    SPI3_Init_Advanced( _SPI_FPCLK_DIV2, _SPI_MASTER | _SPI_8_BIT |
                    _SPI_CLK_IDLE_LOW | _SPI_FIRST_CLK_EDGE_TRANSITION |
                    _SPI_MSB_FIRST | _SPI_SS_DISABLE | _SPI_SSM_ENABLE |
                    _SPI_SSI_1, &_GPIO_MODULE_SPI3_PC10_11_12 );

     GPIO_Digital_Output( &GPIOD_BASE, _GPIO_PINMASK_13 );
     Delay_ms(3000);

     
     TFT_Init_ILI9341_8bit(320, 240);
     TFT_Set_Pen(CL_BLACK, 1);
     TFT_Set_Font(TFT_defaultFont, CL_BLACK, FO_HORIZONTAL);
     TFT_Fill_Screen(CL_Aqua);

     TFT_Write_Text("TFT Initialized, waiting for fingerprint click",10,10);
     Delay_ms(1000);
     TFT_Set_Address_Ptr(0,0);
     delay_ms(10000); // wait for the click to go out of bootloader mode
     
     
     TFT_Write_Text("Fingerprint ready test...", 10, 50);
     fingerprint_is_ready();
     TFT_Write_Text("passed", 200, 50);

     TFT_Write_Text("Fingerprint capture image...", 10, 70);
     fingerprint_capture_image();
     TFT_Write_Text("passed", 200, 70);
     
     TFT_Write_Text("Displaying image", 10, 90);
     delay_ms(3000);
     fingerprint_display_image();
     fingerprint_end_image_transfer();

}

 

Let's look at the whole code now. After we are sure that the click is ready, we send a command for the click to capture an image, and then for the click to send us the image bytes. For every SPI_Read we issue, we will get one byte of the image. Each byte is then sent to the TFT display.

void fingerprint_display_image()
{
     uint8_t temp_spi_buffer;
     uint64_t temp_i;
     CS_PIN = 0;
     delay_ms(10);
     Spi_Write(FP_GET_IMAGE);
     delay_ms(20);
     CS_PIN = 1;
     delay_ms(20);
     TFT_CS = 0;
     TFT_Set_Address_Ptr(0,0);


     for (temp_i = 0; temp_i < 240*320; temp_i++)
     {
        CS_PIN = 0;
        temp_spi_buffer = SPI_READ(FP_DUMMY);
        CS_PIN = 1;
        TFT_Write_Data_ptr(temp_spi_buffer);
     }
     TFT_CS = 0;

}

 

And that's the whole deal. Getting a fingerprint scan has never been easier. Use the images whoever you seem fit and create your unique biometric security system! All the software mentioned here can be found on Libstock or GitHub. Good luck!

References

wikipedia.org "Biometrics" wikipedia 2016

wikipedia.org "CMOS" wikipedia 2016

wikipedia.org "USB Human Interface Device" wikipedia 2016

ST Microelectronics

MikroElektronika

Libstock

Products mentioned in this post

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    Mikroe Click boards Fingerprint Click front
    FINGERPRINT Click

    FingerPrint Click is a compact add-on board that interfaces a biometric security sensor with the host MCU. This board features the GTS-511E2 module from ADH Technology, one of the world's thinnest optical touch fingerprint sensors. The GTS-511E2 combines superior biometric performance and a high standard of quality components to offer a comprehensive...

    PID: MIKROE-1722
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