Use labview to achieve matrix keys and oled screen display.

key_led
.......\builds
.......\......\key_led
.......\......\.......\myRIO-1900
.......\......\.......\..........\My Real-Time Application
.......\......\.......\..........\........................\depinstr.bin
.......\......\.......\..........\........................\home
.......\......\.......\..........\........................\....\lvuser
.......\......\.......\..........\........................\....\......\natinst
.......\......\.......\..........\........................\....\......\.......\bin
.......\......\.......\..........\........................\....\......\.......\...\data
.......\......\.......\..........\........................\....\......\.......\...\....\myRIO v1.1 FPGA.lvbitx
.......\......\.......\..........\........................\....\......\.......\...\project
.......\......\.......\..........\........................\....\......\.......\...\.......\errors
.......\......\.......\..........\........................\....\......\.......\...\.......\......\ChineseS
.......\......\.......\..........\........................\....\......\.......\...\.......\......\........\LabVIEW Elemental IO-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\........\System Identification VIs-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\English
.......\......\.......\..........\........................\....\......\.......\...\.......\......\.......\LabVIEW Elemental IO-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\.......\LabVIEW FPGA IP Builder-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\.......\LV-RepGenForMSOffice-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\.......\System Identification VIs-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\French
.......\......\.......\..........\........................\....\......\.......\...\.......\......\......\LabVIEW Elemental IO-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\......\LabVIEW FPGA IP Builder-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\......\System Identification VIs-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\German
.......\......\.......\..........\........................\....\......\.......\...\.......\......\......\LabVIEW Elemental IO-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\......\LabVIEW FPGA IP Builder-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\......\System Identification VIs-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\Japanese
.......\......\.......\..........\........................\....\......\.......\...\.......\......\........\LabVIEW Elemental IO-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\........\LabVIEW FPGA IP Builder-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\........\System Identification VIs-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\.......\......\Korean
.......\......\.......\..........\........................\....\......\.......\...\.......\......\......\System Identification VIs-errors.txt
.......\......\.......\..........\........................\....\......\.......\...\startup.aliases
.......\......\.......\..........\........................\....\......\.......\...\startup.rtexe
.......\key_led
.......\.......\documentation
.......\.......\.............\myRIO Project Documentation.html
.......\

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