Based on Spartan external soft-core MicroBlaze 6 of interruption by pressing down the button triggers an interrupt, and come through the serial port interrupt frequency output.

MB_Interrupt
............\MB_DDR3
............\.......\MB_DDR3.bld
............\.......\MB_DDR3.cmd_log
............\.......\MB_DDR3.gise
............\.......\MB_DDR3.lso
............\.......\MB_DDR3.ncd
............\.......\MB_DDR3.ngc
............\.......\MB_DDR3.ngd
............\.......\MB_DDR3.ngr
............\.......\MB_DDR3.pad
............\.......\MB_DDR3.par
............\.......\MB_DDR3.pcf
............\.......\MB_DDR3.prj
............\.......\MB_DDR3.ptwx
............\.......\MB_DDR3.stx
............\.......\MB_DDR3.syr
............\.......\MB_DDR3.twr
............\.......\MB_DDR3.twx
............\.......\MB_DDR3.unroutes
............\.......\MB_DDR3.ut
............\.......\MB_DDR3.xise
............\.......\MB_DDR3.xpi
............\.......\MB_DDR3.xst
............\.......\MB_DDR3_bitgen.xwbt
............\.......\MB_DDR3_envsettings.html
............\.......\MB_DDR3_guide.ncd
............\.......\MB_DDR3_map.map
............\.......\MB_DDR3_map.mrp
............\.......\MB_DDR3_map.ncd
............\.......\MB_DDR3_map.ngm
............\.......\MB_DDR3_map.xrpt
............\.......\MB_DDR3_ngdbuild.xrpt
............\.......\MB_DDR3_pad.csv
............\.......\MB_DDR3_pad.txt
............\.......\MB_DDR3_par.xrpt
............\.......\MB_DDR3_summary.html
............\.......\MB_DDR3_summary.xml
............\.......\MB_DDR3_usage.xml
............\.......\MB_DDR3_xst.xrpt
............\.......\SDK.gentemplate.tcl
............\.......\SDK.init_bram.tcl
............\.......\SDK.ncf
............\.......\SDK.ngc
............\.......\SDK.synth.tcl
............\.......\SDK.tfi
............\.......\SDK_axi4_0_wrapper.ncf
............\.......\SDK_axi4_0_wrapper.ngc
............\.......\SDK_axi4lite_0_wrapper.ncf
............\.......\SDK_axi4lite_0_wrapper.ngc
............\.......\SDK_axi_intc_0_wrapper.ncf
............\.......\SDK_axi_intc_0_wrapper.ngc
............\.......\SDK_axi_timer_0_wrapper.ngc
............\.......\SDK_button_wrapper.ngc
............\.......\SDK_clock_generator_0_wrapper.ncf
............\.......\SDK_clock_generator_0_wrapper.ngc
............\.......\SDK_debug_module_wrapper.ngc
............\.......\SDK_led_wrapper.ngc
............\.......\SDK_mcb_ddr_wrapper.ncf
............\.......\SDK_mcb_ddr_wrapper.ngc
............\.......\SDK_microblaze_0_bram_block_wrapper.ngc
............\.......\SDK_microblaze_0_d_bram_ctrl_wrapper.ngc
............\.......\SDK_microblaze_0_dlmb_wrapper.ncf
............\.......\SDK_microblaze_0_dlmb_wrapper.ngc
............\.......\SDK_microblaze_0_i_bram_ctrl_wrapper.ngc
............\.......\SDK_microblaze_0_ilmb_wrapper.ncf
............\.......\SDK_microblaze_0_ilmb_wrapper.ngc
............\.......\SDK_microblaze_0_wrapper.ncf
............\.......\SDK_microblaze_0_wrapper.ngc
............\.......\SDK_proc_sys_reset_0_wrapper.ngc
............\.......\SDK_summary.html
............\.......\_ngo
............\.......\....\netlist.lst
............\.......\_xmsgs
............\.......\......\bitgen.xmsgs
............\.......\......\map.xmsgs
............\.......\......\ngdbuild.xmsgs
............\.......\......\par.xmsgs
............\.......\......\pn_parser.xmsgs
............\.......\......\trce.xmsgs
............\.......\......\xst.xmsgs
............\.......\edkBmmFile.bmm
............\.......\edkBmmFile_bd.bmm
............\.......\ipcore_dir
............\.......\iseconfig
............\.......\.........\MB_DDR3.projectmgr
............\.......\.........\MB_DDR3.xreport
............\.......\.........\SDK.xreport
............\.......\mb_ddr3.bgn
............\.......\mb_ddr3.bit
............\.......\mb_ddr3.drc
............\.......\par_usage_statistics.html
............\.......\usage_statistics_webtalk.html
............\.......\webtalk.log
............\.......\webtalk_pn.xml
............\.......\xlnx_auto_0_xdb
............\.......\...............\cst.xbcd
............\.......\xst
............\.......\...\dump.xst
............\.......\...\........\MB_DDR3.prj

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