soda machine自动贩卖机

基于spartan6编写的自动贩卖机，来自数字设计与计算机体系结构的项目。中山大学移动信息工程学院课程练习之一，此代码可以为大家提供一个参考。此源码实现按键输入钱，四个七段译码管显示当前钱数和找回钱的数目

soda_machine_4seg
_xmsgs
_ngo
xst
xlnx_auto_0_xdb
isim
iseconfig
ipcore_dir
fuse.log
isim.cmd
isim.log
par_usage_statistics.html
soda_machine_4seg.bgn
soda_machine_4seg.bit
soda_machine_4seg.bld
soda_machine_4seg.cmd_log
soda_machine_4seg.drc
soda_machine_4seg.gise
soda_machine_4seg.lso
soda_machine_4seg.ncd
soda_machine_4seg.ngc
soda_machine_4seg.ngd
soda_machine_4seg.ngr
soda_machine_4seg.pad
soda_machine_4seg.par
soda_machine_4seg.pcf
soda_machine_4seg.prj
soda_machine_4seg.ptwx
soda_machine_4seg.stx
soda_machine_4seg.syr
soda_machine_4seg.twr
soda_machine_4seg.twx
soda_machine_4seg.ucf
soda_machine_4seg.unroutes
soda_machine_4seg.ut
soda_machine_4seg.v
soda_machine_4seg.wcfg
soda_machine_4seg.xise
soda_machine_4seg.xpi
soda_machine_4seg.xst
soda_machine_4seg_bitgen.xwbt
soda_machine_4seg_envsettings.html
soda_machine_4seg_guide.ncd
soda_machine_4seg_map.map
soda_machine_4seg_map.mrp
soda_machine_4seg_map.ncd
soda_machine_4seg_map.ngm
soda_machine_4seg_map.xrpt
soda_machine_4seg_ngdbuild.xrpt
soda_machine_4seg_pad.csv
soda_machine_4seg_pad.txt
soda_machine_4seg_par.xrpt
soda_machine_4seg_summary.html
soda_machine_4seg_summary.xml
soda_machine_4seg_usage.xml
soda_machine_4seg_xst.xrpt
soda_test.v
soda_test_beh.prj
soda_test_isim_beh.exe
soda_test_isim_beh.wdb
usage_statistics_webtalk.html
webtalk.log
webtalk_pn.xml
xilinxsim.ini