基于Altera de2的电话计费器设计，通过数码管显示时间和费用。vhdl编写
telphone\db\telphone.db_info
........\display.vhd
........\display.vhd.bak
........\jishi.vhd
........\jishi.vhd.bak
........\jishu.vhd
........\jishu.vhd.bak
........\telphone.qpf
........\telphone.qsf
........\telphone.qws
........\telphone.vhd
........\telphone.vhd.bak
........\telphone_assignment_defaults.qdf
........\Vhdl1.vhd
........\db
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