第二章　设计思路　2.1 设计总体框图　有分析可知，本次课程设计可以分成五个木块来实现相应的功能，分别是输入模块，计算模块，扫描模块，输出模块以及显示模块。((Calculator design based on FPGA DE2 development board. language use Verilog. Matrix keyboard input, LCD1602 display. Program includes key scanning module and LCD module and data process module, etc.)alculator\db\calculator.cycloneive_io_sim_cache.45um_ff_1200mv_0c_fast.hsd
calculator\db\calculator.cycloneive_io_sim_cache.45um_ii_1200mv_0c_slow.hsd
calculator\db\calculator.cycloneive_io_sim_cache.45um_ii_1200mv_85c_slow.hsd
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calculator\db\calculator.lpc.html)