2019春計算機組成實驗報告

實驗三：基于VerilogFPGA/CPLD的多功能秒表設(shè)一Verilog硬件描述語言和對FPGA/CPLD的編程操作，是進行后續(xù)《計算機組成原理》部分課程實驗，設(shè)計實現(xiàn)計算機邏輯的基礎(chǔ)。二．實驗內(nèi)容和任務(wù)Verilog硬件描述語言，基于DE1-SOC實驗板，設(shè)計實現(xiàn)一個具有較6個數(shù)碼管設(shè)計為具有“分：秒：毫秒”顯示，按鍵的控制動作有：Verilog代碼三．實驗儀器和平臺實驗DE1-SOC111實驗平臺：多功能秒表實驗基于In /AlteraDE1-SOC實驗開發(fā)板，實驗開發(fā)環(huán)境為Altera-QuartusⅡ13.1。四變量定義：key_reset表示復(fù)位鍵；key_start_pause表示開始/暫停鍵；key_display_stop表hex0~hex5用來顯67led0~3led指示燈，在復(fù)位鍵、regdisplay_work1值，受key_display_stop控制。regcounter_work表示計數(shù)工作狀態(tài)，即值為1時，秒表正在計時，受regminute_display_high;minute_display_low;second_display_high;second_display_low;msecond_display_high;msecond_display_low;6regminute_counter_high;minute_counter_low;second_counter_high;second_counter_low;msecond_counter_high;msecond_counter_low;650000010ms。50000010ms若msecond_counter_low1msecond_low若msecond_counter_high滿十，則msecond_counter_high置零，同時若second_counter_low滿十，則second_counter_low若second_counter_high滿六，則second_counter_high置零，同時，若minute_counter_low滿十，則minute_counter_lowif(counter_work==1)msecond_counter_low= msecond_counter_low1;if(msecond_counter_low==4'b1010)//滿10進1msecond_counter_highmsecond_counter_high1;if(msecond_counter_high==4'b1010)//滿10進1msecond_counter_high=0;second_counter_lowsecond_counter_low1;ifsecond_counter_low4'b1010101second_counter_highsecond_counter_high1;if(second_counter_high==4'b0110)//滿6進1minute_counter_lowminute_counter_low1;ifminute_counter_low4'b1010101if(key_start_pause==start_time_1if(key_start_pause==start_time_1=start_time_1+1;if(start_time_1==500000)counter_work1counter_work;//反轉(zhuǎn)是否計時狀態(tài)if(key_start_pause==0)start_time_1=if(key_display_stop==display_time_1=display_time_1+1;if(display_time_1==500000)display_work1display_work;//反轉(zhuǎn)是否顯示狀態(tài)if(key_display_stop==0)鍵沒有按下時，即key_display_stop為0，我們每個時鐘周期令用于display的寄存器的值與用于counter的寄存器值相等，即可使顯示值為實時記錄的值，若暫停顯示被按下，則display不再等于counter，即體現(xiàn)出暫停效果。代碼設(shè)計如下：ifif(display_work==msecond_display_low=msecond_counter_low;second_display_low=second_counter_low;second_display_high=second_counter_high;minute_display_low=minute_counter_low;minute_display_high=minute_counter_high;同時還有關(guān)于復(fù)位鍵的設(shè)將所有用于counter和display的寄存器值置零即ififkey_reset1'b0)//如果復(fù)位被按下 =minute_counter_high=0;second_display_low=second_counter_low;second_display_high=second_counter_high;minute_display_low=minute_counter_low;minute_display_high=minute_counter_high;counter_work=0;display_work=led0=display_work;led2=led0=display_work;led2=counter_work;led1=1-led0;