微機(jī)原理與接口技術(shù)研究型實(shí)驗(yàn)報(bào)告(競(jìng)賽搶答器)-資料下載頁(yè)
2025-05-31 18:02本頁(yè)面
【正文】 CR4: 。復(fù)位操作的判斷（要求PA6到PA0置低）mov dx,200h in al,dx cmp al,0 jz starting cmp al,80h jz starting jnz CR4right05: mov dx,210h 。數(shù)碼管地址為210h mov al,6dh 。顯示出5 out dx,al mov dx,211h 。讓數(shù)碼管第一位顯示 mov al,00000001b out dx,al mov dx,202h 。C口地址為202h mov al,00010100b 。綠燈接PC2，鳴叫 out dx,al call ring 。并且讓揚(yáng)聲器鳴叫CR5: 。復(fù)位操作的判斷（要求PA6到PA0置低）mov dx,200h in al,dx cmp al,0 jz starting cmp al,80h jz starting jnz CR5right06: mov dx,210h 。數(shù)碼管地址為210h mov al,7dh 。顯示出6 out dx,al mov dx,211h 。讓數(shù)碼管第一位顯示 mov al,00000001b out dx,al mov dx,202h 。C口地址為202h mov al,00010100b 。綠燈接PC2，鳴叫 out dx,al call ring 。并且讓揚(yáng)聲器鳴叫CR6: 。復(fù)位操作的判斷（要求PA6到PA0置低）mov dx,200h in al,dx cmp al,0 jz starting cmp al,80h jz starting jnz CR6right07: mov dx,210h 。數(shù)碼管地址為210h mov al,07h 。顯示出7 out dx,al mov dx,211h 。讓數(shù)碼管第一位顯示 mov al,00000001b out dx,al mov dx,202h 。C口地址為202h mov al,00010100b 。綠燈接PC2，鳴叫 out dx,al call ring 。并且讓揚(yáng)聲器鳴叫CR7: 。復(fù)位操作的判斷（要求PA6到PA0置低）mov dx,200h in al,dx cmp al,0 jz starting cmp al,80h jz starting jnz CR7 ring proc 。讓揚(yáng)聲器鳴叫的子程序 mov dx,223h mov al,00110111b 。選擇0通道，先讀寫低字節(jié)，工作方式為3，二進(jìn)制計(jì)數(shù) out dx,al 。8253的控制口地址為223h mov al,00h 。搶答成功時(shí)，初始計(jì)數(shù)為1000H mov dx,220h out dx,al 。初始數(shù)送到0通道 mov al,10h 。再讀高字節(jié) out dx,al call delay 。設(shè)置延遲 ret ring endpring02 proc 。讓揚(yáng)聲器警報(bào)的子程序 mov dx,223h mov al,00110111b 。選擇0通道，先讀寫低字節(jié)，工作方式為3，二進(jìn)制計(jì)數(shù) out dx,al 。8253的控制口地址為223h mov al,00h 。搶答成功時(shí)，初始計(jì)數(shù)為2000H mov dx,220h out dx,al 。初始數(shù)送到0通道 mov al,20h 。再讀高字節(jié) out dx,al call delay 。設(shè)置延遲 ret ring02 endp delay proc 。延遲的子程序 push cx mov cx,0delaying:loop delaying pop cx retdelay endp code ends end start 10
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