简易8人抢答器.docx

单片机小项目简易8人抢答器设计综述本抢答器是以AT89C51为核心的一个按键判断器,用两片74LS164驱动号码牌,用一片74LS240做驱动8个LED的缓存,当其中一个键被按下的时候,该选手的灯亮起,号码牌上显示选手号码,其他的按键不再生效,例如:按下K3后,D3亮,号码牌上显示03号选手.硬件图和仿真结果未开始仿真时如图所示:初始状态如图:当按下K1时:当按下K2时:当按下K3时:当按下K4时:当按下K5时:当按下K6时:当按下K7时:当按下K8时:程序代码程序代码如下:BANK0_REGEQU00H;选择第0组寄存器BANK1_REGEQU08H;选择第1组寄存器BANK2_REGEQU10H;选择第2组寄存器BANK3_REGEQU18H;选择第3组寄存器LED_MAX_BITSEQU02H;LED最大位数HD_K1_LEDEQUP2.0HD_K2_LEDEQUP2.1HD_K3_LEDEQUP2.2HD_K4_LEDEQUP2.3HD_K5_LEDEQUP2.4HD_K6_LEDEQUP2.5HD_K7_LEDEQUP2.6HD_K8_LEDEQUP2.7LED_SCLEQUP1.6LED_SDAEQUP1.7LED_DIS_BUFEQU30HORG0000HLJMPSTARTORG0100HSTART:CLREAMOVPSW,#BANK0_REGMOVSP,#0DFHMOVR0,#20HMOVR7,#60HLCALLPUB_CLEAR_RAM1;清0RAM单元LCALLLED_CLR_FULLLCALLLED_DISP_DATAMOVP3,#0FFHSTART_A:MOVA,P3ANLA,#0FFHCJNEA,#0FFH,PUDUANSJMPSTART_A;-------------------------------------------------------------PUDUAN:MOVP3,#0FFHJNBACC.0,PRO_L1_K1JNBACC.1,PRO_L1_K2JNBACC.2,PRO_L1_K3JNBACC.3,PRO_L1_K4JNBACC.4,PRO_L2_K5JNBACC.5,PRO_L2_K6JNBACC.6,PRO_L2_K7JNBACC.7,PRO_L2_K8SJMPSTART_APRO_L1_K1:MOV P2,#0FFHCLR P2.0MOVLED_DIS_BUF,#1SJMP PRO_DISPPRO_L1_K2: MOV P2,#0FFH CLR P2.1MOVLED_DIS_BUF,#2SJMP PRO_DISPPRO_L1_K3:MOV P2,#0FFHCLR P2.2MOVLED_DIS_BUF,#3SJMP PRO_DISPPRO_L1_K4:MOV P2,#0FFHCLR P2.3MOVLED_DIS_BUF,#4SJMP PRO_DISP PRO_L2_K5:MOV P2,#0FFHCLR P2.4MOVLED_DIS_BUF,#5SJMP PRO_DISPPRO_L2_K6: MOV P2,#0FFH CLR P2.5MOVLED_DIS_BUF,#6SJMP PRO_DISPPRO_L2_K7:MOV P2,#0FFHCLR P2.6MOVLED_DIS_BUF,#7SJMPPRO_DISPPRO_L2_K8:MOV P2,#0FFHCLR P2.7MOVLED_DIS_BUF,#8PRO_DISP:LCALLLED_CLR_FULLLCALLLED_DISP_DATAPRO_WAIT_KEY:LCALLKEY_READ_DELAYMOVA,P3ANLA,#0FFHXRLA,#0FFHJNZPRO_WAIT_KEYLJMPSTART_AKEY_READ_DELAY:MOVA,#10KEY_READ_DEY_A:LCALLPUB_DELAY_1MSDECAJNZKEY_READ_DEY_ARETPUB_DELAY_1MS:PUSH ACCCLR APD1_0:NOPINC ACJNE A,#0E4H,PD1_0 ;#E4H = 228DPOP ACCRETLED_DISP_BYTE:PUSHACCCLRLED_SCLMOVR7,#8LED_DISP_BYTE1:RLCAMOVLED_SDA,CNOPNOPSETBLED_SCLNOPNOPCLRLED_SCLDJNZR7,LED_DISP_BYTE1POPACCRETLED_DISP