序号 名称 型号 数量(个) 20 电解电容 22uF 3 21 瓷片电容 33pF 3 22 排阻 10K 3 23 排阻 470 3 24 短路冒 3 25 杜邦线8P 3 26 PCB板子 3 27 固定螺钉螺帽 3mm 3 28 USB下载线 3
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1GND20P10P11P12P13P14P15P16P17470P05R3470P04R4470P03R5P02R647087654321470P00R8ISP8abcdefgdp2J1393837363534333287654321470P06R2ISP8J587654321ISP8ISP8ISP8P20P21P22P23P24P25P26P278765432187654321P01R7P30P31P32P33P34P35P36P37P20P21P22P23P24P25P26P27P30P31P32P33P34P35P36P37470ISP8J6ISP8J7ISP8J887654321876543218765432121222324252627281011403130291173J4P10P11P12P13P14P15P16P17470P07R14U1GNDP0.0AT89S52P0.1P1.0P0.2P1.1P0.3P1.2P0.4P1.3P0.5P1.4P1.5P0.6P1.6P0.7P1.7P2.0P2.1P3.2(INT0)P2.2P3.3(INT1)P2.3P2.4P3.4(T0)P2.5P3.5(T1)P2.6P2.7X2P3.0(RXD)X1P3.1(TXD)RESCETVCCEA/VPPP3.7(RD)ALE/PROGP3.6(WD)PSEN110J2P00P01P02P03P04P05P06P07P10P11P12P13P14P15P16P17P00P01P02P03P04P05P06P07J3AP20P21P22P23P24P25P26P27P30P31VCCALEPSEN12345678P00P01P02P03P04P05P06P07J23470流水灯电路VCC987654321J2612LSDAP3212P3313P3414P3515XT218XT119RET9P3717P3616D2D3D4D5D6D7D8D9LEDLEDLEDLEDLEDLEDLEDLEDP37P36P35P34P33P32P31P3011711042534253VCCLED1SMG4abcdefgdp排针C1J14987654321J16321RSTR10200C51复位电路VCCR111KAVRLED2SMG2R311KAT89C52BJ11987654321S1C51VCC10KVCC10KVCCJ21V+12VCCV-GGND33PFJ28GND+D-DVCCUSBVCCUSB接口J3121VCCDVCC21GNDGNDSTCJ29432112344321GNDCLKDATAGNDCLKDATAGNDC433PFVCCT1P1512RET3P174V+P165P31P30GNDMOSINCRSTSCKMISOXZKVCCGNDGNDGNDGND10987612S4C233PFGNDS2AVRAVR复位电路U2GND1P272P263P254P245P236P227P218P209GND10OE1D2D3D4D5D6D7D8DGNDVCC1Q2Q3Q4Q5Q6Q7Q8QG74LS573KG1-220191817161514131211VCCP1010K10K上拉排阻S5KEG1-2P11S3KG6VCCD1LEDR121KS6C3KEG1-2P12CS7XT1VCCJZ112MXT274LS573KEG1-2P13C电源S8KEG1-2P14附录B 电路原理图
J27USBFEMALE数码管电路晶振电路J251S9J221KEG1-2J201P15J191J181J171J151J101J91J321J331S10KEG1-2P16V+P35T1测试USB接口J30P34T0测试P33INT1测试P32INT0测试XT1RETALEGNDVCCGNDV+S11KEG1-2P17独立键盘电路TitleGND下载电路GND重要测试电路SizeA4Date:File:123Number电子价格牌1DRevision12017/1/2C:\\Users\\..\\电子价格牌原理图.SchDocSheet of1Drawn By:自本1401董国栋4 22
振源测试复位测试ALE测试P00P01P02P03P04P05P06P07J12987654321P10P11P12P13P14P15P16P17987654321P20P21P22P23P24P25P26P27P30P31P32P33P34P35P36P3722UF1KJ13VCCC51GNDd1d2d3d4d1d2d3P31d43单片机最小系统R9J249012Q12PNP211BFMQC51RETAVR9869812126LS1GND蜂鸣电路LS
地测试正电源测试下载口测试下载口VCC测试附录C 实物图
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附录D 程序清单
/*项目名称:电子价格牌*/ /*设 计 者:董国栋*/ /*时 间:2016年12月 */
/*项目功能:设计一个能显示四种不同房型价格的电子价格表。*/ /*项目所以单片机资源：P0口接输出数码管段控信号；
P2口接输出数码管位控信号； P1口接按键；
P3口接输出数码管位控信号； 晶振12MHz；
按键1：P1.0，启动/清零； 按键2：P1.1，输入控制左移一位； 按键3：P1.2，修改数字； 按键4：P1.3，输入控制右移一位；
按键5：P1.4，连续修改数字；
60H到70H用于显示器缓冲地址；
堆栈栈底：30H。*/
/*项目所用的显示模块：四个四位一体数码管；*/
/************************主程序******************************/
ORG 0000H
LJMP MAIN ORG 0100H
#00H
MAIN: MOV SP,#30H MOV MOV MOV
PSW,
R0, #20H R7, #95
#00H ； 将00H赋给R0
QINGLING: MOV @R0, INC
R0 ；将RAM清零
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DJNZ R7, QINGLING
LCALL
XIANP ；跳转到显示P.的程序
/*****************************键扫描程序****************************/
LOOP: LCALL DIR CLR P2.7 LCALL DIR2 CLR P3.7
JNB P1.0, KEY1 JNB P1.1, KEY2 JNB P1.2, KEY3 JNB P1.3, KEY4 JNB P1.4, KEY5 LJMP LOOP
/**********************开启电子价格牌并清零每位********************/
KEY1: MOV R1, #5FH ；将R1赋值5FH位数值的修改做准备 MOV R0, #60H HUILAI: MOV A, #00H
MOV @R0, A ；将60H到70H的值赋00H，所有位 INC R0 显示0 CJNE R0, #70H, HUILAI
LJMP LOOP
/*******************控制位左移显示P.********************************/
KEY2: LCALL XIAODOU2 ；消抖过程中R1加一 MOV @R1, #0AH ；将P.段控码送给缓冲地址
MOV A, #0AH
CJNE R1, #70H, FANHUI2 ；确保修改位不超过缓冲范围 MOV R1, #60H MOV @R1, #0AH
/********************消抖程序**************************/
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