【正文】 T3,02H 。 LCALL DELAY3 。30H基本指令操作 LCALL SEND_I 。時(shí)鐘信號(hào)PSB EQU 。因?yàn)檫@個(gè)課設(shè)是個(gè)非常貼近生活的內(nèi)容所以說(shuō)這個(gè)課設(shè)不僅是對(duì)我所學(xué)知識(shí)的考察更具有非常強(qiáng)的實(shí)用性。顯示圖形5 23 LCALL PHO_DISP LCALL DELAY MOV DPTR,TAB6 。顯示圖形2 13 圖形個(gè)數(shù)待定 LCALL PHO_DISP LCALL DELAY MOV DPTR,TAB3 。外接晶體引腳。 這40條引腳可分為I/O接口線(xiàn)、電源線(xiàn)、控制線(xiàn)、外接晶體線(xiàn)4部分。數(shù)據(jù)存儲(chǔ)器(RAM)AT89S51內(nèi)部有128個(gè)8位用戶(hù)數(shù)據(jù)存儲(chǔ)單元和128個(gè)專(zhuān)用寄存器單元，它們是統(tǒng)一編址的，專(zhuān)用寄存器只能用于存放控制指令數(shù)據(jù)，用戶(hù)只能訪(fǎng)問(wèn)，而不能用于存放用戶(hù)數(shù)據(jù)，所以，用戶(hù)能使用的RAM只有128個(gè)，可存放讀寫(xiě)的數(shù)據(jù)，運(yùn)算的中間結(jié)果或用戶(hù)定義的字型表。此交通燈系統(tǒng)工作過(guò)程分為2個(gè)狀態(tài)。此階段的主要特征是：一方面發(fā)展16位單片機(jī)，32位單片機(jī)及專(zhuān)用型單片機(jī)；另一方面不斷完善高檔8位單片機(jī)，改善其結(jié)構(gòu)，增加片內(nèi)器件，以滿(mǎn)足不同的客戶(hù)要求。 1971年微處理器研制成功不久，就出現(xiàn)了單片微型計(jì)算機(jī)即單片機(jī)，但最早的單片機(jī)是1位的，處理能力有限。當(dāng)東西走向的綠燈亮起時(shí)，自行車(chē)道的自行車(chē)指示車(chē)轱轆旋轉(zhuǎn)，人行道的小人指示呈現(xiàn)行走狀態(tài)。摘 要本系統(tǒng)由單片機(jī)、LCD顯示、交通燈演示系統(tǒng)三個(gè)部分組成。南北走向的紅綠燈亮起時(shí)與東西走向的原理相同，南北紅則東西綠。 圖1 單片機(jī)芯片示意圖 單片機(jī)的發(fā)展單片機(jī)的發(fā)展分為4個(gè)階段： 第一階段（1974—76年）：?jiǎn)纹瑱C(jī)初級(jí)階段。 圖2 單片機(jī)芯片實(shí)物圖3設(shè)計(jì)方案及硬件介紹 設(shè)計(jì)原理本設(shè)計(jì)使用的是單片機(jī)作為核心的控制元件，使得電路的可靠性比較高，功能也比較強(qiáng)大，而且可以隨時(shí)更新系統(tǒng)，根據(jù)道路情況適時(shí)調(diào)整交通燈的狀態(tài)，全面有效地利用交通燈指示交通情況。狀態(tài)1南北方向綠燈亮，東西方向紅燈亮，南北方向自行車(chē)與小人指示呈現(xiàn)運(yùn)動(dòng)狀態(tài)，東西方向自行車(chē)和小人呈現(xiàn)停止?fàn)顟B(tài)。程序存儲(chǔ)器(ROM)AT89S51共有4KB掩膜ROM，最大可擴(kuò)展64K字節(jié)，用于存放用戶(hù)程序，原始數(shù)據(jù)或表格。 89S51單片機(jī)為雙列直插式封裝結(jié)構(gòu), 如下圖所示。 控制線(xiàn)AT89S51單片機(jī)的控制線(xiàn)有以下幾種：（1） RST：復(fù)位輸入端，高電平有效。顯示圖形3 13 圖形個(gè)數(shù)待定 LCALL PHO_DISP LCALL DELAY DJNZ R4,LGS1 。顯示圖形6 12 LCALL PHO_DISP LCALL DELAY DJNZ R4,lop LJMP l 。通過(guò)此次的課設(shè)，我學(xué)到了很多知識(shí)，跨越了傳統(tǒng)方式下的教與學(xué)的體制束縛，通過(guò)查資料和搜集有關(guān)的文獻(xiàn)，培養(yǎng)了自學(xué)能力和動(dòng)手能力。行列選RST EQU 。寫(xiě)指令子程序,基本指令操作 MOV A,01H 。循環(huán)次數(shù)待定 MOV R4,6lop: MOV P1,21H 。全屏顯示圖形子程序 MOV LCD_X,80HPHO_DISP1: MOV LCD_Y,80H MOV COUNT2,20HPHO_DISP2: MOV COUNT1,10H LCALL WR_ZBPHO_DISP3: CLR A MOVC A,A+DPTR LCALL SEND_D INC DPTR DJNZ COUNT1,PHO_DISP3 INC LCD_Y DJNZ COUNT2,PHO_DISP2 MOV LCD_X,88H DJNZ COUNT3,PHO_DISP1 MOV A,36H LCALL SEND_I 。$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$WR_ZB: MOV A,34H LCALL SEND_I 。$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$。寫(xiě)指令SETB_RS: CLR SCLK SETB SCLK CLR STD 。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,0CH,01H,00H,00H,00H,0E3H,80H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,41H,08H,20H,00H,00H,2AH,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,0E0H,00H,00H,01H,10H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,02H,03H,40H,00H,0CH,0D5H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,06H,00H,0C0H,00H,01H,0F0H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,0CH,01H,00H,00H,00H,0E3H,80H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,41H,08H,20H,00H,00H,2AH,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,0E0H,00H,00H,01H,10H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,02H,03H,40H,00H,0CH,91H,80H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,03H,00H,60H,00H,00H,01H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,0CH,01H,00H,00H,00H,0E3H,80H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,41H,08H,20H,00H,00H,2AH,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,0E0H,00H,00H,01H,10H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,02H,03H,40H,00H,06H,51H,80H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,07H,00H,0E0H,00H,01H,0F1H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,0CH,01H,00H,00H,00H,23H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,01H,00H,20H,00H,01H,4AH,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,0E0H,00H,00H,01H,10H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,02H,03H,40H,00H,0AH,0AH,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,07H,00H,0E0H,00H,01H,0B0H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,0CH,01H,00H,00H,00H,23H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,41H,08H,20H,00H,01H,42H,80H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,0E0H,00H,00H,01H,10H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,02H,00H,20H,00H,00H,0E0H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,41H,08H,20H,00H,05H,00H,0A0H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,08H,0C1H,00H,00H,00H,0ABH,40H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,07H,00H,0E0H,00H,01H,50H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,02H,00H,20H,00H,00H,E0H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,40H,08H,00H,00H,05H,0AH,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,08H,0C1H,00H,00H,00H,0ABH,40H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,07H,00H,0E0H,00H,00H,68H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,02H,00H,20H,00H,00H,0F0H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H。DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H