【導(dǎo)讀】LED點陣顯示屏是一種由多個獨立的LED發(fā)光二極管封裝而成的新興的顯示器件。子顯示屏可以顯示數(shù)字或符號，通常用來顯示時間、速度、系統(tǒng)狀態(tài)等。其廣泛的應(yīng)用于醫(yī)院、機場、銀行等公共場所，所以本設(shè)計具有很強的現(xiàn)實應(yīng)用性。本設(shè)計是采用16塊8x8LED點陣顯示模塊來。組成4個16x16點陣顯示模式的設(shè)計。整個設(shè)計介紹了以單片機STC89C52為核心的控制系統(tǒng)的LED. 點陣電子顯示屏的動態(tài)設(shè)計和開發(fā)過程。通過該芯片控制八個列驅(qū)動器74HC595和兩個行驅(qū)動器。目標(biāo)是使該電子顯示屏可以能下移顯示“華農(nóng)珠江學(xué)院09自動化陳康。畢業(yè)設(shè)計”的漢字字樣。單片機點陣LED電子顯示屏設(shè)計是在指導(dǎo)老師給出的任務(wù)書并在其指導(dǎo)下完成的。硬件電路的設(shè)計。從功能和價位以及本題目要求。STC89C52RC單片機資料、74HC595芯片資料、74HC138芯片資料、74HC00芯片資料等。

　　

【正文】 //緩存數(shù)組 uchar code disp0[]= //下 移字庫 { 0xFD,0xFB,0xFB,0xFB,0xF3,0xFB,0xFB,0xFB,0xFF,0xFB,0x30,0x80,0xF7,0xFB,0xF7,0xFB, 0xF7,0xFB,0xF7,0xFB,0xF7,0xFB,0xB7,0xFB,0xD7,0xFB,0xE7,0xFB,0xF7,0xFB,0xFF,0xFB, /*計 ,0*/ 0xFD,0xFF,0x7B,0xF0,0x73,0xF7,0x7B,0xF7,0x7F,0xF7,0x7F,0xF7,0xB8,0x8F,0x5B,0xE0, 0x7B,0xEF,0x7B,0xEF,0xFB,0xF6,0xFB,0xF6,0xEB,0xF9,0xF3,0xF6,0x3B,0x8F,0xCF,0xDF, /*設(shè) ,1*/ 0xDF,0xFD,0xDF,0xFD,0xDF,0xFD,0xDF,0xDD,0xDD,0x9D,0xDB,0xCD,0xDB,0xED,0xD7,0xF5, 0xC7,0xF5,0xD7,0xF9,0xDF,0xFD,0xDF,0xFD,0xDF,0xDD,0x00,0x80,0 xFF,0xFF,0xFF,0xFF, /*業(yè) ,2*/ 0xFB,0xFE,0xFB,0xFE,0xFB,0xCE,0x83,0xF0,0xFB,0xFE,0xDB,0xBE,0xEB,0xBE,0x73,0x81, 0x7F,0xFF,0x7F,0xFF,0x00,0x80,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF, /*畢 ,3*/ 0x7F,0xFF,0xFF,0xFE,0x03,0x80,0xFB,0xFE,0x0B,0xE0,0xFB,0xEE,0x03,0x80,0xFB,0xEE, 0x0B,0xE0,0xEB,0xFE,0xDB,0xEC,0xBB,0xE4,0xDB,0xFA,0xE5,0xE6,0xAD,0x8E,0x7E,0xDF, /*康 ,4*/ 0xFF,0xFD,0xE1,0xFD,0x2D,0x80,0xED,0xFE,0x75,0xFF,0x79,0xFD,0xB5,0xFD,0x2D,0xC0, 0xED,0xFD,0xE9,0xF5,0xB5,0xED,0xBD,0xDD,0xDD,0x9D,0xED,0xBD,0x7D,0xFD,0xFD,0xFE, /*陳 ,5*/ 0xEF,0xFE,0xCF,0xFE,0xEF,0xEE,0xF7,0xCE,0xF7,0xE6,0xF3,0xF2,0xF5,0xF8,0xF6,0xFC, 0x77,0xFE,0xB7,0xFE,0xD7,0xFE,0xF7,0xDE,0xF7,0xDE,0xF7,0xDE,0xF7,0xC1,0xFF,0xFF, /*化 ,6*/ 0xFF,0xFB,0xFF,0xFB,0x81,0xFB,0xFF,0xFB,0xFF,0xC0,0x00,0xDB,0xF7,0xDB,0xF7,0xDB, 0xDB,0xDB,0xBB,0xDB,0x0D,0xDD,0xA0,0xDD,0xFD,0xDE,0x7F,0xD7,0xBF,0xEF,0xFF,0xFF, /*動 ,7*/ 28 0x7F,0xFF,0x7F,0xFE,0xBF,0xFF,0x07,0xE0,0xF7,0xEF,0xF7,0xEF,0x07,0xE0,0xF7,0xEF, 0xF7,0xEF,0xF7,0xEF,0x07,0xE0,0xF7,0xEF,0xF7,0xEF,0xF7,0xEF,0x07,0xE0,0xF7,0xEF, /*自 ,8*/ 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xE7,0xE7,0xDB,0xDB,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD, 0xBD,0x9B,0xBD,0xA7,0xBD,0xBF,0xBD,0xBF,0xDB,0xDB,0xE7,0xE3,0xFF,0xFF,0xFF,0xFF, /*09,9*/ 0xFF,0xFE,0xE0,0xFD,0x0E,0x80,0xD6,0xDF,0xFA,0xFF,0x3A,0xE0,0xF6,0xFF,0xEE,0xFF, 0x0E,0x80,0x6A,0xFB,0x76,0xFB,0x7E,0xFB,0xBE,0xBB,0xBE,0xBB,0xDE,0xBB,0xEE,0x87, /*院 ,10*/ 0x7F,0xEF,0xF7,0xCE,0xCF,0xEC,0xEF,0xF6,0x01,0x80,0xFD,0xDF,0x0E,0xE8,0xFF,0xFD, 0xFF,0xFE,0x01,0x80,0xFF,0xFE,0xFF,0xFE,0xFF,0xFE,0xFF,0xFE,0xBF,0xFE,0x7F,0xFF, /*學(xué) ,11*/ 0xFB,0xFF,0xF7,0xFF,0x37,0xC0,0xFF,0xFD,0xEE,0xFD,0xED,0xFD,0xF5,0xFD,0xF7,0xFD, 0xF7,0xFD,0xFB,0xFD,0xF8,0xFD,0xFB,0xFD,0xFB,0xFD,0x0B,0x80,0xFB,0xFF,0xFF,0xFF, /*江 ,12*/ 0xFF,0xFB,0x60,0xFB,0x7B,0xEB,0x7B,0xC0,0x7B,0xFB,0xBB,0xFB,0xE0,0xFB,0x1B,0x80, 0xFB,0xF1,0xFB,0xEA,0xE3,0xEA,0x7C,0xDB,0xBF,0x9B,0xDF,0xDB,0xEF,0xFB,0xFF,0xFB, /*珠 ,13*/ 0xBF,0xFF,0x3F,0xFF,0xBF,0xDF,0x03,0x80,0xBB,0xDF,0x5D,0xEF,0x5F,0xF7,0xCF,0xE2, 0xE7,0xFA,0xEB,0xFD,0xED,0xFB,0xEE,0xF3,0x6F,0xE7,0xAF,0x8F,0xC7,0xEF,0xEF,0xFF, /*農(nóng) ,14*/ 0xEF,0xFE,0xCF,0xEE,0xF7,0xC6,0xF3,0xF8,0x35,0xFE,0xF6,0xDE,0xF7,0xDE,0xF7,0xC1, 0x77,0xFF,0x7F,0xFF,0x01,0x80,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF, /*華 ,15*/ }。 void delay(uint x) //1ms 的延時子程序 { uint i,j。 for(i=x。i0。i) for(j=0。j125。j++) {。} } void loadline0() //下 移裝載的子程序 { uchar s。 for(s=0。s5。s++) //s 為要顯示的字?jǐn)?shù) +1 { buf[2*s]=disp0[word+32*s+2*line]。 buf[2*s+1]=disp0[word+1+32*s+2*line]。 } } void sendline0() //對于 下 移發(fā)送到 595 的子程序 { char s,p。 uchar inc,k,j。 if(move8) inc=0。 else inc=1。 Latch_port = 0。 //74HC595 鎖定輸出 ,避免數(shù)據(jù)傳輸過 //程中 ， 屏數(shù)據(jù)變化從而顯示閃爍 29 CLK_port = 0。 for(s=0+inc。s=7+inc。s++) { if(move8) j=move。 else j=move8。 k=(buf[s]j)|(buf[s+1](8j))。 //字模左邊字節(jié)左移 j 位， //右邊字節(jié)右移 j 位， 2 者 相 或 for(p=0。p8。p++) { if((kamp。0x80)!=0) DA_in_port = 1。 else DA_in_port = 0。 CLK_port = 1。 CLK_port = 0。 k= 1。 } } } } void main() { uchar j。 uchar i,y=0。 uchar han。 move=0。 word=0。 move1=1。 while(1) { while(word864) //下 移需要移動的位數(shù) { while(move16) //一個字移動十六次 for(i=0。ispeed。i++) //移動的速度 { for(line=0。line16。line++) { loadline0()。 sendline0()。 //74HC138 輸出控制 EN_port = 1。 //關(guān)屏顯示 ABCD_port = (ABCD_port amp。 0x0f)|(han4)。 //74HC138 譯碼輸出 30 han++。 if(han==16) disp_han=0。 Latch_port = 1。 // 允許 74HC595 數(shù)據(jù)輸出到 Q1Q8 //端口 EN_port = 0。 //74HC138 輸出有效，打開顯示 Latch_port = 0。 //鎖定 74HC595 數(shù)據(jù)輸出 } } move++。 } move=0。 word=word+32。 } word=0。 }