畢業設計-基于80c51單片機控制的大屏幕顯示32215256點陣(編輯修改稿)

　

【文章內容簡介】 P2口的口線 ~。 II、數據線的連接 外部程序存儲器 8位數據線 D0~D7與 P0口的口線 ~。 III、控制線的連接 RD(單片機片外數據讀信號 )和 RD(數據存儲器讀信號 )相連； ALE(單片機地址鎖存允許信號 )和 G(地址鎖存器鎖存信號 )相連； WR(單片機片外數據寫信號 )和 WE(數據存儲器寫信號 )相連； 單片機的相關地址線經過線譯碼或地址譯碼和數據存儲器的片選信號相連。 采用 16 位地址線尋址外部數據區，這時可尋址空間為 64KB，采用下面 8位尋址指令來讀、寫此數據存儲區： MOVX A,@DPTR MOVX @DPTR,A 當外部 RAM容量較大 (大于 256B)時 ,采用此尋址方法。下圖即為 80c51與 62256 的連接圖。 綜合程序存儲器與數據存儲器，可以畫出存儲模塊的原理圖如下。 第 13 頁 共 24 頁 字模的制作與保存 本次設計設計的字模（ 32 32）都是使用 PCtoLCD2022 軟件來獲取的；如圖所示，為本次取字的字模。 取字原理：由于采用共陰極的 LED 顯示模塊，故在取字符時，取字符陰碼，即點亮 LED燈的信號為 1。取模順序是從左到右，逐行取位，即第一個點作為最高位。每取 8個點作為一個字節。取字的字體由軟件寫入時的字體決定，每個 LED燈的亮滅都是由一個數位來標志的。 以下為用 PCtoLCD2022 取的“太師學院計算機系”的字模： 太 (0) 師 (1) 學 (2) 院 (3) 計 (4) 算 (5) 機 (6) 系 (7) {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x03,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x03,0x00,0x00}, {0x00,0x03,0x00,0x00,0x00,0x03,0x00,0x10,0x00,0x03,0x00,0x38,0x1F,0xFF,0xFF,0xC0,0x00,0x03,0x40,0x00,0x00,0x03,0x40,0x00,0x00,0x02,0x40,0x00,0x00,0x06,0x20,0x00}, {0x00,0x06,0x20,0x00,0x00,0x06,0x10,0x00,0x00,0x0C,0x10,0x00,0x00,0x0C,0x18,0x00,0x00,0x18,0x0C,0x00,0x00,0x18,0x0C,0x00,0x00,0x34,0x06,0x00,0x00,0x33,0x03,0x00}, {0x00,0x61,0x83,0x80,0x00,0xC1,0xC1,0xC0,0x01,0x80,0xE0,0xF0,0x03,0x00,0x40,0x78,0x0C,0x00,0x00,0x3E,0x18,0x00,0x00,0x10,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*太 ,0*/ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x60,0x00,0x18,0x00,0x40,0x00,0x3C,0x00,0x47,0xFF,0xC0,0x10,0x40,0x08,0x00,0x0C,0x40,0x08,0x00}, {0x08,0x40,0x08,0x00,0x08,0x40,0x08,0x00,0x08,0x46,0x08,0x18,0x08,0x47,0xFF,0xF8,0x08,0x46,0x08,0x10,0x08,0x46,0x08,0x10,0x08,0x46,0x08,0x10,0x08,0xC6,0x08,0x10}, {0x08,0xC6,0x08,0x10,0x08,0xC6,0x08,0x10,0x08,0xC6,0x08,0x10,0x08,0xC6,0x08,0x10,0x08,0x86,0x08,0x10,0x08,0x86,0x08,0x10,0x09,0x86,0x08,0x10,0x11,0x86,0x09,0xF0}, {0x01,0x06,0x08,0x70,0x03,0x06,0x08,0x20,0x02,0x00,0x08,0x00,0x04,0x00,0x0C,0x00,0x08,0x00,0x0C,0x00,0x10,0x00,0x0C,0x00,0x20,0x00,0x0C,0x00,0x00,0x00,0x00,0x00},/*師 ,1*/ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x01,0x00,0x01,0x06,0x01,0x80,0x01,0x83,0x03,0x80,0x00,0xC3,0x83,0x00,0x00,0xE1,0x86,0x00,0x00,0x61,0x84,0x00}, {0x00,0x61,0x88,0x00,0x00,0x40,0x08,0x08,0x07,0xFF,0xFF,0xFC,0x0C,0x00,0x00,0x1C,0x0C,0x00,0x00,0x30,0x1C,0x00,0x00,0x60,0x38,0x00,0x06,0x00,0x11,0xFF,0xFF,0x00}, {0x00,0x00,0x1C,0x00,0x00,0x00,0x30,0x00,0x00,0x00,0x40,0x00,0x00,0x01,0x80,0x00,0x00,0x01,0x80,0x30,0x3F,0xFF,0xFF,0xF8,0x00,0x01,0x80,0x00,0x00,0x01,0x80,0x00}, 第 14 頁 共 24 頁 {0x00,0x01,0x80,0x00,0x00,0x01,0x80,0x00,0x00,0x01,0x80,0x00,0x00,0x01,0x80,0x00,0x00,0x1F,0x80,0x00,0x00,0x07,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00},/*學 ,2*/ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00,0x00,0x00,0x18,0x00,0x08,0x30,0x1C,0x00,0x0F,0xF0,0x0C,0x00,0x08,0x60,0x08,0x30,0x08,0x67,0xF7,0xF8}, {0x08,0x44,0x00,0x30,0x08,0xCC,0x00,0x20,0x08,0x9C,0x00,0x40,0x08,0x80,0x00,0x80,0x09,0x01,0xFF,0xC0,0x08,0x80,0x00,0x00,0x08,0x40,0x00,0x00,0x08,0x60,0x00,0x00}, {0x08,0x30,0x00,0x30,0x08,0x37,0xFF,0xF8,0x08,0x10,0x62,0x00,0x08,0x10,0x62,0x00,0x08,0x30,0x62,0x00,0x0B,0xF0,0x62,0x00,0x08,0xE0,0x42,0x00,0x08,0x40,0x42,0x08}, {0x08,0x00,0xC2,0x08,0x08,0x00,0x82,0x08,0x08,0x01,0x82,0x08,0x08,0x03,0x02,0x0C,0x08,0x06,0x03,0xFC,0x08,0x18,0x03,0xF8,0x08,0x60,0x00,0x00,0x00,0x00,0x00,0x00},/*院 ,3*/ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x00,0x18,0x00,0x03,0x80,0x1C,0x00,0x01,0xC0,0x18,0x00,0x00,0xC0,0x18,0x00,0x00,0xC0,0x18,0x00}, {0x00,0x00,0x18,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x18,0x18,0x01,0x9F,0xFF,0xFC,0x3F,0x80,0x18,0x00,0x01,0x00,0x18,0x00}, {0x01,0x00,0x18,0x00,0x01,0x00,0x18,0x00,0x01,0x00,0x18,0x00,0x01,0x00,0x18,0x00,0x01,0x02,0x18,0x00,0x01,0x04,0x18,0x00,0x01,0x08,0x18,0x00,0x01,0x10,0x18,0x00}, {0x01,0x20,0x18,0x00,0x01,0x60,0x18,0x00,0x01,0xC0,0x18,0x00,0x03,0x80,0x18,0x00,0x01,0x80,0x18,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x00,0x00},/*計 ,4*/ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x18,0x00,0x01,0xC0,0x18,0x00,0x01,0x80,0x10,0x08,0x03,0x03,0x30,0x1C,0x03,0xFC,0x2F,0xE0,0x06,0x10,0x40,0xC0}, {0x04,0x18,0x80,0xC0,0x09,0x19,0x01,0x40,0x11,0xFF,0xFF,0x80,0x11,0x80,0x01,0x00,0x21,0x80,0x01,0x00,0x01,0xFF,0xFF,0x00,0x01,0x80,0x01,0x00,0x01,0x80,0x01,0x00}, {0x01,0xFF,0xFF,0x00,0x01,0x80,0x01,0x00,0x01,0x80,0x01,0x00,0x01,0x80,0x01,0x00,0x01,0xFF,0xFF,0x00,0x01,0x98,0x08,0x00,0x00,0x18,0x08,0x00,0x00,0x18,0x08,0x18}, {0x3F,0xFF,0xFF,0xFC,0x00,0x10,0x18,0x00,0x00,0x30,0x18,0x00,0x00,0x60,0x18,0x00,0x00,0xC0,0x18,0x00,0x03,0x80,0x18,0x00,0x0C,0x00,0x18,0x00,0x00,0x00,0x00,0x00},/*算 ,5*/ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x80,0x00,0x00,0x01,0x80,0x00,0x00,0x01,0x81,0x00,0x80,0x01,0x81,0xFF,0xC0,0x01,0x81,0x81,0x80,0x01,0x81,0x81,0x80}, {0x01,0x81,0x81,0x80,0x01,0x99,0x81,0x80,0x3F,0xE1,0x81,0x80,0x01,0x81,0x81,0x80,0x03,0x81,0x81,0x80,0x03,0x81,0x81,0x80,0x03,0xC1,0x81,0x80,0x03,0xB1,0x81,0x80}, {0x07,0x99,0x81,0x80,0x05,0x9D,0x81,0x80,0x05,0x89,0x81,0x80,0x0D,0x81,0x81,0x80,0x09,0x81,0x81,0x80,0x11,0x81,0x81,0x80,0x11,0x81,0x01,0x80,0x21,0x83,0x01,0x80}, {0x41,0x83,0x01,0x88,0x41,0x86,0x01,0x88,0x01,0x84,0x01,0x8C,0x01,0x8C,0x01,0x8C,0x01,0x88,0x01,0xFC,0x01,0x90,0x00,0xF8,0x01,0xA0,0x00,0x00,0x00,0x00,0x00,0x00},/*機 ,6*/ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0x00,0x00,0x0F,0xF0,0x00,0x03,0xFC,0x00,0x03,0xFD,0x00,0x00,0x0C,0x03,0xC0,0x00,0x00,0x07,0x00,0x00}, {0x00,0x0C,0x03,0x00,0x00,0x18,0x07,0x80,0x00,0x60,0x0E,0x00,0x01,0xBF,0xF8,0x00,0x01,0xF0,0x60,0x00,0x00,0x00,0xC0,0x00,0x00,0x03,0x04,0x00,0x00,0x0C,0x03,0x00}, 第 15 頁 共 24 頁 {0x00,0x38,0x01,0xC0,0x00,0xE0,0x0F,0xE0,0x03,0xFF,0xF0,0x70,0x01,0xC0,0xC0,0x30,0x00,0x00,0xC0,0x20,0x00,0x10,0xC8,0x00,0x00,0x38,0xC6,0x00,0x00,0x60,0xC1,0x80}, {0x00,0xC0,0xC0,0xE0,0x01,0x80,0xC0,0x70,0x02,0x00,0xC0,0x38,0x0C,0x00,0xC0,0x38,0x10,0x18,0xC0,0x18,0x20,0x07,0xC0,0x00,0x00,0x01,0x80,0x00,0x00,0x00,0x00,0x00},/*系 ,7*/ 每個 LED 燈的亮滅都是由一個數位來標志的，那么存儲一個漢字 需要的空間就有： 32 32﹦ 1024b﹦ 128B；存儲 8個漢字就需要 1K 的空間。本次設計中使用的 62256可存儲的漢字字數是 256個。 當存儲的漢字較多時，比如顯示廣告或顯示其他信息時，需要的空間就迅速上升；而 80c51內部的存儲空間是有限的，故需要對數據存儲器進行擴展，使字庫存儲在片外的存儲器上。另外，由于系統需要調用的程序和數據比較多，所以在外部