【正文】 時候產(chǎn)生拖尾現(xiàn)象，驅(qū)動程序先要關(guān)閉顯示屏，即消隱，等顯示數(shù)據(jù)打入輸出鎖存器并鎖存，然后再輸出新的行號，重新打開顯示。 5 系統(tǒng)調(diào)試 及性能 、程序 分析 最后程序是否能正常的工作， LED 燈是否能正常的顯示出來，都要看調(diào)試是否得當(dāng)，下面就主要介紹系統(tǒng)的調(diào)試及性能，程序的分析。 調(diào)試及性能分析 LED 顯示屏硬件電路只要器件質(zhì)量可靠，管腳焊接正確，一般無需調(diào)試即可正常工作。軟件部分需要調(diào)試的主要 有顯示屏刷新頻率及顯示效果兩部分。顯示屏刷新率由定時器 T0 的溢出率和單片機的晶振頻率決定， 下 表給出了實驗調(diào)試時采用的頻率及其對應(yīng)的定時器 T0 初值。 顯示屏刷新率（幀頻）與 T0初值關(guān)系表（ 24M 晶振） 刷新率（ Hz） 25 50 75 85 100 120 T0初值 0xec78 0xf63c 0xf830 0xf97e 0xfa42 0xfb1e 0xfbee 10 程序介紹及流程 / *頭文件 */ include include define uint unsigned int define uchar unsigned char define NOP() _nop_() 定義端口 sbit EN_port = P1^3。 sbit DA_in_port = P1^2。 sbit CLK_port = P1^1。 sbit Latch_port = P1^0。 define ABCD_port P1 //HC138 ABCD 端口定義 //sbit D_port = P1^7。 //sbit C_port = P1^6。 //sbit B_port = P1^5。 //sbit A_port = P1^4。 漢字子模 uchar code ziku_table[]={ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,/*顯示 8行空白 */ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,/*顯示 8行空白 */ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 11 0xFF,0xFF,0x1F,0xFC,0xEF,0xFB,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7, 0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xEF,0xFB,0x1F,0xFC,0xFF,0xFF,/*X,0*/ 0xFF,0xFF,0x1F,0xFC,0xEF,0xFB,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xF7,0xEF,0xF3, 0x1F,0xF4,0xFF,0xF7,0xFF,0xF7,0xF7,0xF7,0xF7,0xF7,0xEF,0xFB,0x1F,0xFC,0xFF,0xFF,/*X,1*/ 0xFF,0xFF,0x0F,0xF8,0xF7,0xF7,0xF7,0xF7,0xFF,0xF7,0xFF,0xFB,0xFF,0xFD,0x7F,0xFE, 0xFF,0xFD,0xFF,0xFB,0xFF,0xF7,0xFF,0xF7,0xF7,0xF7,0xF7,0xFB,0x0F,0xFC,0xFF,0xFF,/*X,2*/ 0xFF,0xFF,0x7F,0xFE,0xBF,0xFE,0xBF,0xFE,0xBF,0xFE,0xDF,0xFE,0xDF,0xFE,0xEF,0xFE, 0xEF,0xFE,0xF7,0xFE,0xFB,0xFE,0x03,0xF0,0xFF,0xFE,0xFF,0xFE,0x3F,0xF8,0xFF,0xFF,/*X,3*/ 0xFF,0xFF,0x7F,0xFF,0x3F,0xFF,0x5F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF, 0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x1F,0xFC,0xFF,0xFF,/*X,4*/ 0xFF,0xFF,0x0F,0xF8,0xF7,0xF7,0xF7,0xF7,0xFF,0xF7,0xFF,0xFB,0xFF,0xFD,0x7F,0xFE, 0xFF,0xFD,0xFF,0xFB,0xFF,0xF7,0xFF,0xF7,0xF7,0xF7,0xF7,0xFB,0x0F,0xFC,0xFF,0xFF,/*X,2*/ 0xFF,0xFF,0x0F,0xF8,0xF7,0xF7,0xF7,0xF7,0xFF,0xF7,0xFF,0xFB,0xFF,0xFD,0x7F,0xFE, 0xFF,0xFD,0xFF,0xFB,0xFF,0xF7,0xFF,0xF7,0xF7,0xF7,0xF7,0xFB,0x0F,0xFC,0xFF,0xFF,/*X,2*/ 12 0xFF,0xFF,0x0F,0xF8,0xF7,0xF7,0xF7,0xF7,0xFF,0xF7,0xFF,0xFB,0xFF,0xFD,0x7F,0xFE, 0xFF,0xFD,0xFF,0xFB,0xFF,0xF7,0xFF,0xF7,0xF7,0xF7,0xF7,0xFB,0x0F,0xFC,0xFF,0xFF,/*X,2*/ 0xBD,0xFF,0xBB,0x83,0xDB,0xBB,0xEF,0xDB,0x01,0xDA,0xEF,0xEB,0xEF,0xEB,0x00,0xDA， 0xEF,0xBB,0xCF,0xBB,0xB7,0xBB,0x77,0xA3,0x7B,0xDB,0xFC,0xFB,0xFF,0xFB,0xFF,0xFB,/*X,0*/ 0x7F,0xFF,0x77,0xF7,0x6F,0xFB,0x03,0x80,0xFB,0xDF,0xFD,0xEF,0x0F,0xF8,0xEF,0xFB, 0xEF,0xFB,0x0F,0xF8,0xDF,0xFD,0xDF,0xDD,0xEF,0xDD,0xEF,0xDD,0xF7,0xC3,0xF9,0xFF,/*X,1*/ 0xFF,0xFF,0x03,0x80,0xBB,0xBF,0x3D,0xDF,0xDD,0xF7,0x03,0xE0,0xDF,0xFF,0x6F,0xFF, 0x6F,0xF7,0x07,0xE0,0x7F,0xFF,0x7F,0xDF,0x01,0x80,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,/*X,2*/ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,/*顯示 8行空白 */ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,/*顯示 8行空白 */ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, }。 13 開中斷 圖 51中斷流程圖