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W1EEX55OE2EUG[MZJPR$W)V.png (25.77 KB, 下載次數(shù): 89)
| 這是我借鑒過來的程序就改了 RS RW E 的引腳 #include <reg51.h> #define LCD1602_DB P0 sbit LCD1602_RS = P2^0; sbit LCD1602_RW = P2^1; sbit LCD1602_E = P2^2; bit flagT0 = 0; //T0中斷產(chǎn)生標(biāo)志 unsigned char T0RH = 0; //T0重載值的高字節(jié) unsigned char T0RL = 0; //T0重載值的低字節(jié) unsigned char code str1[] = "Kingst Studio"; //待顯示的第一行字符串 unsigned char code str2[] = "Let's move..."; //待顯示的第二行字符串，需保持與第一行字符串等長，較短的行可用空格補齊 void ConfigTimer0(unsigned int ms); void LcdShowStr(unsigned char x, unsigned char y, const unsigned char *str, unsigned char len); void LcdInit(); void main () { unsigned char i; unsigned char iMove = 0; //移動索引 unsigned int tmrMove = 0; //屏幕移動定時器 unsigned char pdata bufMove1[16 + sizeof(str1) + 16]; //移動顯示的緩沖區(qū) unsigned char pdata bufMove2[16 + sizeof(str1) + 16]; //移動顯示的緩沖區(qū) EA = 1; //開總中斷 ConfigTimer0(10); //配置T0定時10ms LcdInit(); //初始化液晶 for (i=0; i<16; i++) //緩沖區(qū)開頭一段填充為空格 { bufMove1[ i] = ' '; bufMove2[ i] = ' '; } for (i=0; i<(sizeof(str1)-1); i++) //待顯示字符串拷貝到緩沖區(qū)中間位置 { bufMove1[16+i] = str1[ i]; bufMove2[16+i] = str2[ i]; } for (i=(16+sizeof(str1)-1); i<sizeof(bufMove1); i++) //緩沖區(qū)結(jié)尾一段也填充為空格 { bufMove1[ i] = ' '; bufMove2[ i] = ' '; } while(1) { if (flagT0) { flagT0 = 0; tmrMove += 10; if (tmrMove >= 500) //每500ms移動一次屏幕 { tmrMove = 0; LcdShowStr(0, 0, bufMove1+iMove, 16); //從緩沖區(qū)抽出需顯示的一段字符顯示到液晶上 LcdShowStr(0, 1, bufMove2+iMove, 16); iMove++; //移動索引遞增，實現(xiàn)左移 if (iMove >= (16+sizeof(str1)-1)) //起始位置達(dá)到字符串尾部后即返回從頭開始 { iMove = 0; } } } } } void ConfigTimer0(unsigned int ms) //T0配置函數(shù) { unsigned long tmp; tmp = 11059200 / 12; //定時器計數(shù)頻率 tmp = (tmp * ms) / 1000; //計算所需的計數(shù)值 tmp = 65536 - tmp; //計算定時器重載值 tmp = tmp + 12; //修正中斷響應(yīng)延時造成的誤差 T0RH = (unsigned char)(tmp >> 8); //定時器重載值拆分為高低字節(jié) T0RL = (unsigned char)tmp; TMOD &= 0xF0; //清零T0的控制位 TMOD |= 0x01; //配置T0為模式1 TH0 = T0RH; //加載T0重載值 TL0 = T0RL; ET0 = 1; //使能T0中斷 TR0 = 1; //啟動T0 } void LcdWaitReady() //等待液晶準(zhǔn)備好 { unsigned char sta; LCD1602_DB = 0xFF; LCD1602_RS = 0; LCD1602_RW = 1; do { LCD1602_E = 1; sta = LCD1602_DB; //讀取狀態(tài)字 LCD1602_E = 0; } while (sta & 0x80); //bit7等于1表示液晶正忙，重復(fù)檢測直到其等于0為止 } void LcdWriteCmd(unsigned char cmd) //寫入命令函數(shù) { LcdWaitReady(); LCD1602_RS = 0; LCD1602_RW = 0; LCD1602_E = 1; LCD1602_DB = cmd; LCD1602_E = 0; } void LcdWriteDat(unsigned char dat) //寫入數(shù)據(jù)函數(shù) { LcdWaitReady(); LCD1602_RS = 1; LCD1602_RW = 0; LCD1602_E = 1; LCD1602_DB = dat; LCD1602_E = 0; } void LcdInit() //液晶初始化函數(shù) { LcdWriteCmd(0x38); //16*2顯示，5*7點陣，8位數(shù)據(jù)接口 LcdWriteCmd(0x0C); //顯示器開，光標(biāo)關(guān)閉 LcdWriteCmd(0x06); //文字不動，地址自動+1 LcdWriteCmd(0x01); //清屏 } void LcdShowStr(unsigned char x, unsigned char y, const unsigned char *str, unsigned char len) // 顯示字符串，屏幕起始坐標(biāo)(x,y)，字符串指針str，需顯示長度len { unsigned char addr; //由輸入的顯示坐標(biāo)計算顯示RAM的地址 if (y == 0) { addr = 0x00 + x; //第一行字符地址從0x00起始 } else { addr = 0x40 + x; //第二行字符地址從0x40起始 } //由起始顯示RAM地址連續(xù)寫入字符串 LcdWriteCmd(addr | 0x80); //寫入起始地址 while (len--) //連續(xù)寫入字符串?dāng)?shù)據(jù) { LcdWriteDat(*str); str++; } } void InterruptTimer0() interrupt 1 //T0中斷服務(wù)函數(shù) { TH0 = T0RH; //定時器重新加載重載值 TL0 = T0RL; flagT0 = 1; } |
W1EEX55OE2EUG[MZJPR$W)V.png (25.77 KB, 下載次數(shù): 89)
楊雪飛 發(fā)表于 2017-8-9 22:28
對比度沒有設(shè)置好？還是沒有控制？
nhmvvvv 發(fā)表于 2017-8-11 01:44
看看ascii碼，你要將你顯示的數(shù)據(jù)加上 0x30 就正常了
實例61 LCD1602顯示屏顯示.rar
(49.26 KB, 下載次數(shù): 20)
zl2168 發(fā)表于 2017-8-11 19:45
實例67 LCD1602顯示屏顯示
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