微控制器技術(shù)課程設(shè)計(jì)--6點(diǎn)陣led廣告屏(編輯修改稿)
2025-02-12 15:24 本頁面
【文章內(nèi)容簡介】 31,0x30,0x13,0x10,0x09,0xFE,0x7F,0x02,0x20,0xF1,0x17,0x00,0x02,0x00,0x01,0xFE,0x7F,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x40,0x01,0x80,0x00,/學(xué),7/0x80,0x00,0x80,0x00,0x80,0x00,0x80,0x00,0x80,0x00,0xFF,0x7F,0x80,0x00,0x40,0x01,0x40,0x01,0x40,0x02,0x20,0x02,0x20,0x04,0x10,0x08,0x08,0x18,0x04,0x70,0x02,0x20,/大,6/0x08,0x04,0x08,0x04,0x08,0x04,0xBF,0x7F,0x08,0x04,0x28,0x04,0x98,0x3F,0x8C,0x10,0x0B,0x11,0x08,0x09,0x08,0x06,0x08,0x06,0x08,0x09,0x88,0x70,0x6A,0x20,0x04,0x00,/技,5/0x60,0x10,0x1E,0x11,0x10,0x12,0x10,0x12,0x7F,0x10,0x18,0x11,0x38,0x12,0x54,0x12,0x14,0x70,0x12,0x1E,0xD1,0x11,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,/科,4/0x80,0x00,0x40,0x00,0xF8,0x0F,0x08,0x08,0xF8,0x0F,0x08,0x08,0xF8,0x0F,0x08,0x08,0xF8,0x0F,0x00,0x00,0x90,0x00,0x14,0x21,0x14,0x49,0x16,0x48,0xE0,0x0F,0x00,0x00,/ 息,3/0x10,0x01,0x30,0x06,0x18,0x02,0xE8,0x7F,0x0C,0x00,0xCC,0x1F,0x0A,0x00,0xC9,0x1F,0x08,0x00,0xC8,0x1F,0x48,0x10,0x48,0x10,0x48,0x10,0xC8,0x1F,0x48,0x10,0x00,0x00,/信,2/0x40,0x00,0x80,0x10,0xFE,0x3F,0x00,0x00,0x00,0x00,0xF8,0x0F,0x08,0x08,0x08,0x08,0xF8,0x0F,0x80,0x00,0x90,0x0C,0x98,0x18,0x8C,0x30,0x82,0x10,0xA0,0x00,0x40,0x00,/京,1/0x20,0x02,0x20,0x02,0x20,0x02,0x20,0x22,0x20,0x72,0x3E,0x1A,0x20,0x06,0x20,0x02,0x20,0x02,0x20,0x02,0x30,0x02,0x2C,0x42,0x27,0x42,0x22,0x42,0x20,0x7C,0x00,0x00,/北,0/}。 實(shí)驗(yàn)調(diào)試結(jié)果 實(shí)驗(yàn)心得這個(gè)實(shí)驗(yàn)是給的固定的程序，count給定值是320,點(diǎn)陣是四個(gè)88 每個(gè)字要掃描32次,所以最多能輸入10個(gè)字,要輸入多的漢字,必須修改count的值,同時(shí)要注意在hzdot[]數(shù)組中也要對(duì)應(yīng)修改相應(yīng)的值，i字體越大顯示的越慢。通過產(chǎn)生不同頻率的波形,使發(fā)生器產(chǎn)生歌曲.一個(gè)音符對(duì)應(yīng)一個(gè)頻率，將對(duì)應(yīng)一個(gè)音符頻率的方波通到揚(yáng)聲器上，就 可以發(fā)出這個(gè)音符的聲音。將一段樂曲的音符對(duì)應(yīng)頻率的方波依次送到揚(yáng)聲 器，就可以演奏出這段樂曲。利用定時(shí)器控制單片機(jī)的 I/O 引腳輸出方波， 將相應(yīng)一種頻率的計(jì)數(shù)初值寫入計(jì)數(shù)器，就可產(chǎn)生對(duì)應(yīng)頻率的方波。 要產(chǎn)生音頻脈沖，只要計(jì)算出某一音頻的周期（1/頻率），然后將此周 期除以2，即為半周期的時(shí)間。利用定時(shí)器計(jì)時(shí)這個(gè)半周期時(shí)間。每當(dāng)計(jì)時(shí)到 后就將輸出脈沖的I/O反相，就可以在I/O腳上得到此頻率的脈沖。 音符與頻率對(duì)照關(guān)系如表所示。對(duì)于每一個(gè)音符的演奏時(shí)間，可以通過 軟件延時(shí)來處理。首先確定單位延時(shí)時(shí)間程序（根據(jù)CPU的頻率不同而有所 變化）。然后確定每個(gè)音符演奏需要幾個(gè)單位時(shí)間，就幾次調(diào)用延時(shí)子程序 即可。音符與頻率對(duì)照表（單位：Hz） 表 音符與頻率對(duì)照表（單位：Hz）頻率表是將曲譜中的音符對(duì)應(yīng)的頻率值依次記錄下來，時(shí)間表是將各個(gè)音 符發(fā)音的相對(duì)時(shí)間記錄下來（由曲譜中節(jié)拍得出）。 頻率表和時(shí)間表是一一對(duì)應(yīng)的，頻率表的最后一項(xiàng)為0，作為重復(fù)的標(biāo)志。 根據(jù)頻率表中的頻率算出對(duì)應(yīng)的計(jì)數(shù)初值，然后依次寫入T0 的計(jì)數(shù)器。將時(shí)間 表中相對(duì)時(shí)間值帶入延時(shí)程序來得到音符演奏時(shí)間。電子發(fā)聲單元原理圖 電子發(fā)聲接線圖音符與頻率對(duì)照表（單位：Hz） 軟件設(shè)計(jì) 程序代碼：include sbit POUT = P0^0。 //揚(yáng)聲器控制引腳define Clk 0x070000unsigned char data val_H。 //計(jì)數(shù)器高字節(jié)unsigned char data val_L。 //計(jì)數(shù)器低字節(jié)//頻率表unsigned int code freq_list[] = {371,495,495,495,624,556,495,556,624, 495,495,624,742,833,833,833,742,624, 624,495,556,495,556,624,495,416,416, 371,495,833,742,624,624,495,556,495, 556,833,742,624,624,742,833,990,742, 624,624,495,556,495,556,624,495,416, 416,371,495,0}。//時(shí)間表unsigned char code time_list[]= {4, 6, 2, 4, 4, 6, 2, 4, 4, 6, 2, 4, 4,12, 1, 3, 6, 2, 4, 4, 6, 2, 4, 4, 6, 2, 4, 4,12, 4, 6, 2, 4, 4, 6, 2, 4, 4, 6, 2, 4, 4,12, 4, 6, 2, 4, 4, 6, 2, 4, 4, 6, 2, 4, 4,12}。void t0_isr() interrupt 1 //定時(shí)器0中斷處理程序{ POUT = ~POUT。 //產(chǎn)生方波 TH0 = val_H。 //重新裝入計(jì)數(shù)值
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