【正文】 子程序的首址一般都給有標(biāo)號(hào)，末尾則有 返主指令。 H 型雙極可逆 PWM 驅(qū)動(dòng)系統(tǒng)。 程序中有關(guān)定時(shí)器 /計(jì)數(shù)器 1和 1置數(shù)的計(jì)算如下： 定時(shí)器 /計(jì)數(shù)器哦按 ms定時(shí)，當(dāng)采用 12MHz晶振時(shí)，內(nèi)部時(shí)鐘脈沖的頻率為 1MHz，每 1us 計(jì) 1個(gè)脈沖， 1ms 需 1000 個(gè)脈沖。監(jiān)控程序不斷循環(huán)，直到有停車(chē)語(yǔ)音接收到。 MAC8875 在輸出端只需一個(gè) 1uF 陶瓷電容，就能確保負(fù)載最高為 150mA時(shí)的穩(wěn)定性。 鍵盤(pán)電路 鍵盤(pán)工作原理 可采用“掃描”的方法查看鍵盤(pán)中有無(wú)按鍵按下以及所按的是哪有個(gè)鍵，其原理如圖所示。但在工作的過(guò)程中，由于 4個(gè)開(kāi)關(guān)管都出在開(kāi)關(guān)狀態(tài)，功率損耗大，因此雙極性驅(qū)動(dòng)只用語(yǔ)小功率直流電動(dòng)機(jī)上。它除了具有內(nèi)置音頻信號(hào)方法器、接口電路、聲音壓縮、分析、識(shí)別處理系統(tǒng)外，還自帶 64kB 的 SRAM 和 ROM 電路，具有性能可靠、功能完整和外接元器件少等特點(diǎn)。s order, the entertainment and interactive is stronger. This car various part uses the modular design, between each module control section uses programmable micro processing to cry, may in not increase the system hardware in the situation conveniently to carry on the redevelopment to the article carried on the experiment to a car, the experimental result had indicated that, the speech recognition system distinguished in the low noise environment rate is very high, in the noise level high situation, the recognition rate had the car response is keen. Key word: Speech recognition monolithic integrated circuit intelligence car motordriven 目 錄 緒 論 ........................................................................................................................... 4 1 總體方案 ..................................................................................................................... 5 方案論證 ........................................................................................................... 5 總體方案圖 ....................................................................................................... 5 系統(tǒng)工作原理 ................................................................................................... 5 2 硬件設(shè)計(jì) ..................................................................................................................... 6 語(yǔ)音識(shí)別模塊 .................................................................................................. 6 電機(jī)驅(qū)動(dòng)模塊 ................................................................................................ 10 紅外檢測(cè)模塊 ................................................................................................ 11 鍵盤(pán)電路 ........................................................................................................ 11 主控芯片 8051 模塊 ...................................................................................... 12 單片機(jī) 的電源設(shè)計(jì) ............................................................................... 12 單片機(jī)復(fù)位電路 ................................................................................... 15 3．軟件設(shè)計(jì) ................................................................................................................ 16 主程序 ............................................................................................................. 16 監(jiān)控程序 ......................................................................................................... 17 語(yǔ)音訓(xùn)練程序 ................................................................................................. 20 鍵盤(pán)掃描程序 ................................................................................................ 21 電機(jī)驅(qū)動(dòng)程序 ................................................................................................. 22 延時(shí)程序 ........................................................................................................ 24 程序清單： ...................................................................................................... 24 主程序清單 ........................................................................................... 24 語(yǔ)音訓(xùn)練程序清單 .............................................................................. 29 結(jié) 論 ............................................................................................................................ 32 致 謝 ................