【正文】 trend is very unpredictable. Although China Guardian 2021 Spring Auctions has achieved remarkable results, it does not mean that the market has walked out of the predicament. We still have to wait for the big economic boom to invigorate the art market.‖ Even so, the hot pursuit of some special items appeared this spring. A special session of China Guardian Spring Auctions titled ―Fine Gilt—Bronze Buddhist Images‖ achieved a great deal with total sales volume of million yuan and 92 percent sale rate. The 5th Shamar Rinpoche Statue from 1617th century of Tibet was sold for million yuan. The Beijing Chengxuan Auctions featured almost 2,800 items of coins and stamps in three sessions with good sale rate. The Huachen Auctions also set a special session of photographs under the condition of largescale decline of auction sessions. There was a palpable dull thud of disappointment that acpanied the return of the imperial entourage of Zhen Huan to her homeland. It followed a couple years of hushed excitement as Chinese fans were fed tidbits about their proud concubine who was supposed to conquer the high ground of the North American market. Zhen Huan is, of course, the title character of The Legend of Zhen Huan, a 2021 television series that swept China off its feet and later took other Asian countries by storm. Two years ago, it was reported that HBO, a premium cable service headquartered in the United States, was going to air it in North America after some modification. Now, a condensed version that provides English subtitles but no dubbing has finally been made available on Netflix for online streaming. This version, highly anticipated as a milestone in China39。 } } } 致 謝 在本設(shè)計中，遇到了不少的技術(shù)問題，憑本人現(xiàn)有的水平是無法解決的，都是通過同學(xué)和老師的精心指導(dǎo)，幫我解決了不解之惑，才使我能夠順利的完成本設(shè)計。 TH0 = 0xBE。break。i9。 } } for(i=0。 } } P0=0xFF。 P2=0xFF。 P2=0xFF。i9。i++) //向下逐次單個點(diǎn)亮 { P0=tab1[i]。i++) //向上逐次單個點(diǎn)亮 { P2=tab1[7i]。 uchar state=0。 XTAL2：來自反向振蕩器的輸出 [8]。當(dāng)振蕩器復(fù)位器件時，要保持 RST 腳兩個機(jī)器周期的高電平時間。 P1 口： P1口是一個內(nèi)部提供上拉電阻的 8位雙 向 I/O 口， P1口緩沖器能接收輸出4TTL 門電流。當(dāng)彩燈系統(tǒng)正在實(shí)現(xiàn)無論哪一種控制方式時，按下中斷開關(guān)使過程終止， 16 個 LED 發(fā)光二極管同時會處于熄滅狀態(tài)，停止當(dāng)前工作；當(dāng)再次按一下中斷開關(guān)時，彩燈系統(tǒng)會繼續(xù)進(jìn)行工作，閃光方式會與中斷之前的方式一樣。 4 設(shè)計思路 : 本方案這要是通過對基于單片機(jī)的多控制、多閃爍方式的 LED 彩燈循環(huán)系統(tǒng)的 設(shè)計，來達(dá)到本設(shè)計的要求。變換、閃爍、跳躍式的 彩燈為市場促進(jìn)了銷售，為生活營造了多姿多彩的氣氛， 因此 ， 越來越受到人們的肯定、重視、歡迎。 圖 22 按鍵控制電路圖 路 單片機(jī)的 引腳街上一個按鍵開關(guān)以實(shí)現(xiàn)對彩燈中斷的控制（如圖 23）。本系統(tǒng)中 P0 口接 LED 數(shù)碼管的段選段。 表 P3口的第二功能 口管腳 備選功能 信號名稱 RXD 串行輸入口 TXD 串行輸出口 /INT0 外部中斷 0 /INT1 外部中斷 1 T0 記時器 0外部輸入 T1 記時器 1外部輸入 /WR 外部數(shù)據(jù)存儲器寫選通 /RD 外部數(shù)據(jù)存儲器讀選通 RST：復(fù)位輸入。 XTAL1：反向振蕩放大器的輸入及內(nèi)部時鐘工作電路的輸入。 //2,4,6,8 uchar key=0。i8。i8。 for(i=0。 if(state!=3) { P0=0xFF。 if(state!=4) { P0=0xFF。 return。 return。 for(i=0。stateTemp=2。 TMOD= 0x21。 default:break。s president, who is also a renowned tenor, tells China Daily. During a tour in 1985, he went to a village and met an elderly local man, who told him a story about his friendship with a solider from Shenyang, capital of Northeast China39。 names and figuring out what to do with them for the brief time each week that I stand in front of them. I do not consider the challenges of learning to live here part of a purposeful life. I consider those issues existential in nature. One of the problems with my life in America was that I felt it had no purpose. I went to work every day and even did what I could to make my colleagues39。t just about sharing art with nomadic families but also about gaining inspiration for the music and dance. Ulan Muqir literally translates as red burgeon, and today39。break。 flagamp。 switch(key) { case 0xFE:state=1。 if(state!=4) { P0=0xFF。i++) //向下逐個點(diǎn)亮 { P0=tab2[i]。i++) //向下逐個熄滅 { P0=tab3[8i]。 for(i=0。 delay(20210)。 P2=0xFF。 P2=0xFF。 P2=0xff。 const tab2[]={0xFF,0xFE,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x00}。在訪問外部數(shù)據(jù)存儲器時，這兩次有效的 PSEN 信號將不出現(xiàn)。 10 當(dāng) P3 口寫入 “1” 后，它們被內(nèi)部上拉為高電平，并用作輸入。 P0 口： P0口為一個 8位漏級開路雙向 I/O口，每腳可吸收 8TTL 門電流。晶 振頻率選擇 12MHz，電容值取 30PF,電容的大小頻率起微調(diào)的作用。 【關(guān)鍵詞】 8051 單片機(jī)， LED 彩燈，控制系統(tǒng)，閃爍方式 3 第 1章 概述 現(xiàn)代化生活當(dāng)中彩燈控制電路的應(yīng)用越來越受到人們的喜歡，因?yàn)槠洳粌H能美化環(huán)境，渲染氣氛，還可以用于娛樂場所和電子玩具、廣告牌 當(dāng)中等，因此我們選擇了 4種不同方式控制點(diǎn)亮 16個 LED 發(fā)光二極管的彩燈控制電路設(shè)計作為畢業(yè)課題，利用本人在大學(xué)期間所學(xué)的模擬電子技術(shù)、通訊電路、語言程序設(shè)計等一些課程的知識進(jìn)行了這次畢業(yè)課題設(shè)計與制作，這次設(shè)計能在很大程度上提高了我們個人的學(xué)以致用能力和實(shí)際獨(dú)立操作能力，不論是對知識的運(yùn)用還是對論文的撰寫方面都有了很大的提高，同時也為了我們以后踏上社途工作發(fā)展打下了良好的基礎(chǔ)。 復(fù)位電路：確定單片機(jī)工作的起始狀態(tài)，完成單片機(jī)的啟動過程。由于 51 的 I/O 是弱上拉的方式，在輸出高電平時，只能輸出幾十微