北京大學(xué)ACM比賽題目 Write a program to read four lines of upper case (i.e., all CAPITAL LETTERS) text input (no more than 72 characters per line) from the input file and print a vertical histogram that shows how many times each letter (but not blanks, digits, or punctuation) appears in the all-upper-case input. Format your output exactly as shown.
標(biāo)簽： CAPITAL LETTERS program Write
上傳時(shí)間： 2014-01-17
上傳用戶(hù)：410805624
A design about 8051 (running at 12MHz) based system with 3 7-Seg displays and two buttons to implement the following functions. 1. When press the + button, the display C = A+B. 2. When press the button, the display C = A - B. “A” and “B” are 8-bit inputs when “C” is 9-bit output.
上傳時(shí)間： 2015-05-05
上傳用戶(hù)：guoxiy
/****************temic*********t5557***********************************/ #include <at892051.h> #include <string.h> #include <intrins.h> #include <stdio.h> #define uchar unsigned char #define uint unsigned int #define ulong unsigned long //STC12C2051AD的SFR定義 sfr WDT_CONTR = 0xe1;//stc2051的看門(mén)狗?????? /**********全局常量************/ //寫(xiě)卡的命令 #define write_command0 0//寫(xiě)密碼 #define write_command1 1//寫(xiě)配置字 #define write_command2 2//密碼寫(xiě)數(shù)據(jù) #define write_command3 3//喚醒 #define write_command4 4//停止命令 #define TRUE 1 #define FALSE 0 #define OK 0 #define ERROR 255 //讀卡的時(shí)間參數(shù)us #define ts_min 250//270*11.0592/12=249//取近似的整數(shù) #define ts_max 304//330*11.0592/12=304 #define t1_min 73//90*11.0592/12=83:-10調(diào)整 #define t1_max 156//180*11.0592/12=166 #define t2_min 184//210*11.0592/12=194 #define t2_max 267//300*11.0592/12=276 //***********不采用中斷處理:采用查詢(xún)的方法讀卡時(shí)關(guān)所有中斷****************/ sbit p_U2270B_Standby = P3^5;//p_U2270B_Standby PIN=13 sbit p_U2270B_CFE = P3^3;//p_U2270B_CFE PIN=6 sbit p_U2270B_OutPut = P3^7;//p_U2270B_OutPut PIN=2 sbit wtd_sck = P1^7;//SPI總線 sbit wtd_si = P1^3; sbit wtd_so = P1^2; sbit iic_data = P1^2;//lcd IIC sbit iic_clk = P1^7; sbit led_light = P1^6;//測(cè)試綠燈 sbit led_light1 = P1^5;//測(cè)試紅燈 sbit led_light_ok = P1^1;//讀卡成功標(biāo)志 sbit fengmingqi = P1^5; /***********全局變量************************************/ uchar data Nkey_a[4] = {0xA0, 0xA1, 0xA2, 0xA3};//初始密碼 //uchar idata card_snr[4]; //配置字 uchar data bankdata[28] = {1,2,3,4,5,6,7,1,2,3,4,5,6,7,1,2,3,4,5,6,7,1,2,3,4,5,6,7}; //存儲(chǔ)卡上用戶(hù)數(shù)據(jù)(1-7)7*4=28 uchar data cominceptbuff[6] = {1,2,3,4,5,6};//串口接收數(shù)組ram uchar command; //第一個(gè)命令 uchar command1;// //uint temp; uchar j,i; uchar myaddr = 8; //uchar ywqz_count,time_count; //ywqz jishu: uchar bdata DATA; sbit BIT0 = DATA^0; sbit BIT1 = DATA^1; sbit BIT2 = DATA^2; sbit BIT3 = DATA^3; sbit BIT4 = DATA^4; sbit BIT5 = DATA^5; sbit BIT6 = DATA^6; sbit BIT7 = DATA^7; uchar bdata DATA1; sbit BIT10 = DATA1^0; sbit BIT11 = DATA1^1; sbit BIT12 = DATA1^2; sbit BIT13 = DATA1^3; sbit BIT14 = DATA1^4; sbit BIT15 = DATA1^5; sbit BIT16 = DATA1^6; sbit BIT17 = DATA1^7; bit i_CurrentLevel;//i_CurrentLevel BIT 00H(Saves current level of OutPut pin of U2270B) bit timer1_end; bit read_ok = 0; //緩存定時(shí)值,因用同一個(gè)定時(shí)器 union HLint { uint W; struct { uchar H;uchar L; } B; };//union HLint idata a union HLint data a; //緩存定時(shí)值,因用同一個(gè)定時(shí)器 union HLint0 { uint W; struct { uchar H; uchar L; } B; };//union HLint idata a union HLint0 data b; /**********************函數(shù)原型*****************/ //讀寫(xiě)操作 void f_readcard(void);//全部讀出1~7 AOR喚醒 void f_writecard(uchar x);//根據(jù)命令寫(xiě)不同的內(nèi)容和操作 void f_clearpassword(void);//清除密碼 void f_changepassword(void);//修改密碼 //功能子函數(shù) void write_password(uchar data *data p);//寫(xiě)初始密碼或數(shù)據(jù) void write_block(uchar x,uchar data *data p);//不能用通用指針 void write_bit(bit x);//寫(xiě)位 /*子函數(shù)區(qū)*****************************************************/ void delay_2(uint x) //延時(shí),時(shí)間x*10us@12mhz,最小20us@12mhz { x--; x--; while(x) { _nop_(); _nop_(); x--; } _nop_();//WDT_CONTR=0X3C;不能頻繁的復(fù)位 _nop_(); } ///////////////////////////////////////////////////////////////////// void initial(void) { SCON = 0x50; //串口方式1,允許接收 //SCON =0x50; //01010000B:10位異步收發(fā),波特率可變,SM2=0不用接收到有效停止位才RI=1, //REN=1允許接收 TMOD = 0x21; //定時(shí)器1 定時(shí)方式2(8位),定時(shí)器0 定時(shí)方式1(16位) TCON = 0x40; //設(shè)定時(shí)器1 允許開(kāi)始計(jì)時(shí)(IT1=1) TH1 = 0xfD; //FB 18.432MHz 9600 波特率 TL1 = 0xfD; //fd 11.0592 9600 IE = 0X90; //EA=ES=1 TR1 = 1; //啟動(dòng)定時(shí)器 WDT_CONTR = 0x3c;//使能看門(mén)狗 p_U2270B_Standby = 0;//單電源 PCON = 0x00; IP = 0x10;//uart you xian XXXPS PT1 PX1 PT0 PX0 led_light1 = 1; led_light = 0; p_U2270B_OutPut = 1; } /************************************************/ void f_readcard()//讀卡 { EA = 0;//全關(guān),防止影響跳變的定時(shí)器計(jì)時(shí) WDT_CONTR = 0X3C;//喂狗 p_U2270B_CFE = 1;// delay_2(232); //>2.5ms /* // aor 用喚醒功能來(lái)防碰撞 p_U2270B_CFE = 0; delay_2(18);//start gap>150us write_bit(1);//10=操作碼讀0頁(yè) write_bit(0); write_password(&bankdata[24]);//密碼block7 p_U2270B_CFE =1 ;// delay_2(516);//編程及確認(rèn)時(shí)間5.6ms */ WDT_CONTR = 0X3C;//喂狗 led_light = 0; b.W = 0; while(!(read_ok == 1)) { //while(p_U2270B_OutPut);//等一個(gè)穩(wěn)定的低電平?超時(shí)判斷? while(!p_U2270B_OutPut);//等待上升沿的到來(lái)同步信號(hào)檢測(cè)1 TR0 = 1; //deng xia jiang while(p_U2270B_OutPut);//等待下降沿 TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1;//定時(shí)器晚啟動(dòng)10個(gè)周期 //同步頭 if((324 < a.W) && (a.W < 353)) ;//檢測(cè)同步信號(hào)1 else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } //等待上升沿 while(!p_U2270B_OutPut); TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1;//b.N1<<=8; if(a.B.L < 195);//0.5p else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } //讀0~7塊的數(shù)據(jù) for(j = 0;j < 28;j++) { //uchar i; for(i = 0;i < 16;i++)//8個(gè)位 { //等待下降沿的到來(lái) while(p_U2270B_OutPut); TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1; if(t2_max < a.W/*)&&(a.W < t2_max)*/)//1P { b.W >>= 2;//先左移再賦值 b.B.L += 0xc0; i++; } else if(t1_min < a.B.L/*)&&(a.B.L < t1_max)*/)//0.5p { b.W >>= 1; b.B.L += 0x80; } else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } i++; while(!p_U2270B_OutPut);//上升 TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1; if(t2_min < a.W/*)&&(a.W < t2_max)*/)//1P { b.W >>= 2; i++; } else if(t1_min < a.B.L/*a.W)&&(a.B.L < t1_max)*/)//0.5P //else if(!(a.W==0)) { b.W >>= 1; //temp+=0x00; //led_light1=0;led_light=1;delay_2(40000); } else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } i++; } //取出奇位 DATA = b.B.L; BIT13 = BIT7; BIT12 = BIT5; BIT11 = BIT3; BIT10 = BIT1; DATA = b.B.H; BIT17 = BIT7; BIT16 = BIT5; BIT15 = BIT3; BIT14 = BIT1; bankdata[j] = DATA1; } read_ok = 1;//讀卡完成了 read_error: _nop_(); } } /***************************************************/ void f_writecard(uchar x)//寫(xiě)卡 { p_U2270B_CFE = 1; delay_2(232); //>2.5ms //psw=0 standard write if (x == write_command0)//寫(xiě)密碼:初始化密碼 { uchar i; uchar data *data p; p = cominceptbuff; p_U2270B_CFE = 0; delay_2(31);//start gap>330us write_bit(1);//寫(xiě)操作碼1:10 write_bit(0);//寫(xiě)操作碼0 write_bit(0);//寫(xiě)鎖定位0 for(i = 0;i < 35;i++) { write_bit(1);//寫(xiě)數(shù)據(jù)位1 } p_U2270B_CFE = 1; led_light1 = 0; led_light = 1; delay_2(40000);//測(cè)試使用 //write_block(cominceptbuff[4],p); p_U2270B_CFE = 1; bankdata[20] = cominceptbuff[0];//密碼存入 bankdata[21] = cominceptbuff[1]; bankdata[22] = cominceptbuff[2]; bankdata[23] = cominceptbuff[3]; } else if (x == write_command1)//配置卡參數(shù):初始化 { uchar data *data p; p = cominceptbuff; write_bit(1);//寫(xiě)操作碼1:10 write_bit(0);//寫(xiě)操作碼0 write_bit(0);//寫(xiě)鎖定位0 write_block(cominceptbuff[4],p); p_U2270B_CFE= 1; } //psw=1 pssword mode else if(x == write_command2) //密碼寫(xiě)數(shù)據(jù) { uchar data*data p; p = &bankdata[24]; write_bit(1);//寫(xiě)操作碼1:10 write_bit(0);//寫(xiě)操作碼0 write_password(p);//發(fā)口令 write_bit(0);//寫(xiě)鎖定位0 p = cominceptbuff; write_block(cominceptbuff[4],p);//寫(xiě)數(shù)據(jù) } else if(x == write_command3)//aor //喚醒 { //cominceptbuff[1]操作碼10 X xxxxxB uchar data *data p; p = cominceptbuff; write_bit(1);//10 write_bit(0); write_password(p);//密碼 p_U2270B_CFE = 1;//此時(shí)數(shù)據(jù)不停的循環(huán)傳出 } else //停止操作碼 { write_bit(1);//11 write_bit(1); p_U2270B_CFE = 1; } p_U2270B_CFE = 1; delay_2(560);//5.6ms } /************************************/ void f_clearpassword()//清除密碼 { uchar data *data p; uchar i,x; p = &bankdata[24];//原密碼 p_U2270B_CFE = 0; delay_2(18);//start gap>150us //操作碼10:10xxxxxxB write_bit(1); write_bit(0); for(x = 0;x < 4;x++)//發(fā)原密碼 { DATA = *(p++); for(i = 0;i < 8;i++) { write_bit(BIT0); DATA >>= 1; } } write_bit(0);//鎖定位0:0 p = &cominceptbuff[0]; write_block(0x00,p);//寫(xiě)新配置參數(shù):pwd=0 //密碼無(wú)效:即清除密碼 DATA = 0x00;//停止操作碼00000000B for(i = 0;i < 2;i++) { write_bit(BIT7); DATA <<= 1; } p_U2270B_CFE = 1; delay_2(560);//5.6ms } /*********************************/ void f_changepassword()//修改密碼 { uchar data *data p; uchar i,x,addr; addr = 0x07;//block7 p = &Nkey_a[0];//原密碼 DATA = 0x80;//操作碼10:10xxxxxxB for(i = 0;i < 2;i++) { write_bit(BIT7); DATA <<= 1; } for(x = 0;x < 4;x++)//發(fā)原密碼 { DATA = *(p++); for(i = 0;i < 8;i++) { write_bit(BIT7); DATA >>= 1; } } write_bit(0);//鎖定位0:0 p = &cominceptbuff[0]; write_block(0x07,p);//寫(xiě)新密碼 p_U2270B_CFE = 1; bankdata[24] = cominceptbuff[0];//密碼存入 bankdata[25] = cominceptbuff[1]; bankdata[26] = cominceptbuff[2]; bankdata[27] = cominceptbuff[3]; DATA = 0x00;//停止操作碼00000000B for(i = 0;i < 2;i++) { write_bit(BIT7); DATA <<= 1; } p_U2270B_CFE = 1; delay_2(560);//5.6ms } /***************************子函數(shù)***********************************/ void write_bit(bit x)//寫(xiě)一位 { if(x) { p_U2270B_CFE = 1; delay_2(32);//448*11.0592/120=42延時(shí)448us p_U2270B_CFE = 0; delay_2(28);//280*11.0592/120=26寫(xiě)1 } else { p_U2270B_CFE = 1; delay_2(92);//192*11.0592/120=18 p_U2270B_CFE = 0; delay_2(28);//280*11.0592/120=26寫(xiě)0 } } /*******************寫(xiě)一個(gè)block*******************/ void write_block(uchar addr,uchar data *data p) { uchar i,j; for(i = 0;i < 4;i++)//block0數(shù)據(jù) { DATA = *(p++); for(j = 0;j < 8;j++) { write_bit(BIT0); DATA >>= 1; } } DATA = addr <<= 5;//0地址 for(i = 0;i < 3;i++) { write_bit(BIT7); DATA <<= 1; } } /*************************************************/ void write_password(uchar data *data p) { uchar i,j; for(i = 0;i < 4;i++)// { DATA = *(p++); for(j = 0;j < 8;j++) { write_bit(BIT0); DATA >>= 1; } } } /*************************************************/ void main() { initial(); TI = RI = 0; ES = 1; EA = 1; delay_2(28); //f_readcard(); while(1) { f_readcard(); //讀卡 f_writecard(command1); //寫(xiě)卡 f_clearpassword(); //清除密碼 f_changepassword(); //修改密碼 } }
標(biāo)簽： 12345
上傳時(shí)間： 2017-10-20
上傳用戶(hù)：my_lcs
#include<stdio.h> #include<windows.h> int xuanxiang; int studentcount; int banjihao[100]; int xueqihao[100][10]; char xm[100][100]; int xuehao[100][10]; int score[100][3]; int yuwen; int shuxue[000]; int yingyu[100]; int c[100]; int p; char x[1000][100]="",y[100][100]="";/*x學(xué)院 y專(zhuān)業(yè) z班級(jí)*/ int z[100]; main() { void input(); void inputsc(); void alter(); void scbybannji(); printf("--------學(xué)生成績(jī)管理-----\n"); printf("請(qǐng)按相應(yīng)數(shù)字鍵來(lái)實(shí)現(xiàn)相應(yīng)功能\n"); printf("1.錄入學(xué)生信息 2.錄入學(xué)生成績(jī) 3.修改學(xué)生成績(jī)\n"); printf("4.查詢(xún)學(xué)生成績(jī) 5.不及格科目及名單 6.按班級(jí)輸出學(xué)生成績(jī)單\n"); printf("請(qǐng)輸入你要實(shí)現(xiàn)的功能所對(duì)應(yīng)的數(shù)字:"); scanf("%d",&xuanxiang); system("cls"); getchar(); switch (xuanxiang) { case 1:input(); case 2:inputsc(); case 3:alter(); /*case 4:select score(); case 5:bujigekemujimingdan();*/ case 6:scbybanji; } } void input() { int i; printf("請(qǐng)輸入你的學(xué)院名稱(chēng):"); gets(x); printf("請(qǐng)輸入你的專(zhuān)業(yè)名稱(chēng):"); gets(y); printf("請(qǐng)輸入你的班級(jí)號(hào):"); scanf("%d",&z); printf("請(qǐng)輸入你們一個(gè)班有幾個(gè)人:"); scanf("%d",&p); system("cls"); for(i=0;i<p;i++) { printf("請(qǐng)輸入第%d個(gè)學(xué)生的學(xué)號(hào):",i+1); scanf("%d",xuehao[i]); getchar(); printf("請(qǐng)輸入第%d個(gè)學(xué)生的姓名:",i+1); gets(xm[i]); system("cls"); } printf("您已經(jīng)錄入完畢您的班級(jí)所有學(xué)生的信息!\n"); printf("您的班級(jí)為%s%s%s\n",x,y,z); /*alter(p);*/ } void inputsc() { int i; for(i=0;i<p;i++) { printf("\n"); printf("--------------------------------------------------------------------------------\n\n"); printf("\t\t\t\t錄入學(xué)生的成績(jī)\n\n\n"); printf("--------------------------------------------------------------------------------\n\n"); printf("\t\t\t\t%s\n",xm[i]); printf("\n"); printf("\t\t\t\t數(shù)學(xué):"); scanf("%d",&shuxue[i]); printf("\n"); getchar(); printf("\t\t\t\t英語(yǔ):"); scanf("%d",&yingyu[i]); printf("\n"); getchar(); printf("\t\t\t\tc語(yǔ)言:"); scanf("%d",&c[i]); system("cls"); } } void alter() { int i;/*循環(huán)變量*/ int m[10000];/*要查詢(xún)的學(xué)號(hào)*/ int b;/*修改后的成績(jī)*/ char kemu[20]=""; printf("請(qǐng)輸入你要修改的學(xué)生的學(xué)號(hào)"); scanf("%d",&m); for (i=0;i<p;i++) { if (m==xuehao[i]) { printf("%s的數(shù)學(xué)成績(jī)?yōu)?d,英語(yǔ)成績(jī)?yōu)?d,c語(yǔ)言成績(jī)?yōu)?d,xm[i],shuxue[i],yingyu[i],c[i]"); printf("請(qǐng)輸入你想修改的科目");} } gets(kemu); getchar(); if (kemu=="數(shù)學(xué)"); { scanf("%d",&b); shuxue[i]=b;} if (kemu=="英語(yǔ)"); { scanf("%d",&b); yingyu[i]=b;} if (kemu=="c語(yǔ)言"); { scanf("%d",&b); c[i]=b; } printf("%s的數(shù)學(xué)成績(jī)?yōu)?d,英語(yǔ)成績(jī)?yōu)?d,c語(yǔ)言成績(jī)?yōu)?d,xm[i],shuxue[i],yingyu[i],c[i]"); } void scbybannji() { int i; char zyname[20]; int bjnumber; printf("請(qǐng)輸入你的專(zhuān)業(yè)名稱(chēng)"); scanf("%s",&zyname); printf("請(qǐng)輸入你的班級(jí)號(hào)"); scanf("%d",&bjnumber); for (i=0;i<p;i++) { if (zyname==y[i]); if (bjnumber==z[i]); printf("專(zhuān)業(yè)名稱(chēng)%s班級(jí)號(hào)%d數(shù)學(xué)成績(jī)%d英語(yǔ)成績(jī)%dc語(yǔ)言成績(jī)%d，y[i],z[i],shuxue[i],yingyu[i],c[i]"); } }
標(biāo)簽： c語(yǔ)言
上傳時(shí)間： 2018-06-08
上傳用戶(hù)：2369043090
This book is about multipoint cooperative communication, a key technology to overcome the long-standing problem of limited transmission rate caused by inter- point interference. However, the multipoint cooperative communication is not an isolated technology. Instead, it covers a vast range of research areas such as the multiple-input multiple-outputsystem, the relay network, channel state information issues, inter-point radio resource management operations, coordinated or joint transmissions, etc. We suppose that any attempt trying to thoroughly analyze the multipoint cooperative communication technology might end up working on a cyclopedia for modern communication systems and easily get lost in discussing all kinds of cooperative communication schemes as well as the associated models and their variations.
標(biāo)簽： Communication Multi-point Cooperative Systems
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
近些年來(lái)，隨著電力電子技術(shù)的發(fā)展，電力電子系統(tǒng)集成受到越來(lái)越多的關(guān)注，其中標(biāo)準(zhǔn)化模塊的串并聯(lián)技術(shù)成為研究熱點(diǎn)之一。輸入并聯(lián)輸出串聯(lián)型(Input-Parallel and Output-Series，IPOS)組合變換器適用于大功率高輸出電壓的場(chǎng)合。 要保證IPOS組合變換器正常工作，必須保證其各模塊的輸出電壓均衡。本文首先揭示了IPOS組合變換器中每個(gè)模塊輸入電流均分和輸出電壓均分之間的關(guān)系，在此基礎(chǔ)上提出一種輸出均壓控制方案，該方案對(duì)系統(tǒng)輸出電壓調(diào)節(jié)沒(méi)有影響。選擇移相控制全橋(Full-Bridge，F(xiàn)B)變換器作為基本模塊，對(duì)n個(gè)全橋模塊組成的IPOS組合變換器建立小信號(hào)數(shù)學(xué)模型，推導(dǎo)出采用輸出均壓控制方案的IPOS-FB系統(tǒng)的數(shù)學(xué)模型，該模型證明各模塊輸出均壓閉環(huán)不影響系統(tǒng)輸出電壓閉環(huán)的調(diào)節(jié)，給出了模塊輸出均壓閉環(huán)和系統(tǒng)輸出電壓閉環(huán)的補(bǔ)償網(wǎng)絡(luò)參數(shù)設(shè)計(jì)。對(duì)于IPOS組合變換器，采用交錯(cuò)控制，由于電流紋波抵消效應(yīng)，輸入濾波電容容量可大大減小；由于電壓紋波抵消作用，在相同的系統(tǒng)輸出電壓紋波下，各模塊的輸出濾波電容可大大減小，由此可以提高變換器的功率密度。 根據(jù)所提出的輸出均壓控制策略，在實(shí)驗(yàn)室研制了一臺(tái)由兩個(gè)1kW全橋模塊組成的IPOS-FB原理樣機(jī)，每個(gè)模塊輸入電壓為270V，輸出電壓為180V。并進(jìn)行了仿真和實(shí)驗(yàn)驗(yàn)證，結(jié)果均表明本控制方案是正確有效的。
標(biāo)簽： 輸入 并聯(lián) 串聯(lián)
上傳時(shí)間： 2013-06-17
上傳用戶(hù)：cwyd0822
ASIC對(duì)產(chǎn)品成本和靈活性有一定的要求.基于MCU方式的ASIC具有較高的靈活性和較低的成本,然而抗干擾性和可靠性相對(duì)較低,運(yùn)算速度也受到限制.常規(guī)ASIC的硬件具有速度優(yōu)勢(shì)和較高的可靠性及抗干擾能力,然而不是靈活性較差,就是成本較高.與傳統(tǒng)硬件(CHW)相比,具有一定可配置特性的場(chǎng)可編程門(mén)陣列(FPGA)的出現(xiàn),使建立在可再配置硬件基礎(chǔ)上的進(jìn)化硬件(EHW)成為智能硬件電路設(shè)計(jì)的一種新方法.作為進(jìn)化算法和可編程器件技術(shù)相結(jié)合的產(chǎn)物,可重構(gòu)FPGA的研究屬于EHW的研究范疇,是研究EHW的一種具體的實(shí)現(xiàn)方法.論文認(rèn)為面向分類(lèi)的專(zhuān)用類(lèi)可重構(gòu)FPGA(ASR-FPGA)的研究,可使可重構(gòu)電路粒度劃分的針對(duì)性更強(qiáng)、設(shè)計(jì)更易實(shí)現(xiàn).論文研究的可重構(gòu)FPGA的BCH通訊糾錯(cuò)碼進(jìn)化電路是一類(lèi)ASR-FPGA電路的具體方法,具有一定的實(shí)用價(jià)值.論文所做的工作主要包括:(1)BCH編譯碼電路的設(shè)計(jì)——求取實(shí)驗(yàn)用BCH碼的生成多項(xiàng)式和校驗(yàn)多項(xiàng)式及其相應(yīng)的矩陣并構(gòu)造實(shí)驗(yàn)用BCH碼;(2)建立基于可重構(gòu)FPGA的基核——構(gòu)造具有可重構(gòu)特性的硬件功能單元,以此作為可重構(gòu)BCH碼電路的設(shè)計(jì)基礎(chǔ);(3)構(gòu)造實(shí)現(xiàn)可重構(gòu)BCH糾錯(cuò)碼電路的方法——建立可重構(gòu)糾錯(cuò)碼硬件電路算法并進(jìn)行實(shí)驗(yàn)驗(yàn)證;(4)在可重構(gòu)糾錯(cuò)碼電路基礎(chǔ)上,構(gòu)造進(jìn)化硬件控制功能塊的結(jié)構(gòu),完成各進(jìn)化RLA控制模塊的驗(yàn)證和實(shí)現(xiàn).課題是將可重構(gòu)BCH碼的編譯碼電路的實(shí)現(xiàn)作為一類(lèi)ASR-FPGA的研究目標(biāo),主要成果是根據(jù)可編程邏輯電路的特點(diǎn),選擇一種可編程樹(shù)的電路模型,并將它作為可重構(gòu)FPGA電路的基核T;通過(guò)對(duì)循環(huán)BCH糾錯(cuò)碼的構(gòu)造原理和電路結(jié)構(gòu)的研究,將基核模型擴(kuò)展為能滿足糾錯(cuò)碼電路需要的糾錯(cuò)碼基本功能單元T;以T作為再劃分的基本單元,對(duì)FPGA進(jìn)行"格式化",使T規(guī)則排列在FPGA上,通過(guò)對(duì)T的控制端的不同配置來(lái)實(shí)現(xiàn)糾錯(cuò)碼的各個(gè)功能單元;在可重構(gòu)基核的基礎(chǔ)上提出了糾錯(cuò)碼重構(gòu)電路的嵌套式GA理論模型,將嵌套式GA的染色體串作為進(jìn)化硬件描述語(yǔ)言,通過(guò)轉(zhuǎn)換為相應(yīng)的VHDL語(yǔ)言描述以實(shí)現(xiàn)硬件電路;采用RLA模型的有限狀態(tài)機(jī)FSM方式實(shí)現(xiàn)了可重構(gòu)糾錯(cuò)碼電路的EHW的各個(gè)控制功能塊.在實(shí)驗(yàn)方面,利用Xilinx FPGA開(kāi)發(fā)系統(tǒng)中的VHDL語(yǔ)言和電路圖相結(jié)合的設(shè)計(jì)方法建立了循環(huán)糾錯(cuò)碼基核單元的可重構(gòu)模型,進(jìn)行循環(huán)糾錯(cuò)BCH碼的電路和功能仿真,在Xilinx公司的Virtex600E芯片進(jìn)行了FPGA實(shí)現(xiàn).課題在研究模型上選取的是比較基本的BCH糾錯(cuò)碼電路,立足于解決基于可重構(gòu)FPGA核的設(shè)計(jì)的基本問(wèn)題.課題的研究成果及其總結(jié)的一套ASR-FPGA進(jìn)化硬件電路的設(shè)計(jì)方法對(duì)實(shí)際的進(jìn)化硬件設(shè)計(jì)具有一定的實(shí)際指導(dǎo)意義,提出的基于專(zhuān)用類(lèi)基核FPGA電路結(jié)構(gòu)的研究方法為新型進(jìn)化硬件的器件結(jié)構(gòu)的設(shè)計(jì)也可提供一種借鑒.
標(biāo)簽： FPGA 可重構(gòu) 通訊 糾錯(cuò)
上傳時(shí)間： 2013-07-01
上傳用戶(hù)：myworkpost
Abstract: This document details the Oceanside (MAXREFDES9#) subsystem reference design, a 3.3V to 15V input,±15V (±12V) output, isolated power supply. The Oceanside design includes a high-efficiency step-up controller, a36V H-bridge transformer driver for isolated supplies, a wide input range, and adjustable output low-dropout linearregulator (LDO). Test results and hardware files are included.
標(biāo)簽： 隔離電源 設(shè)計(jì)手冊(cè)
上傳時(shí)間： 2013-10-12
上傳用戶(hù)：jinyao
Industrial remote monitoring systems and keep-alivecircuits spend most of their time in standby mode. Manyof these systems also depend on battery power, so powersupply effi ciency in standby state is very important tomaximize battery life. The LT®8410/-1 high effi ciencyboost converter is ideal for these systems, requiringonly 8.5μA of quiescent current in standby mode. Thedevice integrates high value (12.4M/0.4M) output feedbackresistors, signifi cantly reducing input current whenthe output is in regulation with no load. Other featuresinclude an integrated 40V switch and Schottky diode,output disconnect with current limit, built in soft-start,overvoltage protection and a wide input range, all in atiny 8-pin 2mm × 2mm DFN package.
標(biāo)簽： 465 DN 超低功耗 升壓轉(zhuǎn)換器
上傳時(shí)間： 2013-11-23
上傳用戶(hù)：新手無(wú)憂
a_bit equ 20h ;個(gè)位數(shù)存放處 b_bit equ 21h ;十位數(shù)存放處 temp equ 22h ;計(jì)數(shù)器寄存器 star: mov temp,#0 ;初始化計(jì)數(shù)器 stlop: acall display inc temp mov a,temp cjne a,#100,next ;=100重來(lái) mov temp,#0 next: ljmp stlop ;顯示子程序 display: mov a,temp ;將temp中的十六進(jìn)制數(shù)轉(zhuǎn)換成10進(jìn)制 mov b,#10 ;10進(jìn)制/10=10進(jìn)制 div ab mov b_bit,a ;十位在a mov a_bit,b ;個(gè)位在b mov dptr,#numtab ;指定查表啟始地址 mov r0,#4 dpl1: mov r1,#250 ;顯示1000次 dplop: mov a,a_bit ;取個(gè)位數(shù) MOVC A,@A+DPTR ;查個(gè)位數(shù)的7段代碼 mov p0,a ;送出個(gè)位的7段代碼
標(biāo)簽： 直接驅(qū)動(dòng) 數(shù)碼管 計(jì)數(shù)器 程序
上傳時(shí)間： 2013-11-06
上傳用戶(hù)：lx9076
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