Sha256 Algorithm. The SHA hash functions are a set of cryptographic hash functions designed by the National Security Agency (NSA) and published by the NIST as a U.S. Federal Information Processing standard. SHA stands for Secure Hash Algorithm
標(biāo)簽： functions hash cryptographic Algorithm
上傳時(shí)間： 2014-11-09
上傳用戶：1109003457
This definitive volume contains all the information you need to understand and use SQL and its implementations in accordance with the established SQL99 standard
標(biāo)簽： information definitive understand and
上傳時(shí)間： 2017-09-20
上傳用戶：tonyshao
The TJA1040 is an advanced high speed CAN transceiver for use in automotive and general industrial applications. It supports the differential bus signal representation described in the international standard for in-vehicle high speed CAN applications (ISO11898). CAN (Controller Area Network) is the standard protocol for serial in-vehicle bus communication, particularly for Engine Management and Body Multiplexing. The TJA1040 provides a Standby mode, as known from its functional predecessors PCA82C250 and PCA82C251, but with significantly reduced power consumption. Besides the excellent low-power behavior the TJA1040 offers several valuable system improvements. Highlights are the absolute passive bus behavior if the device is unpowered as well as the excellent EMC performance.
標(biāo)簽： CAN
上傳時(shí)間： 2015-03-23
上傳用戶：Yuan Lo
此為JavaAPI中文手冊，JavaTM 2 Platform standard Edition 5.0 API 規(guī)范
標(biāo)簽： java
上傳時(shí)間： 2015-04-28
上傳用戶：Tinylin
Writing essays and dissertations can be a major concern for overseas students studying at English-medium colleges and universities. Virtually all courses contain a large degree of written assessment and it is essential to ensure that your writing skills meet the necessary standard. Academic Writing is a new kind of writing course for all international students who have to write exams or coursework in English. This practical book thoroughly explains the writing process and covers all the key writing skills.
標(biāo)簽： Academic writing
上傳時(shí)間： 2015-11-13
上傳用戶：blackbat
IEEE standard Verilog? Hardware Description Language
標(biāo)簽： verilog-ieee
上傳時(shí)間： 2016-05-19
上傳用戶：assman
MDK-ARM軟件為基于Cortex-M、Cortex-R4、ARM7、ARM9處理器設(shè)備提供了一個完整的開發(fā)環(huán)境。 MDK-ARM專為微控制器應(yīng)用而設(shè)計(jì)，不僅易學(xué)易用，而且功能強(qiáng)大，能夠滿足大多數(shù)苛刻的嵌入式應(yīng)用。MDK-ARM有四個可用版本，分別是MDK-Lite、MDK-Basic、MDK-standard、MDK-Professional。所有版本均提供一個完善的C / C++開發(fā)環(huán)境，其中MDK-Professional還包含大量的中間庫。
標(biāo)簽： Keil MDK4 23 破解 注冊機(jī)
上傳時(shí)間： 2016-07-20
上傳用戶：lizhenyu4545
standard transfer specification (STS) –Physical layer protocol for one-way numeric and magnetic card token carriers .
上傳時(shí)間： 2017-02-04
上傳用戶：aarons大叔
The FlexiForce A301 is our smallest standard piezoresistive force sensor.
上傳時(shí)間： 2017-04-13
上傳用戶：guoggn
/****************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的看門狗?????? /**********全局常量************/ //寫卡的命令 #define write_command0 0//寫密碼 #define write_command1 1//寫配置字 #define write_command2 2//密碼寫數(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;//測試綠燈 sbit led_light1 = P1^5;//測試紅燈 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}; //存儲卡上用戶數(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; //啟動定時(shí)器 WDT_CONTR = 0x3c;//使能看門狗 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 用喚醒功能來防碰撞 p_U2270B_CFE = 0; delay_2(18);//start gap>150us write_bit(1);//10=操作碼讀0頁 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);//等一個穩(wěn)定的低電平?超時(shí)判斷? while(!p_U2270B_OutPut);//等待上升沿的到來同步信號檢測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10個周期 //同步頭 if((324 < a.W) && (a.W < 353)) ;//檢測同步信號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個位 { //等待下降沿的到來 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)//寫卡 { p_U2270B_CFE = 1; delay_2(232); //>2.5ms //psw=0 standard write if (x == write_command0)//寫密碼: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);//寫操作碼1:10 write_bit(0);//寫操作碼0 write_bit(0);//寫鎖定位0 for(i = 0;i < 35;i++) { write_bit(1);//寫數(shù)據(jù)位1 } p_U2270B_CFE = 1; led_light1 = 0; led_light = 1; delay_2(40000);//測試使用 //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);//寫操作碼1:10 write_bit(0);//寫操作碼0 write_bit(0);//寫鎖定位0 write_block(cominceptbuff[4],p); p_U2270B_CFE= 1; } //psw=1 pssword mode else if(x == write_command2) //密碼寫數(shù)據(jù) { uchar data*data p; p = &bankdata[24]; write_bit(1);//寫操作碼1:10 write_bit(0);//寫操作碼0 write_password(p);//發(fā)口令 write_bit(0);//寫鎖定位0 p = cominceptbuff; write_block(cominceptbuff[4],p);//寫數(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);//寫新配置參數(shù):pwd=0 //密碼無效: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0 } } /*******************寫一個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：my_lcs
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