sfr P3 = 0xB0; sfr PSW = 0xD0; sfr ACC = 0xE0; sfr B = 0xF0; sfr SP = 0x81; sfr DPL = 0x82; sfr DPH = 0x83; sfr PCON = 0x87; sfr TCON = 0x88; sfr TMOD = 0x89; sfr TL0 = 0x8A; sfr TL1 = 0x8B; sfr TH0 = 0x8C; sfr TH1 = 0x8D; sfr IE = 0xA8; sfr...
sfr P3 = 0xB0; sfr PSW = 0xD0; sfrACC = 0xE0; sfr B = 0xF0; sfr SP = 0x81; sfr DPL = 0x82; sfr DPH = 0x83; sfr PCON = 0x87; sfr TCON = 0x88; sfr TMOD = 0x89; sfr TL0 = 0x8A; sfr TL1 = 0x8B; sfr TH0 = 0x8C; sfr TH1 = 0x8D; sfr IE = 0xA8; sfr ...
sfr P2 = 0xA0; sfr P3 = 0xB0; sfr PSW = 0xD0; sfr ACC = 0xE0; sfr B = 0xF0; sfr SP = 0x81; sfr DPL = 0x82; sfr DPH = 0x83; sfr PCON = 0x87; sfr TCON = 0x88; sfr TMOD = 0x89; sfr TL0 = 0x8A; sfr TL1 = 0x8B; sfr TH0 = 0x8C; sfr TH1 = 0x8D; sfr...
sfr P3 = 0xB0; sfr PSW = 0xD0; sfr ACC = 0xE0; sfr B = 0xF0; sfr SP = 0x81; sfr DPL = 0x82; sfr DPH = 0x83; sfr PCON = 0x87; sfr TCON = 0x88; sfr TMOD = 0x89; sfr TL0 = 0x8A; sfr TL1 = 0x8B; sfr TH0 = 0x8C; sfr TH1 = 0x8D; sfr IE = 0xA8; sfr...
sfr P3 = 0xB0; /* Port-3, address 0B0h */ P0, P1, P2, and P3 are the SFRNAMEdeclarations. Names for sfr variables are defined just like other C variable declarations. Any symbolicNAMEmay be used in an sfr declaration. The address specification after the equal sign ('=') must be ...
上面的程序在编译时.编译器说:warning c206:'diplay':missing function-prototype erorr c231:'display#includesbit k0=P1^0;sbit k1=P1^1;sbit k2=P1^2;sbit k3=P1^3;sbit d0=P1^4;sbit d1=P1^5;sbit d2=P1^6;sbit d3=P1^7;sbit B0=P3^7;sbit I0=P2^0;s
P3端口接4*4矩阵按键,语句 P3=0x0f;temp=P3;若temp为0x7f,说明 第一空: P3.7的连接线上有键按下 第二空: P3.6的连接线上有键按下 第三空: P3.5的连接线上有键按下 第四空: P3.4的连接线上有键按下 查看统计详情 11 第一空: A 查看统计详情 12 为保证P0口正常工作,焊接中P0口要外接( )...
sfr P3 = 0xB0;sfr PSW = 0xD0;sfr ACC = 0xE0;简单来了就是为RAM里面的地址改名字方便我们用，非常简单。.其实这些东西你不用过于研究的，你了解一下就可以，因为我们在写程序中肯定有一个reg52.h的头文件，因为定义名字这个事情就在这个头文件里面了，你会调用就行，不用过于研究。..如果你...
sbit B0=P3^7;sbit I0=P2^0;sbit I1=P2^2;sbit I2=P2^3;sbit I3=P2^4;sbit kz=P3^0;unsigned char qiangdanum=0x3f;unsigned char code table[]={0x3f,0x06,0x5d,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};unsigned char ge=0,shi=0;unsigned int num=0,time=0;void dispiay();void ...
sbitP3_7=P3^7; unsignedcharcode p[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x3f,0xc6}; unsignedlongtimer=0,distan=0; unsignedchari=0,dis_mode=0; voiddelay(unsignedintt)//决扮痕方 { while(--t); } voiddisplay(unsignedlongdistan)//�幣痕方 ...