Satellite-synchronous-clock-receive.rar_satellite

/*2005.03.29 CEP226卫星同步时钟B码解码程序*/ /*主机接收板 接收卫星 单片机89C2051 IC4 */ /*8.6修改，未调试*/ /*10.9 790*/ /*****************头文件*******************/ #include<AT892051.h> #include<intrins.h> #include<absacc.h> #define uchar unsigned char #define uint unsigned int /*****************接口定义*****************/ sbit PX_S=P1^0; //片选：1为选择卫星信号 sbit b_yorn=P1^1; sbit FAULT=P1^2; //故障指示 sbit SYN=P1^4; //同步指示 sbit PX_TXD=P1^5; //TXD片选：1为发送数据 sbit PX_CHU=P1^6; //TXD片选：1为初始化 sbit RESEAT=P1^7; //复位 sbit PX_B=P3^4; // 片选：1为选择B码信号 /*****************波特率*******************/ #define Baud1200 0xd0 /*d0:1200bd*/ #define Baud2400 0xe8 /*e8:2400bd*/ #define Baud4800 0xf4 /*f4:4800bd*/ #define Baud9600 0xfd /*fa:9600bd*/ /*****************日期换算*****************/ code const uchar run_lastday[13] ={0,31,29,31,30,31,30,31,31,30,31,30,31}; /*闰年*/ code const uchar nrun_lastday[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; //code const uchar chushishu[47]={0x40,0x43,0x66,0x25,0x0d,0x0a, // 0x40,0x40,0x47,0x62,0x01,0x01,0x07,0xd5, // 0x14,0x00,0x00,0x00,0x08,0x00,0xd2,0x0d,0x0a, // 0x40,0x40,0x48,0x61,0x00,0x29,0x0d,0x0a, // 0x40,0x40,0x48,0x62,0x01,0x2b,0x0d,0x0a, // 0x40,0x40,0x47,0x63,0x01,0x25,0x0d,0x0a}; code const uchar chushishu[47]={0x40,0x43,0x66,0x25,0x0d,0x0a, //@Cf%<CR><LF> 设置为出厂状态 0x40,0x40,0x47,0x62,0xff,0xff,0xff,0xff, //@@Gbmdyyhms shm C<CR><LF>时间初始化设置 shm: s：GMT符号 00=正 ff=负 0xff,0xff,0xff,0x00,0x00,0x00,0xda,0x0d,0x0a, // h：GMT 时 0至23 m：GMT 分 0至59 0x40,0x40,0x48,0x61,0x00,0x29,0x0d,0x0a, //@@Ha 0x00 0x29 位置信息 0=不输出数据,154个数（不用) 0x40,0x40,0x48,0x62,0x01,0x2b,0x0d,0x0a, //@@Hb 0x01,0x2b 短位置信息 1=每秒更新一次，54个数（用） 0x40,0x40,0x47,0x63,0x01,0x25,0x0d,0x0a}; //@@Gc 0x01,0x25 PPS控制信息 1=1PPS连续输出 bit dispsta; bit uartact; /********************************/ uchar data recxor; //校验 uchar data recwac; //校验字 uchar data recxor1; //校验 uchar data recwac1; //校验字 uchar data tranrac; // uchar idata tranbuf[11]; //串行数据 uchar data m1; //公元（年前两位） uchar data s1; //年（后两位） uchar data month; //月 uchar data ms50; //日 uchar data hour; //时 uchar data min; //分 uchar data sec; //秒 uchar data sycdata; //同步字 uchar data monbuf; //月2 uchar data daybuf; //天2 uchar data yearbuf[2]; //年2 uchar data hourbuf; //时2 uchar data minbuf; //分2 uchar data secbuf; //秒2 uchar data stabuf; //同步字2 uchar data monbuf1; //月2 uchar data daybuf1; //天2 uchar data yearbuf1[2]; //年2 uchar data hourbuf1; //时2 uchar data minbuf1; //分2 uchar data secbuf1; //秒2 uchar data stabuf1; //同步字2 uchar data b_shu; //B码个数 uchar data chushi; bit InitSign; /*******************中断子程序1**********************/ void int0_int(void)interrupt 0 using 0 //PPS码引起中断 { tranbuf[0]=0x40; tranbuf[1]=0x40; tranbuf[2]=0x48; tranbuf[3]=0x62; tranbuf[4]=monbuf; tranbuf[5]=daybuf; tranbuf[6]=yearbuf[0]; tranbuf[7]=yearbuf[1]; tranbuf[8]=hourbuf; tranbuf[9]=minbuf; tranbuf[10]=secbuf; recxor=0; tranrac=0; if(InitSign==1) { SBUF=tranbuf[tranrac]; tranrac=1; //启动串行口 } } /*****************定时器中断**********************/ void T0_int() interrupt 1 using 1 { TH0=0X4C; //50MS TL0=0X00; if(m1<4) //(10000-4C00)*12/(11.059*10^6) 12/(11.059*10^6)为一个机器周期 { if(ms50<10) { ms50++; } else { ms50=0; m1++; } } else { m1=0; s1=1; } } /*******************串行信号输出子程序*******************/ void Se_int(void) interrupt 4 using 2 { uchar i; long int x; if(InitSign==1) { PX_TXD=1; PX_CHU=0; if (TI) { TI=0; if((tranrac>=0)&&(tranrac<2)) //以下为发送数据内容 { SBUF=tranbuf[tranrac]; tranrac++; } else if((tranrac>=2)&&(tranrac<11)) { SBUF=tranbuf[tranrac]; recxor^=tranbuf[tranrac]; tranrac++; } else if((tranrac>=11)&&(tranrac<40)) { SBUF=0; tranrac++; } else if(tranrac==40) { SBUF=stabuf; recxor^=stabuf; tranrac++; } else if((tranrac>=41)&&(tranrac<51)) { SBUF=0; tranrac++; } else if(tranrac==51) { SBUF=recxor; tranrac++; } else if(tranrac==52) { SBUF=0x0d; tranrac++; } else if(tranrac==53) { SBUF=0x0a; tranrac++; } } } else { PX_TXD=0; PX_CHU=1; if(TI) { TI=0; if(chushi<47)/*47*/ { chushi++; SBUF=chushishu[chushi]; } else { InitSign=1; } } } /*********************************************************/ if (RI) { RI=0; i=SBUF; switch (recwac1) { case 0: if (i==0x40) recwac1++; //@@Hbmdyyhms（0~10）ffffaaaaoooohhhhmmmmVVvvhddn（11~39）t(卫星数)ssrrvvvvvvC<CR><LF> break; case 1: if (i==0x40) recwac1++; else recwac1=0; break; case 2: if (i==0x48) {recxor1=i;recwac1++;} else recwac1=0; break; case 3: if (i==0x62) {recxor1^=i;recwac1++;} else recwac1=0; break; case 4: monbuf1=i;recxor1^=i;recwac1++;break; case 5: daybuf1=i;recxor1^=i;recwac1++;break; case 6: yearbuf1[0]=i;recxor1^=i;recwac1++;break; case 7: yearbuf1[1]=i;recxor1^=i;recwac1++;break; case 8: hourbuf1=i;recxor1^=i;recwac1++;break; case 9: minbuf1=i;recxor1^=i;recwac1++;break; case 10: secbuf1=i;recxor1^=i;recwac1++;break; case 40: stabuf1=i;recxor1^=i;recwac1++;break; case 51: