12c887.lst

利用热释红外传感器、12C887和PIC单片机制作的智能电子时钟

     1: #include <pic.h>
     2: #include "12c887.h";
     3: 
     4: /////////////   SUNROUTINE DECLARE   /////////////
     5: void _12cc877_init(void);                                   // initialize RTC 12C887
     6: extern _12c887_read(unsigned char ADDRESS);                            // 12C887 data read routine
     7: extern _12c887_write(unsigned char ADDRESS,unsigned char DATA);        // 12C887 data write routine
     8: 
     9: /////////////////// SUBROUTINE ///////////////////
    10: _12c887_init()              // initialize RTC 12c887
    11: {
    12:     _12c887_write(SECOND,0x00);     // write current time
    13:     _12c887_write(MINUTE,0x54);
    14:     _12c887_write(HOUR,0x15);
    15:     _12c887_write(DayOfWeek,0x01);
    16:     _12c887_write(DayOfMonth,0x24);
    17:     _12c887_write(MONTH,0x09);
    18:     _12c887_write(YEAR,0x07);
    19:     _12c887_write(CENTURY,0x20);
    20:     _12c887_write(REGA,0b10101111); // configure the control register
    21:     _12c887_write(REGB,0b01111010);
    22:     _12c887_write(REGC,0b00000000);
    23: }
    24: 
    25: _12c887_read(unsigned char ADDRESS) // read 12c887 data
    26: {
    27:     unsigned char temp;
    28:     TRISD=0x00;
    29:     WR=1;
    30:     RD=1;
    31:     ALE=1;
    32:     CS=0;
    33:     PORTD=ADDRESS;
    34:     ALE=0;
    35:     TRISD=0xff;
    36:     RD=0;
    37:     temp=PORTD;
    38:     RD=1;
    39:     CS=1;
    40:     ALE=1;
    41:     return(temp);
    42: }
    43: 
    44: _12c887_write(unsigned char ADDRESS,unsigned char DATA) // write 12c887 data
    45: {
    46:     TRISD=0x00;
    47:     WR=1;
    48:     RD=1;
    49:     ALE=1;
    50:     CS=0;
    51:     PORTD=ADDRESS;
    52:     ALE=0;
    53:     PORTD=DATA;
    54:     WR=0;
    55:     WR=1;
    56:     ALE=1;
    57:     CS=1;
    58: }