giup em nhe

[giangk9a]

/////////////////////////////////////////////////////////////////////////
//// EX_RTCLK.C ////
//// ////
//// This program reads and writes to an external Real Time Clock. ////
//// It communicates to the user using the LCD and keypad. ////
//// ////
//// Configure the CCS prototype card as follows: ////
//// Install the LCD and keypad. ////
//// ////
//// Jumpers: ////
//// PCB pin A2 to RS232 RX, pin A3 to RS232 TX ////
//// PCM,PCH pin C7 to RS232 RX, pin C6 to RS232 TX ////
//// ////
//// This example will work with the PCB, PCM and PCH compilers. ////
//// The following conditional compilation lines are used to ////
//// include a valid device for each compiler. Change the device, ////
//// clock and RS232 pins for your hardware if needed. ////
/////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS ////
//// C compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, ////
//// reproduction or distribution is permitted without written ////
//// permission. Derivative programs created using this software ////
//// in object code form are not restricted in any way. ////
/////////////////////////////////////////////////////////////////////////



//#elif defined(__PCM__)
#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232 (baud=9600, xmit=PIN_C6, rcv=PIN_C7)



#include <ds1302.c>
#include <lcd.c>
#include <kbd.c>

byte get_number() {
char first,second;

do {
first=kbd_getc();
} while ((first<'0') || (first>'9'));
lcd_putc(first);
first-='0';

do {
second=kbd_getc();
} while ((second<'0') || (second>'9'));
lcd_putc(second);
second-='0';

return((first*10)+second);
}

void set_clock(){
byte day,mth,year,dow,hour,min;

lcd_putc("\fYear 20: ");
year=get_number();
lcd_putc("\fMonth: ");
mth=get_number();
lcd_putc("\fDay: ");
day=get_number();
lcd_putc("\fWeekday 1-7: ");
dow=get_number();
lcd_putc("\fHour: ");
hour=get_number();
lcd_putc("\fMin: ");
min=get_number();

rtc_set_datetime(day,mth,year,dow,hour,min);
}

void main() {
char cmd;
byte day,mth,year,dow,hour,min,sec;

rtc_init();
lcd_init();
kbd_init();

lcd_putc("\f1: Change, 2: Display");

do {
cmd=kbd_getc();
} while ((cmd!='1')&&(cmd!='2'));

if(cmd=='1')
set_clock();

while (1) {
lcd_putc('\f');
rtc_get_date( day, mth, year, dow);
rtc_get_time( hour, min, sec );
printf(lcd_putc,"%2u/%2u/%2u\n%2u:%2u:%2u",mth,day,year,hour,min,sec);
delay_ms(250);
}
}

em không hiểu doạn này" printf(lcd_putc,"%2u/%2u/%2u\n%2u:%2u:%2u",mth,day,year,hour,min,sec);"chỗ "lcd_putc, " là the nào đấy ạ
cho em hỏi luôn muôn hoiển thi môt số thay đổi theo thời gian lên lcd thi câu lênh sẽ thế nào.ví dụ như hiển thị giờ , phút giây ấy
các cao thủ giúp em với nhé
thanks