how to set time and date from keypad

[samuel.sam77]

hi dear

i am doing Rtc using ds1307 with pic16f877a

i need a help how to set time and date from keypad by using this function

ds1307_set_date_time(31,12,9,2,23,59,55);//day, month,year,dow,hr,min.sec

from this

void ds1307_set_date_time(BYTE day, BYTE mth, BYTE year, BYTE dow, BYTE hr, BYTE min, BYTE sec)
{
sec &= 0x7F;
hr &= 0x3F;

i2c_start();
i2c_write(0xD0); // I2C write address
i2c_write(0x00); // Start at REG 0 - Seconds
i2c_write(bin2bcd(sec)); // REG 0
i2c_write(bin2bcd(min)); // REG 1
i2c_write(bin2bcd(hr)); // REG 2
i2c_write(bin2bcd(dow)); // REG 3
i2c_write(bin2bcd(day)); // REG 4
i2c_write(bin2bcd(mth)); // REG 5
i2c_write(bin2bcd(year)); // REG 6
i2c_write(0x80); // REG 7 - Disable squarewave output pin
i2c_stop();
}



i have 4 four keys connected porta with pullup

i have to do menu function to set time and date

any one help me i am using ccs c complier pic 16f877a

 

[panic mode]

only 4 keys?
how about making them:
Increment, Decrement , Next , Set

first two would edit parameter value,
next would be used to select parameter to be edited,
set would call function that finally writes the parameters to DS1307

 

[samuel.sam77]

thanks panic ,give me a sample code to slelect menu mode to set time (call function)

keys are menu ,up ,next,set.....

 

[Ian Rogers]

I use 4 keys on ALL my units....
Up, Down, Enter and next... If two keys are pressed at the same time ( up and down ) it clears.

I also have done a shift on the first key, so I can have six functions...

Here is my security entry function:- Maybe it will help.

char security()
	{
	int code = 0;
	char key=0;
	I2cReadStr(lcdbuf,0x390,16);  // ignore this its an external string in I2C eeprom
	LCDline(1);
	LCDprint(lcdbuf);
	while(1)
		{
		sprintf(lcdbuf,"      %04d      ",code);
		LCDline(2);
		LCDprint(lcdbuf);
		key = keyhit();
		if(key == 4)
			{
			if(code == CODE ) return 1;
			else return 0;
			}
		if(key == 1 && code < 10000 )
			code*=10;
		if(key == 2 )
			code++;
		if(key == 3 && code)
			code--;
		if(key == 5)
			code = 0;
		}
	}