Master Slave Clocks with PIC16F887

[granddad]

Ian is your second name Job ... as in patience of...

 

[koolguy]

there should sensor i.e. ADC to detect power failure and store in Memory.

I think i should be stored in EEPROM or internal register of DS1307.

 

[koolguy]

Hello sir,
I have changed some code!
actually i am once writing the time in micro. after that i am removing/re programming the micro by deleting the write function.
so, it run internally the ds1307 chip...
it is working is it fine procedure to run ds1307??

 

[koolguy]

Hello,
The Clock is running internaly i have set the time one and removed the write function for making update from outter switch!
i have place the up and down switch with pull ups at RD4-5 . but it is not responding here is if code parrts

if(RD4==0|| RD5==0){
//Time[] = {0x05, 0x30 ,0x08, 0x22 , 0x10, 0x4, 0x15};

if(RD4==0) // UP MIN HOUR
{
up_min= up_min+1;
up_hour=up_hour+1;
Time[1]=up_min;
Time[2]=up_hour;
WriteClock(&Time[0]);
}
if(RD5==0) // UP MIN HOUR
{
up_min= up_min-1;
up_hour=up_hour-1;
Time[1]=up_min;
WriteClock(&Time[0]);
Time[2]=up_hour;

}
}

 

[koolguy]

Hello,
ds3231 vs ds1307 which better?
Is Ds1307 fine for RTC projects??

 

[Ian Rogers]

Hi R... I have been in Scotland these past few days.... Please give me a while to catch up!!

I always use the DS1307.. Can't comment about the other one...

 

[Mosaic]

This is what I used for i2c, my code is in asm though, 16F886.
https://ww1.microchip.com/downloads/en/DeviceDoc/i2c.pdf

 

[koolguy]

Hello,
How to add external time set switch to update clock?

 

[koolguy]

hello,
I don't know how to write, need guidance.

  if(RD5==1){
unsigned char a=0;
a=a+1;
}
if(RD6==1){
unsigned char a=0;
a=a-1;
}
WriteClock(&Time[0]);
  }
  }  
unsigned char Time[] = {0x11, 0x11 ,0x11, 0x00 , 0x10, 0x4, 0x15};

 

[Ian Rogers]

The function I wrote was this

void WriteClock(char *array)       // Not used
   {
   char x;
   int tmp;
   for(x=0;x<7;x++)
     {
     tmp = array[x] / 10;
     tmp << = 4;
     tmp += array[x] % 16;
     WriteRTC(x,tmp);
     } 
   }

This function takes care of writing to the RTC... The array is pointing to the Time[] array.. Whatever is in that array will be written to the RTC... The function also takes care of the BIN / BCD conversion, so you don't need to!!