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DS1307

 
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Haytham
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DS1307
PostPosted: Mon Jul 23, 2007 5:53 am     Reply with quote
Dear All,
I want to use ds1307 RTC with PIC16F877A microcontroller.
I found the follwoing library:
Code:
#define DS1307_SDA  PIN_B1
#define DS1307_SCL  PIN_B0
#use i2c(master, sda=DS1307_SDA, scl=DS1307_SCL)

//==========================
// initial DS1307
//==========================
void init_DS1307()
{
   output_float(DS1307_SCL);
   output_float(DS1307_SDA);
}
//==========================
// write data one byte to
// DS1307
//==========================
void write_DS1307(byte address, BYTE data)
{
   short int status;
   i2c_start();
   i2c_write(0xd0);
   i2c_write(address);
   i2c_write(data);
   i2c_stop();
   i2c_start();
   status=i2c_write(0xd0);
   while(status==1)
   {
      i2c_start();
      status=i2c_write(0xd0);
   }
}
//==========================
// read data one byte from DS1307
//==========================
BYTE read_DS1307(byte address)
{
   BYTE data;
   i2c_start();
   i2c_write(0xd0);
   i2c_write(address);
   i2c_start();
   i2c_write(0xd1);
   data=i2c_read(0);
   i2c_stop();
   return(data);
}


But, I need to use pin RB0 as external interrupt.
I dont know how to modify this library such that it uses another pin instead of B0.

Can any body help me in modifying this library?
Thanl you


Please send me at email if you can:
hshyoukh@yahoo.com

[/code]
treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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PostPosted: Mon Jul 23, 2007 8:13 am     Reply with quote
It seems like you would just change
#define DS1307_SDA PIN_B1
#define DS1307_SCL PIN_B0
to use the pins of your circuit.
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