easy, you implement a soft UART on the pins. The hardware UART unit resides on PORTB pins in this device.

Best regards,
Lieven.

Here’s the code.

/*************************************************************
* EEPROM data memory interface for PIC12f683 devices
*
* Allows for read and write of the program memory.
*
* Warning! Interrupts are disabled during write !
*
* Based on code by
* (c) Lieven Hollevoet
*************************************************************/
#include “eeprom.h”

////////////////////////////////////////////////////////////
// Read an EEPROM memory location. Takes the address as input
// and returns the data at the memory location.
//
// The function is based on the Microchip document DS41211D
// page 75.
////////////////////////////////////////////////////////////
char eeprom_read(char address){

// Load address
eeadr = address;

// Read, data is available in eedata the next cycle.
eecon1.RD = 1;

// Return value
return eedata;

}

////////////////////////////////////////////////////////////
// Writes a byte to the data EEPROM.
// Interrupts are disabled during this routine.
//
// The function is based on the Microchip document DS41211D
// page 75.
////////////////////////////////////////////////////////////
void eeprom_write(char address, char data){

// Wait for any other write to complete
while (test_bit(eecon1, WR)){};

// Load address and data
eeadr = address;
eedata = data;

// Write enable
set_bit(eecon1, WREN);
// Disable interrupts
clear_bit(intcon, GIE);

// Required write sequence
eecon2 = 0×55;
eecon2 = 0xAA;
set_bit(eecon1, WR);

// Disable write
clear_bit(eecon1, WREN);
// Enable interrupts
set_bit(intcon, GIE);
}

you can find an example project using the MCP2515 routines in my googlecode SVN repository.

Link

Best regards,
Lieven.

im interested in interfacing an MCP2515 onto a PIC18F4550, but i did not find the following files in the package: mcp2515_test.c, mcp2515_test.h – although they are listed in mcp2515.__c

can You pls add them to the package?

this is a great package, N3310 LCD works fine on my digital pressure gauge project, thx!

good to hear that the LCD routines also work on a 16F887.

Concerning the line selection: I don’t really understand the problem you describe. If you only have a single-line LCD, I assume there is no sense in putting data on line 2? I don’t see how I could update the library for that. Why do you call line2?

For the baudrate setting of the serial routines: depending on the hardware you have, the baudrate you want to obtain and the oscillator you use, you should pass a value to the ‘serial_init’ function. This value can be determined by getting the correct value from the datasheet of the device you’re using. The value you need is used for the baudrate generator in the UART block of the PIC.
You will find 2 tables in the datasheet: one for BRGH = 0 and one for BRGH = 1. This is a bit that is set in the TXSTA register. In my library, it is set to ’1′, so pick the correct table, or modify the library code if you need the other table.

For the OneWire libs: those should work out of the box. I have a circuit using those libs running for several year now, so most bugs should already be ironed out

Best regard!
Lieven.

LCD works, but I have a One Line LCD. So I have only 8 characters, and then I call line 2.
I wish there was a selection of type of LCD?

A selection for how many Lines a display has?

Using RealTerm, I can’ get the Serial out to be readable? So my RS232 is bad.

Can you discribe what Baudrate I should be trying?

I am Using 8MHz crystal.
Next I want to do One Wire!

Thanks!
Mike