How to connect different PIC micros using CAN?

Hey,

I am new to CAN (Controller Area Network)...

I want to connect different PIC microcontrollers togather...

Can you suggest some ideas and reading materials (resources), and links to get started with it?????


I appreciate your help & thanks...


(I usually click the "Helped Me" button if you do help me)

mcp2551

Google is your friend.
I suggest these pages.
Start with to understand what CAN is
http://en.wikipedia.org/wiki/Controller_Area_Network

From microchip to understand PIC and CAN
http://ww1.microchip.com/downloads/en/AppNotes/00738b.pdf
http://ww1.microchip.com/downloads/en/AppNotes/00877a.pdf

This should be of interest
CAN bus analyser with PIC18F458
**broken link removed**

3v0

pic18/picanalyser

You need a tranceiver chip to convert the canRx and canTx signals from the Pic to the differential can bus lines, can high and can low. A common choice is the Philips TJA1050, or Microchip do a tranceiver which is pin compatable, cant remember the part number off hand but you will find it on the Microchip web site. Can bus is terminated by 120R loads each end. You need at least two nodes to talk to each other or you wont see any signals on the can bus. Look for AN754 on Microchip for some information on the baud rate and timing. Also check out Microchip forums can thread, a lot of info there.
Can is a broadcast protocol, all nodes receive every message, the can hardware takes care of arbitration and error checking. So it's quite easy to use at the transport layer. Each message has a Can ID, a can type and up to 8 bytes of data. The node decides from the ID whether to act on the message. which can be masked and filtered by the hardware.
Of course, on top of this can be built some pretty hairy high level protocols.

canbus analyser schematic

hello
u have to read the can specs by bosch find them easily on the internet too
its really easy and if u need any help dont hesitate to contact me

microchip can bus analyzer

btbass said:

or Microchip do a tranceiver which is pin compatable, cant remember the part number off hand but you will find it on the Microchip web site.

Click to expand...

I think you mean MCP2551 from Microchip

canbus analyzer schematics

>>This should be of interest
>>CAN bus analyser with PIC18F458
>>h**p://perso.orange.fr/softelec/Projects/PIC18/PICANalyser/Projects_PIC18_PICANalyser_us.htm

What is the quarz frequence in PICCANAnalyser?

pic18f452+rs485 in diffrent node+pdf

En_Serg said:

>>This should be of interest
>>CAN bus analyser with PIC18F458
>>h**p://perso.orange.fr/softelec/Projects/PIC18/PICANalyser/Projects_PIC18_PICANalyser_us.htm

What is the quarz frequence in PICCANAnalyser?

Click to expand...

Typical values used in Automotive industry are 8Mhz, 16Mhz (or any multiple of 8Mhz). This is due to the standard in automotive industry is to use 8 clock cycles per bit, so choosing a multiple of 8Mhz gives exactly any required baud rate without any fractions.

+can +bus +microchip +help

yasser_shoukry said:

btbass said:

or Microchip do a tranceiver which is pin compatable, cant remember the part number off hand but you will find it on the Microchip web site.

Click to expand...

I think you mean MCP2551 from Microchip

Click to expand...

NO... I want to connect & synchronize two or three PIC16F877A IC's to work togather... I need to operate Three Timer1 modules in my project, so i gotta connect 3 PIC's.... May in Master/Slave configuaration....


Got any suggestions ?????

pic18f simple node can bus

CAN bus analyser with PIC18F458

from another forum they say 10 Mhz x 4pll = 40 Mhz

Looking picture,I´d like to try.
Looks easy,but anyone have schematic or description circuit, eg. port to led´s?

thanks!

Added after 10 minutes:

CAN bus analyser with PIC18F458

from another forum they say 10 Mhz x 4pll = 40 Mhz

Looking picture,I´d like to try.
Looks easy,but anyone have schematic or description circuit, eg. port to led´s?

thanks!

microchip canbus schematic

I want to connect different PIC microcontrollers togather

Click to expand...

Is it inside or outside the same board?

Added after 4 minutes:

NO... I want to connect & synchronize two or three PIC16F877A IC's to work togather... I need to operate Three Timer1 modules in my project, so i gotta connect 3 PIC's.... May in Master/Slave configuaration....


Got any suggestions ?????

Click to expand...

I think you can use a SPI or I2C or UART to synch those three PIC on the same board, CAN normally used between boards.

canbus 10mhz

CAN uses a balanced line voltage system that has good noise immunity through a single pair of wires over a long distance. RS485 uses the same electrical principal.

can bus analyzer microchip

if you need a monitor CAN you can use a canking microchip version, but you will to make ahttp://perso.orange.fr/softelec/Projects/PIC18/PICANalyser/Projects_PIC18_PICANalyser_us.htm hardware to conect the pc throut parallelal port check up