What type is better Full duplex or half duplex in ENC 28J60

[arunb]

Hi,

What is best recommended for a 4 Mhz PIC using a ENC 28J60 , full duplex or half duplex operation ??

thanks
arunb

[Ttelmah]

Really no answer.
It is a bit like saying 'what is better, a car or a van'. The car is smaller, and possibly more convenient to park, but carries less. At 4MHz, the PIC won't really be able to keep up for long anyway.

Best Wishes

[asmallri]

[arunb]

Hi,

Thank you for the reply.

After setting up the MAC,PHY layesr and the buffers, what kind of packets must I send to the PC or receive from it, when the PC is configured as a DHCP client ??

thanks
arunb

[asmallri]

I am not sure what you mean. If you are using a crosover cable to connectthe PIC directly to the PC's Ethernet port then you cannot use a DHCP client on the PC unless you have written a DHCP Server application on the PIC.

If you mean you have a PIC connected to an Ethernet Network via a switch or a hub and the PC is configured for DHCP and some other device (usually a router) is configured as a DHCP server then the answer is "it depends"

The ENC28J60 is just an Ethernet controller. It talks at the MAC layer. If your application does not require a higher layer protocol, such as IP, then you can develop you application that transmits and receives packets at the MAC layer - you could for instance develop NETBIOS applications. If you want to be able to use an IP stack then you need to implement a stack yourself. The ENC28J60 is loosely based on the old NE2000 type Ethernet controller and you can find lots of documentation for the NE2000 on the web. Once you understand the NE2000 driver architecture it is relatively straight forward to delevep drivers for ENC28J60.

There are free examples available. CCS has a TCP/IP stack implementation for the PICENS board (uses the ENC28J60) or you could use the Microchip TCP/IP stack. Both of these stacks include the ENC28J60 drivers.

If you want examples of how to implement an application including both the PIC and PC sides then you might want to look at my site. I sell source code for example apps using either CCS or MCHP compilers.
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!

[arunb]

Hi,

Thank you for the reply, indeed I will consider buying source code from you, but I have already developed most of the low level drivers for the ENC28J60 controller by myself.

Although I am able to send ARP requests/responses to the PC, I find reading the receive buffer memory tough..

Can suggest any tuturials for reading the Receive buffer memory ??

thanks
arunb

[asmallri]