Hammer How to Enc28j60
First you have to get an Enc28j60, the following links may be usefull:
Next we will be soldering it on to the Hammer Carrier
We will use the 3.3V regulator of the Hammer Carrier, but you already need ** to have done the Hammer_How_to_Switching_5V_Regulator. (if it existed, that would be a link)
\*\* Newer boards are supplied with a 5V wall wart capable of 1A (output drops to 4.8V) the onboard 3.3V regulator on the carrier is capable of about 500mA of its 800mA manuf rating because of heatsinking. THE 3.3V OUTPUT OF THE HAMMER IS ONLY RATED FOR 50mA!!!
\* WATCH VERSION, on newer board revs, this is NOT +3.3V!!!!
Also make sure that your 5V main power supply can supply the Hammer as well as the ENC28J60-H.
I used a socket strip that keeps the board about 1/2 inch above the Hammer_Carrier prototype area. This may be important because the PIC chip on the ENC28j60 gets quite warm.
Software driver info:
The Good Kernel SPI API The Bad The 2.4 driver The Ugly The current 2.6 "driver" included in the kernel patch at Hammer_Board_Software
The driver may either be compiled as a module, or as a part of the kernel. If you are running short on space for the kernel, it's probably advisable to compile it as module.
The SPI channel that is reserved for the ethernet on the Hammer Carrier board is SPI0. The MMC interface uses SPI1. The current UBE (Ugly But Effective) driver may need to be re-configured if you are going to use anything but the Hammer Carrier.