Webpage with reset push button
Just enter a password and click on the "reset/reboot" button
and a transistor/relay connected to pin PD7 will go on for
a second.
This is the software for the tuxgraphics.org
ethernet remote device. See http://tuxgraphics.org/electronics/
Copyright of most software and all diagrams: Guido Socher
Copyright of enc28j60.c/enc28j60.h Pascal Stang (http://www.procyonengineering.com/)
and small modifications by Guido Socher
License for everything: GPL V2
See http://www.gnu.org/licenses/gpl.html
---------------------------------------------------------------------------
All parts needed to build this AVR ethernet solution can be ordered from
http://shop.tuxgraphics.org/
Note that the magnetics need to fit exactly the requirements of the enc28j60
chip. You can not just take any transformer.
!! READ THIS FIRST !!
---------------------
! Edit the file main.c and change the 2 lines:
! static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x26};
! static uint8_t myip[4] = {10,0,0,26};
Check the file "Makefile" and make sure the MCU is set correctly:
MCU=atmega168
DUDECPUTYPE=m168
#MCU=atmega88
#DUDECPUTYPE=m88
#MCU=atmega328p
#DUDECPUTYPE=m328
Uncomment the correct lines.
For the first device you build you will not need to change the mymac line.
But you will probably need to change the IP address (myip). It must be a
free address from the address range in your home network.
There is a range of private addresses (not routed on the public internet)
which you can use:
Netmask Network Addresses
255.0.0.0 10.0.0.0 - 10.255.255.255
255.255.0.0 172.16.0.0 - 172.31.255.255
255.255.255.0 192.168.0.0 - 192.168.255.255
Example: you wlan router might have 192.168.1.1, your PC might have
192.168.1.2. This means you could e.g use 192.168.1.10 and leave some
room for more PCs. If you use DHCP then make sure that the address it not
double allocated (exclude it from the DHCP range).
You need an avr-gcc development environment in order to compile this.
You need at least avrlibc-1.4.x !! The atmega88 will not work with earilier
version. For atmega328 you will need avrlibc-1.6.4 or higher.
To compile the final software use the command:
make
The above command will compile the following hex files:
eth_rem_dev_tcp.hex test0.hex test1.hex test2.hex test_readSiliconRev.hex
The command
make load
will execute the avrdude command to load the software.
E.g something like:
avrdude -p m88 -c stk500v2 -e -U flash:w:eth_rem_dev_tcp.hex
! Note your programmer might interfer with the enc28j60! For the avrusb500
! with 30cm cable you can normally leave the cable on. For all other programmers
! it is however saver to remove the programmer cable and power down/up the device.
! This is because the SPI interface is used for loading of the software and
! communication to the enc28j60.
To see a list of all possible build targets run the command:
make help
Selecting the right clock source (fuse settings)
------------------------------------------------
Tuxgraphics hardware sold as of march 2007 is prepared to use the clock
signal from the enc28j60. To use this you need to change the
low fuse byte once from 0x62 to 0x60:
avrdude -p m88 -c avrusb500 -u -v -U lfuse:w:0x60:m
or just type in your Linux shell:
make fuse
After this the fuses should be as follows:
low fuse: 0x60
high fuse: 0xdf
ext. fuse: 0x01
Note: Older hardware must use the atmega88 internal clock (8MHz).
Don't try to change any fuse bytes on the older hardware!! You will
not easily be able to undo such an operation on the older hardware.
It will completely halt and nothing will work anymore.
The older hardware must use the factory default fuses which look like this:
low fuse: 0x62
high fuse: 0xdf
ext. fuse: 0x01
If you are unsure what the current fuse setting are on the atmega88
then you can read the fuse settings with a command like:
avrdude -p m88 -c avrusb500 -v -q
The result should be this (default factory settings):
avrdude: safemode: lfuse reads as 62
avrdude: safemode: hfuse reads as DF
avrdude: safemode: efuse reads as 1
Compiling on non-Unix systems
-----------------------------
Please use the provided Makefile
It will also work under Windows except for the loading
of the software. That is compiling will work but not
"make load". Use then whatever tools and commands to download
the resuting .hex file into the micrcontroller
Loading the test software
-------------------------
Test of the atmega88/168:
make test0.hex
make load_test0
This will case a LED on PB1 to blink with 1Hz
---------------
Edit the file test1.c and change the lines (see description above):
static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x26};
static uint8_t myip[4] = {10,0,0,26};
make test1.hex
make load_test1
The program will perform a LED test for the LEDs on the magjack.
The LEDs will go on and off after startup and then the green LED
should stray on indicating that the link is up. When you ping the circuit
it will answer. The yellow LED should blink when the a packet arrives.
The red LED on PB1 should go on/off with every ping packet.
---------------
Edit the file test1.c and change the lines (see description above):
static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x26};
static uint8_t myip[4] = {10,0,0,26};
make test2.hex
make load_test2
The green LED on the magjack should go on indicating that the link is up.
When you ping the circuit it will answer. The yellow LED should blink when
the a packet arrives.
Point your web browser to the
device: http://10.0.0.26
You should see a web page that says "OK, it works".
A simple web server example (not the eth_rem_dev_tcp.hex)
---------------------------------------------------------
The test_readSiliconRev.c (compiles to load_readSiliconRev.hex) reads
the enc28j60 silicon revision and displays it.
You can use it as a base for a simple application
where you want to just read data (e.g thermometer)
make
make load_readSiliconRev
Read via udp:
udpcom ver 10.0.0.26
will answer:
II: data: ver, ip: 10.0.0.26 port: 1200
OK: 10.0.0.26: ver=4
Read via webbrowser:
http://10.0.0.26
will display a webpage with:
ENC28J60 silicon rev is: 4
Using the webserver based Reboot/Reset button
---------------------------------------------
Point your web browser to
http://10.0.0.26 (or what ever IP address you have given your hardware)
You should get as answer a web page with (default password is "secret"):
Ethernet reset/reboot button:
Password: [ ]
[reboot]
------------------------------
version 2.12, tuxgraphics.org
Revision history
----------------
2008-08-31: version 2.12 -- First version of the reset pushbutton code. Based
on eth_rem_dev_tcp-2.11
2008-12-18: version 2.13 -- the stepcounter should be declared volatile
2008-12-27: version 2.14 -- adaptations for atmega328
# vim:sw=8:ts=8:si:et