[etherlab-users] Using EtherCAT EoE and Build Errors

[Thomas Bitsky, Jr.]

Regarding my build problems, it appears you need to build the program as a
kernel module and not as a user-mode program. I haven't tested the results
yet, but I have been able to get the program to build.

On Tue, Aug 14, 2012 at 7:29 AM, Matthieu Bec <mbec at gmto.org> wrote:

>
> Hello Thomas,
>
> it might be a simple network config problem: the IP address of your
> virtual interface shouldn't be the same as your field device. Try assigning
> it something different on the same subnet, e.g. 192.168.127.1/8 and check
> your routing table is correct
>
> Regards
>
> On 08/13/12 22:21, Thomas Bitsky, Jr. wrote:
>
>> Hello! I'm new to using EtherLAB. I've got the master installed as a
>> service, and it's communicating to the network fine. However, I'm having
>> trouble getting the EoE feature up and running.
>>
>> I have an Ethernet device in the field with the IP Address
>> 192.168.127.254 that I need to communicate with through a web browser. I
>> have an EL6601 that the master is able to see fine. When I put the
>> network into Operation, the RUN light goes steady.
>>
>> I'm running on Ubuntu 10.04. I have not installed any real-time
>> extensions; I'm just working with EtherLAB right now.
>>
>> If I execute:
>> # ethercat eoe
>>
>> I get a listing for eoe0s7 as a virtual interface, and that it is down.
>>
>>
>> So, I created in /etc/network the file ifcg-eoe0s7 with the following
>> contents:
>>
>> IPADDRESS=192.168.127.254/8 <http://192.168.127.254/8>
>> STARTMODE=auto
>>
>> I restarted the computer.
>>
>> To raise the interface, I enter:
>>
>> # ifconfig eoe0s7 up
>>
>> The virtual interface goes up, and the LINK light on the EL6601 goes
>> solid green.
>>
>> However, I'm unable to ping 192.168.127.254, or get the pages it serves
>> to pop up. So, I did more reading, and I think I need to do some
>> function calls in the program. So, I added to my test program:
>>
>>
>> void send_callback(void *cb_data)
>> {
>>      ec_master_t *m = (ec_master_t *) cb_data;
>>      sem_wait(&mutex);
>>      ecrt_master_send_ext(m);
>>      sem_post(&mutex);
>> }
>>
>> /***************************************************************
>> ******************/
>>
>> void receive_callback(void *cb_data)
>> {
>>      ec_master_t *m = (ec_master_t *) cb_data;
>>      sem_wait(&mutex);
>>      ecrt_master_receive(m);
>>      sem_post(&mutex);
>> }
>>
>> int
>> main(int argc, char **argv)
>> {
>>
>> ...
>>
>>   // setup callbacks for EoE
>>   ecrt_master_callbacks(master, send_callback, receive_callback, master);
>>
>> ...
>>
>> }
>>
>>
>>
>> However, it won't build:
>>
>> durability.o: In function `send_callback':
>> /home/tbj/srcroot/durability/**src/durability.c:279: undefined reference
>> to `ecrt_master_send_ext'
>> durability.o: In function `main':
>> /home/tbj/srcroot/durability/**src/durability.c:321: undefined reference
>> to `ecrt_master_callbacks'
>>
>>
>> This is my makefile:
>>
>> CC = gcc
>> ETHERCAT_TOPDIR = /home/tbj/srcroot/ethercat
>> CFLAGS = -I$(ETHERCAT_TOPDIR)/include -g -O2
>> LDFLAGS = -L$(ETHERCAT_TOPDIR)/lib/.libs -lethercat -lrt
>>
>> OBJECTS = durability.o
>>
>> durability.exe : $(OBJECTS)
>> $(CC) $(CFLAGS) $(OBJECTS) $(LDFLAGS) -o durability.exe
>>
>> %.o : %.c
>> $(CC) $(CFLAGS) -c $<
>>
>>
>> Can anyone tell me what I'm missing? I feel like I'm one step away from
>> having this working, but I can't find anything else in any documentation
>> that would lead me to the answer.
>>
>> Thanks in advance for any help.
>>
>> T
>>
>>
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>>
>>
>
> --
> Matthieu Bec                GMTO Corp.
> cell:  +1 626 354 9367      P.O. Box 90933
> phone: +1 626 204 0527      Pasadena, CA 91109-0933
>
>


-- 
Thomas C. Bitsky Jr.
Lead Developer and Application Engineer
ADC | automateddesign.com
P: 630-783-1150 F: 630-783-1159 M: 630-632-6679
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