[etherlab-users] etherlab-users Digest, Vol 93, Issue 3

[Xinhua Gan]

Sebastien, 
Thank you for sharing.
Xinhua
 
> From: etherlab-users-request at etherlab.org
> Subject: etherlab-users Digest, Vol 93, Issue 3
> To: etherlab-users at etherlab.org
> Date: Tue, 17 Feb 2015 12:00:01 +0100
> 
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> Today's Topics:
> 
>    1. Example for Kollmorgen AKD servo drive in digital	torque mode
>       (Sebastien Blanchet)
>    2. SKIPPED datagram using Igh EtherCAT master porting for Linux
>       OS on CyconeV SoC (Brian Cheng)
>    3. Re: SKIPPED datagram using Igh EtherCAT master	porting for
>       Linux OS on CyconeV SoC (Gavin Lambert)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 16 Feb 2015 18:27:33 +0100
> From: Sebastien Blanchet <blanchet at iram.fr>
> To: "etherlab-users at etherlab.org" <etherlab-users at etherlab.org>
> Subject: [etherlab-users] Example for Kollmorgen AKD servo drive in
> 	digital	torque mode
> Message-ID: <54E22885.4030406 at iram.fr>
> Content-Type: text/plain; charset="utf-8"; Format="flowed"
> 
> Hi,
> 
> This is a full example for the Kollmorgen AKD servo drive.
> It shows how to configure the free PDO mapping and how to setup the DS402 state 
> machine to start the servo drive in digital torque mode with IgH EtherCAT Master 
> library.
> 
> best regards,
> -- 
> Sebastien BLANCHET
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> ------------------------------
> 
> Message: 2
> Date: Tue, 17 Feb 2015 08:43:32 +0800
> From: Brian Cheng <berwechy at gmail.com>
> To: etherlab-users at etherlab.org
> Subject: [etherlab-users] SKIPPED datagram using Igh EtherCAT master
> 	porting for Linux OS on CyconeV SoC
> Message-ID:
> 	<CA+E+ou2fSi0ZMu=FZNsT8GVDB5jcguM_w+jssZQ2fxmyUVPfvQ at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Hi,
> 
> Does anyone could run short cycle(<<1ms) well using Igh EtherCAT master for
> linux-RT of Cyclone V (ARM CortexA9 925Mhz) ?
> 
> I got the linux-socfpga.git for downloading Linux-3.10-ltsi-rt.
> I already put the EtherCAT module & application on the Linux-RT Helio board
> for Cyclone V.
> It could run well as communication cycle as 10 ms.
> 
> And the Ethernet port will block when  using 1ms transmit rate.
> SKIPPED datagram always occur.
> It seems that the delay of ethernet transmit/receive function is too long.
> 
> Has anyone already verify the situation or anyone could point out the delay
> issue?
> 
> Thanks a lot.
> 
>           Brian
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> ------------------------------
> 
> Message: 3
> Date: Tue, 17 Feb 2015 14:08:52 +1300
> From: "Gavin Lambert" <gavinl at compacsort.com>
> To: "'Brian Cheng'" <berwechy at gmail.com>,
> 	<etherlab-users at etherlab.org>
> Subject: Re: [etherlab-users] SKIPPED datagram using Igh EtherCAT
> 	master	porting for Linux OS on CyconeV SoC
> Message-ID: <000301d04a4e$4b6f3c30$e24db490$@compacsort.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Are you using the generic ethernet driver or one of the provided EtherCAT-enabled drivers?  What HZ is your kernel using?
> 
>  
> 
> On standard x86 hardware, you?re unlikely to get much better than 4 ms cycle rates even on Linux+PREEMPT_RT if you?re using the generic driver.  Since you?re using more cut-down hardware, it wouldn?t surprise me if this were more limited.
> 
>  
> 
> From: etherlab-users [mailto:etherlab-users-bounces at etherlab.org] On Behalf Of Brian Cheng
> Sent: Tuesday, 17 February 2015 13:44
> To: etherlab-users at etherlab.org
> Subject: [etherlab-users] SKIPPED datagram using Igh EtherCAT master porting for Linux OS on CyconeV SoC
> 
>  
> 
> Hi,
> 
> Does anyone could run short cycle(<<1ms) well using Igh EtherCAT master for linux-RT of Cyclone V (ARM CortexA9 925Mhz) ?
> 
> I got the linux-socfpga.git for downloading Linux-3.10-ltsi-rt.
> I already put the EtherCAT module & application on the Linux-RT Helio board for Cyclone V.
> It could run well as communication cycle as 10 ms.
> 
> And the Ethernet port will block when  using 1ms transmit rate.
> SKIPPED datagram always occur.
> It seems that the delay of ethernet transmit/receive function is too long.
> 
> 
> Has anyone already verify the situation or anyone could point out the delay issue?
> 
> 
> 
> Thanks a lot.
> 
>           Brian              
> 
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