Mity CPU Platforms » MityDSP-L138 (ARM9 Based Platforms)

06/22/2016

04:13 AM Software Development: RE: kernel 3.2 - tcpip stack latency

Hi Greg,
Than you for your feedback.
Indeed, flag CONFIG_PREEMPT is set in kernel config. As far as we can see... Patrice Bastiaens

06/21/2016

01:30 PM Software Development: RE: kernel 3.2 - tcpip stack latency

Hi Patrice,
Since you are using SCHED_RR I am assuming you are using CONFIG_PREEMPT in your kernel config, correc... Gregory Gluszek

06:26 AM Software Development: kernel 3.2 - tcpip stack latency

Hello,
We've built an application receiving messages from two devices at a rate of 1 message of 1440 bytes every 1... Patrice Bastiaens

06/17/2016

08:25 AM Software Development: RE: Flashing a new kernel to NOR from Linux rather than u-boot

Here are the results from my board/MDK:... Fred Weiser

06/16/2016

05:43 PM Software Development: RE: Flashing a new kernel to NOR from Linux rather than u-boot

Alternatively it may be possible for you to build the kernel features as modules and insert them in the live system. ... Jonathan Cormier

05:39 PM Software Development: RE: Flashing a new kernel to NOR from Linux rather than u-boot

Fred,
Do you have /dev/mtdblock* devices? My kernel boot args have this "root=/dev/mtdblock0", so my assumption i... Jonathan Cormier

05:26 PM Software Development: Flashing a new kernel to NOR from Linux rather than u-boot

We use opkg to push updates to our products that are installed in the field. We now need a way to update the kernel, ... Fred Weiser

06/15/2016

05:14 PM Software Development: RE: How to configure the GPIOs as outputs?

Do note that the custom baseboard instructions were written for the 335x family. So some things will be slightly diff... Jonathan Cormier

04:14 PM Software Development: RE: How to configure the GPIOs as outputs?

Héctor,
Please check the last section of this page for information on how to review and set the pinmux for the dev... Bob Duke

03:11 PM Software Development: How to configure the GPIOs as outputs?

Hi, it's me again,
I'm knowing the Profibus Development Kit (and embedded systems) and for that I'm trying to do s... Hector Bojorquez

11:00 AM Software Development: RE: Problems with the first time configuration

Now it's working, thanks a lot Jonathan! Hector Bojorquez

10:02 AM Software Development: RE: Problems with the first time configuration

Hector Bojorquez wrote:
> > This is a error is normal and doesn't hurt anything.
> *
> So, the reflashing process ... Jonathan Cormier

09:55 AM Software Development: RE: Problems with the first time configuration

> This is a error is normal and doesn't hurt anything.
*
So, the reflashing process went well?*
> If you don't h... Hector Bojorquez

08:38 AM Software Development: RE: Problems with the first time configuration

Hector Bojorquez wrote:
> >There shouldn't be a space in the console arg. "console=ttyS1,115200n8"
> >Also root sh... Jonathan Cormier

06/14/2016

05:45 PM Software Development: RE: Problems with the first time configuration

>There shouldn't be a space in the console arg. "console=ttyS1,115200n8"
>Also root should have an '=' not a '-'.
... Hector Bojorquez

03:35 PM Software Development: RE: Problems with the first time configuration

Hector Bojorquez wrote:
> Hi Jonathan,
>
> I made the changes, and yes the problem continues the same, I checked ... Jonathan Cormier

02:56 PM Software Development: RE: Problems with the first time configuration

Hi Jonathan,
I made the changes, and yes the problem continues the same, I checked the bootargs and this was the r... Hector Bojorquez

01:20 PM Software Development: RE: Problems with the first time configuration

Thanks for all the logs, definitely helpful. The kernel panic indicates that it failed to find the filesystem. See be... Jonathan Cormier

12:50 PM Software Development: RE: Problems with the first time configuration

Hi,
I followed the steps in the [[Reprogramming_a_Dead_Board]] guide and I got access to the u-boot prompt again, ... Hector Bojorquez

05:15 PM Software Development: RE: Specifics on reserving DDR for PRU/ARM shared use

Regarding your specific questions, yes, you could use memmap to set aside a particular chunk of memory. Where you set... Bob Duke

05:07 PM Software Development: RE: Specifics on reserving DDR for PRU/ARM shared use

Hi Andrew,
I recommend you review the TI-provided documentation and examples for the PRU available here:
<https... Bob Duke

06/13/2016

05:14 PM Software Development: RE: JFFS2 "scheduling while atomic" problem with L138 running linux kernel 3.2

Sorry I missed that Fred.
You can just make the change (swapping two lines) yourself for testing, or you can appl... Bob Duke

05:12 PM Software Development: RE: JFFS2 "scheduling while atomic" problem with L138 running linux kernel 3.2

Note we can list any other jffs patches that is in the linux-3.2.y branch that isn't in ours by doing the following:
... Jonathan Cormier

05:07 PM Software Development: RE: JFFS2 "scheduling while atomic" problem with L138 running linux kernel 3.2

The patch was included in the 3.2.18 kernel release. You can cherry-pick the patch from there to verify it fixes you... Jonathan Cormier

04:56 PM Software Development: RE: JFFS2 "scheduling while atomic" problem with L138 running linux kernel 3.2

Looks like someone already did the backport of the fix. The patch is very straight forward.
https://github.com/Angs... Jonathan Cormier

04:28 PM Software Development: RE: JFFS2 "scheduling while atomic" problem with L138 running linux kernel 3.2

Ah, yes, so this is indeed the problem; the code you show above is _before_ the fix. The issue is mutex_lock cannot f... Fred Weiser

02:48 PM Software Development: RE: JFFS2 "scheduling while atomic" problem with L138 running linux kernel 3.2

Fred,
The current MityDSP-L138 kernel (Branch: mitydsp-linux-v3.2) has the following code in @fs/jffs2/gc.c@:
... Bob Duke

10:18 AM Software Development: JFFS2 "scheduling while atomic" problem with L138 running linux kernel 3.2

I have been getting a lot of "scheduling while atomic" messages seemingly centered around JFFS2:
@Jun 12 12:08:37 ... Fred Weiser

06/10/2016

12:20 PM Software Development: Specifics on reserving DDR for PRU/ARM shared use

The note in the wiki article for getting started with PRU mentions the following:
??A safe design that wanted to u... Andrew Bean

11:34 AM Software Development: RE: Problems with the first time configuration

Hector, I'm not sure what commands you ran but the nand commands you show shouldn't have created this. It appears y... Jonathan Cormier

11:04 AM Software Development: RE: Problems with the first time configuration

I followed the Guide without errors advice, and at the final step I got the attached text (MKD_Update_End)
But whe... Hector Bojorquez

06/09/2016

06:04 PM Software Development: RE: Problems with the first time configuration

Hector Bojorquez wrote:
> >Both the nfsd and portmap services are not critical during boot and should not cause it t... Jonathan Cormier

05:51 PM Software Development: RE: Problems with the first time configuration

>Both the nfsd and portmap services are not critical during boot and should not cause it to hang. Its possible some... Hector Bojorquez

04:05 PM Software Development: RE: Problems with the first time configuration

Both the nfsd and portmap services are not critical during boot and should not cause it to hang. Its possible some ot... Jonathan Cormier

03:42 PM Software Development: RE: Problems with the first time configuration

Sorry I used to take pictures because the machine where is installed Vbox has no access to the network, even if I ne... Hector Bojorquez

01:47 PM Software Development: RE: Problems with the first time configuration

Hector Bojorquez wrote:
> Hi Jonathan,
>
> Since I got the HelloWorld I just played with some simple code and it ... Jonathan Cormier

11:32 AM Software Development: RE: Problems with the first time configuration

Hi Jonathan,
Since I got the HelloWorld I just played with some simple code and it worked well, but today when I t... Hector Bojorquez

06/02/2016

02:39 PM Software Development: RE: Pinmux changes back on its own

Hi Jonathan, thanks for looking into this. The L138 technical reference manual does show many of the SYSCFG registers... Andrew Bean

01:50 PM Software Development: RE: Pinmux changes back on its own

Found this post for the 335x which mentions that the pinmux registers are protected. Its likely this is also true fo... Jonathan Cormier

01:30 PM Software Development: RE: Pinmux changes back on its own

I can confirm that doesn't appear to work.... Jonathan Cormier

10:29 AM Software Development: RE: Pinmux changes back on its own

I was able to compile busybox (after making an empty syncfs() function in sync.c as a quick workaround), and here's w... Andrew Bean

01:39 PM PCB Development: RE: Questions about my product version

I got this:
>root@mityomapl138:~# dmesg | grep 'Part Number'
>MityOMAPL138: Part Number = 1810-DG-255-RC
So I ... Hector Bojorquez

01:22 PM PCB Development: RE: Questions about my product version

Hector,
To determine the model of a specific module please refer to the label that is located on the bottom side o... Alexander Block

01:14 PM PCB Development: RE: Questions about my product version

During the linux boot, it should print out the model number of the module. Here is what my L138 prints out:... Jonathan Cormier

12:25 PM PCB Development: Questions about my product version

Hello everybody,
I requested for a MitySOM-1810F + PROFIBUS-development kit from Avnet, and I got kind of confused... Hector Bojorquez

08:51 AM Software Development: RE: Problems with the first time configuration

Note the old filesystem has an outdated url for opkg. Angstrom moved their feeds to here: http://feeds.angstrom-dist... Jonathan Cormier