Mity CPU Platforms » MitySOM-335x (ARM Cortex-A8 Based Products)

05/03/2016

08:54 AM Software Development: RE: iproute2 for SocketCAN with 3.2 Kernel

Okay, would you mind creating a forum post over there as it may help people find it in the future who are looking for... Jonathan Cormier

04:04 AM Software Development: RE: iproute2 for SocketCAN with 3.2 Kernel

Thanks for the quick response.
I'm afraid I posted this in the wrong topic yesterday, I am using an Industrial IO... edward lambert

05/02/2016

10:58 AM Software Development: RE: iproute2 for SocketCAN with 3.2 Kernel

Added a 335x specific CAN wiki page: [[Using_CAN_port]] Jonathan Cormier

10:44 AM Software Development: RE: iproute2 for SocketCAN with 3.2 Kernel

There should be no need to install any packages. I've attached our cantest script. It expects can0 to be connected ... Jonathan Cormier

10:38 AM Software Development: RE: iproute2 for SocketCAN with 3.2 Kernel

Which wiki page are you referencing? Jonathan Cormier

10:35 AM Software Development: iproute2 for SocketCAN with 3.2 Kernel

The iproute2 utility for linux 3.2 seems to be unavailable from opkg. I am therefore unable to run the example in the... edward lambert

04/25/2016

03:42 PM Software Development: RE: All devices on i2c on the AM335 SOM

The factory config definition can be found here:
http://support.criticallink.com/gitweb/?p=linux-mityarm-335x.git;a=... Jonathan Cormier

03:33 PM Software Development: RE: All devices on i2c on the AM335 SOM

Is there any way I can read the factory config eeprom and use that data to verify the correct SOMs are installed or u... Joseph Orender

04/20/2016

01:48 PM Software Development: RE: High latency for DMTimer interrupt

Mary, Thank you for this detailed post. Please let us know how this works out. Jonathan Cormier

01:44 PM Software Development: RE: High latency for DMTimer interrupt

Here's what I did to apply the RT PREEMPT patch:
Helpful websites:
https://rt.wiki.kernel.org/index.php/RT_PREEMP... Mary Frantz

04/15/2016

10:06 AM Software Development: RE: High latency for DMTimer interrupt

Note that the RT linux page also has an Ftrace guide: https://rt.wiki.kernel.org/index.php/Ftrace Jonathan Cormier

09:53 AM Software Development: RE: High latency for DMTimer interrupt

Hi Mary,
Regarding RT Linux I would specifically recommend https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO ... Gregory Gluszek

04/14/2016

11:43 PM Software Development: RE: High latency for DMTimer interrupt

Mary,
Here is a link to the RT Linux Wiki:
https://rt.wiki.kernel.org/index.php/Main_Page
There's a direct lin... Bob Duke

03:35 PM Software Development: RE: All devices on i2c on the AM335 SOM

I created a wiki page for this information. Let me know if it answers your question.
[[MitySOM-335x_I2C_Addresses]] Jonathan Cormier

04/13/2016

02:30 PM Software Development: All devices on i2c on the AM335 SOM

Hello,
I am writing some diagnostic software for our device to run through and make sure everything seems to be pr... Joseph Orender

11:09 AM Software Development: RE: High latency for DMTimer interrupt

Mary Frantz wrote:
> For more information about how the DM Timer works, refer the the AM335x Technical Reference Man... Jonathan Cormier

10:59 AM Software Development: RE: High latency for DMTimer interrupt

For more information about how the DM Timer works, refer the the AM335x Technical Reference Manual.
To summarize, ... Mary Frantz

10:09 AM Software Development: RE: High latency for DMTimer interrupt

Mary Frantz wrote:
> This code:
>
> [...]
>
> prints the value of 'start' (the counter value at the start of t... Jonathan Cormier

09:48 AM Software Development: RE: High latency for DMTimer interrupt

This code:... Mary Frantz

09:28 AM Software Development: RE: High latency for DMTimer interrupt

Mary Frantz wrote:
> I see this when the printk() call displays the last 16 'start' counter values.
What do you mea... Jonathan Cormier

08:58 AM Software Development: RE: High latency for DMTimer interrupt

No, this high latency is rare. Typical is more like 3 usec. I see this when the printk() call displays the last 16 ... Mary Frantz

04/12/2016

02:25 PM Software Development: RE: High latency for DMTimer interrupt

Hi Mary,
You mentioned that your maximum latency is ~500 usec. Is this maximum a rare or common occurrence? What ... Gregory Gluszek

02:02 PM Software Development: High latency for DMTimer interrupt

I have implemented a timer interrupt in a kernel module. At the start of the isr, it reads the timer value which sho... Mary Frantz