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From 08/07/2014 to 09/05/2014

09/03/2014

01:24 PM Software Development: dma_free_coherent error in Kernel driver
I am having problems DE-allocating DMA memory space. Allocation works correctly with dma_alloc_coherent. I get the fo... Julio Liriano

08/29/2014

12:23 PM Software Development: RE: Compiling Memory Size into U-boot
I think I see my error.
The ubootenv.bin file doesn't go into any of the three partitions generated by that automat...
Julio Liriano
10:09 AM Software Development: RE: Compiling Memory Size into U-boot
From that script to combine the uBoot image with the rootFS as well as the uBoot blob, I gleaned that
to write the ...
Julio Liriano

08/28/2014

05:20 PM Software Development: RE: Compiling Memory Size into U-boot
We actually create the environment using *mkenvimage*, which takes a text file and then store this on the SD card, wh... Daniel Vincelette
04:57 PM Software Development: Compiling Memory Size into U-boot
I read this link:
https://support.criticallink.com/redmine/projects/mityarm-5cs/wiki/ARM_Software_FAQs
And I kno...
Julio Liriano
04:20 PM Software Development: RE: U-Boot with large uImage containing initramfs
I have attempted the following:
1.) Create .tar.gz rootfs with yocto
2.) Create ext3 ramdisk image of rootfs
3.)...
Nicholas Crast
12:42 PM Software Development: RE: U-Boot with large uImage containing initramfs
Michael Williamson wrote:
> We've run into this issue before on a different ARM based processor.
>
> The problem ...
Nicholas Crast
07:55 AM Software Development: RE: U-Boot with large uImage containing initramfs
We've run into this issue before on a different ARM based processor.
The problem is the linker for the kernel is p...
Michael Williamson
12:37 PM Software Development: RE: Memory Aligned Byte Array
Mike,
I will definitely need more than a single 4096 byte page. I can
call __get_free_pages() to allocate a con...
Julio Liriano
11:42 AM Software Development: RE: Memory Aligned Byte Array
Any kernel memory allocation is going to be page aligned (4K), it has to be. That's how the linux kernel memory mana... Michael Williamson
11:19 AM Software Development: RE: Memory Aligned Byte Array
Mike,
I'm writing a device driver to handle this DMA setup. I want the kernel to give me a chunk of physical memo...
Julio Liriano
07:09 AM Software Development: RE: Memory Aligned Byte Array
Not entirely sure what you are up to here.
Is your linux application running in user space? If it is, you may nee...
Michael Williamson

08/27/2014

02:11 PM Software Development: U-Boot with large uImage containing initramfs
Hi,
I am trying to boot from a uImage containing an initramfs with the mitySOM-5csx devkit. When I use the core-im...
Nicholas Crast

08/26/2014

03:16 PM Software Development: Memory Aligned Byte Array
Posted on behalf of a customer:
I have a byte array in my Linux application into which I want my DMA firmware to w...
Alexander Block

08/15/2014

01:44 PM Software Development: RE: How to add aditional HPS GPIO's
In the case described of wanting to add GPIO's to drive/control an LED (output from the HPS) you do not need to alter... Alexander Block

08/14/2014

10:51 AM Software Development: How to add aditional HPS GPIO's
Posting on behalf of a customer:
On the MitySom .dts file, you specify some GPIOS like this: ...
Alexander Block
10:49 AM Software Development: RE: PCI-e Device Driver - munmap related error
Reporting that the customer solved their problem:
I've solved the problem.
Thread A which was signaling Thread B...
Alexander Block

08/13/2014

04:21 PM Software Development: RE: Standard USB peripheral connection on MitySOM eval Board
Hi Mike,
Happy to hear that a procedure is needed because I tried many things to make it work (I noticed that in t...
Pierre-Yves BRETECHER

08/11/2014

07:23 AM Software Development: RE: Miscellaneous questions
Note:
you need to add "meta-openembedded/meta-oe" as the layer, not just "meta-openembedded".
-Mike
Michael Williamson
07:21 AM Software Development: RE: Miscellaneous questions
Hi,
Sorry. The i2c-tools recipe is part of the meta-openembedded layer that you don't get by default from the bas...
Michael Williamson
07:14 AM Software Development: RE: Miscellaneous questions
Hi Mike,
adding "i2c-tools" to IMAGE_INSTALL_append gives me this error while executing "bitbake core-image-basic"...
Pierre-Yves BRETECHER
 

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