Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

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