Mity CPU Platforms

09/03/2014

01:24 PM MitySOM-5CSX Altera Cyclone V 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

09/02/2014

08:33 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: How to probe the fpga_ctrl & fpga_gpio.ko module

Have you made any progress with this problem? Jonathan Cormier

08/29/2014

12:23 PM MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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

08/19/2014

11:31 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: How to probe the fpga_ctrl & fpga_gpio.ko module

yes,
echo "146" > /sys/class/gpio/export --> sh: write error: Invalid argument
it may be that fpga_gpio... HYUNG KI KIM

08:50 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: How to probe the fpga_ctrl & fpga_gpio.ko module

Did you mean ... Jonathan Cormier

08:26 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: How to probe the fpga_ctrl & fpga_gpio.ko module

HYUNG KI KIM wrote:
> I'm tryint to control FPGA of GPIO on the linux driver side with MityL138-DSP(L138-FI-236-RL)... HYUNG KI KIM

08:24 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: How to probe the fpga_ctrl & fpga_gpio.ko module

HYUNG KI KIM wrote:
> I'm tryint to control FPGA of GPIO on the linux driver side with MityL138-DSP(L138-FI-236-RL)... HYUNG KI KIM

08:23 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: How to probe the fpga_ctrl & fpga_gpio.ko module

I'm tryint to control FPGA of GPIO on the linux driver side with MityL138-DSP(L138-FI-236-RL) mdule.
and, loading t... HYUNG KI KIM

08/18/2014

04:31 PM MityDSP-L138 (ARM9 Based Platforms) PCB Development: RE: Protecting MityDSP module during development

Hi Udi,
Yes the FPGA I/Os can be damaged by sinking too much current - powered or off. The I/Os have protection d... Adam Dziedzic

03:39 PM MityDSP-L138 (ARM9 Based Platforms) PCB Development: Protecting MityDSP module during development

We just fried a MityDSP L138F module, and I'm not sure why. I'm suspecting that the problem was that we had an ADC mo... Udi Fuchs

08/15/2014

01:44 PM MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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

09:21 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: DSP HelloWorld Compile with gcc 4.3.3

tftp stalls when I set the block size larger than the standard MTU size (1500 - overhead = 1468). According to the so... Jonathan Cormier

09:06 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: DSP HelloWorld Compile with gcc 4.3.3

Glad that you got it working. I've never used the block size feature. I'll check out what affect it has on my tftp d... Jonathan Cormier

07:23 AM MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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 MitySOM-5CSX Altera Cyclone V 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

08/08/2014

03:20 PM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: DSP HelloWorld Compile with gcc 4.3.3

Successful tftp transfer of mityomap-full.jffs2 from VM to L138 ARM core! Tried setting the blocksize to 4096 in u-bo... Doug Browning

12:58 PM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: DSP HelloWorld Compile with gcc 4.3.3

Occasionally I see timeouts during the transfer but I haven't seen windows or the vm crash during a tftp transfer.
... Jonathan Cormier

10:52 AM MityDSP-L138 (ARM9 Based Platforms) Software Development: RE: DSP HelloWorld Compile with gcc 4.3.3

Thank you for the filesystem update procedures. I was able to successfully complete steps 1-5 (writing UBL_SPI_MEM.a... Doug Browning