Project

General

Profile

Activity

From 07/26/2014 to 08/24/2014

08/19/2014

11:31 AM 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 Software Development: RE: How to probe the fpga_ctrl & fpga_gpio.ko module
Did you mean ... Jonathan Cormier
08:26 AM 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 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 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 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 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

08/11/2014

09:21 AM 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 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

08/08/2014

03:20 PM 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 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 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

08/07/2014

08:54 AM Software Development: RE: DSP HelloWorld Compile with gcc 4.3.3
I created a how to for updating an L138 devkit. Let me know if theres any confusing parts.
[[Updating devkit to lat...
Jonathan Cormier

08/06/2014

02:37 PM Software Development: DSP HelloWorld Compile with gcc 4.3.3
I've recently completed the ARM HelloWorld example via the Starter Guide Wiki page and need help with the DSP HelloWo... Doug Browning

08/05/2014

09:30 AM Software Development: RE: How to enable PRU Subsystem on MityDSP-L138F SOM ???
Patches have been merged into linux-mityarm-v3.2 branch. Jonathan Cormier
09:16 AM Software Development: RE: I2C 0x8 Address
Cleaned up and merged changes into mitydsp-linux-v3.2 branch.
http://support.criticallink.com/gitweb/?p=linux-davi...
Jonathan Cormier

08/04/2014

07:53 AM Software Development: RE: I2C 0x8 Address
Yes, works fine now. Thanks Jonathan.
Mostafa Afgani

08/01/2014

01:47 PM Software Development: RE: I2C 0x8 Address
I see now. Odd that i'm not encountering this lockup.
I moved the other cpufreq_notify and pushed it to the branch...
Jonathan Cormier
11:16 AM Software Development: RE: I2C 0x8 Address
Yes, that only works when moving to a higher frequency because the voltage adjustments are made before the call to cp... Mostafa Afgani
11:12 AM Software Development: RE: I2C 0x8 Address
And thats why i moved the cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); to below that line as seen in your di... Jonathan Cormier
11:10 AM Software Development: RE: I2C 0x8 Address
Really don't know why we're seeing different things. I checked out both 'mitydsp-linux-v3.2' and 'mitydsp-linux-v3.2_... Mostafa Afgani
09:01 AM Software Development: RE: I2C 0x8 Address
I'm not seeing this hang with or without i2c-2 enabled. Jonathan Cormier
08:53 AM Software Development: RE: I2C 0x8 Address
Yes, v3.2_i2c_wip checked out and compiled as-is. Mostafa Afgani
08:32 AM Software Development: RE: I2C 0x8 Address
Are you saying you run into the hang when only i2c-1 is enabled? Jonathan Cormier

07/31/2014

03:36 PM Software Development: RE: Start Guide : Cannot build helloworld application with eclipse
Instructions for flashing a new filesystem can be found here:
https://support.criticallink.com/redmine/projects/arm9...
Jonathan Cormier
11:57 AM Software Development: RE: Start Guide : Cannot build helloworld application with eclipse
After using the older toolchain v4.3.3 and existing ARM filesystem, I was able to get the HelloWorld executable to ru... Doug Browning
12:24 PM Software Development: RE: I2C 0x8 Address
I've just tried the latest mitydsp-linux-v3.2 from git (without the i2c patches) and that works fine. Mostafa Afgani
11:04 AM Software Development: RE: I2C 0x8 Address
Just for clarification, I had reverted all changes to the branch (enabling i2c-2) so 'git status' shows no local modi... Mostafa Afgani
10:41 AM Software Development: RE: I2C 0x8 Address
Yes, it is:... Mostafa Afgani
10:07 AM Software Development: RE: I2C 0x8 Address
Just to verify this was with the newer mitydsp-linux-v3.2_i2c_wip branch? Jonathan Cormier
09:55 AM Software Development: RE: I2C 0x8 Address
That's really strange. The only modifications I made were to baseboard-industrialio.c in order to enable i2c-2:
<p...
Mostafa Afgani
08:24 AM Software Development: RE: I2C 0x8 Address
I tried your steps on the mitydsp-linux-v3.2_i2c_wip with i2c-2 enabled but didn't encounter a hang. Jonathan Cormier

07/30/2014

01:33 PM Software Development: RE: Start Guide : Cannot build helloworld application with eclipse
> root@mityomapl138:/var/volatile/tmp# ./HelloWorldCC
> ./HelloWorldCC: /usr/lib/libstdc++.so.6: version `CXXABI_ARM...
Jonathan Cormier
12:48 PM Software Development: RE: Start Guide : Cannot build helloworld application with eclipse
Jonathan,
Thanks for the reply.
Yes, I’ve followed the Starter Guide. Spent most of last week working through it....
Doug Browning
08:18 AM Software Development: RE: I2C 0x8 Address
Hi Jonathan, thanks for the testing branch. As our code is still based around the old 2.6.34-rc1 release, it will be ... Mostafa Afgani

07/29/2014

02:25 PM Software Development: RE: I2C 0x8 Address
I've created a test branch with my patches for this problem. Could you verify it works for you? Note that branch wo... Jonathan Cormier
10:24 AM Software Development: RE: I2C 0x8 Address
Okay I have submitted a bug report to the linux davinci mailing list using some of your procedures and stack trace. ... Jonathan Cormier
10:12 AM Software Development: RE: I2C 0x8 Address
Thanks Jonathan, I can confirm that the workaround allows the CPU frequency scaling to work with I2C1 enabled (but no... Mostafa Afgani
09:56 AM Software Development: RE: I2C 0x8 Address
It appears that the wait_for_completion is the wrong type of synchronization as it currently will always be true as l... Jonathan Cormier
08:56 AM Software Development: RE: I2C 0x8 Address
The transition function looks like following. The wait_for_completion call then calls wait_for_common which can be s... Jonathan Cormier
08:50 AM Software Development: RE: I2C 0x8 Address
I can confirm. Made the following changes to the 3.2 kernel and tried changing the frequency. It locks up if you do... Jonathan Cormier
08:33 AM Software Development: RE: I2C 0x8 Address
Hi Mike,
??To confirm, you don't see this issue with I2C1 not enabled in you kernel (the "stock" dev kit kernel), ...
Mostafa Afgani
07:42 AM Software Development: RE: I2C 0x8 Address
Ok, you didn't mention you are trying to adjust the CPU speed (or I missed it) as your I2C0 access method. That's no... Michael Williamson
05:44 AM Software Development: RE: I2C 0x8 Address
Hi Mike, actually our experience is the opposite:
1. Enable I2C1, flash the new kernel and reboot
2. Immediately ...
Mostafa Afgani
09:09 AM Software Development: RE: Start Guide : Cannot build helloworld application with eclipse
Have you followed the instructions located on the wiki? https://support.criticallink.com/redmine/projects/arm9-platf... Jonathan Cormier

07/28/2014

03:13 PM Software Development: RE: Start Guide : Cannot build helloworld application with eclipse
I'm working through the Starter Guide for the MityDSP-L138 configured with
- VirtualBox 4.3.0 (could not get Mity...
Doug Browning
11:55 AM Software Development: RE: I2C 0x8 Address
Looks like the kernel is configuring the OMAP-L138 I2C slave address as 0x08 (by default, it is 0x00 - illegal - in t... Michael Williamson
11:33 AM Software Development: RE: I2C 0x8 Address
No worries. I don't think i2c-detect does anything strange with this address. By looking at the code, I don't see any... Angelos Spanos
11:29 AM Software Development: RE: I2C 0x8 Address
We're looking at it now. I think that the i2c-tools may be emulating SMBus and trying to run the arbitration scheme ... Michael Williamson
10:49 AM Software Development: RE: I2C 0x8 Address
Source : System Management Bus (SMBus) Specification Version 2.0 August 3, 2000 :Appendix C – SMBus device address as... Angelos Spanos
10:20 AM Software Development: RE: I2C 0x8 Address
OK. So is it a defect on the MityDSP-L138F board, or is it the address of the OMAP I2C bus? Angelos Spanos
09:54 AM Software Development: RE: I2C 0x8 Address
Also on a devkit where the dvi chip was removed the 0x08 address still appears.... Jonathan Cormier
09:52 AM Software Development: RE: I2C 0x8 Address
Well at the least I can identify the others. 0x38 is the dvi chip, 0x48 is the pmic, and 0x50-58 is the eeprom. Whe... Jonathan Cormier
09:31 AM Software Development: RE: I2C 0x8 Address
We use a custom baseboard, but the address 0x8 is at the the industrial IO development kit as well:
root@PureVLC:~...
Angelos Spanos
08:06 AM Software Development: RE: I2C 0x8 Address
Did you set the pin-mux settings for the I2C1 lines on the second device in the kernel as well? For the devkit baseb... Michael Williamson
07:59 AM Software Development: RE: I2C 0x8 Address
The problem is that if we enable both I2C interfaces by changing the linux source code by adding the following lines ... Angelos Spanos
07:55 AM Software Development: RE: I2C 0x8 Address
What are you using for your baseboard? Michael Williamson
07:46 AM Software Development: RE: I2C 0x8 Address
I am using MityDSP-L138F board. Angelos Spanos
07:44 AM Software Development: I2C 0x8 Address
Hi All,
When I run i2cdetect -y 1 I get the following output:
0 1 2 3 4 5 6 7 8 9 a b c d e ...
Angelos Spanos
 

Also available in: Atom

Go to top
Add picture from clipboard (Maximum size: 1 GB)