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From 09/26/2011 to 10/25/2011

10/25/2011

07:32 PM Software Development: RE: L138F UART2 in Linux
Hi Mike,
In the kernel in the arch/arm/mach-davinci area, you will find a bunch of calls for setting up the multip...
Michael Williamson
07:27 PM Software Development: L138F UART2 in Linux
Hi,
it looks like UART2 is enabled in the default linux kernel. When i do
>dmesg | grep tty
3 uarts are sho...
Mike Costa
05:39 PM PCB Development: RE: PROFIBUS Dev Kit RS485 on J504
One more question on this...
I'm confused on the pinout of J504. the schematic that you guys sent of the dev boar...
Mike Costa
04:23 PM PCB Development: RE: PROFIBUS Dev Kit RS485 on J504
Got it, thanks Tom Mike Costa
02:10 PM PCB Development: RE: PROFIBUS Dev Kit RS485 on J504
Hi Mike -
They are TTL and meant to ribbon cable to a small driver board that can be panel mounted to minimize st...
Thomas Catalino
02:01 PM PCB Development: PROFIBUS Dev Kit RS485 on J504
Hi,
The RS485 pins on J504 of the PROFIBUS Dev Kit seem to be directly connected to UART2 of the mitydspL138F whic...
Mike Costa
04:33 PM Software Development: Is there an Embedded Linux USB-Serial device driver in the kernel?
I have a L138F with profibus board and am looking into options for communicating with a PC. I'd like to use USB if p... Mike Costa
03:22 PM PCB Development: RE: mitydsp-L138F datasheet typo? MII_RXD or MII_DXD?
If you are not using all the UPP pins, you might be able to use RMII (routed through the FPGA) to free up these pins.... Michael Williamson
01:57 PM PCB Development: RE: mitydsp-L138F datasheet typo? MII_RXD or MII_DXD?
Hi Mike, thanks for the verify, and pointing out that those pins are used for the Ethernet control. I do need ether... Mike Costa
12:39 PM PCB Development: RE: mitydsp-L138F datasheet typo? MII_RXD or MII_DXD?
Hi Mike,
You are correct, there is a typo in the datasheet. We'll update the sheet, thanks for pointing it out. ...
Michael Williamson
11:04 AM PCB Development: mitydsp-L138F datasheet typo? MII_RXD or MII_DXD?
Hi, I am confused with the terminology used in the mitydsp-l138f datasheet (july 12 2011)
Pins 79, 81, & 83 are la...
Mike Costa
12:47 PM FPGA Development: RE: FPGA part number
XC6SLX45-2CSG324C
-Mike
Michael Williamson
12:33 PM PCB Development: RE: uPP Test Points
Unfortunately, no. There are no easily available vias for these signals. Michael Williamson
12:31 PM Software Development: RE: jffs2 check
Hi Thomas,
Sorry for the delay. If you wanted to verify the NAND write (and you have enough memory), I believe yo...
Michael Williamson
09:07 AM Software Development: RE: uPP receive problem
Mike,
Thanks for looking at the snippets of code I sent you. I have set the enable bit in my driver. I didn't se...
Scott Whitney
08:23 AM Software Development: RE: uPP receive problem
Hi Scott,
Sorry for the delay. You are using the receive channel *much* differently than we typically do (we use ...
Michael Williamson

10/24/2011

04:06 PM Software Development: RE: RS-485 failure to operate
Hi Mark,
My initial inclination would be to make sure that the pinmux is set correctly. Section 11.5.10 in the OMA...
Gregory Gluszek
03:19 PM Software Development: RS-485 failure to operate
Using a MityDSP L178 with industrial IO board 80-000268RI-2
Trying to use RS-485 via J504 - there are no signs of l...
Mark Lyon

10/21/2011

02:34 PM Software Development: RE: uPP receive problem
Mike,
I will attach the upp control settings and dma descriptor settings. I know in the end I want to use the ena...
Scott Whitney

10/20/2011

05:47 PM Software Development: RE: uPP receive problem
On the MityDSP-L138F, the voltage domain for the UPP (and for the FPGA bank connected to the UPP) is 1.8 Volts.
I'...
Michael Williamson
04:56 PM Software Development: RE: uPP receive problem
Tom,
I understand the handshaking can be a problem. I have the uPP running with the highest divisor now at ~4.68 ...
Scott Whitney
01:23 PM Software Development: RE: uPP receive problem
Hi Scott -
Thanks for posting.
I talked to the guys about this problem that you're having. It sounds like any...
Thomas Catalino
11:48 AM Software Development: uPP receive problem
Hello,
I am writing a linux uPP driver for bi-directional comms between the fpga and OMAP. From what I can tell t...
Scott Whitney
03:11 PM Software Development: RE: Using dspQDMA library on OMAP-L138
Great! Thanks very much guys. This should get me on the right track. Rich Bagdazian
12:41 PM Software Development: RE: Using dspQDMA library on OMAP-L138
Mike and I apparently were typing simultaneously! Good thing we both came up with the same answer!
Dave
David Rice
12:40 PM Software Development: RE: Using dspQDMA library on OMAP-L138
Typically, we kick off the DMA from an ISR and pend for it in a task. Pending from within an ISR is not allowed. You... David Rice
12:35 PM Software Development: RE: Using dspQDMA library on OMAP-L138
If you are calling SEM_pend() from within an ISR, you need to use a zero timeout. You could do a ... Michael Williamson
12:16 PM Software Development: RE: Using dspQDMA library on OMAP-L138
If I did want to be sure that the operation had completed before moving on, is there an alternative approach. In this... Rich Bagdazian
12:15 PM Software Development: RE: Using dspQDMA library on OMAP-L138
Hi Mike,
I will check on the initialization value. I was calling the SEM_pend function immediately after requesting ...
Rich Bagdazian

10/19/2011

12:38 PM Software Development: RE: Using dspQDMA library on OMAP-L138
Hi Richard,
How are you creating the Semaphore? Zero initialization value?
Is it possible your routine that is...
Michael Williamson
12:28 PM Software Development: Using dspQDMA library on OMAP-L138
I am using the dspQDMA class in a project on the mity-omap processor. I was able to successfully load all of the comp... Rich Bagdazian

10/12/2011

04:01 PM Software Development: RE: HelloWorldDSP.out syntax error
Hi Peter,
Thank you for your feedback. We'll try to update the Hello World page and address your comments. The c...
Michael Williamson
03:19 PM Software Development: Reflections after building DSP "Hello, world!"
I managed to compile the DSP Hello World...*finally*.
(Using Version: 4.2.4.00033 of CCS on WinXP)
I noticed a ...
Peter Simpson
01:29 PM FPGA Development: uPP routing
Hello,
We are trying to debug a uPP application and routed the chan A and Chan B signals through the fpga to conne...
Scott Whitney

10/10/2011

03:36 PM Software Development: RE: HelloWorldDSP.out syntax error
those binaries were a great sanity check for me. you guys might consider posting them to the quick start page.
Mike
Mike Costa

10/06/2011

04:04 PM Software Development: jffs2 check
Hi,
After transferring the jffs2 filesystem via uBoot, using the "nand write.jffs2 C2000000 0 <>" command, is there...
Thomas Nagel

10/03/2011

03:48 PM Software Development: RE: uPP digital loopback
Greg,
I'm using the default ASYNCH3 clock which is PLL_SYSCLK1 I think. This should be divided down automatically...
Scott Whitney
01:49 PM Software Development: RE: uPP digital loopback
Hi Scott,
As far as I know we have not seen any issue like what you're describing when using a uPP clock driven by...
Gregory Gluszek
09:34 AM Software Development: uPP digital loopback
Hello,
I have a linux driver module to test the uPP in digital loopback. I saw some odd behavior in regards to th...
Scott Whitney

09/30/2011

06:30 AM Software Development: RE: Additional serial port on the MityDSP Profibus dev-kit
Just thought I'd add a note in case some one else stumbles upon this thread:
Ended up using a Prolific usb-to-seri...
Mattias Ekstrom

09/29/2011

04:36 PM PCB Development: uPP Test Points
Are there test points available on the MityDSP-L138F for the following uPP signals?
'UPP_CHA_ENABLE' = L138 Pin#U1...
Brian Tomaselli
10:40 AM Software Development: RE: upp clock
Greg,
Thanks for the reply. My question was more of how the clocks are setup on the board as a default. I suspec...
Scott Whitney
08:30 AM Software Development: RE: Additional serial port on the MityDSP Profibus dev-kit
No, I don't think ssh would work. It has to be something I could open and interact with just like a com port from my ... Mattias Ekstrom
08:18 AM Software Development: RE: Additional serial port on the MityDSP Profibus dev-kit
(re: comm over ethernet)
Is ssh acceptable? "ssh root@mitydspaddr"
-Mike
Michael Williamson
08:17 AM Software Development: RE: Additional serial port on the MityDSP Profibus dev-kit
The default kernel and root filesystem may "just work". If you plug in the device you should see some messages about... Michael Williamson
08:13 AM Software Development: RE: Additional serial port on the MityDSP Profibus dev-kit
Hmm, I don't really need a physical port. Is there any com over ethernet software availible for these systems?
/ M...
Mattias Ekstrom
08:10 AM Software Development: RE: Additional serial port on the MityDSP Profibus dev-kit
Thanks for the speedy reply!
One extra port should suffice. I'll order one of the keyspan adapters right away.
...
Mattias Ekstrom
07:49 AM Software Development: RE: Additional serial port on the MityDSP Profibus dev-kit
Hi Mattias,
I think that your best (or easiest) bet would be to use a usb-to-serial adapter on the Host (USB1) por...
Michael Williamson
06:06 AM Software Development: Additional serial port on the MityDSP Profibus dev-kit
Hi, I'm wondering what the best way to get an additional serial port is? Is there support for usb-to-serial adapters?... Mattias Ekstrom

09/28/2011

04:35 PM Software Development: RE: upp clock
Hi Scott,
The fastest you will be able to get the uPP transmit clock to run with your setup is 75 MHz.
From th...
Gregory Gluszek

09/27/2011

05:04 PM Software Development: upp clock
I have a userspace upp driver that I am trying to test in loopback mode. I am trying to loopback 1 line of a memory ... Scott Whitney
 

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