Activity
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... - Hi,
it looks like UART2 is enabled in the default linux kernel. When i do
>dmesg | grep tty
3 uarts are sho... - 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... - 04:23 PM PCB Development: RE: PROFIBUS Dev Kit RS485 on J504
- Got it, thanks Tom
- 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... - Hi,
The RS485 pins on J504 of the PROFIBUS Dev Kit seem to be directly connected to UART2 of the mitydspL138F whic... - 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...
- 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....
- 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...
- 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. ... - Hi, I am confused with the terminology used in the mitydsp-l138f datasheet (july 12 2011)
Pins 79, 81, & 83 are la... - 12:47 PM FPGA Development: RE: FPGA part number
- XC6SLX45-2CSG324C
-Mike
- 12:33 PM PCB Development: RE: uPP Test Points
- Unfortunately, no. There are no easily available vias for these signals.
- 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... - 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... - 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 ...
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... - Using a MityDSP L178 with industrial IO board 80-000268RI-2
Trying to use RS-485 via J504 - there are no signs of l...
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...
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'... - 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 ... - 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... - Hello,
I am writing a linux uPP driver for bi-directional comms between the fpga and OMAP. From what I can tell t... - 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.
- 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
- 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...
- 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 ...
- 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...
- 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 ...
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... - I am using the dspQDMA class in a project on the mity-omap processor. I was able to successfully load all of the comp...
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... - 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 ... - Hello,
We are trying to debug a uPP application and routed the chan A and Chan B signals through the fpga to conne...
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
10/06/2011
- Hi,
After transferring the jffs2 filesystem via uBoot, using the "nand write.jffs2 C2000000 0 <>" command, is there...
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... - 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... - Hello,
I have a linux driver module to test the uPP in digital loopback. I saw some odd behavior in regards to th...
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...
09/29/2011
- Are there test points available on the MityDSP-L138F for the following uPP signals?
'UPP_CHA_ENABLE' = L138 Pin#U1... - 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... - 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 ...
- 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
- 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...
- 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... - 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.
... - 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... - Hi, I'm wondering what the best way to get an additional serial port is? Is there support for usb-to-serial adapters?...
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...
09/27/2011
- 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 ...
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