DSP Support Forum : Thread List - Blackfin Processors

Device serial number

analog@sgaur.hosted.jivesoftware.com — Fri, 20 Nov 2009 17:58:29 GMT

Is it possible to access the device serial number or any identifier unique to the device?

Thanks

system services dma callback

analog@sgaur.hosted.jivesoftware.com — Wed, 23 Sep 2009 07:02:37 GMT

hello,

I am using the system services and driver model to write a driver for the AD5663 DAC. I am building it upon the ADI sport driver with DMA using a two dimensional "ping pong" buffer. The idea is to fill one subbuffer, while the DMA transfere the other. This works fine, but I see a potensial problem in the way I get DMA events in my interrupt callback. The only event i get is the ADI_DEV_EVENT_SUB_BUFFER_PROCESSED. I never see the ADI_DEV_EVENT_BUFFER_PROCESSED. I had hoped to be able to determine which subbuffer the DMA had completed this way. My next approch was to use the pointer to the buffer received in the callback, but this pointer allways points to the start of the whole buffer, so there is no indication of what buffer that is actually processed. By examining system services source (adi_dma.c) I see the the following statements which I belive confirms my observation:

// CASE (circular)
case ADI_DMA_MODE_CIRCULAR:

            // determine if it's an inner loop interrupt or an outer loop interrupt
            if (pChannel->Config->b_DI_SEL == ADI_DMA_DI_SEL_OUTER_LOOP) {
                Event = ADI_DMA_EVENT_OUTER_LOOP_PROCESSED;
            } else {
                Event = ADI_DMA_EVENT_INNER_LOOP_PROCESSED;
            }

            // override the pArg callback parameter to be the buffer start address
            pArg = pChannel->StartAddr;
            break;

Should i use another DMA model in my case? Is there a way to be absolutely sure that my program is syncronized to the DMA buffer handling? When I stop the transfere, will the DMA be re-initialised to start with a clean buffer structure or may it start in the subbuffer?

mads-l

optimized goertzel algo for Blackfins

analog@sgaur.hosted.jivesoftware.com — Fri, 14 Aug 2009 06:17:28 GMT

hi !

is there any optimized code for a goertzel algorithm which is usable for blackfins?

regards chris

Bootloading Blackfin BF537 with VisualDSP

analog@sgaur.hosted.jivesoftware.com — Thu, 19 Nov 2009 16:15:39 GMT

Hi!

I'm starting to work with DSPs. I have a EZ-KIT with the BF537 on it. I can debug it using the integrated tools, no problem. My problem is, that I should use the Bootloader to get the code on it. I tried to change the preferences of the Project, but I have problems to bootload the code.

Can anyone give me some hints how to do it? Everytime I click on "Load" he want's to connect zu the integrated flash loader, and does not use the UART bootloader. What am I doing wrong?

Sorry for my bad english and many thanks for help.

Regards,

Andi

BF518F Kit Lite Related

analog@sgaur.hosted.jivesoftware.com — Wed, 18 Nov 2009 11:58:52 GMT

Can the Blackfin Landscape EZ Extender be used with BF518 Kit Lite also. In the information related to LCD extender, its been mentioned as

Blackfin Landscape LCD EZ-Extender for the ADSP-BF526, ADSP-BF537, ADSP-BF538, and ADSP-BF548 EZ-KIT Lites.

But in the Blackfin evaluation kits page, Blackfin Landscape LCD EZ-Extender is mentioned under BF518 also. Please clarify.

TDM Mode Sport Connection

analog@sgaur.hosted.jivesoftware.com — Fri, 20 Nov 2009 12:48:03 GMT

Hi,

I have few question regarding the SPORT TDM mode of operation.

1. How the sport signal pins needs to be connected for TDM operation?

2.Whether the external pin sport connectivity is same for different TDM modes(Transmit only, Receive only, Both transmit and receive)?

3. Suppose we connected one sport in TDM mode, Is it possible to opearte the Transmit and receive channels seperatly?

4. Is there any EE note availble?

5. whether the connectivity is same for both MAster and Slave mode of DSP?

VDK History view

analog@sgaur.hosted.jivesoftware.com — Thu, 19 Nov 2009 12:40:47 GMT

Hi,

I've a problem with one thread in my VDK application. After thread ends my app become instable.

If I take a look in the VDK history I found an event called "Max Stack Used".

What is ist? The Threads StackSize is big enough...

any ideas?

Thanks

BlackFin 2D Graphics Lib

analog@sgaur.hosted.jivesoftware.com — Thu, 12 Nov 2009 08:50:12 GMT

HI ADI-Support,

I would like to use the BlackFin 2D Lib in combination with a BF561. In my application I am using an LCD connected via RGB 565 on the PPI interface.

I have two questions now:

1. The lib needs a pointer to ARGB to RGB888 conversion routine. Is it also possible to use adapt this function and provide an ARGB to RGB565 conversion instead.

2. The libadi_graphics2d.dlb is about 2.4 MByte. Is this the true size of the production lib or does there a smaller lib exists?

Thanks in advance for help!

Best regards

Thomas

Does BF51x RSI interface need pull-up resistances and ESD protected components?

tony.lxy@gmail.com — Fri, 20 Nov 2009 07:37:43 GMT

Q1:I want to using BF514 drive a SD Card by RSI interface. For a stable system, Does BF51x RSI interface need pull-up resistances?

Q2:As you know, SD card is a removable storage device. In real world electrostatic destory is common. Does RSI interface support a protect abiltiy for 8KV static ?

Thanks!

what type of FFT is suited for my application

analog@sgaur.hosted.jivesoftware.com — Fri, 20 Nov 2009 03:06:46 GMT

Hello guys.

i'm very new at using the blackfin processor, specifically the ADSP-BF537.

for my implementation, i will have take the fft of a signal coming from an electric guitar,

are there any sample fft programs that are similar to this type of application?

and what fft is best suited for this?

thanks in advance

Start to Use the BF561 Survillance kit by Avnet

analog@sgaur.hosted.jivesoftware.com — Sun, 15 Nov 2009 16:22:25 GMT

Hi.

Im beggining to use the survillance kit for BF561 from Avnet with a Micron Camera Sensor MT9D131 and I have the line_processing example but I cant see any image on the image viewer at the DSP++5.0. Does somebody is using these Avnet kit to image processing ? and can exchange some tips or knowledges on how can I use the kit to see the images, take pictures, film and recognize objetcs with these kit ?

Thank you.