Honored ContributorHello,
I have to present what exactly do all of implementation of Prewitt edge detection design in Dsp-Builder. I find informations in "Edge Detection Using SOPC Builder and DSP Builder Tool Flow" but it is not enough. Know someone where I can find more informations ? Thanks. *sorry for my English
Honored ContributorGoogle contains lots of info.
Honored Contributorwell I did search for some information regarding the same. The literature shows a model of the edge detection with sopc builder and just goes straight to a different side. I have not understood how the black box was added to the model of edge detection which is a reference design.
Honored ContributorI converted the codes from Simulink to HDL. The codes which are generated seems to be quite different. I have a file .mdl and .mdlxml generated along with the other built in function using by DSP builder. I did also see an interface, entity and architecture description file.
My query is, is it possible to add additional components directly to the code here and compile it. Well I did add some output ports onto the same code and tried building it, but I dont see them under the pins. I am not sure why.Honored ContributorHi pals,
I'm working in a project based in prewitt edge detector. I'll comment some aspect from this example. 1.- Edge detector has been implemented using a kernel structure by using line buffers. This structure is a datapath, and the whole incoming image is passed throught this kernel. 2.- DSP builder generates .vhd files to be called from SOPC Builder in order to integrate to your system 3.- Your system communicates with this block by using avalon FIFO ports (DMA), first you'll need to writing image bytes to the input port and reading image bytes from the ouput ports to getting the image processed. 4.- DMA is configured by using HAL API functions from NIOS II processor I hope this helps you!!!Honored Contributorthats great....
well I did get some of these things from the paper too... but then when I try implementing it on kit.. I always get stuck... I find it really difficult getting to work with the DMA... can u suggest me on how to proceed.....Honored ContributorI'll recommend to you to see the section called "Developing Programs Using the Hardware abstraction Layer" in the "NIOS II software developer's handbook.
for work with DMA you'll need to use the functions within sys/alt_dma.h. It shouldn't be very complex to do this Which hardware are you using???Honored ContributorI am using a Altera DE2 development kit...
I will try going through the book.... actually I have been working on this for a while and still havnt got anywhere close to implementing it...Honored ContributorHonored Contributorh abinabin2,
I've developped my own algorithm based on the DSP builder edge detector. This algorithm includes imaging morphological operators based on the kernels structures by using line buffers as in the edge prewitt detector example. I don't exactly know what is your problemHonored Contributorwell I had got some replies from mysupport (Altera) where initially they asked me to go through one application note based on real time edge detection and so I tried working it out the same way as mentioned. But when I get to the part where I have to add the NIOS component, I am not able to even get it working using the SOPC builder. I am totally new into this field of softcore processors and so struggling at this stage.
I did get the component in HDL format from Simulink but have no clues how it is gonna work. What do u advise.. is it better to write the algorithm directly in HDL or get it from Simulink. Ur experience on this project should help me some insight on some of the problems that you also might have faced when u were working with this project. Do pass on ur comments, it will be of great value for me. Regards, Abin
