Access data from webpage? - MCSDK Image processing demo

can you give some more info. I am not sure whihc page are you talking. Are you refering to HUA demo that comes with the EVM(assuming it C667x EVM)?

Thanks,

Arun.

Hi Arun,
Thanks for the quick reply. 
I was referring to Image processing demo. I want to know how the image (*.bmp)  is loaded into the socket. I wanted to know which part in that project points to it.

We have a demonstration guide for image processing. the link is below.

http://processors.wiki.ti.com/index.php/MCSDK_Image_Processing_Demonstration_Guide

Please let me know if this helps. If you need additional information on this please let me know and i will try to add the info in the page.

Thanks,

Arun.

The function serve_result_page() (from mcsdk_2_00_04_16\demos\image_processing\ipc\master\src) is called back from NDK when it receives the HTML message with image data, and it have the socket information. Then the post message is read from socket in function cgiParseMulti(), and parsed for further processing.

Regards

Sajesh

thank you all. Your reply was informative. But we have some more doubts. 

cgiparsemulti()  returns input image length. But for processing image, its width and height parameters are required. how is that obtained.

which function is invoked when we type the IP address in the  browser .

which event is invoked when process.cgi is hit in the input web page

thanks in advance

Sohal

And also I want to know that how can I get this image data into the 4GB SDRAM/DDR3 from the socket rather than going into the buffer.


Regards

Sohal 

Dear Sajesh,
Thanks for the detailed explanation.

Can DDR3 be accessed by 1 master and 7 slaves simultaneously?
If so, how? 

Sohal,

All processors can access DDR3 memory simultaneously. In the demo all 8 cores access DDR3 memory simultaneously. The DDR3 start address for all cores is 0x8000 0000. So all cores can use this address to read and write data.

In the demo, all 8 cores use DDR3 memory simultaneously.

Regards

Sajesh

Sajesh,
Can you just point out to me which part in the code tells about storing the image onto the DDR3. i want to know exactly which function deals with it. How to take the data from the socket to the 4GB external memory. Please shower some light on that. 

Also I want to know

• if I have to upload a raw file of more than 500 MB size, how will I do that?

The function call len = recv( htmlSock, pBuf, ContentLength, MSG_WAITALL ); from mcsdk_2_00_04_16\demos\image_processing\ipc\master\src\mcip_webpage_utils.c reads the post message which have the image. The *pBuf points to a memory in DDR3. The memory is allocated in serve_result_page() function.

You can use NDK to transfer the data to device memory. Please see the NDK users guide for details.

Regards

Sajesh

Hi sajesh,

That was what I was looking for. Now got some more doubts:

I f the data in DDR3 is large say more than 500 MB and if each of the cores is accessing it and processing it simultaneously it might get slow right?

• What is the bandwidth of the channel?
  If we move the data to Shared memory the processing speed might increase also i guesss. 
• But How can we move this large file to Shared memory. 
• Can shared memory accommodate this big a file? 
  
  
  
• Also how can we upload a large file to DDR3 since its going through socket it have to be read in chunks right? How to do that? 

Hello

         Me to dealing with same example project. My task is need to send the "hello.txt " from index.html then i need to open the hello.txt at core side then i need to edit the .txt file then need to send back to browser. 

I've the following questions

1. How to get the hello.txt at core side. which function have the socket data and how to get it for my processing?

2. Does the PHP file convert the hello.txt to hexformat?, if its how to handle this?