question about the System_linkControl

tianxing hou

Expert 2435 points

Hi, I have a question about the System_linkControl().

Now, I create my link as follow:

capture --> framesOut(m3vpss) --> (processLink) framesIn(dsp) --> alg

--> (nextLink) framesIn(A8)

I run my algorithm on dsp, and if it have result I would send a message to A8 by System_linkControl.

On dsp side, the message as follow:

lineNo is 2, illeageType is 1, plateNum is 湘BF9481, color is 1, frameIdx is 0x11e6, 0x125a, 0x1376

On A8 side, I can receive the message, however the content of message as blow lost, I print the message, as follow:

The result as follow:
0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 ......

I thought it maybe a problem of cache, could I flush cache on A8 side, could you give me some advices?

Thanks,

Tianxing

over 11 years ago

0 Badri Narayanan over 11 years ago

TI__Guru 59700 points

This cannot be problem of cache since the link control cmds are allocated from SR0 which is not cached on any core.

Pls share the portion of code which is creating and sending linkControl cmd and the portion of code receiving the link control cmd.

0 tianxing hou over 11 years ago in reply to Badri Narayanan

Expert 2435 points

Hi, Badri

Thanks your reply, I have resolve the problem.

I didn't describe detailed, I carry the message after the Frame data, so I must write back cache on DSP side. Linkcontrol only noticed the A8.

Regards,

Tianxing

0 Eve over 11 years ago in reply to tianxing hou

Prodigy 190 points

I am also using SYSTEM_LINKCONTROL to pass the output come out by ALG runing on DSP, and i write a post at http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/328669/1150435.aspx#1150435

could you help me solve the problem? thanks!

0 tianxing hou over 11 years ago in reply to Eve

Expert 2435 points

Hi, Eve

Could you receive the event on A8 side?

I create my link as follow:

Capture-->FramesOut(M3Vpss) processLink-->FramesIn(Dsp)-->AlgLink

nextLink -->FramesIn(Host)

As you see, the process link of m3vpss's framesout link is dsp's framesout link, and its nextlink is a8's framesin link.

If I have a result on dsp alg link, I would send a message to a8's framesin link through System_linkcontrol Api.

0 Badri Narayanan over 11 years ago in reply to tianxing hou

TI__Guru 59700 points

AlgLink by defalt only supports ipcBits as next link. Have you modified it to support ipcFrames as nextLink ?

Processors

Processors forum

question about the System_linkControl