Problems about PA_emacExample_exampleProject

Nuoxi Lin

There are two C6678 DSPs on my board . I am trying to implement C6678_A sending data to C6678_B through ethernet interface.

I consulted an example project located at pdk_C6678_1_0_0_21\packages\ti \ drv \ exampleprojects\ PA_emacExample_exampleProject.

Here are my questions.

1. In the example project, when the function Sendpacket() is executed, interrupt service handler(ISR)named Cpsw_RxISR() is called automatically.

How is this achieved?

I reffered to the .cfg file but found nothing.

2. In my case,When the C6678_A finishes executing the function SendPacket() , it should send an interrupt to C6678_B. Then C6678_B start call the

Cpsw_RxISR() automatilly. To achieve this, how to modify the codes?

3. Is there any document helping user to familiar with .cfg file?Every time I look up the .cfg file , i can get little information.

Supplement : C6678_A and C6678_B runs different projects. C6678_A does initialization and send data only . C6678_B does initialization and receive

data only. Both the projects are based on PA_emacExample_exampleProject.

Both SendPacket() and Cpsw_RxISR() are located at cppi_qmss_mgmt.c.

I hope someone coule help me . Thank you in advance.

over 13 years ago

0 Uday over 13 years ago

TI__Expert 4920 points

Nuoxi,

1. This ISR setup is done in cppi_qmss_mgmt.c, in the function Setup_Rx (Void), in the following lines of code:

EventCombiner_dispatchPlug (eventId, (EventCombiner_FuncPtr)Cpsw_RxISR, (UArg)NULL, TRUE);
Hwi_eventMap(vectId, 1);
Hwi_enableInterrupt(vectId);

You'll notice that the variable eventId, is event 48, and vectId is interrupt vector 7. The 6678 data manual, section 7.9.1, table 7-38 provides the event numbers and mapping. Data manual is at http://www.ti.com/lit/ds/sprs691c/sprs691c.pdf

Also note that the csw_example.cfg file includes the BIOS EventCombiner module. You can read more about EventCombiner, by going to CCS and in the Help menu select Help Contents, and then search for "EventCombiner."

2. I believe this example is setup only for a singlecore implementation. I was searching the forum and came across your earlier post on this matter http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/194765/700954.aspx#700954 It might be best to reply to that thread with the debug info requested so Varada can follow up with the expert she was consulting with on the matter.

3. For details on RTSC configuration files (.cfg) you can look at http://rtsc.eclipse.org/docs-tip/Glossary#ConfigurationScript and http://rtsc.eclipse.org/docs-tip/XGCONF_User%27s_Guide

0 Nuoxi Lin over 13 years ago in reply to Uday

Intellectual 650 points

Hi Gurnani,

Thanks for your help.

Gurnani said:
I believe this example is setup only for a singlecore implementation.

You mean I can't implement two DSP's communication using this example?

Then which example should i reffer to ?

Best Regards,

Nuoxi

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Problems about PA_emacExample_exampleProject