CCS/CCSTUDIO: CSL import on a DSP-BIOS project

Stefano Carlesi

Expert 1325 points

Part Number: CCSTUDIO

Tool/software: Code Composer Studio

Hi there,

I correctly tested the CSL USB CDC example and now I want to import that module on my project using DSP-Bios.

I can't let it work and the problem seems to be on the interrupt vector allocation.

if I comment the line "IRQ_setVecs((Uint32)(&VECSTART));" the dsp-bios works but the USB driver doesn't.

If I use the function IRQ_setVecs((Uint32)(&VECSTART)) the DSP-bios doesn' work.

I noticed that on the CSL example the vector location has a different address compared to the one defined by dsp-bios.

How can I use CSL with dsp-bios on this application?

Where can I find examples with CSL used on DSP -Bios?

I already used CSL UART on a dsp-bios project and there I have no problem!

Thank you

Stefano

over 8 years ago

0 ToddMullanix over 8 years ago

TI__Guru* 96960 points

What device are you using? BIOS manages the vector table so you need to create/plug the vectors via the HWI module.

Todd

0 Stefano Carlesi over 8 years ago in reply to ToddMullanix

Expert 1325 points

I'm using C5515. Could you explain more in detail what I should do?

Thank you
Stefano

0 Stefano Carlesi over 8 years ago in reply to ToddMullanix

Expert 1325 points

Some more details:

Running with: CCS5, c55_csl_3.04, C5515 EVM, DSP BIOS 5.41.11.38

I configured through HWI dsp bios module the USB interrupt as follow:

I then modified the csl_usb_cdc_example.c code commenting the vector table inizialization done by the CSL USB example:

/* Set the interrupt vector start address */
//IRQ_setVecs((Uint32)(&VECSTART));

/* Plug the USB Isr into vector table */
//config.funcAddr = &usb_isr;
//IRQ_plug(USB_EVENT, config.funcAddr);

/* Enable USB Interrupts */
IRQ_enable(USB_EVENT);
/* Enable CPU Interrupts */
IRQ_globalEnable();

The USB interrupt seems enabled:

but the the CSL module still get an error and the CDC_Open function gets an error ("CDC Open Failed\n");

// Set up USB configuration strucrure
usbConfig.opMode = CSL_USB_OPMODE_POLLED;
usbConfig.maxCurrent = CSL_USB_MAX_CURRENT;
usbConfig.appSuspendCallBack = (CSL_USB_APP_CALLBACK)CSL_suspendCallBack;
usbConfig.appWakeupCallBack = (CSL_USB_APP_CALLBACK)CSL_selfWakeupCallBack;
usbConfig.startTransferCallback = CSL_startTransferCallback;
usbConfig.completeTransferCallback = CSL_completeTransferCallback;

// Create a CDC handle
status = CDC_Open(&CDC_AppHandle, &usbConfig);
if(status != CSL_SOK)
{
if(status == CSL_ESYS_BADHANDLE)
{
CSL_USB_DEBUG_PRINT("Opening CDC Module Failed!\n");
CSL_USB_DEBUG_PRINT("CDC_Open Returned - BAD HANDLE\n");
} else
{
CSL_USB_DEBUG_PRINT("CDC Open Failed\n");
}

return(status);
}
else
{
CSL_USB_DEBUG_PRINT("CSL CDC Module Open Successful\n");
}

How am I supposed to configure and manage interrupts with DSP-Bios when I use CSL?

0 Robert Tivy over 8 years ago in reply to Stefano Carlesi

TI__Mastermind 18260 points

I think the main problem with what you've done so far is that the usb_isr() function is declared with the 'interrupt' keyword:

interrupt void usb_isr(void)

That keyword messes up the HWI dispatcher handling of the ISR and can't be used by an HWI-dispatched ISR.

The other thing that might cause problems is the IRQ_globalEnable() call. BIOS will globally enable interrupts at the appropriate time, which happens once main() returns.

So, please try removing the 'interrupt' keyword, and comment-out the IRQ_globalEnable() call.

There is a way to allow use of the 'interrupt' keyword on ISRs, which requires the ISR to *not* be dispatched by HWI, and requires a run-time HWI_plug() call instead of statically configuring HWI_INT20 in gconf. However, I would not recommend this method but will explain in more detail if you'd like to pursue it.

Regards,

- Rob

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CCS/CCSTUDIO: CSL import on a DSP-BIOS project