c6748 edma interrupt

Hi,

If you want to add ISR without OS/BIOS, it may not be trivial. For more information on EDMA3 interrupts, you can find under section 16.2.9 @ http://www.ti.com/lit/ug/spruh79a/spruh79a.pdf

Hi.

I already see that reference, and I know the way using EDMA register. (IPR, IER, DRAE.. etc)

but I have no idea about mapping ISR function with CPU interrupt, 

and I can't find CPU interrupt register address about IER, GIE.

I want to use EDMA3_0_CC0_INT1(EVT# 8) & ISR function, and I have intvecs.asm vector table file.

How can I solve this problem?

Thanks in advance.

Hi Sung,

Have you checked the chapter 7 of this doc?  http://www.ti.com/lit/ug/sprufk5a/sprufk5a.pdf

Meanwhile, can you share the intvecs.asm file? i will check at my end.

Hi.

I saw it, but there is no register information about IER, GIE.

I can make interrupt path from edma interrupt EVT 8 to CPU IFR using Interrupt Controller, 

but I cannot use IER, GIE after IFR.

It doesn't show the way how can use IER, GIE on SPRUFK51 interrupt controller 167 page.

In case of 6713 DSP, CSL use IRQ_enable & IRQ_globalEnable function for IER, GIE

and 6713dskinit.asm file supports it.

but I'm using 6748 and don't have 6748 asm file,

How can I solve it?

PS. C6748 starterware has intvecs.asm file.

Thanks.

Ok, I have downloaded the starterware. Will check and let you know.

I modified above my question in detail.

Thanks for your attention.

The asm file about interrupt vector in "C:\ti\C6748_StarterWare_1_20_03_03\system_config\c674x"

Hi Sung,

There is very good example in the starterware which implements inerrupts. You can check under

..\C6748_StarterWare_1_20_03_03\examples\evmC6748\edma\edmaTest.c

The corresponding interrupt APIs are implemented in C6748_StarterWare_1_20_03_03\system_config\c674x\interrupt.c

All these implemented with mere register settings, vector table.

Hi.

I already check it before I post this question.

Interrupt.c file has IntEnable (about IER) & IntGlobalEnable (about GIE) API function.

But I couldn't find the definition of _enable_interrupts() in IntGlobalEnable API function,

_disable_interrupts() in IntGlobalDisable API function.

Do you know where those functions are?

Also I have coded my project without API function, therefore I can't use them.

So I want to know IER, GIE register information and how can use them.

Hi Sung,

sung chul woo said:

But I couldn't find the definition of _enable_interrupts() in IntGlobalEnable API function,

_disable_interrupts() in IntGlobalDisable API function.

They are intrinsics for c674x as supported by the compiler. You can directly call them in your application.

I am inserting the text from the doc.

Looks like some problem with attachment.

Check section 7.5.8 in the doc, http://www.ti.com/lit/ug/spru187u/spru187u.pdf

Hi. Radhesh Bhat.

Thanks for your advice!

I'll try it and post again.

Best regards.

Hi. Radhesh Bhat.

I tried to code EDMA & CPU Interrupt, and I did make it.

But I have some problems about CPU IFR register.

I check my register, but IFR has always "0".

It doesn't change, also ISTP too.

But, EDMA ISR function & EDMA register work well.

I set cpu register below.

#define EVTSET0  *((volatile unsigned int *)(0x01800020))

#define INTMUX2  *((volatile unsigned int *)(0x01800108))

EVTSET0 |= (1 << 8); // EDMA TCC EVT 8 set
INTMUX2 |= (8 << 0);

ISTP = (unsigned int)(intcVectorTable);
ICR = (1 << 8); // EVT 8 clear
IER |= (1 << 1); // NMI enable
IER |= (1 << 8); // EVT 8 enable
CSR |= (1 << 0); // GIE enable

IER, CSR register have right values but IFR, ISTP doesn't.

How can I solve this problem?

regards,

woo.