RTOS/TMS320C6657: How to stop an EDMA3 memory to memory transfer?

SGQ

Part Number: TMS320C6657

Tool/software: TI-RTOS

Hi Steven Ji,

We are using EMIF16 to internal memory transfer with EDMA3. It's audio data packets.

Sometime, the transfer gets out of sync. To get back in sync, I need to stop last EDMA3 transfer. Then resubmit another transfer.

I use the following to start another transfer:

CSL_edma3HwChannelControl(EMIF16hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL);

Thank you.

Steve

over 5 years ago

0 Cvetolin Shulev-XID over 5 years ago

TI__Guru 65405 points

The team is notified. They will post their feedback directly here.

BR
Tsvetolin Shulev

0 SGQ over 5 years ago in reply to Cvetolin Shulev-XID

Expert 2875 points

Hi Cvetolin,

Also, I like to know how to setup the interrupt for EDMA3 memory to memory transfer completion.

Thanks.

Steve

0 lding over 5 years ago in reply to SGQ

TI__Guru* 95265 points

Hi,

EDMA transfer once is submitted, you can't stop it. If the EDMA is out of the sync for some reason, you may re-do a transfer from the same source address to the same destination to overwrite the destination buffer again with:

CSL_edma3HwChannelControl(EMIF16hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL);

How to setup transfer completion interrupt, you may look at some materials:
processors.wiki.ti.com/.../TTO_EDMA3_LLD.pdf
processors.wiki.ti.com/.../Configuring_Interrupts_on_Keystone_Devices

Regards, Eric

0 SGQ over 5 years ago in reply to lding

Expert 2875 points

Hi Eric,
Thanks for the quick reply.
Another question, How can I setup a EDMA3 completion interrupt?
Thank you.
Regards,
Steve

0 lding over 5 years ago in reply to SGQ

TI__Guru* 95265 points

Hi,

Most of the EDMA examples used the polling IPR bit for transfer completion. For the EDMA completion interrupt, you may looked at the Hyperlink example for C6657, under pdk_c665x_2_0_x\packages\ti\drv\hyplnk, search for hyplnk_edma_cb_isr1() to see how that was done.

Regards, Eric

0 SGQ over 5 years ago in reply to lding

Expert 2875 points

Hi Eric,
We are currently using pdk_C6657_1_1_2_6. It doesn't have hyplnk_edma_cb_isr1().
Thanks.
Steve

0 lding over 5 years ago in reply to SGQ

TI__Guru* 95265 points

Hi,

Pdk 1.1.2.6 is part of mcsdk 2.1.2.6 and was already obsolete. You can refer to the C6657 Processor SDK RTOS code, this is just showing an example of EDMA interrupt callback. The download link is: software-dl.ti.com/.../index_FDS.html

Another way is you can refer to the link processors.wiki.ti.com/.../Configuring_Interrupts_on_Keystone_Devices

Regards, Eric

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RTOS/TMS320C6657: How to stop an EDMA3 memory to memory transfer?