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TMS320F280049C: Automiatic read data from IF3 by DMA

user4133728

Prodigy 80 points

Part Number: TMS320F280049C
Other Parts Discussed in Thread: C2000WARE

Hello,

I want to use IF3 and DMA to receive data from mailbox1 automatically, without interrupt. This CAN is only used to receive data, and can receive four bytes data once( periods = 100us). received data will be moved to destination address(A DWORD type) by DMA. the destination address is fixed, the contents of this DWORD is updated per 100us.

Does this idea work? How to achieve this? Is there CODE/APP NOTE share with me? thanks!

over 4 years ago

0 Manoj Santha Mohan over 4 years ago

TI__Guru 55700 points

Hi,

We don't have a ready made app note / code to share. CAN example available in C2000Ware are the only examples available.

Where you stuck with your implementation? Do you have any specific question?

Regards,

Manoj

0 user4133728 over 4 years ago in reply to Manoj Santha Mohan

Prodigy 80 points

Hi,

My questiones:

1) Please kindly confirm if this idea will work.

2) No example available in C2000Ware is for IF3 application. Could you provide references for IF3 with DMA configuration?

Thanks!

0 user4133728 over 4 years ago in reply to user4133728

Prodigy 80 points

My stuck: there is no DMA trigger when CAN has recieved data, but I can read CAN data from IF2 by interrupt.

0 Manoj Santha Mohan over 4 years ago in reply to user4133728

TI__Guru 55700 points

Yes, you can use DMA to receive messages from CAN (using IF3)

One of my team members pointed out that there is CAN DMA example (can_ex4_loopback_dma.c) using IF2. You can modify that to your application.

Regards,

Manoj