DMAI and Asynchronous EMIF Interface - dm365

Claudio Filipponi

Hello,

I'm working on dm365 and I'd like to customize the "encode demo" (dvsdk_2_10_01_18) in order to write encoded data into an external buffer, through AEMIF (instead of write to a file).

I'm new in DMAI; is it possible to do it using DMAI layer?

Can you give me some guideline ( docs, examples..) on how to have access to external device through EMIF using DMAI or Codec engine?

Thanks!
Claudio

over 15 years ago

0 Niclas over 15 years ago

TI__Expert 3220 points

Hi Claudio,

DMAI or Codec Engine doesn't handle transporting your data to the EMIF. Unless there is a device driver for EMIF provided in the PSP, you will have to write one and pass your data to this device driver.

Regards, Niclas

0 Claudio Filipponi over 15 years ago in reply to Niclas

Intellectual 680 points

Hi Niclas,

looking into the PSP folder (dvsdk_2_10_01_18/PSP_02_10_00_14) I don't see any device driver for EMIF.

where can I check it?

thanks,

Claudio

0 Claudio Filipponi over 15 years ago in reply to Claudio Filipponi

Intellectual 680 points

Hello,

can anyone tell me if AEMIF driver for dm365 is available?

How can I proceed to allocate a buffer on CE1 space (async mem) using DMAI or Codec Engine?

Thanks

Claudio

0 Sekhar Nori over 15 years ago in reply to Claudio Filipponi

TI__Expert 6385 points

Hi Claudio,

There is no seperate AEMIF driver in the kernel. Drivers exist for users of the AEMIF interface (eg NOR, NAND flash etc).

To access AEMIF CE1 space in user space you can consider mapping that area using mmap system call on /dev/mem. To access the memory in kernel space, you can use ioremap() to create a kernel usable mapping.

Thanks,

Sekhar

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DMAI and Asynchronous EMIF Interface - dm365