UPP EOL interrupt missing

Some more configurations:

Single data rate,

16bit data width,

DMA read burst size = 256 bytes

Hi Charles,

Have you configured properly UPPIES & UPPIEC registers for enabling interrupts on uPP interface?

If yes, What is the UPPIES & UPPIEC value?

Hi, Titusrathinaraj

I've enabled all the interrupts.

UPP_UPIES = 0x1f1f

UPP_UPIEC = 

0x1f1f

The interrupts are predictable. I checked UPIS1 each time EOL happened, the  LNCNT increased by 6. 

Hi,

Charles said:

The problem is when I sent 1MB data to UPP, I can only get 6 EOLs. But I can see that all 1MB data is correctly written into memory. Can somebody figure out why?

Please refer the chapter 2.8.1 of uPP user's guide for missing the EOL interrupts.

I think that you are running UPP at maximum freq (as like fast transfer.)

If EOL interrupts are mandatory then try to reduce uPP operating freq and increase the line size.

Do you have intended reason for getting EOL interrupts?

If not, then disable EOL interrupts and enable only EOW interrupts in UPIEC(0x0F0F) & UPIES(0x0F0F)

Please refer our old e2e post.

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/55296.aspx

I hope it helps.

Hi, Titusrathinaraj

Thank you for your advise. 

Please note that I have set the line size to 31KB which I think it is big enough for CPU to handle all the interrupts. Plus, the missing interrupts are predictable, it doesn't seem like the interrupts are missed because the CPU is too busy.

One more question, what is the maximum value of the line size? I thought it would be 64KB because the maximum line offset is 64KB. But according to my experiment result, the line size cannot exceed 32KB?

BR