dMAX service McASP event in spru795d

Constantine Musatoff

Part "3.6.1 EXAMPLE: Servicing McASP Peripheral" of dMAX description includes sample of programing dMAX for service McASP0.

1. Why this sample uses Event#18 instead of Event#5 (MCASP0RX)?
2. Why DINDX2 = 0xFFED? On page 134 I see R5(0) address 0x10001050 and to move address to 0x10001004 need add 0xFFB4.

3. Why SRC = 0x54000000 (Base McASP0 address, but not 0x54000280 McASP0.RBUF[0])?

4. Why SINDX0=1, SINDX1=SINDX2 = 0xFFFE?

over 11 years ago

0 Constantine Musatoff over 11 years ago

Intellectual 880 points

Question 2 I solved. This is number of dwords.

Other questions are standing.

0 Constantine Musatoff over 11 years ago in reply to Constantine Musatoff

Intellectual 880 points

Question 3 explained in "3.3.2 Transfers through the dMAX Port"

0 Constantine Musatoff over 11 years ago

Intellectual 880 points

I got to work after several tests DMAX. It works with McCASP thru event MCASP0RX #5 but not #18 as in example.

0 Sivaraj Kuppuraj over 11 years ago in reply to Constantine Musatoff

TI__Mastermind 35645 points

Hi Constantine,

Thanks for your post.

Why don't you try CSL example code & experiment using CSL API's available to get Event Ids for a Particular Peripheral like "DMA_getEventId(hDma)" from the below location:

http://www.ti.com/tool/sprc223

There is an application report in which if you refer Section 6.3 to know CSL API details to get event Ids, event status etc. as given below:

http://www.ti.com/lit/an/spraa10/spraa10.pdf

Thanks & regards,

Sivaraj K

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0 Constantine Musatoff over 11 years ago in reply to Sivaraj Kuppuraj

Intellectual 880 points

Thank you Sivaraj!

I am writing a program for a long time and like to understand how hardware works. It helps make programs more quality. At least it helped earlier when I write programs for AVR, ARM, x86 and F28x.

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dMAX service McASP event in spru795d