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Hey guys,

I try to transfer data from internal to external memory using the DAT_copy2d
function.
Here are the relevant parts of my test program (I am using the DM642 cycle
accurate simulator.):

#pragma DATA_SECTION(bufferTest,".test") // section test is mapped to
external memory
#pragma DATA_ALIGN(bufferTest2,8)
#pragma DATA_ALIGN(bufferTest,8)	
uint8_t bufferTest[16] = {1,2,3,4,5,6,7,87,9,10,6,4,2,6,8,3}; // uint8_t = 8
bit
uint8_t bufferTest2[8] ={33,33,33,33,33,33,33,33};

main() {
....

CSL_init();
CACHE_enableCaching(CACHE_EMIFA_CE00);
CACHE_setL2Mode(CACHE_32KCACHE);
....

flag1 = DAT_open ( DAT_CHAANY, DAT_PRI_LOW, DAT_OPEN_2D);
CACHE_wbInvAllL2(CACHE_WAIT);
id1 = DAT_copy2d(DAT_1D2D, bufferTest2,bufferTest,2,2,2);
DAT_wait(id1);

...
}

 As long as "bufferTest"is in internal memory, it works fine, the first 4
bytes are copied.
As soon as I move bufferTest to external memory the transfer doesn't work as
expected anymore:
Sometimes it writes only the first byte, sometimes nothing, sometimes at
wrong places.

I'll appreciate it If anybody can tell me how I properly move Data from
internal Ram to external .
-dorian

Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Transcoding Solution
for Commercial & Consumer End Equipment: www.ti.com/dm6467

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Hey Chao, Dear Group
=D0=BB=D0=BB=C4=E3=A1=A3

I need Caching enabled in my application so, as you suggested in second
order I put a=20=20
"CACHE_wbL2(bufferTest2, 8, CACHE_WAIT);" after the DAT_wait() line.=20
You are right, the DMA started to copy !

But as usual, as soon as I "solve" one problem, the next one pops up... I
hate it ... nothing is smooth.
Anyway, the DMA ONLY copies if the " lineLen" parameter (4th param of
DAT_copy2d) is 2.=20
Anything else (but 6) doesn=A1=AFt transfer data. I really start hating thi=
s DMA
sh**.
(Again, if bufferTest is in internal Ram, it works with any parameter)

Here  is the code that only works properly with lineLen =3D 2:
#pragma DATA_SECTION(bufferTest,".test") // section test is mapped to
external memory
#pragma DATA_ALIGN(bufferTest2,8)
#pragma DATA_ALIGN(bufferTest,8)=20
uint8_t bufferTest[16] =3D {1,2,3,4,5,6,7,87,9,10,6,4,2,6,8,3}; // uint8_t =
=3D 8
bit
uint8_t bufferTest2[8] =3D{33,33,33,33,33,33,33,33};

main() {
....

CSL_init();
CACHE_enableCaching(CACHE_EMIFA_CE00);
CACHE_setL2Mode(CACHE_32KCACHE);
....

flag1 =3D DAT_open (
     DAT_CHAANY,
     DAT_PRI_LOW,
     DAT_OPEN_2D
);
    //CACHE_wbL2(bufferTest2, 8, CACHE_WAIT);
    id1 =3D DAT_copy2d(DAT_1D2D, bufferTest2,bufferTest,2,4,10); // why onl=
y 2
works ? I need to transfer a 16x16 array

    DAT_wait(id1);
    CACHE_wbL2(bufferTest2, 8, CACHE_WAIT);

....

}

Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Tr=
anscoding Solution for Commercial & Consumer End Equipment: www.ti.com/dm64=
67

=20

(You need to be a member of c6x -- send a blank email to c6x-subscribe@yahoogroups.com )

Hey guys,

here is my extremely sophisticated solution for the problem:

Use code composer 3.3 instead of 3.1 - et viol=E0 !

-dorian

Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Tr=
anscoding Solution for Commercial & Consumer End Equipment: www.ti.com/dm64=
67

=20

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