TMS320F280049: Example for transferring ADC result buffer to RAM buffer using DMA

Anders Lange

Genius 14355 points

Part Number: TMS320F280049
Other Parts Discussed in Thread: C2000WARE,

Hi C2000 team.

Could you provide an example transferring a ADC result buffer to a RAM buffer using DMA.

Anders Lange

over 6 years ago

0 Todd Anderson78572 over 6 years ago

Guru 14640 points

Anders:
I looked for an example in C2000Ware, and I could not find one.

However,
processors.wiki.ti.com/.../C2000_Multi-Day_Workshop

has a DMA lab (for F2837x) that could potentially be "ported" to the F280049 environment.

Hopefully, that helps.

0 Brian Fortman over 6 years ago in reply to Todd Anderson78572

TI__Expert 7650 points

Hi Anders,

The following example was suggested:

adc_soc_continuous_dma

which can be found in C2000Ware here:

C:\ti\c2000\C2000Ware_1_00_05_00\device_support\f2837xd\examples\cpu1\adc_soc_continuous_dma\cpu01

0 Anders Lange over 6 years ago in reply to Brian Fortman

TI__Genius 14355 points

Hi Brian.
Thanks for a quick reply.
The Driverlib for the TMS320F2837xD is different than the driverlib for the TMS320F280049.
That means that examples for the TMS320F2837xD cant be used.

BR
Anders

0 Whitney Dewey over 6 years ago in reply to Anders Lange

TI__Guru 52555 points

Anders,

What difference are you referring to? The example Brian referenced uses bit-field structure header files which are provided for both F2837xD and F28004x. Any difference between them should be minor and related to hardware differences (e.g. F2837xD ADC supports 16-bit mode while F28004x does not).

If you are having trouble finding the header files for F28004x, they are found under:
C:\ti\c2000\C2000Ware_1_00_05_00\device_support\f28004x

Whitney

0 Anders Lange over 6 years ago in reply to Whitney Dewey

TI__Genius 14355 points

The issue was found.

After adding the #PRAGMA to make sure the buffers was placed in GSRAM the DMA worked as described:

#pragma DATA_SECTION(TestSource, "ramgs0");

#pragma DATA_SECTION(TestDestination, "ramgs0");

Anders Lange

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280049: Example for transferring ADC result buffer to RAM buffer using DMA