Print Page - DMA Access GPIO

Title: DMA Access GPIO
Post by: mehdi.soheili on January 21, 2016, 11:58:57 PM

Hi everybody
i want to work with a13 mcu ,i have a question.
in my project i need push out some data from sdram to gpio port on the fly.
in allwinner a13 DMA could access GPIO or not?
anybody could test it for me?
tnx a lot for help me :)

Title: Re: DMA Access GPIO
Post by: mehdi.soheili on April 01, 2016, 02:34:11 PM

hi
anybody could try it for me
i don't have board and want to buy it
tnx alot

Title: Re: DMA Access GPIO
Post by: LeMury on April 01, 2016, 09:30:28 PM

Quote from: mehdi.soheili on January 21, 2016, 11:58:57 PM
Hi everybody
i want to work with a13 mcu ,i have a question.
in my project i need push out some data from sdram to gpio port on the fly.
in allwinner a13 DMA could access GPIO or not?
anybody could test it for me?
tnx a lot for help me :)

Judging from the A13 manual it seems that you can not select a GPIO Port as a source or destination for the DMA controller.
Only the usual peripherals like UART, SPI, AUDIO, USB etc.
See for example register NDMA_DST_DRQ_TYPE in the A13 manual.

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OLinuXino Android / Linux boards and System On Modules => A13 => Topic started by: mehdi.soheili on January 21, 2016, 11:58:57 PM