Kinetis Software Development Kit中的主题 eDMA ScatterGatter

eDMA ScatterGatter

oaf — Tue, 20 Jan 2015 15:27:13 GMT

I'm using KDS-2.0.0 and KSDK-1.1.0.

I need to run a DMA transfer for one cycle, and think of using EDMA_DRV_ConfigScatterGatherTransfer()

with a list of only one destination (source is I2S device).

Unfortunately there doesn't seem to be any example for this, is there anyone which have a sample to provide?

Re: eDMA ScatterGatter

jeremyzhou — Fri, 23 Jan 2015 09:20:18 GMT

Hi Ole Asbjorn Fadum,

Unfortunately, there's no demo that integrate with ScatterGatter function in SDK now.

However I can share a demo which using the eDMA ScatterGatter feature to transfer the data to external flash through the SPI interface.

The demo was created for another customer in a few month ago and the original demo spi_demo is from the TWR-K60D100M sample code KINETIS512_V2_SC,

you should use the spi_demo.c and isr.h in the SPI_DMA_TEST_Scenario2_scatter_gather file instead of the these files in the original demo, it's done.
Have a great day,
Ping

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Re: eDMA ScatterGatter

oaf — Mon, 26 Jan 2015 07:41:28 GMT

Thanks, I'm trying to work with KSDK so the register -> API mapping must be done of course, but it's a start.