Kinetis Design StudioのトピックKSDK-1.1 SPI DMA

KSDK-1.1 SPI DMA

oaf — Wed, 14 Jan 2015 16:04:02 GMT

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

When adding a spi (fsl_dspi) device to my project I could set IRQ priorities and vector, but how do I enable DMA?

I see there is two different initialization functions:

1. DSPI_DRV_MasterInit

2. DSPI_DRV_EdmaMasterInit

I have not found out how to make PEx to use the DMA type. In Cpu.c the DSPI_DRV_MasterInit() is called.

Should I in my own code:

1. DSPI_DRV_MasterDeinit()

DSPI_DRV_EdmaMasterInit()

2. Just call DSPI_DRV_EdmaMasterInit()

Alice_Yang — Thu, 15 Jan 2015 01:26:59 GMT

Hi Ole,

You can configuration the spi_dma on here:

and the related spi_dma function are these :

Hope it helps

Alice

oaf — Thu, 15 Jan 2015 09:18:28 GMT

Well maybe I was a bit unclear, the PEx setup is OK but

When using IRQ:

DSPI_DRV_MasterInit() should be used

When using DMA:

DSPI_DRV_Edma_MasterInit() should be used

When I open the generated source file Cpu.c it calls the DSPI_DRV_MasterInit(),

so my question is how should I make Cpu.c to call DSPI_DRV_Edma_MasterInit()?

Alice_Yang — Thu, 15 Jan 2015 10:48:58 GMT

Hello Ole,

In generate code , the function "DSPI_DRV_EdmaMasterInit" can not auto show on cpu.c file.

You can directly drag it to the place you want , like this :

Hope it helps

Alice

oaf — Fri, 16 Jan 2015 14:49:42 GMT

Ok, and then I suppose I should ask the bean to NOT initialize the device?

Alice_Yang — Mon, 19 Jan 2015 05:17:46 GMT

Hi Ole,

There are two ways.

1) select "Auto initialization" , then writhe the initialize function of EDMA_SPI to the main function.

2) Do not initialization the device , you can checked the " Components_Init()" function like this :

So , you need write initialize code refer to your need to the main function.

In a word, check the driver function "Description", then select you need .

Hope it helps

Alice