RTEMS: Xdmad_module

| RTEMS 5.4-rc2

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Xdmad_module
Board Support Packages » ARM » Atmel/Microchip SAM E70, S70, V70 and V71 » Contributed Code

# xDma Configuration Usage

To configure a XDMA channel, the user has to follow these few steps :

- Initialize a XDMA driver instance by XDMAD_Initialize().
- choose an available (disabled) channel using XDMAD_AllocateChannel().
- After the XDMAC selected channel has been programmed, XDMAD_PrepareChannel() is to enable clock and dma peripheral of the DMA, and set Configuration register to set up the transfer type (memory or non-memory peripheral for source and destination) and flow control device.
- Invoke XDMAD_StartTransfer() to start DMA transfer or XDMAD_StopTransfer() to force stop DMA transfer.
- Once the buffer of data is transferred, XDMAD_IsTransferDone() checks if DMA transfer is finished.
- XDMAD_Handler() handles XDMA interrupt, and invoking XDMAD_SetCallback() if provided.

Related files:
xdmad.h
xdmad.c.