DMA_Init_TypeDef Struct Reference

Detailed Description

DMA init structure

Definition at line 325 of file em_dma.h.

#include <em_dma.h>

Data Fields
DMA_DESCRIPTOR_TypeDef *	controlBlock
uint8_t	hprot

Field Documentation

DMA_DESCRIPTOR_TypeDef* DMA_Init_TypeDef::controlBlock

Pointer to the controlblock in memory holding descriptors (channel control data structures). This memory must be properly aligned at a 256 bytes. I.e. the 8 least significant bits must be zero.

Please refer to the reference manual, DMA chapter for more details.

It is possible to provide a smaller memory block, only covering those channels actually used, if not all available channels are used. Ie, if only using 4 channels (0-3), both primary and alternate structures, then only 16*2*4 = 128 bytes must be provided. This implementation has however no check if later exceeding such a limit by configuring for instance channel 4, in which case memory overwrite of some other data will occur.

Definition at line 352 of file em_dma.h.

Referenced by DMA_Init().

uint8_t DMA_Init_TypeDef::hprot

HPROT signal state when accessing the primary/alternate descriptors. Normally set to 0 if protection is not an issue. The following bits are available:

• bit 0 - HPROT[1] control for descriptor accesses (ie when the DMA controller accesses the channel control block itself), privileged/non-privileged access

Definition at line 335 of file em_dma.h.

Referenced by DMA_Init().

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The documentation for this struct was generated from the following file:

• D:/jenkins-slave/workspaces/Executor-0/super/platform/emlib/inc/em_dma.h