lldesc_setup_link_constrained() function

Generate a linked list pointing to a (huge) buffer in an descriptor array. The caller should ensure there is enough size to hold the array, by calling ``lldesc_get_required_num_constrained`` with the same max_desc_size argument.

Syntax

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Declaration

Definition

from lldesc.h:36

void lldesc_setup_link_constrained(lldesc_t *out_desc_array, const void *buffer, int size, int max_desc_size, bool isrx);

Implemented in lldesc.c:3

Arguments

Argument

Description

out_desc_array

Output of a descriptor array, the head should be fed to the DMA.

buffer

Buffer for the descriptors to point to.

size

Size (or length for TX) of the buffer

max_desc_size

Maximum length of each descriptor

isrx

The RX DMA may require the buffer to be word-aligned, set to true for a RX link, otherwise false.

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lldesc_setup_link_constrained() function

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lldesc_setup_link_constrained() function

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