esp_dma_capable_calloc() function

Helper function for calloc a DMA capable memory buffer

Syntax

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Declaration

Definition

from esp_dma_utils.h:59

esp_err_t esp_dma_capable_calloc(size_t calloc_num, size_t size, const esp_dma_mem_info_t *dma_mem_info, void **out_ptr, size_t *actual_size);

Implemented in esp_dma_utils.c:191

Arguments

Argument

Description

calloc_num

Number of elements to allocate

size

Size in bytes, the amount of memory to allocate

dma_mem_info

DMA and memory info, see `esp_dma_mem_info_t`

out_ptr

A pointer to the memory allocated successfully

actual_size

Actual size for allocation in bytes, when the size you specified doesn't meet the DMA alignment requirements, this value might be bigger than the size you specified. Set null if you don't care this value.

Return value

- ESP_OK: - ESP_ERR_INVALID_ARG: Invalid argument - ESP_ERR_NO_MEM: No enough memory for allocation

Examples

References

from examples

esp_dma_capable_calloc() function

Syntax

Arguments

Return value

Examples

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