essl_spi_rddma_seg() function

Read one data segment from the slave through its DMA.

Syntax

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Summary

Declaration

Definition

esp_err_t essl_spi_rddma_seg(spi_device_handle_t spi, uint8_t *out_data, int seg_len, uint32_t flags);

Implemented in essl_spi.c:161

Argument

Description

spi

SPI device handle representing the slave

out_data

Buffer to hold the received data. strongly suggested to be in the DRAM and aligned to 4

seg_len

Length of this segment

flags

`SPI_TRANS_*` flags to control the transaction mode of the transaction to send.

- ESP_OK: success - or other return value from :cpp:func:`spi_device_transmit`.

To read long buffer, call :cpp:func:`essl_spi_rddma` instead.

from examples