essl_send_packet() function

Send a packet to the ESSL Slave. The Slave receives the packet into buffers whose size is ``buffer_size`` (configured during initialization).

Syntax

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Summary

Declaration

Definition

from essl.h:97

esp_err_t essl_send_packet(essl_handle_t handle, const void *start, size_t length, uint32_t wait_ms);

Implemented in essl.c:57

Arguments

Argument

Description

handle

Handle of an ESSL device.

start

Start address of the packet to send

length

Length of data to send, if the packet is over-size, the it will be divided into blocks and hold into different buffers automatically.

wait_ms

Millisecond to wait before timeout, will not wait at all if set to 0-9.

Return value

- ESP_OK Success - ESP_ERR_INVALID_ARG: Invalid argument, handle is not init or other argument is not valid. - ESP_ERR_TIMEOUT: No buffer to use, or error ftrom SDMMC host controller. - ESP_ERR_NOT_FOUND: Slave is not ready for receiving. - ESP_ERR_NOT_SUPPORTED: This API is not supported in this mode - One of the error codes from SDMMC/SPI host controller.