send_cdc_request() function

Send CDC specific request Helper function that will send CDC specific request to default endpoint. Both IN and OUT requests are sent through this API, depending on the in_transfer parameter. @see Chapter 6.2, USB CDC specification rev. 1.2

Syntax

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Summary

Declaration

Definition

from cdc_acm_host.c:131

static esp_err_t send_cdc_request(cdc_dev_t *cdc_dev, bool in_transfer, cdc_request_code_t request, uint8_t *data, uint16_t data_len, uint16_t value);

Implemented in cdc_acm_host.c:1059

Arguments

Argument

Description

cdc_dev

Pointer to CDC device

in_transfer

Direction of data phase. true: IN, false: OUT

request

CDC request code

data

Pointer to data buffer. Input for OUT transfers, output for IN transfers.

data_len

Length of data buffer

value

Value to be set in bValue of Setup packet

Return value

esp_err_t

Notes

CDC specific requests are only supported by devices that have dedicated management element.

Examples

References

from examples

send_cdc_request() function

Syntax

Arguments

Return value

Notes

Examples

References

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