esp-idf/components/esp_system/include/esp_private/usb_console.h
2020-06-26 15:38:49 +02:00

74 lines
2.1 KiB
C

// Copyright 2019-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @file usb_console.h
* This file contains definitions of low-level USB console functions.
* These functions are not considered to be a public interface and
* should not be called by applications directly.
* Application interface to the USB console is provided either by
* "cdcacm" VFS driver, or by the USB CDC driver in TinyUSB.
*/
/**
* RX/TX callback function type
* @param arg callback-specific context pointer
*/
typedef void (*esp_usb_console_cb_t)(void* arg);
/**
* Initialize USB console output using ROM USB CDC driver.
* This function is called by the early startup code if USB CDC is
* selected as the console output option.
* @return
* - ESP_OK on success
* - ESP_ERR_NO_MEM
* - other error codes from the interrupt allocator
*/
esp_err_t esp_usb_console_init(void);
/**
* Write a buffer to USB CDC
* @param buf data to write
* @param size size of the data, in bytes
* @return -1 on error, otherwise the number of bytes
*/
ssize_t esp_usb_console_write_buf(const char* buf, size_t size);
ssize_t esp_usb_console_flush(void);
ssize_t esp_usb_console_read_buf(char* buf, size_t buf_size);
bool esp_usb_console_read_available(void);
bool esp_usb_console_write_available(void);
esp_err_t esp_usb_console_set_cb(esp_usb_console_cb_t rx_cb, esp_usb_console_cb_t tx_cb, void* arg);
#ifdef __cplusplus
}
#endif