esp-idf/components/vfs/include/esp_vfs_dev.h

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// Copyright 2015-2017 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 "esp_vfs.h"
#include "esp_vfs_common.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief add /dev/uart virtual filesystem driver
*
* This function is called from startup code to enable serial output
*/
void esp_vfs_dev_uart_register(void);
/**
* @brief Set the line endings expected to be received on UART
*
* This specifies the conversion between line endings received on UART and
* newlines ('\n', LF) passed into stdin:
*
* - ESP_LINE_ENDINGS_CRLF: convert CRLF to LF
* - ESP_LINE_ENDINGS_CR: convert CR to LF
* - ESP_LINE_ENDINGS_LF: no modification
*
* @note this function is not thread safe w.r.t. reading from UART
*
* @param mode line endings expected on UART
*/
void esp_vfs_dev_uart_set_rx_line_endings(esp_line_endings_t mode) __attribute__((deprecated));
/**
* @brief Set the line endings to sent to UART
*
* This specifies the conversion between newlines ('\n', LF) on stdout and line
* endings sent over UART:
*
* - ESP_LINE_ENDINGS_CRLF: convert LF to CRLF
* - ESP_LINE_ENDINGS_CR: convert LF to CR
* - ESP_LINE_ENDINGS_LF: no modification
*
* @note this function is not thread safe w.r.t. writing to UART
*
* @param mode line endings to send to UART
*/
void esp_vfs_dev_uart_set_tx_line_endings(esp_line_endings_t mode) __attribute__((deprecated));
/**
* @brief Set the line endings expected to be received on specified UART
*
* This specifies the conversion between line endings received on UART and
* newlines ('\n', LF) passed into stdin:
*
* - ESP_LINE_ENDINGS_CRLF: convert CRLF to LF
* - ESP_LINE_ENDINGS_CR: convert CR to LF
* - ESP_LINE_ENDINGS_LF: no modification
*
* @note this function is not thread safe w.r.t. reading from UART
*
* @param uart_num the UART number
* @param mode line endings to send to UART
* @return 0 if successed, or -1
* when an error (specified by errno) have occurred.
*/
int esp_vfs_dev_uart_port_set_rx_line_endings(int uart_num, esp_line_endings_t mode);
/**
* @brief Set the line endings to sent to specified UART
*
* This specifies the conversion between newlines ('\n', LF) on stdout and line
* endings sent over UART:
*
* - ESP_LINE_ENDINGS_CRLF: convert LF to CRLF
* - ESP_LINE_ENDINGS_CR: convert LF to CR
* - ESP_LINE_ENDINGS_LF: no modification
*
* @note this function is not thread safe w.r.t. writing to UART
*
* @param uart_num the UART number
* @param mode line endings to send to UART
* @return 0 if successed, or -1
* when an error (specified by errno) have occurred.
*/
int esp_vfs_dev_uart_port_set_tx_line_endings(int uart_num, esp_line_endings_t mode);
/**
* @brief set VFS to use simple functions for reading and writing UART
* Read is non-blocking, write is busy waiting until TX FIFO has enough space.
* These functions are used by default.
* @param uart_num UART peripheral number
*/
void esp_vfs_dev_uart_use_nonblocking(int uart_num);
/**
* @brief set VFS to use UART driver for reading and writing
* @note application must configure UART driver before calling these functions
* With these functions, read and write are blocking and interrupt-driven.
* @param uart_num UART peripheral number
*/
void esp_vfs_dev_uart_use_driver(int uart_num);
#ifdef __cplusplus
}
#endif