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85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include "esp_vfs_common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Add /dev/uart virtual filesystem driver
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*
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* This function is called from startup code to enable serial output
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*/
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void uart_vfs_dev_register(void);
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/**
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* @brief Set the line endings expected to be received on specified UART
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*
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* This specifies the conversion between line endings received on UART and
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* newlines ('\n', LF) passed into stdin:
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*
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* - ESP_LINE_ENDINGS_CRLF: convert CRLF to LF
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* - ESP_LINE_ENDINGS_CR: convert CR to LF
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* - ESP_LINE_ENDINGS_LF: no modification
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*
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* @note this function is not thread safe w.r.t. reading from UART
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*
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* @param uart_num the UART number
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* @param mode line endings to send to UART
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*
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* @return 0 if succeeded, or -1
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* when an error (specified by errno) have occurred.
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*/
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int uart_vfs_dev_port_set_rx_line_endings(int uart_num, esp_line_endings_t mode);
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/**
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* @brief Set the line endings to sent to specified UART
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*
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* This specifies the conversion between newlines ('\n', LF) on stdout and line
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* endings sent over UART:
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*
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* - ESP_LINE_ENDINGS_CRLF: convert LF to CRLF
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* - ESP_LINE_ENDINGS_CR: convert LF to CR
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* - ESP_LINE_ENDINGS_LF: no modification
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*
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* @note this function is not thread safe w.r.t. writing to UART
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*
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* @param uart_num the UART number
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* @param mode line endings to send to UART
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*
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* @return 0 if succeeded, or -1
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* when an error (specified by errno) have occurred.
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*/
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int uart_vfs_dev_port_set_tx_line_endings(int uart_num, esp_line_endings_t mode);
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/**
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* @brief set VFS to use simple functions for reading and writing UART
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*
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* Read is non-blocking, write is busy waiting until TX FIFO has enough space.
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* These functions are used by default.
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*
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* @param uart_num UART peripheral number
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*/
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void uart_vfs_dev_use_nonblocking(int uart_num);
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/**
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* @brief set VFS to use UART driver for reading and writing
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*
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* @note Application must configure UART driver before calling these functions
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* With these functions, read and write are blocking and interrupt-driven.
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*
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* @param uart_num UART peripheral number
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*/
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void uart_vfs_dev_use_driver(int uart_num);
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#ifdef __cplusplus
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}
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#endif
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