489c523870
Previously VFS driver for UART could only use simple non-blocking functions to read from and write to the UART. UART driver provides more complex blocking and interrupt-driven functions, which can be used instead. This commit adds optional support for using UART driver's functions. Also added is a more flexible mechanism for configuring newline conversion rules on input and output. This commit also fixes a bug that all UARTs shared one static variable used as a character buffer in newline conversion code. This variable is changed to be per-UART.
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
// 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.
|
|
|
|
#ifndef __ESP_VFS_DEV_H__
|
|
#define __ESP_VFS_DEV_H__
|
|
|
|
#include "esp_vfs.h"
|
|
|
|
/**
|
|
* @brief Line ending settings
|
|
*/
|
|
typedef enum {
|
|
ESP_LINE_ENDINGS_CRLF,//!< CR + LF
|
|
ESP_LINE_ENDINGS_CR, //!< CR
|
|
ESP_LINE_ENDINGS_LF, //!< LF
|
|
} esp_line_endings_t;
|
|
|
|
/**
|
|
* @brief add /dev/uart virtual filesystem driver
|
|
*
|
|
* This function is called from startup code to enable serial output
|
|
*/
|
|
void esp_vfs_dev_uart_register();
|
|
|
|
/**
|
|
* @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);
|
|
|
|
/**
|
|
* @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);
|
|
|
|
/**
|
|
* @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);
|
|
|
|
#endif //__ESP_VFS_DEV_H__
|