116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2022 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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#include <stdio.h>
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#include <stdio_ext.h>
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#include "esp_log.h"
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#include "cdc.h"
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#include "tusb_console.h"
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#include "tinyusb.h"
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#include "vfs_tinyusb.h"
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#include "esp_check.h"
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#define STRINGIFY(s) STRINGIFY2(s)
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#define STRINGIFY2(s) #s
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static const char *TAG = "tusb_console";
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typedef struct {
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FILE *in;
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FILE *out;
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FILE *err;
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} console_handle_t;
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static console_handle_t con;
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/**
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* @brief Reopen standard streams using a new path
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*
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* @param f_in - pointer to a pointer holding a file for in or NULL to don't change stdin
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* @param f_out - pointer to a pointer holding a file for out or NULL to don't change stdout
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* @param f_err - pointer to a pointer holding a file for err or NULL to don't change stderr
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* @param path - mount point
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* @return esp_err_t ESP_FAIL or ESP_OK
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*/
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static esp_err_t redirect_std_streams_to(FILE **f_in, FILE **f_out, FILE **f_err, const char *path)
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{
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if (f_in) {
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*f_in = freopen(path, "r", stdin);
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if (*f_in == NULL) {
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ESP_LOGE(TAG, "Failed to reopen in!");
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return ESP_FAIL;
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}
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}
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if (f_out) {
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*f_out = freopen(path, "w", stdout);
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if (*f_out == NULL) {
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ESP_LOGE(TAG, "Failed to reopen out!");
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return ESP_FAIL;
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}
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}
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if (f_err) {
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*f_err = freopen(path, "w", stderr);
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if (*f_err == NULL) {
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ESP_LOGE(TAG, "Failed to reopen err!");
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return ESP_FAIL;
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}
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}
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return ESP_OK;
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}
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/**
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* @brief Restore output to default
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*
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* @param f_in - pointer to a pointer of an in file updated with `redirect_std_streams_to` or NULL to don't change stdin
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* @param f_out - pointer to a pointer of an out file updated with `redirect_std_streams_to` or NULL to don't change stdout
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* @param f_err - pointer to a pointer of an err file updated with `redirect_std_streams_to` or NULL to don't change stderr
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* @return esp_err_t ESP_FAIL or ESP_OK
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*/
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static esp_err_t restore_std_streams(FILE **f_in, FILE **f_out, FILE **f_err)
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{
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const char *default_uart_dev = "/dev/uart/" STRINGIFY(CONFIG_ESP_CONSOLE_UART_NUM);
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if (f_in) {
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stdin = freopen(default_uart_dev, "r", *f_in);
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if (stdin == NULL) {
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ESP_LOGE(TAG, "Failed to reopen stdin!");
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return ESP_FAIL;
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}
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}
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if (f_out) {
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stdout = freopen(default_uart_dev, "w", *f_out);
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if (stdout == NULL) {
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ESP_LOGE(TAG, "Failed to reopen stdout!");
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return ESP_FAIL;
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}
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}
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if (f_err) {
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stderr = freopen(default_uart_dev, "w", *f_err);
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if (stderr == NULL) {
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ESP_LOGE(TAG, "Failed to reopen stderr!");
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return ESP_FAIL;
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}
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}
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return ESP_OK;
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}
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esp_err_t esp_tusb_init_console(int cdc_intf)
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{
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/* Registering TUSB at VFS */
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ESP_RETURN_ON_ERROR(esp_vfs_tusb_cdc_register(cdc_intf, NULL), TAG, "");
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ESP_RETURN_ON_ERROR(redirect_std_streams_to(&con.in, &con.out, &con.err, "/dev/tusb_cdc"), TAG, "Failed to redirect STD streams");
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return ESP_OK;
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}
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esp_err_t esp_tusb_deinit_console(int cdc_intf)
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{
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ESP_RETURN_ON_ERROR(restore_std_streams(&con.in, &con.out, &con.err), TAG, "Failed to restore STD streams");
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esp_vfs_tusb_cdc_unregister(NULL);
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return ESP_OK;
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}
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