esp-idf/components/console/esp_console_repl.c

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// Copyright 2016-2019 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.
#include <stdint.h>
#include <stdio.h>
#include "sdkconfig.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_console.h"
#include "esp_vfs_dev.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/uart.h"
#include "linenoise/linenoise.h"
static const char *TAG = "console.repl";
#define CONSOLE_PROMPT_LEN_MAX (32)
typedef enum {
CONSOLE_REPL_STATE_DEINIT,
CONSOLE_REPL_STATE_INIT,
CONSOLE_REPL_STATE_START,
} repl_state_t;
static repl_state_t s_repl_state = CONSOLE_REPL_STATE_DEINIT;
/**
* @brief Prompt to be printed before each line.
*
*/
static char s_prompt[CONSOLE_PROMPT_LEN_MAX];
/**
* @brief path to save history commands in file system
*
*/
static const char *s_history_save_path = NULL;
/**
* @brief REPL task handle
*
*/
static TaskHandle_t s_repl_task_hdl = NULL;
static void esp_console_repl_thread(void *param)
{
// waiting for task notify
ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
while (s_repl_state == CONSOLE_REPL_STATE_START) {
char *line = linenoise(s_prompt);
if (line == NULL) {
ESP_LOGD(TAG, "empty line");
/* Ignore empty lines */
continue;
}
/* Add the command to the history */
linenoiseHistoryAdd(line);
/* Save command history to filesystem */
if (s_history_save_path) {
linenoiseHistorySave(s_history_save_path);
}
/* Try to run the command */
int ret;
esp_err_t err = esp_console_run(line, &ret);
if (err == ESP_ERR_NOT_FOUND) {
printf("Unrecognized command\n");
} else if (err == ESP_ERR_INVALID_ARG) {
// command was empty
} else if (err == ESP_OK && ret != ESP_OK) {
printf("Command returned non-zero error code: 0x%x (%s)\n", ret, esp_err_to_name(ret));
} else if (err != ESP_OK) {
printf("Internal error: %s\n", esp_err_to_name(err));
}
/* linenoise allocates line buffer on the heap, so need to free it */
linenoiseFree(line);
}
ESP_LOGD(TAG, "The End");
vTaskDelete(NULL);
}
esp_err_t esp_console_repl_init(const esp_console_repl_config_t *config)
{
esp_err_t ret = ESP_OK;
if (!config) {
ret = ESP_ERR_INVALID_ARG;
goto _exit;
}
// check if already initialized
if (s_repl_state != CONSOLE_REPL_STATE_DEINIT) {
ESP_LOGE(TAG, "already initialized");
ret = ESP_ERR_INVALID_STATE;
goto _exit;
}
/* Drain stdout before reconfiguring it */
fflush(stdout);
fsync(fileno(stdout));
/* Disable buffering on stdin */
setvbuf(stdin, NULL, _IONBF, 0);
/* Minicom, screen, idf_monitor send CR when ENTER key is pressed */
esp_vfs_dev_uart_set_rx_line_endings(ESP_LINE_ENDINGS_CR);
/* Move the caret to the beginning of the next line on '\n' */
esp_vfs_dev_uart_set_tx_line_endings(ESP_LINE_ENDINGS_CRLF);
/* Configure UART. Note that REF_TICK is used so that the baud rate remains
* correct while APB frequency is changing in light sleep mode.
*/
const uart_config_t uart_config = {
.baud_rate = CONFIG_ESP_CONSOLE_UART_BAUDRATE,
.data_bits = UART_DATA_8_BITS,
.parity = UART_PARITY_DISABLE,
.stop_bits = UART_STOP_BITS_1,
.source_clk = UART_SCLK_REF_TICK,
};
/* Install UART driver for interrupt-driven reads and writes */
ret = uart_driver_install(CONFIG_ESP_CONSOLE_UART_NUM, 256, 0, 0, NULL, 0);
if (ret != ESP_OK) {
goto _exit;
}
uart_param_config(CONFIG_ESP_CONSOLE_UART_NUM, &uart_config);
/* Tell VFS to use UART driver */
esp_vfs_dev_uart_use_driver(CONFIG_ESP_CONSOLE_UART_NUM);
/* Initialize the console */
esp_console_config_t console_config = ESP_CONSOLE_CONFIG_DEFAULT();
#if CONFIG_LOG_COLORS
console_config.hint_color = atoi(LOG_COLOR_CYAN);
#endif
ret = esp_console_init(&console_config);
if (ret != ESP_OK) {
goto _console_del;
}
ret = esp_console_register_help_command();
if (ret != ESP_OK) {
goto _console_del;
}
ret = esp_console_register_quit_command();
if (ret != ESP_OK) {
goto _console_del;
}
/* Configure linenoise line completion library */
/* Enable multiline editing. If not set, long commands will scroll within single line */
linenoiseSetMultiLine(1);
/* Tell linenoise where to get command completions and hints */
linenoiseSetCompletionCallback(&esp_console_get_completion);
linenoiseSetHintsCallback((linenoiseHintsCallback *)&esp_console_get_hint);
if (config->history_save_path) {
s_history_save_path = config->history_save_path;
/* Load command history from filesystem */
linenoiseHistoryLoad(s_history_save_path);
}
/* Set command history size */
if (linenoiseHistorySetMaxLen(config->max_history_len) != 1) {
ESP_LOGE(TAG, "set max history length to %d failed", config->max_history_len);
ret = ESP_FAIL;
goto _console_del;
}
/* set command line prompt */
const char *prompt_temp = "esp>";
if (config->prompt) {
prompt_temp = config->prompt;
}
snprintf(s_prompt, CONSOLE_PROMPT_LEN_MAX - 1, LOG_COLOR_I "%s " LOG_RESET_COLOR, prompt_temp);
printf("\r\n"
"Type 'help' to get the list of commands.\r\n"
"Use UP/DOWN arrows to navigate through command history.\r\n"
"Press TAB when typing command name to auto-complete.\r\n");
/* Figure out if the terminal supports escape sequences */
int probe_status = linenoiseProbe();
if (probe_status) {
/* zero indicates success */
printf("\r\n"
"Your terminal application does not support escape sequences.\n\n"
"Line editing and history features are disabled.\n\n"
"On Windows, try using Putty instead.\r\n");
linenoiseSetDumbMode(1);
#if CONFIG_LOG_COLORS
/* Since the terminal doesn't support escape sequences,
* don't use color codes in the s_prompt.
*/
snprintf(s_prompt, CONSOLE_PROMPT_LEN_MAX - 1, "%s ", prompt_temp);
#endif //CONFIG_LOG_COLORS
}
/* spawn a single thread to run REPL */
if (xTaskCreate(esp_console_repl_thread, "console_repl", config->task_stack_size,
NULL, config->task_priority, &s_repl_task_hdl) != pdTRUE) {
ret = ESP_FAIL;
goto _console_del;
}
s_repl_state = CONSOLE_REPL_STATE_INIT;
return ret;
_console_del:
esp_console_deinit();
esp_vfs_dev_uart_use_nonblocking(CONFIG_ESP_CONSOLE_UART_NUM);
uart_driver_delete(CONFIG_ESP_CONSOLE_UART_NUM);
s_repl_state = CONSOLE_REPL_STATE_DEINIT;
_exit:
return ret;
}
esp_err_t esp_console_repl_deinit(void)
{
esp_err_t ret = ESP_OK;
// check if already de-initialized
if (s_repl_state == CONSOLE_REPL_STATE_DEINIT) {
ESP_LOGE(TAG, "not initialized yet");
ret = ESP_ERR_INVALID_STATE;
goto _exit;
}
s_repl_state = CONSOLE_REPL_STATE_DEINIT;
esp_console_deinit();
esp_vfs_dev_uart_use_nonblocking(CONFIG_ESP_CONSOLE_UART_NUM);
uart_driver_delete(CONFIG_ESP_CONSOLE_UART_NUM);
s_repl_task_hdl = NULL;
s_history_save_path = NULL;
_exit:
return ret;
}
esp_err_t esp_console_repl_start(void)
{
esp_err_t ret = ESP_OK;
// check if already initialized
if (s_repl_state != CONSOLE_REPL_STATE_INIT) {
ret = ESP_ERR_INVALID_STATE;
goto _exit;
}
s_repl_state = CONSOLE_REPL_STATE_START;
xTaskNotifyGive(s_repl_task_hdl);
_exit:
return ret;
}
/* handle 'quit' command */
static int do_cmd_quit(int argc, char **argv)
{
printf("ByeBye\r\n");
esp_console_repl_deinit();
return 0;
}
esp_err_t esp_console_register_quit_command(void)
{
esp_console_cmd_t command = {
.command = "quit",
.help = "Quit REPL environment",
.func = &do_cmd_quit
};
return esp_console_cmd_register(&command);
}