OVMS3-idf/components/console/esp_console_repl.c

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// Copyright 2016-2020 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 <sys/cdefs.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.uart";
#define CONSOLE_PROMPT_MAX_LEN (32)
typedef enum {
CONSOLE_REPL_STATE_DEINIT,
CONSOLE_REPL_STATE_INIT,
CONSOLE_REPL_STATE_START,
} repl_state_t;
typedef struct {
esp_console_repl_t repl_core; // base class
char prompt[CONSOLE_PROMPT_MAX_LEN]; // Prompt to be printed before each line
repl_state_t state;
const char *history_save_path;
TaskHandle_t task_hdl; // REPL task handle
} esp_console_repl_com_t;
typedef struct {
esp_console_repl_com_t repl_com; // base class
int uart_channel; // uart channel number
} esp_console_repl_uart_t;
static void esp_console_repl_task(void *args);
static esp_err_t esp_console_repl_uart_delete(esp_console_repl_t *repl);
static esp_err_t esp_console_common_init(esp_console_repl_com_t *repl_com);
static esp_err_t esp_console_setup_prompt(const char *prompt, esp_console_repl_com_t *repl_com);
static esp_err_t esp_console_setup_history(const char *history_path, uint32_t max_history_len, esp_console_repl_com_t *repl_com);
esp_err_t esp_console_new_repl_uart(const esp_console_dev_uart_config_t *dev_config, const esp_console_repl_config_t *repl_config, esp_console_repl_t **ret_repl)
{
esp_err_t ret = ESP_OK;
esp_console_repl_uart_t *uart_repl = NULL;
if (!repl_config | !dev_config | !ret_repl) {
ret = ESP_ERR_INVALID_ARG;
goto _exit;
}
// allocate memory for console REPL context
uart_repl = calloc(1, sizeof(esp_console_repl_uart_t));
if (!uart_repl) {
ret = ESP_ERR_NO_MEM;
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 = dev_config->baud_rate,
.data_bits = UART_DATA_8_BITS,
.parity = UART_PARITY_DISABLE,
.stop_bits = UART_STOP_BITS_1,
.source_clk = UART_SCLK_REF_TICK,
};
uart_param_config(dev_config->channel, &uart_config);
uart_set_pin(dev_config->channel, dev_config->tx_gpio_num, dev_config->rx_gpio_num, -1, -1);
/* Install UART driver for interrupt-driven reads and writes */
ret = uart_driver_install(dev_config->channel, 256, 0, 0, NULL, 0);
if (ret != ESP_OK) {
goto _exit;
}
/* Tell VFS to use UART driver */
esp_vfs_dev_uart_use_driver(dev_config->channel);
// initialize console, common part
ret = esp_console_common_init(&uart_repl->repl_com);
if (ret != ESP_OK) {
goto _exit;
}
// setup history
ret = esp_console_setup_history(repl_config->history_save_path, repl_config->max_history_len, &uart_repl->repl_com);
if (ret != ESP_OK) {
goto _exit;
}
// setup prompt
esp_console_setup_prompt(repl_config->prompt, &uart_repl->repl_com);
/* spawn a single thread to run REPL */
if (xTaskCreate(esp_console_repl_task, "console_repl", repl_config->task_stack_size,
&uart_repl->repl_com, repl_config->task_priority, &uart_repl->repl_com.task_hdl) != pdTRUE) {
ret = ESP_FAIL;
goto _exit;
}
uart_repl->uart_channel = dev_config->channel;
uart_repl->repl_com.state = CONSOLE_REPL_STATE_INIT;
uart_repl->repl_com.repl_core.del = esp_console_repl_uart_delete;
*ret_repl = &uart_repl->repl_com.repl_core;
return ESP_OK;
_exit:
if (uart_repl) {
esp_console_deinit();
uart_driver_delete(dev_config->channel);
free(uart_repl);
}
if (ret_repl) {
*ret_repl = NULL;
}
return ret;
}
esp_err_t esp_console_start_repl(esp_console_repl_t *repl)
{
esp_err_t ret = ESP_OK;
esp_console_repl_com_t *repl_com = __containerof(repl, esp_console_repl_com_t, repl_core);
// check if already initialized
if (repl_com->state != CONSOLE_REPL_STATE_INIT) {
ret = ESP_ERR_INVALID_STATE;
goto _exit;
}
repl_com->state = CONSOLE_REPL_STATE_START;
xTaskNotifyGive(repl_com->task_hdl);
return ESP_OK;
_exit:
return ret;
}
static esp_err_t esp_console_setup_prompt(const char *prompt, esp_console_repl_com_t *repl_com)
{
/* set command line prompt */
const char *prompt_temp = "esp>";
if (prompt) {
prompt_temp = prompt;
}
snprintf(repl_com->prompt, CONSOLE_PROMPT_MAX_LEN - 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(repl_com->prompt, CONSOLE_PROMPT_MAX_LEN - 1, "%s ", prompt_temp);
#endif //CONFIG_LOG_COLORS
}
return ESP_OK;
}
static esp_err_t esp_console_setup_history(const char *history_path, uint32_t max_history_len, esp_console_repl_com_t *repl_com)
{
esp_err_t ret = ESP_OK;
repl_com->history_save_path = history_path;
if (history_path) {
/* Load command history from filesystem */
linenoiseHistoryLoad(history_path);
}
/* Set command history size */
if (linenoiseHistorySetMaxLen(max_history_len) != 1) {
ESP_LOGE(TAG, "set max history length to %d failed", max_history_len);
ret = ESP_FAIL;
goto _exit;
}
return ESP_OK;
_exit:
return ret;
}
static esp_err_t esp_console_common_init(esp_console_repl_com_t *repl_com)
{
esp_err_t ret = ESP_OK;
/* 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 _exit;
}
ret = esp_console_register_help_command();
if (ret != ESP_OK) {
goto _exit;
}
/* 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);
return ESP_OK;
_exit:
return ret;
}
static esp_err_t esp_console_repl_uart_delete(esp_console_repl_t *repl)
{
esp_err_t ret = ESP_OK;
esp_console_repl_com_t *repl_com = __containerof(repl, esp_console_repl_com_t, repl_core);
esp_console_repl_uart_t *uart_repl = __containerof(repl_com, esp_console_repl_uart_t, repl_com);
// check if already de-initialized
if (repl_com->state == CONSOLE_REPL_STATE_DEINIT) {
ESP_LOGE(TAG, "already de-initialized");
ret = ESP_ERR_INVALID_STATE;
goto _exit;
}
repl_com->state = CONSOLE_REPL_STATE_DEINIT;
esp_console_deinit();
esp_vfs_dev_uart_use_nonblocking(uart_repl->uart_channel);
uart_driver_delete(uart_repl->uart_channel);
free(uart_repl);
_exit:
return ret;
}
static void esp_console_repl_task(void *args)
{
esp_console_repl_com_t *repl_com = (esp_console_repl_com_t *)args;
// waiting for task notify
ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
while (repl_com->state == CONSOLE_REPL_STATE_START) {
char *line = linenoise(repl_com->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 (repl_com->history_save_path) {
linenoiseHistorySave(repl_com->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);
}