console: simplify examples

1. simplify console examples
2. add "quit" command
3. support console command overwrite
4. add API reference

examples/ethernet/iperf/main/ethernet_example_main.c

@@ -1,4 +1,4 @@
-/* Console example
+/* Ethernet iperf example
 
    This example code is in the Public Domain (or CC0 licensed, at your option.)
 
@@ -9,18 +9,12 @@
 
 #include <stdio.h>
 #include <string.h>
-#include "esp_system.h"
+#include "sdkconfig.h"
 #include "esp_log.h"
 #include "esp_console.h"
-#include "esp_vfs_dev.h"
-#include "driver/uart.h"
-#include "linenoise/linenoise.h"
-#include "argtable3/argtable3.h"
-#include "cmd_decl.h"
 #include "esp_vfs_fat.h"
-#include "nvs.h"
-#include "nvs_flash.h"
-#include "sdkconfig.h"
+#include "cmd_system.h"
+#include "cmd_ethernet.h"
 
 static const char *TAG = "eth_example";
 
@@ -44,90 +38,20 @@ static void initialize_filesystem(void)
 }
 #endif // CONFIG_EXAMPLE_STORE_HISTORY
 
-static void initialize_nvs(void)
-{
-    esp_err_t err = nvs_flash_init();
-    if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) {
-        ESP_ERROR_CHECK(nvs_flash_erase());
-        err = nvs_flash_init();
-    }
-    ESP_ERROR_CHECK(err);
-}
-
-static void initialize_console(void)
-{
-    /* 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 */
-    ESP_ERROR_CHECK(uart_driver_install(CONFIG_ESP_CONSOLE_UART_NUM,
-                                        256, 0, 0, NULL, 0));
-    ESP_ERROR_CHECK(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 = {
-        .max_cmdline_args = 16,
-        .max_cmdline_length = 256,
-#if CONFIG_LOG_COLORS
-        .hint_color = atoi(LOG_COLOR_CYAN)
-#endif
-    };
-    ESP_ERROR_CHECK(esp_console_init(&console_config));
-
-    /* Configure linenoise line completion library */
-    linenoiseSetMultiLine(1);
-
-    /* Tell linenoise where to get command completions and hints */
-    linenoiseSetCompletionCallback(&esp_console_get_completion);
-    linenoiseSetHintsCallback((linenoiseHintsCallback *)&esp_console_get_hint);
-
-    /* Set command history size */
-    linenoiseHistorySetMaxLen(100);
-
-#if CONFIG_EXAMPLE_STORE_HISTORY
-    /* Load command history from filesystem */
-    linenoiseHistoryLoad(HISTORY_PATH);
-#endif
-}
-
 void app_main(void)
 {
-    initialize_nvs();
-
+    esp_console_repl_config_t repl_config = ESP_CONSOLE_REPL_CONFIG_DEFAULT();
 #if CONFIG_EXAMPLE_STORE_HISTORY
     initialize_filesystem();
+    repl_config.history_save_path = HISTORY_PATH;
 #endif
-
-    initialize_console();
+    // initialize console REPL environment
+    ESP_ERROR_CHECK(esp_console_repl_init(&repl_config));
 
     /* Register commands */
-    esp_console_register_help_command();
     register_system();
     register_ethernet();
 
-    /* Prompt to be printed before each line.
-     * This can be customized, made dynamic, etc.
-     */
-    const char *prompt = LOG_COLOR_I "esp32> " LOG_RESET_COLOR;
-
     printf("\n =======================================================\n");
     printf(" |       Steps to Test Ethernet Bandwidth              |\n");
     printf(" |                                                     |\n");
@@ -139,53 +63,6 @@ void app_main(void)
     printf(" |                                                     |\n");
     printf(" =======================================================\n\n");
 
-    /* Figure out if the terminal supports escape sequences */
-    int probe_status = linenoiseProbe();
-    if (probe_status) {
-        /* zero indicates success */
-        printf("\n"
-               "Your terminal application does not support escape sequences.\n"
-               "Line editing and history features are disabled.\n"
-               "On Windows, try using Putty instead.\n");
-        linenoiseSetDumbMode(1);
-#if CONFIG_LOG_COLORS
-        /* Since the terminal doesn't support escape sequences,
-         * don't use color codes in the prompt.
-         */
-        prompt = "esp32> ";
-#endif //CONFIG_LOG_COLORS
-    }
-
-    /* Main loop */
-    while (true) {
-        /* Get a line using linenoise.
-         * The line is returned when ENTER is pressed.
-         */
-        char *line = linenoise(prompt);
-        if (line == NULL) {
-            /* Ignore empty lines */
-            continue;
-        }
-        /* Add the command to the history */
-        linenoiseHistoryAdd(line);
-#if CONFIG_EXAMPLE_STORE_HISTORY
-        /* Save command history to filesystem */
-        linenoiseHistorySave(HISTORY_PATH);
-#endif
-
-        /* 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);
-    }
+    // start console REPL
+    ESP_ERROR_CHECK(esp_console_repl_start());
 }