add more complex examples (#1)
This commit is contained in:
Juraj Michálek
GitHub
parent
b51f7f449d
commit
a01d8580d9
12 changed files with 1657 additions and 204 deletions
3
.vscode/settings.json
vendored
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3
.vscode/settings.json
vendored
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{
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"idf.adapterTargetName": "esp32c2"
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}
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@ -1,6 +1,8 @@
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# The following five lines of boilerplate have to be in your project's
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# CMakeLists in this exact order for cmake to work correctly
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cmake_minimum_required(VERSION 3.16)
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include($ENV{IDF_PATH}/tools/cmake/project.cmake)
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project(esp32-c3-lua-test)
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project(esp32-lua-example)
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get_filename_component(configName "${CMAKE_BINARY_DIR}" NAME)
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list(APPEND EXTRA_COMPONENT_DIRS "${CMAKE_SOURCE_DIR}/components/esp_littlefs")
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littlefs_create_partition_image(assets assets FLASH_IN_PROJECT)
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25
README.md
25
README.md
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@ -1,9 +1,24 @@
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# ESP32-C3 Lua evaluation example
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# ESP32 Lua Evaluation Example
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## Build
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This example demonstrates how to use Lua 5.4 on ESP32, leveraging the LittleFS filesystem to run Lua scripts from external files. It also showcases Wi-Fi scanning and embedded Lua scripts.
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```shell
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idf.py set-target esp32c3
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## Prerequisites
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- ESP-IDF version 5.1.0 or higher
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- Components:
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- [Lua 5.4](https://components.espressif.com/components/georgik/lua/)
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- [LittleFS 1.14](https://components.espressif.com/components/joltwallet/littlefs/)
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## File Structure
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- `main.c`: Main program containing embedded Lua script and file-based Lua execution.
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- `assets/`: Directory containing Lua scripts for QR code generation and Fibonacci computation.
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- `qr_code.lua`
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- `fibonacci.lua`
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## Build and Flash
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```bash
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idf.py set-target esp32 # Replace esp32 with your specific target, e.g., esp32c3
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idf.py build flash monitor
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```
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11
assets/fibonacci.lua
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11
assets/fibonacci.lua
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@ -0,0 +1,11 @@
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-- fibonacci.lua
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-- This script calculates the 10th number in the Fibonacci sequence and prints it.
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local function fibonacci(n)
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if n <= 1 then return n end
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return fibonacci(n - 1) + fibonacci(n - 2)
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end
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local fib_10 = fibonacci(10)
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print('Fibonacci of 10 is: ' .. fib_10)
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return fib_10
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58
assets/qr_code.lua
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58
assets/qr_code.lua
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@ -0,0 +1,58 @@
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-- qr_code.lua
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-- Generates and prints a QR code for a given text using luaqrcode
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-- Include the QR Code library
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local qrencode = dofile("/assets/qrencode.lua")
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-- Text to encode (using lowercase as per your request)
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local text = 'https://developer.espressif.com/tags/lua'
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-- Generate the QR code
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local ok, tab_or_message = qrencode.qrcode(text)
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if not ok then
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print("Error generating QR code: " .. tab_or_message)
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return
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end
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local function matrix_to_string(tab, padding, padding_char, white_pixel, black_pixel)
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padding = padding or 1
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white_pixel = white_pixel or ' '
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black_pixel = black_pixel or '██'
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padding_char = padding_char or white_pixel
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local str_tab = {} -- Hold each row of the QR code in a table
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-- Add padding rows at the top
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for i = 1, padding do
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table.insert(str_tab, string.rep(padding_char, #tab + 2 * padding))
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end
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for y = 1, #tab do
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local line = string.rep(padding_char, padding)
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for x = 1, #tab do
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if tab[x][y] > 0 then
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line = line .. black_pixel
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else
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line = line .. white_pixel
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end
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end
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line = line .. string.rep(padding_char, padding)
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table.insert(str_tab, line)
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end
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-- Add padding rows at the bottom
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for i = 1, padding do
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table.insert(str_tab, string.rep(padding_char, #tab + 2 * padding))
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end
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return str_tab
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end
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-- Convert the QR code matrix to a string
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local qr_lines = matrix_to_string(tab_or_message)
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-- Print the QR code
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print("QR Code for: " .. text)
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for _, line in ipairs(qr_lines) do
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print(line)
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end
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1353
assets/qrencode.lua
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1353
assets/qrencode.lua
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File diff suppressed because it is too large
Load diff
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@ -1,2 +1,2 @@
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idf_component_register(SRCS "esp32-c3-lua-test.c"
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idf_component_register(SRCS "esp32-lua-example.c"
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INCLUDE_DIRS ".")
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@ -1,182 +0,0 @@
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#include <stdio.h>
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#include <string.h>
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#include <lua.h>
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#include <lualib.h>
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#include <lauxlib.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_heap_caps.h"
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#include "esp_wifi.h"
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#include "esp_event.h"
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#include "nvs_flash.h"
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#include "esp_log.h"
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#define WIFI_SCAN_LIST_SIZE 10
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static const char *TAG = "WIFI_SCAN";
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// Function to log memory usage with the message at the end
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void log_memory_usage(const char *message)
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{
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printf("Free heap: %d, Min free heap: %d, Largest free block: %d, %s\n",
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heap_caps_get_free_size(MALLOC_CAP_DEFAULT),
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heap_caps_get_minimum_free_size(MALLOC_CAP_DEFAULT),
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heap_caps_get_largest_free_block(MALLOC_CAP_DEFAULT),
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message);
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}
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// Function to run a Lua test
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void run_lua_test(const char *lua_script, const char *test_name)
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{
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printf("Starting Lua test: %s\n", test_name);
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log_memory_usage("Start of test");
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lua_State *L = luaL_newstate();
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log_memory_usage("After luaL_newstate");
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luaL_openlibs(L);
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log_memory_usage("After luaL_openlibs");
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if (luaL_dostring(L, lua_script) == LUA_OK) {
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lua_pop(L, lua_gettop(L));
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}
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log_memory_usage("After executing Lua script");
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lua_close(L);
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log_memory_usage("After lua_close");
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printf("End of Lua test: %s\n", test_name);
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}
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// Function to run a Lua test and print returned QR code
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void run_lua_qr_code_test(const char *lua_script, const char *test_name)
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{
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printf("Starting Lua QR Code test: %s\n", test_name);
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log_memory_usage("Start of test");
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lua_State *L = luaL_newstate();
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log_memory_usage("After luaL_newstate");
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luaL_openlibs(L);
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log_memory_usage("After luaL_openlibs");
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if (luaL_dostring(L, lua_script) == LUA_OK) {
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// Retrieve the QR code string from the Lua stack
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const char *qr_code_string = lua_tostring(L, -1);
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if (qr_code_string) {
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printf("QR Code:\n%s\n", qr_code_string);
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}
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lua_pop(L, lua_gettop(L));
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}
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log_memory_usage("After executing Lua script");
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lua_close(L);
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log_memory_usage("After lua_close");
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printf("End of Lua QR Code test: %s\n", test_name);
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}
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// Function to initialize and perform Wi-Fi scan
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void scan_wifi_networks(void)
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{
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printf("Starting Wi-Fi scan...\n");
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// Initialize NVS
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK(ret);
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// Initialize Wi-Fi
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ESP_ERROR_CHECK(esp_netif_init());
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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esp_netif_create_default_wifi_sta();
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&cfg));
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// Start Wi-Fi in STA mode
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
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ESP_ERROR_CHECK(esp_wifi_start());
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// Set the Wi-Fi scan parameters
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wifi_scan_config_t scan_config = {
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.ssid = NULL,
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.bssid = NULL,
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.channel = 0,
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.show_hidden = true
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};
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// Perform Wi-Fi scan
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ESP_ERROR_CHECK(esp_wifi_scan_start(&scan_config, true));
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// Get the scan results
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uint16_t ap_count = WIFI_SCAN_LIST_SIZE;
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wifi_ap_record_t ap_info[WIFI_SCAN_LIST_SIZE];
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ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&ap_count, ap_info));
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// Print the scan results
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printf("Found %d access points:\n", ap_count);
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for (int i = 0; i < ap_count; i++) {
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printf("SSID: %s, RSSI: %d\n", ap_info[i].ssid, ap_info[i].rssi);
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}
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ESP_ERROR_CHECK(esp_wifi_stop());
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ESP_ERROR_CHECK(esp_wifi_deinit());
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printf("Wi-Fi scan completed.\n");
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}
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void app_main(void)
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{
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// Test 1: Simple Lua script
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const char *simple_script = "answer = 42; print('The answer is: '..answer)";
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run_lua_test(simple_script, "Simple Script");
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// Test 2: Simple Lua script to create a mock QR code representation
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const char *mock_qr_code_script =
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"local function generate_mock_qr(text)\n"
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" local result = ''\n"
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" for i = 1, #text do\n"
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" local char = text:byte(i)\n"
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" local line = ''\n"
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" for j = 1, 10 do\n" // 10x10 mock representation
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" if ((char + j) % 2 == 0) then\n"
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" line = line .. '##'\n"
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" else\n"
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" line = line .. ' '\n"
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" end\n"
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" end\n"
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" result = result .. line .. '\\n'\n"
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" end\n"
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" return result\n"
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"end\n"
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"local qr_string = generate_mock_qr('Hello, ESP32-C3!')\n"
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"return qr_string";
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run_lua_qr_code_test(mock_qr_code_script, "Mock QR Code Script");
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// Perform Wi-Fi scan
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scan_wifi_networks();
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// Test 3: Lua script to compute Fibonacci sequence
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const char *fibonacci_script =
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"local function fibonacci(n)\n"
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" if n <= 1 then return n end\n"
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" return fibonacci(n - 1) + fibonacci(n - 2)\n"
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"end\n"
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"local fib_10 = fibonacci(10)\n"
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"print('Fibonacci of 10 is: ' .. fib_10)\n"
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"return fib_10";
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run_lua_test(fibonacci_script, "Fibonacci Script");
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printf("End of testing application.\n");
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// Prevent the task from ending
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while(1) {
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vTaskDelay(pdMS_TO_TICKS(1000));
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}
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}
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190
main/esp32-lua-example.c
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190
main/esp32-lua-example.c
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#include <stdio.h>
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#include <string.h>
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#include <lua.h>
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#include <lualib.h>
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#include <lauxlib.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_heap_caps.h"
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#include "esp_wifi.h"
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#include "esp_event.h"
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#include "nvs_flash.h"
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#include "esp_log.h"
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#include "esp_vfs.h"
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#include "esp_littlefs.h"
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#include <dirent.h>
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#define WIFI_SCAN_LIST_SIZE 10
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#define LUA_FILE_PATH "/assets"
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static const char *TAG = "lua_example";
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// Function to log memory usage with the message at the end
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void log_memory_usage(const char *message) {
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ESP_LOGI(TAG, "Free heap: %d, Min free heap: %d, Largest free block: %d, %s",
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heap_caps_get_free_size(MALLOC_CAP_DEFAULT),
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heap_caps_get_minimum_free_size(MALLOC_CAP_DEFAULT),
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heap_caps_get_largest_free_block(MALLOC_CAP_DEFAULT),
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message);
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}
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// Initialize and mount the filesystem
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void init_filesystem() {
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ESP_LOGI(TAG, "Initializing File System");
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esp_vfs_littlefs_conf_t conf = {
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.base_path = LUA_FILE_PATH,
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.partition_label = "assets",
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.format_if_mount_failed = false,
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.dont_mount = false,
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};
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esp_err_t err = esp_vfs_littlefs_register(&conf);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "Failed to mount or format filesystem");
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} else {
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ESP_LOGI(TAG, "Filesystem mounted at %s", LUA_FILE_PATH);
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}
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}
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// Function to run a Lua script from file
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void run_lua_file(const char *file_name, const char *test_name) {
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ESP_LOGI(TAG, "Starting Lua test from file: %s", test_name);
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log_memory_usage("Start of test");
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lua_State *L = luaL_newstate();
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if (L == NULL) {
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ESP_LOGE(TAG, "Failed to create new Lua state");
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return;
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}
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log_memory_usage("After luaL_newstate");
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luaL_openlibs(L);
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// Set the Lua module search path to include the assets directory
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if (luaL_dostring(L, "package.path = package.path .. ';./?.lua;/assets/?.lua'")) {
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ESP_LOGE(TAG, "Failed to set package.path: %s", lua_tostring(L, -1));
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lua_pop(L, 1); // Remove error message from the stack
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}
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log_memory_usage("After luaL_openlibs");
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// Construct the full file path
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char full_path[128];
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snprintf(full_path, sizeof(full_path), LUA_FILE_PATH"/%s", file_name);
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if (luaL_dofile(L, full_path) == LUA_OK) {
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lua_pop(L, lua_gettop(L));
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} else {
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ESP_LOGE(TAG, "Error running Lua script from file '%s': %s", full_path, lua_tostring(L, -1));
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lua_pop(L, 1); // Remove error message from the stack
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}
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log_memory_usage("After executing Lua script from file");
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lua_close(L);
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log_memory_usage("After lua_close");
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ESP_LOGI(TAG, "End of Lua test from file: %s", test_name);
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}
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// Function to run an embedded Lua script
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void run_embedded_lua_test(const char *lua_script, const char *test_name) {
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ESP_LOGI(TAG, "Starting Lua test: %s", test_name);
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log_memory_usage("Start of test");
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lua_State *L = luaL_newstate();
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if (L == NULL) {
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ESP_LOGE(TAG, "Failed to create new Lua state");
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return;
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}
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log_memory_usage("After luaL_newstate");
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luaL_openlibs(L);
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log_memory_usage("After luaL_openlibs");
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if (luaL_dostring(L, lua_script) == LUA_OK) {
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lua_pop(L, lua_gettop(L));
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} else {
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ESP_LOGE(TAG, "Error running embedded Lua script: %s", lua_tostring(L, -1));
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lua_pop(L, 1); // Remove error message from the stack
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}
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log_memory_usage("After executing Lua script");
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lua_close(L);
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log_memory_usage("After lua_close");
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ESP_LOGI(TAG, "End of Lua test: %s", test_name);
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}
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// Function to scan Wi-Fi networks
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void scan_wifi_networks(void) {
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ESP_LOGI(TAG, "Starting Wi-Fi scan...");
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_LOGW(TAG, "NVS Flash init error (%s), erasing...", esp_err_to_name(ret));
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK(ret);
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ESP_ERROR_CHECK(esp_netif_init());
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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esp_netif_create_default_wifi_sta();
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|
||||
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
|
||||
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
|
||||
|
||||
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
|
||||
ESP_ERROR_CHECK(esp_wifi_start());
|
||||
|
||||
wifi_scan_config_t scan_config = {
|
||||
.ssid = NULL,
|
||||
.bssid = NULL,
|
||||
.channel = 0,
|
||||
.show_hidden = true
|
||||
};
|
||||
|
||||
ESP_ERROR_CHECK(esp_wifi_scan_start(&scan_config, true));
|
||||
|
||||
uint16_t ap_count = WIFI_SCAN_LIST_SIZE;
|
||||
wifi_ap_record_t ap_info[WIFI_SCAN_LIST_SIZE];
|
||||
ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&ap_count, ap_info));
|
||||
|
||||
ESP_LOGI(TAG, "Found %d access points:", ap_count);
|
||||
for (int i = 0; i < ap_count; i++) {
|
||||
ESP_LOGI(TAG, "SSID: %s, RSSI: %d", ap_info[i].ssid, ap_info[i].rssi);
|
||||
}
|
||||
|
||||
ESP_ERROR_CHECK(esp_wifi_stop());
|
||||
ESP_ERROR_CHECK(esp_wifi_deinit());
|
||||
|
||||
ESP_LOGI(TAG, "Wi-Fi scan completed.");
|
||||
}
|
||||
|
||||
void app_main(void) {
|
||||
// Initialize and mount the filesystem
|
||||
init_filesystem();
|
||||
|
||||
// Test 1: Simple embedded Lua script
|
||||
const char *simple_script = "answer = 42; print('The answer is: '..answer)";
|
||||
run_embedded_lua_test(simple_script, "Simple Embedded Script");
|
||||
|
||||
// Test 2: Run Lua script from a file (e.g., fibonacci.lua)
|
||||
run_lua_file("fibonacci.lua", "Fibonacci Script from File");
|
||||
|
||||
// Test 3: Run Lua script to generate QR code (e.g., qr_code.lua)
|
||||
run_lua_file("qr_code.lua", "QR Code Script from File");
|
||||
|
||||
// Perform Wi-Fi scan
|
||||
scan_wifi_networks();
|
||||
|
||||
ESP_LOGI(TAG, "End of testing application.");
|
||||
|
||||
// Prevent the task from ending
|
||||
while (1) {
|
||||
vTaskDelay(pdMS_TO_TICKS(1000));
|
||||
}
|
||||
}
|
||||
|
|
@ -1,17 +1,8 @@
|
|||
## IDF Component Manager Manifest File
|
||||
dependencies:
|
||||
georgik/lua: "^5.5.0"
|
||||
georgik/lua: "==5.4.7"
|
||||
joltwallet/littlefs: "==1.14.8"
|
||||
|
||||
## Required IDF version
|
||||
idf:
|
||||
version: ">=4.1.0"
|
||||
# # Put list of dependencies here
|
||||
# # For components maintained by Espressif:
|
||||
# component: "~1.0.0"
|
||||
# # For 3rd party components:
|
||||
# username/component: ">=1.0.0,<2.0.0"
|
||||
# username2/component2:
|
||||
# version: "~1.0.0"
|
||||
# # For transient dependencies `public` flag can be set.
|
||||
# # `public` flag doesn't have an effect dependencies of the `main` component.
|
||||
# # All dependencies of `main` are public by default.
|
||||
# public: true
|
||||
|
|
|
|||
6
partitions.csv
Normal file
6
partitions.csv
Normal file
|
|
@ -0,0 +1,6 @@
|
|||
# ESP-IDF Partition Table
|
||||
# Name, Type, SubType, Offset, Size, Flags
|
||||
nvs, data, nvs, 0x9000, 24K,
|
||||
phy_init, data, phy, 0xf000, 4K,
|
||||
factory, app, factory, 0x10000, 2M,
|
||||
assets, data, spiffs,0x210000, 1896K,
|
||||
|
6
sdkconfig.defaults
Normal file
6
sdkconfig.defaults
Normal file
|
|
@ -0,0 +1,6 @@
|
|||
# This file was generated using idf.py save-defconfig. It can be edited manually.
|
||||
# Espressif IoT Development Framework (ESP-IDF) 5.4.0 Project Minimal Configuration
|
||||
#
|
||||
CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
|
||||
CONFIG_PARTITION_TABLE_CUSTOM=y
|
||||
CONFIG_ESP_MAIN_TASK_STACK_SIZE=32000
|
||||
Loading…
Add table
Add a link
Reference in a new issue