Convert the main menu screen to lua lol

lib/esp-idf-lua/examples/custom_lib/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.5)
+
+set(EXTRA_COMPONENT_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../..)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(example-lua-custom-lib)

lib/esp-idf-lua/examples/custom_lib/Makefile

@@ -0,0 +1,5 @@
+PROJECT_NAME := example-lua-custom-lib
+
+EXTRA_COMPONENT_DIRS := $(CURDIR)/../..
+
+include $(IDF_PATH)/make/project.mk

lib/esp-idf-lua/examples/custom_lib/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRC_DIRS "."
+                    INCLUDE_DIRS ".")

lib/esp-idf-lua/examples/custom_lib/main/component.mk

@@ -0,0 +1,2 @@
+COMPONENT_ADD_INCLUDEDIRS = .
+COMPONENT_SRCDIRS = .

lib/esp-idf-lua/examples/custom_lib/main/gpiolib.c

@@ -0,0 +1,61 @@
+#include "gpiolib.h"
+#include <driver/gpio.h>
+
+static void lua_esp_check_err(lua_State *L, esp_err_t err)
+{
+    if (err != ESP_OK)
+        luaL_error(L, "Error: %s", esp_err_to_name(err));
+}
+
+static int lgpio_reset_pin(lua_State *L)
+{
+    gpio_num_t pin = luaL_checkinteger(L, 1);
+
+    lua_esp_check_err(L, gpio_reset_pin(pin));
+
+    return 0;
+}
+
+static int lgpio_set_level(lua_State *L)
+{
+    gpio_num_t pin = luaL_checkinteger(L, 1);
+    int level = luaL_checkinteger(L, 2);
+
+    lua_esp_check_err(L, gpio_set_level(pin, level));
+
+    return 0;
+}
+
+static int lgpio_get_level(lua_State *L)
+{
+    gpio_num_t pin = luaL_checkinteger(L, 1);
+    lua_pushinteger(L, gpio_get_level(pin));
+
+    return 1;
+}
+
+static int lgpio_set_direction(lua_State *L)
+{
+    gpio_num_t pin = luaL_checkinteger(L, 1);
+    int mode = luaL_checkinteger(L, 2);
+
+    lua_esp_check_err(L, gpio_set_direction(pin, mode));
+
+    return 0;
+}
+
+static const struct luaL_Reg lgpio_funcs[] = {
+    { "reset_pin", lgpio_reset_pin },
+    { "set_direction", lgpio_set_direction },
+    { "set_level", lgpio_set_level },
+    { "get_level", lgpio_get_level },
+    { NULL, NULL }
+};
+
+int luaopen_lgpio(lua_State *L)
+{
+    luaL_newlib(L, lgpio_funcs);
+
+    return 1;
+}
+

lib/esp-idf-lua/examples/custom_lib/main/gpiolib.h

@@ -0,0 +1,9 @@
+#ifndef MAIN_GPIOLIB_H_
+#define MAIN_GPIOLIB_H_
+
+#include <lua/lua.h>
+#include <lua/lauxlib.h>
+
+int luaopen_lgpio(lua_State *L);
+
+#endif /* MAIN_GPIOLIB_H_ */

lib/esp-idf-lua/examples/custom_lib/main/main.c

@@ -0,0 +1,83 @@
+#include <stdio.h>
+#include <inttypes.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+#include <string.h>
+#include <lua/lua.h>
+#include <lua/lauxlib.h>
+#include <lua/lualib.h>
+
+#include "gpiolib.h"
+#include "rtoslib.h"
+
+#define GPIO_PIN "5"
+
+static void load_custom_libs(lua_State *L)
+{
+    luaL_requiref(L, "gpio", luaopen_lgpio, 1);
+    lua_pop(L, 1);
+
+    luaL_requiref(L, "rtos", luaopen_lrtos, 1);
+    lua_pop(L, 1);
+}
+
+static const char *prg =
+        "gpio.set_direction(" GPIO_PIN ", 2)\n"
+        "level = 1\n"
+        "for i = 1, 100 do\n"
+        "  print(string.format(\"Iteration %d..., GPIO5=%d\", i, level))\n"
+        "  gpio.set_level(" GPIO_PIN ", level)\n"
+        "  level = 1 - level\n"
+        "  rtos.delay(500)\n"
+        "end\n";
+
+static void report(lua_State *L, int status)
+{
+    if (status == LUA_OK)
+        return;
+
+    const char *msg = lua_tostring(L, -1);
+    printf("%s\n", msg);
+    lua_pop(L, 1);
+}
+
+void test(void *arg)
+{
+    printf("Program:\n%s\n", prg);
+
+    lua_State *L = luaL_newstate();
+    if (!L)
+    {
+        printf("Could not create state\n");
+        while (1) { vTaskDelay(1000); }
+    }
+
+    luaL_openlibs(L);
+    load_custom_libs(L);
+
+    int r = luaL_loadstring(L, prg);
+    if (r)
+    {
+        report(L, r);
+        while (1) { vTaskDelay(1000); }
+    }
+
+    r = lua_pcall(L, 0, 0, 0);
+    if (r)
+        report(L, r);
+
+    lua_close(L);
+
+    printf("State closed, heap: %" PRIu32 "\n", xPortGetFreeHeapSize());
+    while (1)
+    {
+        printf(".");
+        fflush(stdout);
+        vTaskDelay(pdMS_TO_TICKS(100));
+    }
+}
+
+void app_main()
+{
+    xTaskCreate(test, "test", 0x10000, NULL, 5, NULL);
+}

lib/esp-idf-lua/examples/custom_lib/main/rtoslib.c

@@ -0,0 +1,24 @@
+#include "rtoslib.h"
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+
+static int ldelay(lua_State *L)
+{
+    int ms = luaL_checkinteger(L, 1);
+
+    vTaskDelay(pdMS_TO_TICKS(ms));
+
+    return 0;
+}
+
+static const struct luaL_Reg lrtos_funcs[] = {
+    { "delay", ldelay },
+    { NULL, NULL }
+};
+
+int luaopen_lrtos(lua_State *L)
+{
+    luaL_newlib(L, lrtos_funcs);
+
+    return 1;
+}

lib/esp-idf-lua/examples/custom_lib/main/rtoslib.h

@@ -0,0 +1,9 @@
+#ifndef MAIN_RTOSLIB_H_
+#define MAIN_RTOSLIB_H_
+
+#include <lua/lua.h>
+#include <lua/lauxlib.h>
+
+int luaopen_lrtos(lua_State *L);
+
+#endif /* MAIN_RTOSLIB_H_ */