add LittlevGL demo

add LittlevGL demo on stm32f746 discovery board

components/gui/LittlevGL/3rdparty/lv_examples/lv_apps/terminal/terminal.c

@@ -0,0 +1,176 @@
+/**
+ * @file terminal.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "terminal.h"
+#if LV_USE_TERMINAL
+
+/*********************
+ *      DEFINES
+ *********************/
+#define TERMINAL_ANIM_TIME   100 /*[ms]*/
+#define TERMINAL_NO_INPUT    0   /*Do not create Text area and Keyboard*/
+#define TERMINAL_LOG_LENGTH  512        /*Characters*/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static void clr_event_cb(lv_obj_t * btn, lv_event_t event);
+static void win_close_action(lv_obj_t * btn, lv_event_t event);
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+static lv_obj_t * win;
+static char txt_log[TERMINAL_LOG_LENGTH + 1];
+static lv_obj_t * label;
+static lv_obj_t * clr_btn;
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+/**
+ * Open a terminal
+ * @return pointer to the terminal window
+ */
+lv_obj_t * terminal_create(void)
+{
+    static lv_style_t style_bg;
+    lv_style_copy(&style_bg, &lv_style_pretty);
+    style_bg.body.main_color = lv_color_make(0x30, 0x30, 0x30);
+    style_bg.body.grad_color = lv_color_make(0x30, 0x30, 0x30);
+    style_bg.body.border.color = LV_COLOR_WHITE;
+    style_bg.text.color = lv_color_make(0xE0, 0xE0, 0xE0);
+
+
+
+    lv_coord_t hres = lv_disp_get_hor_res(NULL);
+    lv_coord_t vres = lv_disp_get_ver_res(NULL);
+
+    win = lv_win_create(lv_disp_get_scr_act(NULL), NULL);
+    lv_win_set_style(win, LV_WIN_STYLE_BG, &style_bg);
+    lv_obj_set_size(win, hres, vres);
+    lv_win_set_sb_mode(win, LV_SB_MODE_AUTO);
+    lv_obj_t * win_btn = lv_win_add_btn(win, LV_SYMBOL_CLOSE);
+    lv_obj_set_event_cb(win_btn, win_close_action);
+
+    /*Make the window's content responsive*/
+    lv_win_set_layout(win, LV_LAYOUT_PRETTY);
+
+    /*Create a label for the text of the terminal*/
+    label = lv_label_create(win, NULL);
+    lv_label_set_long_mode(label, LV_LABEL_LONG_BREAK);
+    lv_obj_set_width(label, lv_win_get_width(win));
+    lv_label_set_static_text(label, txt_log);               /*Use the text array directly*/
+
+    /*Create a clear button*/
+    clr_btn = lv_btn_create(win, NULL);
+    lv_btn_set_fit(clr_btn, LV_FIT_TIGHT);
+    lv_obj_set_event_cb(clr_btn, clr_event_cb);
+    lv_obj_t * btn_label = lv_label_create(clr_btn, NULL);
+    lv_label_set_text(btn_label, "Clear");
+
+    return win;
+}
+
+/**
+ * Add data to the terminal
+ * @param txt_in character sting to add to the terminal
+ */
+void terminal_add(const char * txt_in)
+{
+    if(win == NULL) return;                 /*Check if the window is exists*/
+
+    uint16_t txt_len = strlen(txt_in);
+    uint16_t old_len = strlen(txt_log);
+
+    /*If the data is longer then the terminal ax size show the last part of data*/
+    if(txt_len > TERMINAL_LOG_LENGTH) {
+        txt_in += (txt_len - TERMINAL_LOG_LENGTH);
+        txt_len = TERMINAL_LOG_LENGTH;
+        old_len = 0;
+    }
+    /*If the text become too long 'forget' the oldest lines*/
+    else if(old_len + txt_len > TERMINAL_LOG_LENGTH) {
+        uint16_t new_start;
+        for(new_start = 0; new_start < old_len; new_start++) {
+            if(txt_log[new_start] == '\n') {
+                /*If there is enough space break*/
+                if(new_start >= txt_len) {
+                    /*Ignore line breaks*/
+                    while(txt_log[new_start] == '\n' || txt_log[new_start] == '\r') new_start++;
+                    break;
+                }
+            }
+        }
+
+        /* If it wasn't able to make enough space on line breaks
+         * simply forget the oldest characters*/
+        if(new_start == old_len) {
+            new_start = old_len - (TERMINAL_LOG_LENGTH - txt_len);
+        }
+        /*Move the remaining text to the beginning*/
+        uint16_t j;
+        for(j = new_start; j < old_len; j++) {
+            txt_log[j - new_start] = txt_log[j];
+        }
+        old_len = old_len - new_start;
+        txt_log[old_len] = '\0';
+
+    }
+
+    memcpy(&txt_log[old_len], txt_in, txt_len);
+    txt_log[old_len + txt_len] = '\0';
+
+    lv_label_set_static_text(label, txt_log);
+    lv_win_focus(win, clr_btn, TERMINAL_ANIM_TIME);
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+/**
+ * Called when the Clear button is click to clear the text of the terminal
+ * @param btn pointer to the clear button
+ * @param event the current event
+ */
+static void clr_event_cb(lv_obj_t * btn, lv_event_t event)
+{
+    (void) btn;    /*Unused*/
+
+    if(event != LV_EVENT_CLICKED) return;
+
+    txt_log[0] = '\0';
+    lv_label_set_static_text(label, txt_log);   /*Refresh the text*/
+}
+
+/**
+ * Called when the window's close button is clicked
+ * @param btn pointer to the close button
+ * @return LV_ACTION_RES_INV because the button is deleted in the function
+ */
+static void win_close_action(lv_obj_t * btn, lv_event_t event)
+{
+    (void) btn;    /*Unused*/
+
+    if(event != LV_EVENT_CLICKED) return;
+
+    lv_obj_del(win);
+    win = NULL;
+}
+
+#endif /*LV_USE_TERMINAL*/

components/gui/LittlevGL/3rdparty/lv_examples/lv_apps/terminal/terminal.h

@@ -0,0 +1,60 @@
+/**
+ * @file terminal.h
+ *
+ */
+
+#ifndef TERMINAL_H
+#define TERMINAL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#ifdef LV_CONF_INCLUDE_SIMPLE
+#include "lvgl.h"
+#include "lv_ex_conf.h"
+#else
+#include "../../../lvgl/lvgl.h"
+#include "../../../lv_ex_conf.h"
+#endif
+
+#if LV_USE_DEMO
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+/**
+ * Open a terminal
+ * @return pointer to the terminal window
+ */
+lv_obj_t * terminal_create(void);
+
+/**
+ * Add data to the terminal
+ * @param txt_in character sting to add to the terminal
+ */
+void terminal_add(const char * txt_in);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#endif /*LV_USE_TERMINAL*/
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* LV_TERMINAL_H */

components/gui/LittlevGL/3rdparty/lv_examples/lv_apps/terminal/terminal.mk

@@ -0,0 +1,6 @@
+CSRCS += terminal.c
+
+DEPPATH += --dep-path $(LVGL_DIR)/lv_examples/lv_apps/terminal
+VPATH += :$(LVGL_DIR)/lv_examples/lv_apps/terminal
+
+CFLAGS += "-I$(LVGL_DIR)/lv_examples/lv_apps/terminal"