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Adding a new folder for LVGL project
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Eric
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#include "SPIFFS.h"
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#include <lvgl.h>
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#include <Ticker.h>
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#include <TFT_eSPI.h>
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#define LVGL_TICK_PERIOD 60
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Ticker tick; /* timer for interrupt handler */
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TFT_eSPI tft = TFT_eSPI(); /* TFT instance */
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static lv_disp_buf_t disp_buf;
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static lv_color_t buf[LV_HOR_RES_MAX * 10];
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int screenWidth = 480;
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int screenHeight = 320;
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String currentFileName;
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/* Display flushing */
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void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
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{
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uint16_t c;
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tft.startWrite(); /* Start new TFT transaction */
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tft.setAddrWindow(area->x1, area->y1, (area->x2 - area->x1 + 1), (area->y2 - area->y1 + 1)); /* set the working window */
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for (int y = area->y1; y <= area->y2; y++) {
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for (int x = area->x1; x <= area->x2; x++) {
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c = color_p->full;
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tft.writeColor(c, 1);
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color_p++;
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}
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}
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tft.endWrite(); /* terminate TFT transaction */
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lv_disp_flush_ready(disp); /* tell lvgl that flushing is done */
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}
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bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data)
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{
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uint16_t touchX, touchY;
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bool touched = tft.getTouch(&touchX, &touchY, 600);
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if(!touched)
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{
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return false;
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}
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if(touchX>screenWidth || touchY > screenHeight)
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{
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Serial.println("Y or y outside of expected parameters..");
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Serial.print("y:");
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Serial.print(touchX);
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Serial.print(" x:");
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Serial.print(touchY);
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}
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else
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{
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data->state = touched ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL;
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/*Save the state and save the pressed coordinate*/
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//if(data->state == LV_INDEV_STATE_PR) touchpad_get_xy(&last_x, &last_y);
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/*Set the coordinates (if released use the last pressed coordinates)*/
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data->point.x = touchX;
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data->point.y = touchY;
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Serial.print("Data x");
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Serial.println(touchX);
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Serial.print("Data y");
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Serial.println(touchY);
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}
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return false; /*Return `false` because we are not buffering and no more data to read*/
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}
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/* Interrupt driven periodic handler */
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static void lv_tick_handler(void)
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{
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lv_tick_inc(LVGL_TICK_PERIOD);
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}
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void setup() {
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Serial.begin(115200); /* prepare for possible serial debug */
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lv_init();
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tft.begin(); /* TFT init */
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tft.setRotation(3);
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//uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
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uint16_t calData[5] = {299, 3588, 348, 3474, 1};
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tft.setTouch(calData);
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lv_disp_buf_init(&disp_buf, buf, NULL, LV_HOR_RES_MAX * 10);
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/*Initialize the display*/
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lv_disp_drv_t disp_drv;
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lv_disp_drv_init(&disp_drv);
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disp_drv.hor_res = screenWidth;
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disp_drv.ver_res = screenHeight;
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disp_drv.flush_cb = my_disp_flush;
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disp_drv.buffer = &disp_buf;
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lv_disp_drv_register(&disp_drv);
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lv_indev_drv_t indev_drv;
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lv_indev_drv_init(&indev_drv); /*Descriptor of a input device driver*/
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indev_drv.type = LV_INDEV_TYPE_POINTER; /*Touch pad is a pointer-like device*/
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indev_drv.read_cb = my_touchpad_read; /*Set your driver function*/
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lv_indev_drv_register(&indev_drv); /*Finally register the driver*/
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/*Initialize the graphics library's tick*/
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tick.attach_ms(LVGL_TICK_PERIOD, lv_tick_handler);
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if(initSPIFFS()){
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lv_main();
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} else {
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lv_error_page();
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}
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}
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void loop() {
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lv_task_handler(); /* let the GUI do its work */
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delay(5);
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}
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bool initSPIFFS(){
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if(!SPIFFS.begin(true)){
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return false;
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}
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return true;
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}
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String openFile(String filename){
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File file = SPIFFS.open(filename);
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if(!file){
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file.close();
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return "";
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}
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String textData;
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while(file.available()){
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textData += char(file.read());
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}
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Serial.println(textData);
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file.close();
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return textData;
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}
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bool writeFile(String filename, String contents){
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File file = SPIFFS.open(filename, FILE_WRITE);
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if(!file){
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file.close();
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return false;
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}
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if(file.print(contents)){
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file.close();
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return true;
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}
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file.close();
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return false;
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}
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static lv_obj_t *kb, *ta;
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static void lv_main(){
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lv_obj_t * scr = lv_cont_create(NULL, NULL);
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lv_disp_load_scr(scr);
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lv_obj_t * tv = lv_tabview_create(scr, NULL);
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lv_obj_set_size(tv, lv_disp_get_hor_res(NULL), lv_disp_get_ver_res(NULL));
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lv_obj_t * tab1 = lv_tabview_add_tab(tv, "LIST TAB");
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lv_obj_t * tab2 = lv_tabview_add_tab(tv, "WRITE TAB");
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create_tab1(tab1);
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create_tab2(tab2);
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}
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static void lv_error_page(){
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lv_obj_t * label = lv_label_create(lv_scr_act(), NULL);
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lv_label_set_text(label, "Please check your SPIFFS");
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lv_obj_align(label, NULL, LV_ALIGN_CENTER, 0,0);
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}
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static void create_tab1(lv_obj_t * parent){
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//List Tab
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lv_page_set_scrl_layout(parent, LV_LAYOUT_PRETTY);
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lv_obj_t * list = lv_list_create(parent, NULL);
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lv_obj_set_size(list, lv_obj_get_width(parent)-20, lv_obj_get_height(parent)-20);
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lv_obj_align(list, NULL, LV_ALIGN_IN_TOP_LEFT, 10, 10);
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lv_obj_t * btn = lv_list_add_btn(list, LV_SYMBOL_EDIT, "New");
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lv_obj_set_event_cb(btn, file_list_event);
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File root = SPIFFS.open("/");
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File file = root.openNextFile();
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while(file){
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lv_obj_t * btn = lv_list_add_btn(list, LV_SYMBOL_FILE, file.name());
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lv_obj_set_event_cb(btn, file_list_event);
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file = root.openNextFile();
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}
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}
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static void create_tab2(lv_obj_t * parent){
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//Write Tab
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ta = lv_ta_create(parent, NULL);
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lv_obj_set_size(ta, lv_obj_get_width(parent) - 10, lv_obj_get_height(parent) / 2);
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lv_ta_set_cursor_type(ta, LV_CURSOR_BLOCK);
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lv_ta_set_text(ta, "");
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/*Create a keyboard and apply the styles*/
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kb = lv_kb_create(parent, NULL);
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lv_obj_set_size(kb, lv_obj_get_width(parent) -10, lv_obj_get_height(parent) / 2 - 20);
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lv_obj_set_event_cb(kb, keyboard_event_cb);
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/*Assign the text area to the keyboard*/
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lv_kb_set_ta(kb, ta);
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}
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static void keyboard_event_cb(lv_obj_t * keyboard, lv_event_t event){
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lv_kb_def_event_cb(kb, event);
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if(event == LV_EVENT_APPLY){
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printf("LV_EVENT_APPLY\n");
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}else if(event == LV_EVENT_CANCEL){
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printf("LV_EVENT_CANCEL\n");
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}
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}
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static void file_list_event(lv_obj_t * btn, lv_event_t e){
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if(e == LV_EVENT_CLICKED){
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currentFileName = lv_list_get_btn_text(btn);
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Serial.println(currentFileName);
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if(strcmp(currentFileName.c_str(),"New") == 0){
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lv_ta_set_text(ta, "");
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}else{
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lv_ta_set_text(ta, openFile(currentFileName).c_str());
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}
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}
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}
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