acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
LVGL_Arduino.ino (3867B)
      1 #include <lvgl.h>
      2 #include <TFT_eSPI.h>
      3 /*If you want to use the LVGL examples,
      4   make sure to install the lv_examples Arduino library
      5   and uncomment the following line.
      6 #include <lv_examples.h>
      7 */
      8 
      9 #include <lv_demo.h>
     10 
     11 /*Change to your screen resolution*/
     12 static const uint16_t screenWidth  = 480;
     13 static const uint16_t screenHeight = 320;
     14 
     15 static lv_disp_draw_buf_t draw_buf;
     16 static lv_color_t buf[ screenWidth * 10 ];
     17 
     18 TFT_eSPI tft = TFT_eSPI(screenWidth, screenHeight); /* TFT instance */
     19 
     20 #if LV_USE_LOG != 0
     21 /* Serial debugging */
     22 void my_print(const char * buf)
     23 {
     24     Serial.printf(buf);
     25     Serial.flush();
     26 }
     27 #endif
     28 
     29 /* Display flushing */
     30 void my_disp_flush( lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p )
     31 {
     32     uint32_t w = ( area->x2 - area->x1 + 1 );
     33     uint32_t h = ( area->y2 - area->y1 + 1 );
     34 
     35     tft.startWrite();
     36     tft.setAddrWindow( area->x1, area->y1, w, h );
     37     tft.pushColors( ( uint16_t * )&color_p->full, w * h, true );
     38     tft.endWrite();
     39 
     40     lv_disp_flush_ready( disp );
     41 }
     42 
     43 /*Read the touchpad*/
     44 void my_touchpad_read( lv_indev_drv_t * indev_driver, lv_indev_data_t * data )
     45 {
     46     uint16_t touchX, touchY;
     47 
     48     bool touched = tft.getTouch( &touchX, &touchY, 600 );
     49 
     50     if( !touched )
     51     {
     52         data->state = LV_INDEV_STATE_REL;
     53     }
     54     else
     55     {
     56         data->state = LV_INDEV_STATE_PR;
     57 
     58         /*Set the coordinates*/
     59         data->point.x = touchX;
     60         data->point.y = touchY;
     61 
     62         Serial.print( "Data x " );
     63         Serial.println( touchX );
     64 
     65         Serial.print( "Data y " );
     66         Serial.println( touchY );
     67     }
     68 }
     69 
     70 void setup()
     71 {
     72     Serial.begin( 115200 ); /* prepare for possible serial debug */
     73 
     74     String LVGL_Arduino = "Hello Arduino! ";
     75     LVGL_Arduino += String('V') + lv_version_major() + "." + lv_version_minor() + "." + lv_version_patch();
     76 
     77     Serial.println( LVGL_Arduino );
     78     Serial.println( "I am LVGL_Arduino" );
     79 
     80     lv_init();
     81 
     82 #if LV_USE_LOG != 0
     83     lv_log_register_print_cb( my_print ); /* register print function for debugging */
     84 #endif
     85 
     86     tft.begin();          /* TFT init */
     87     tft.setRotation( 3 ); /* Landscape orientation, flipped */
     88 
     89     /*Set the touchscreen calibration data,
     90      the actual data for your display can be acquired using
     91      the Generic -> Touch_calibrate example from the TFT_eSPI library*/
     92     uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
     93     tft.setTouch( calData );
     94 
     95     lv_disp_draw_buf_init( &draw_buf, buf, NULL, screenWidth * 10 );
     96 
     97     /*Initialize the display*/
     98     static lv_disp_drv_t disp_drv;
     99     lv_disp_drv_init( &disp_drv );
    100     /*Change the following line to your display resolution*/
    101     disp_drv.hor_res = screenWidth;
    102     disp_drv.ver_res = screenHeight;
    103     disp_drv.flush_cb = my_disp_flush;
    104     disp_drv.draw_buf = &draw_buf;
    105     lv_disp_drv_register( &disp_drv );
    106 
    107     /*Initialize the (dummy) input device driver*/
    108     static lv_indev_drv_t indev_drv;
    109     lv_indev_drv_init( &indev_drv );
    110     indev_drv.type = LV_INDEV_TYPE_POINTER;
    111     indev_drv.read_cb = my_touchpad_read;
    112     lv_indev_drv_register( &indev_drv );
    113 
    114 #if 0
    115     /* Create simple label */
    116     lv_obj_t *label = lv_label_create( lv_scr_act() );
    117     lv_label_set_text( label, LVGL_Arduino.c_str() );
    118     lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );
    119 #else
    120     /* Try an example from the lv_examples Arduino library
    121        make sure to include it as written above.
    122     lv_example_btn_1();
    123    */
    124 
    125     // uncomment one of these demos
    126     lv_demo_widgets();            // OK
    127     // lv_demo_benchmark();          // OK
    128     // lv_demo_keypad_encoder();     // works, but I haven't an encoder
    129     // lv_demo_music();              // NOK
    130     // lv_demo_printer();
    131     // lv_demo_stress();             // seems to be OK
    132 #endif
    133     Serial.println( "Setup done" );
    134 }
    135 
    136 void loop()
    137 {
    138     lv_timer_handler(); /* let the GUI do its work */
    139     delay( 5 );
    140 }