B4R Question LVGL Library

astronald · Jan 8, 2023

Has anyone run this library?
Does the wrapper exists?

I try with arduino inline c code but not success.

Thanks for your help
Ronald Camacho.

candide · Jan 9, 2023

do you have a link ?

astronald · Jan 10, 2023

LVGL — Light and Versatile Embedded Graphics Library

LVGL is the most popular free and open source embedded graphics library targeting any MCU, MPU and display type to build beautiful UIs. We also do services like UI design, implementation and consulting.

lvgl.io

candide · Jan 10, 2023

this library, it is 72 widgets and each widget have multiples h files ans each h file need a wrapper ! ! !

not sure a global wrapper can be done . . .

astronald · Jan 10, 2023

Thanks very much, really library is very useful,
I'll keep trying with Inline code.

astronald · Jan 16, 2023

With this code in Arduino IDE It works properly,

Arduino:

#include <Arduino_GFX_Library.h>
#include <lvgl.h>
#include <demos/lv_demos.h>
#include <Wire.h>
#include <TAMC_GT911.h>

#define TOUCH_GT911
#define TOUCH_GT911_SCL 20
#define TOUCH_GT911_SDA 19
#define TOUCH_GT911_INT -1
#define TOUCH_GT911_RST 38
#define TOUCH_GT911_ROTATION ROTATION_NORMAL
#define TOUCH_MAP_X1 480
#define TOUCH_MAP_X2 0
#define TOUCH_MAP_Y1 272
#define TOUCH_MAP_Y2 0
#define TFT_BL 2
#define GFX_BL DF_GFX_BL

static uint32_t screenWidth;
static uint32_t screenHeight;
static lv_disp_draw_buf_t draw_buf;
static lv_color_t *disp_draw_buf;
static lv_disp_drv_t disp_drv;


int touch_last_x = 0, touch_last_y = 0;
TAMC_GT911 ts = TAMC_GT911(TOUCH_GT911_SDA, TOUCH_GT911_SCL, TOUCH_GT911_INT, TOUCH_GT911_RST, max(TOUCH_MAP_X1, TOUCH_MAP_X2), max(TOUCH_MAP_Y1, TOUCH_MAP_Y2));
Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(GFX_NOT_DEFINED, GFX_NOT_DEFINED, GFX_NOT_DEFINED, 40, 41, 39, 42, 45, 48, 47, 21, 14, 5, 6, 7, 15, 16, 4, 8, 3, 46, 9, 1);
Arduino_RPi_DPI_RGBPanel *gfx = new Arduino_RPi_DPI_RGBPanel( bus, 800, 0, 8, 4, 8, 480, 0, 8, 4, 8, 1, 16000000, true);

void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
  uint32_t w = (area->x2 - area->x1 + 1);
  uint32_t h = (area->y2 - area->y1 + 1);
  gfx->draw16bitRGBBitmap(area->x1, area->y1, (uint16_t *)&color_p->full, w, h);
  lv_disp_flush_ready(disp);
}

void my_touchpad_read(lv_indev_drv_t *indev_driver, lv_indev_data_t *data)
{
  if (touch_has_signal())
  {
    if (touch_touched())
    {
      data->state = LV_INDEV_STATE_PR;
      data->point.x = touch_last_x;
      data->point.y = touch_last_y;
    }
    else if (touch_released())
    {
      data->state = LV_INDEV_STATE_REL;
    }
  }
  else
  {
    data->state = LV_INDEV_STATE_REL;
  }
}

void touch_init()
{
  Wire.begin(TOUCH_GT911_SDA, TOUCH_GT911_SCL);
  ts.begin();
  ts.setRotation(TOUCH_GT911_ROTATION);
}

bool touch_has_signal()
{
  return true;
}

bool touch_touched()
{
  ts.read();
  if (ts.isTouched)
  {
    touch_last_x = map(ts.points[0].x, TOUCH_MAP_X1, TOUCH_MAP_X2, 0, gfx->width() - 1);
    touch_last_y = map(ts.points[0].y, TOUCH_MAP_Y1, TOUCH_MAP_Y2, 0, gfx->height() - 1);
    return true;
  }
  else
  {
    return false;
  }
}

bool touch_released()
{
  return true;
}

void setup()
{
  gfx->begin();
  pinMode(TFT_BL, OUTPUT);
  digitalWrite(TFT_BL, HIGH);
  gfx->fillScreen(RED);
  delay(500);
  gfx->fillScreen(GREEN);
  delay(500);
  gfx->fillScreen(BLUE);
  delay(500);
  gfx->fillScreen(BLACK);
  delay(500);
  lv_init();
  delay(10);
  touch_init();
  screenWidth = gfx->width();
  screenHeight = gfx->height();
  disp_draw_buf = (lv_color_t *)heap_caps_malloc(sizeof(lv_color_t) * screenWidth * screenHeight/4 , MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
  if (disp_draw_buf)
  {
    lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, NULL, screenWidth * screenHeight/4);
    lv_disp_drv_init(&disp_drv);
    disp_drv.hor_res = screenWidth;
    disp_drv.ver_res = screenHeight;
    disp_drv.flush_cb = my_disp_flush;
    disp_drv.draw_buf = &draw_buf;
    lv_disp_drv_register(&disp_drv);
    static lv_indev_drv_t indev_drv;
    lv_indev_drv_init(&indev_drv);
    indev_drv.type = LV_INDEV_TYPE_POINTER;
    indev_drv.read_cb = my_touchpad_read;
    lv_indev_drv_register(&indev_drv);
    lv_demo_widgets();
  }
 
}

void loop() {
  lv_timer_handler(); /* let the GUI do its work */
  delay(5);
}

but when trying to move to B4r

B4R:

Sub Process_Globals
    Public Serial1 As Serial
End Sub

Private Sub AppStart
    Serial1.Initialize(115200)
    RunNative("init", Null) 
    Log("AppStart")

End Sub


#IF C
#include <Arduino_GFX_Library.h>
#include <lvgl.h>
#include <demos/lv_demos.h>
#include <Wire.h>
#include <TAMC_GT911.h>

#define TOUCH_GT911
#define TOUCH_GT911_SCL 20
#define TOUCH_GT911_SDA 19
#define TOUCH_GT911_INT -1
#define TOUCH_GT911_RST 38
#define TOUCH_GT911_ROTATION ROTATION_NORMAL
#define TOUCH_MAP_X1 480
#define TOUCH_MAP_X2 0
#define TOUCH_MAP_Y1 272
#define TOUCH_MAP_Y2 0
#define TFT_BL 2
#define GFX_BL DF_GFX_BL

static uint32_t screenWidth;
static uint32_t screenHeight;
static lv_disp_draw_buf_t draw_buf;
static lv_color_t *disp_draw_buf;
static lv_disp_drv_t disp_drv;

int touch_last_x = 0, touch_last_y = 0;
TAMC_GT911 ts = TAMC_GT911(TOUCH_GT911_SDA, TOUCH_GT911_SCL, TOUCH_GT911_INT, TOUCH_GT911_RST, max(TOUCH_MAP_X1, TOUCH_MAP_X2), max(TOUCH_MAP_Y1, TOUCH_MAP_Y2));
Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(GFX_NOT_DEFINED, GFX_NOT_DEFINED, GFX_NOT_DEFINED, 40, 41, 39, 42, 45, 48, 47, 21, 14, 5, 6, 7, 15, 16, 4, 8, 3, 46, 9, 1);
Arduino_RPi_DPI_RGBPanel *gfx = new Arduino_RPi_DPI_RGBPanel( bus, 800, 0, 8, 4, 8, 480, 0, 8, 4, 8, 1, 16000000, true);

void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
  uint32_t w = (area->x2 - area->x1 + 1);
  uint32_t h = (area->y2 - area->y1 + 1);
  gfx->draw16bitRGBBitmap(area->x1, area->y1, (uint16_t *)&color_p->full, w, h);
  lv_disp_flush_ready(disp);
}

void my_touchpad_read(lv_indev_drv_t *indev_driver, lv_indev_data_t *data)
{
  if (touch_has_signal())
  {
    if (touch_touched())
    {
      data->state = LV_INDEV_STATE_PR;
      data->point.x = touch_last_x;
      data->point.y = touch_last_y;
    }
    else if (touch_released())
    {
      data->state = LV_INDEV_STATE_REL;
    }
  }
  else
  {
    data->state = LV_INDEV_STATE_REL;
  }
}

void touch_init()
{
  Wire.begin(TOUCH_GT911_SDA, TOUCH_GT911_SCL);
  ts.begin();
  ts.setRotation(TOUCH_GT911_ROTATION);
}

bool touch_has_signal()
{
  return true;
}

bool touch_touched()
{
  ts.read();
  if (ts.isTouched)
  {
    touch_last_x = map(ts.points[0].x, TOUCH_MAP_X1, TOUCH_MAP_X2, 0, gfx->width() - 1);
    touch_last_y = map(ts.points[0].y, TOUCH_MAP_Y1, TOUCH_MAP_Y2, 0, gfx->height() - 1);
    return true;
  }
  else
  {
    return false;
  }
}

bool touch_released()
{
  return true;
}

void init(B4R::Object* unused)
{
  gfx->begin();
  pinMode(TFT_BL, OUTPUT);
  digitalWrite(TFT_BL, HIGH);
  gfx->fillScreen(RED);
  delay(500);
  gfx->fillScreen(GREEN);
  delay(500);
  gfx->fillScreen(BLUE);
  delay(500);
  gfx->fillScreen(BLACK);
  delay(500);
  lv_init();
  delay(10);
  touch_init();
  screenWidth = gfx->width();
  screenHeight = gfx->height();
  disp_draw_buf = (lv_color_t *)heap_caps_malloc(sizeof(lv_color_t) * screenWidth * screenHeight/4 , MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
  if (disp_draw_buf)
  {
    lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, NULL, screenWidth * screenHeight/4);
    lv_disp_drv_init(&disp_drv);
    disp_drv.hor_res = screenWidth;
    disp_drv.ver_res = screenHeight;
    disp_drv.flush_cb = my_disp_flush;
    disp_drv.draw_buf = &draw_buf;
    lv_disp_drv_register(&disp_drv);
    static lv_indev_drv_t indev_drv;
    lv_indev_drv_init(&indev_drv);
    indev_drv.type = LV_INDEV_TYPE_POINTER;
    indev_drv.read_cb = my_touchpad_read;
    lv_indev_drv_register(&indev_drv);
    lv_demo_widgets();
  }
 
}
#End If

i get this error:

B4R Error:

C:\Users\corre\OneDrive\ESCRIT~1\PRUEBA~1\Objects\src\b4r_main.cpp: In function 'void my_touchpad_read(lv_indev_drv_t*, lv_indev_data_t*)':
b4r_main.cpp:47:7: error: 'touch_has_signal' was not declared in this scope
   if (touch_has_signal())
       ^~~~~~~~~~~~~~~~
C:\Users\corre\OneDrive\ESCRIT~1\PRUEBA~1\Objects\src\b4r_main.cpp:47:7: note: suggested alternative: 'touch_last_y'
   if (touch_has_signal())
       ^~~~~~~~~~~~~~~~
       touch_last_y
b4r_main.cpp:49:9: error: 'touch_touched' was not declared in this scope
     if (touch_touched())
         ^~~~~~~~~~~~~
C:\Users\corre\OneDrive\ESCRIT~1\PRUEBA~1\Objects\src\b4r_main.cpp:49:9: note: suggested alternative: 'touchSetCycles'
     if (touch_touched())
         ^~~~~~~~~~~~~
         touchSetCycles
b4r_main.cpp:55:14: error: 'touch_released' was not declared in this scope
     else if (touch_released())
              ^~~~~~~~~~~~~~
C:\Users\corre\OneDrive\ESCRIT~1\PRUEBA~1\Objects\src\b4r_main.cpp:55:14: note: suggested alternative: '_lock_release'
     else if (touch_released())
              ^~~~~~~~~~~~~~
              _lock_release
exit status 1

I can´t see error,
I appreciate any help!

astronald · Jan 16, 2023

I can solve changing call order subs

Thanks.

Digitek · Jul 9, 2023

astronald said:
I can solve changing call order subs

Greetings.
Could you please upload your corrected code?
Thank you.

B4R Question LVGL Library

astronald

Active Member

candide

Active Member

astronald

Active Member

LVGL — Light and Versatile Embedded Graphics Library

candide

Active Member

astronald

Active Member

astronald

Active Member

astronald

Active Member

Digitek

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