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examples/ESP32_TFT_eSPI_Slider/ESP32_TFT_eSPI_Slider.ino

@@ -1,91 +1,83 @@
-#include <lvgl.h>
-#include <Ticker.h>
-#include <TFT_eSPI.h>
-
-#define LVGL_TICK_PERIOD 60
-
-Ticker tick; /* timer for interrupt handler */
-TFT_eSPI tft = TFT_eSPI(); /* TFT instance */
-static lv_disp_buf_t disp_buf;
-static lv_color_t buf[LV_HOR_RES_MAX * 10];
-
-lv_obj_t * slider_label;
-int screenWidth = 480;
-int screenHeight = 320;
-
-#if USE_LV_LOG != 0
-/* Serial debugging */
-void my_print(lv_log_level_t level, const char * file, uint32_t line, const char * dsc)
-{
-
-  Serial.printf("%s@%d->%s\r\n", file, line, dsc);
-  delay(100);
-}
-#endif
-
-/* Display flushing */
-void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
-{
-  uint16_t c;
-
-  tft.startWrite(); /* Start new TFT transaction */
-  tft.setAddrWindow(area->x1, area->y1, (area->x2 - area->x1 + 1), (area->y2 - area->y1 + 1)); /* set the working window */
-  for (int y = area->y1; y <= area->y2; y++) {
-    for (int x = area->x1; x <= area->x2; x++) {
-      c = color_p->full;
-      tft.writeColor(c, 1);
-      color_p++;
-    }
-  }
-  tft.endWrite(); /* terminate TFT transaction */
-  lv_disp_flush_ready(disp); /* tell lvgl that flushing is done */
-}
-
-bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data)
-{
-    uint16_t touchX, touchY;
-
-    bool touched = tft.getTouch(&touchX, &touchY, 600);
-
-    if(!touched)
-    {
-      return false;
-    }
-
-    if(touchX>screenWidth || touchY > screenHeight)
-    {
-      Serial.println("Y or y outside of expected parameters..");
-      Serial.print("y:");
-      Serial.print(touchX);
-      Serial.print(" x:");
-      Serial.print(touchY);
-    }
-    else
-    {
-
-      data->state = touched ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL; 
-
-      /*Save the state and save the pressed coordinate*/
-      //if(data->state == LV_INDEV_STATE_PR) touchpad_get_xy(&last_x, &last_y);
-
-      /*Set the coordinates (if released use the last pressed coordinates)*/
-      data->point.x = touchX;
-      data->point.y = touchY;
-
-      Serial.print("Data x");
-      Serial.println(touchX);
-
-      Serial.print("Data y");
-      Serial.println(touchY);
-
-    }
-
-    return false; /*Return `false` because we are not buffering and no more data to read*/
-}
-
-/* Interrupt driven periodic handler */
-static void lv_tick_handler(void)
-{
-
-  lv_tick_inc(LVGL_TICK_PERIOD);
-}
+#include <lvgl.h>
+#include <TFT_eSPI.h>
+
+#define LVGL_TICK_PERIOD 60
+
+//Ticker tick; /* timer for interrupt handler */
+TFT_eSPI tft = TFT_eSPI(); /* TFT instance */
+static lv_disp_buf_t disp_buf;
+static lv_color_t buf[LV_HOR_RES_MAX * 10];
+
+lv_obj_t * slider_label;
+int screenWidth = 480;
+int screenHeight = 320;
+
+#if USE_LV_LOG != 0
+/* Serial debugging */
+void my_print(lv_log_level_t level, const char * file, uint32_t line, const char * dsc)
+{
+
+  Serial.printf("%s@%d->%s\r\n", file, line, dsc);
+  delay(100);
+}
+#endif
+
+/* Display flushing */
+void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
+{
+  uint16_t c;
+
+  tft.startWrite(); /* Start new TFT transaction */
+  tft.setAddrWindow(area->x1, area->y1, (area->x2 - area->x1 + 1), (area->y2 - area->y1 + 1)); /* set the working window */
+  for (int y = area->y1; y <= area->y2; y++) {
+    for (int x = area->x1; x <= area->x2; x++) {
+      c = color_p->full;
+      tft.writeColor(c, 1);
+      color_p++;
+    }
+  }
+  tft.endWrite(); /* terminate TFT transaction */
+  lv_disp_flush_ready(disp); /* tell lvgl that flushing is done */
+}
+
+bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data)
+{
+    uint16_t touchX, touchY;
+
+    bool touched = tft.getTouch(&touchX, &touchY, 600);
+
+    if(!touched)
+    {
+      return false;
+    }
+
+    if(touchX>screenWidth || touchY > screenHeight)
+    {
+      Serial.println("Y or y outside of expected parameters..");
+      Serial.print("y:");
+      Serial.print(touchX);
+      Serial.print(" x:");
+      Serial.print(touchY);
+    }
+    else
+    {
+
+      data->state = touched ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL; 
+
+      /*Save the state and save the pressed coordinate*/
+      //if(data->state == LV_INDEV_STATE_PR) touchpad_get_xy(&last_x, &last_y);
+
+      /*Set the coordinates (if released use the last pressed coordinates)*/
+      data->point.x = touchX;
+      data->point.y = touchY;
+
+      Serial.print("Data x");
+      Serial.println(touchX);
+
+      Serial.print("Data y");
+      Serial.println(touchY);
+
+    }
+
+    return false; /*Return `false` because we are not buffering and no more data to read*/
+}

examples/ESP32_TFT_eSPI_Slider/Setup.ino

@@ -1,72 +1,68 @@
-void setup() {
-
-  ledcSetup(10, 5000/*freq*/, 10 /*resolution*/);
-  ledcAttachPin(32, 10);
-  analogReadResolution(10);
-  ledcWrite(10,768);
-
-  Serial.begin(115200); /* prepare for possible serial debug */
-
-  lv_init();
-
-  #if USE_LV_LOG != 0
-    lv_log_register_print_cb(my_print); /* register print function for debugging */
-  #endif
-
-  tft.begin(); /* TFT init */
-  tft.setRotation(3);
-
-  uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
-  tft.setTouch(calData);
-
-  lv_disp_buf_init(&disp_buf, buf, NULL, LV_HOR_RES_MAX * 10);
-
-  /*Initialize the display*/
-  lv_disp_drv_t disp_drv;
-  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.buffer = &disp_buf;
-  lv_disp_drv_register(&disp_drv);
-
-  /*Initialize the input device driver*/
-  lv_indev_drv_t indev_drv;
-  lv_indev_drv_init(&indev_drv);             /*Descriptor of a input device driver*/
-  indev_drv.type = LV_INDEV_TYPE_POINTER;    /*Touch pad is a pointer-like device*/
-  indev_drv.read_cb = my_touchpad_read;      /*Set your driver function*/
-  lv_indev_drv_register(&indev_drv);         /*Finally register the driver*/
-
-  /*Initialize the graphics library's tick*/
-  tick.attach_ms(LVGL_TICK_PERIOD, lv_tick_handler);
-
-  //Set the theme..
-  lv_theme_t * th = lv_theme_night_init(210, NULL);     //Set a HUE value and a Font for the Night Theme
-  lv_theme_set_current(th);
-
-  lv_obj_t * scr = lv_cont_create(NULL, NULL);
-  lv_disp_load_scr(scr);
-
-  //lv_obj_t * tv = lv_tabview_create(scr, NULL);
-  //lv_obj_set_size(tv, lv_disp_get_hor_res(NULL), lv_disp_get_ver_res(NULL));
-
-  /* Create simple label */
-  lv_obj_t *label = lv_label_create(lv_scr_act(), NULL);
-  lv_label_set_text(label, "Hello Arduino! (V6.1)");
-  lv_obj_align(label, NULL, LV_ALIGN_CENTER, 0, -50);
-
-  /* Create a slider in the center of the display */
-  lv_obj_t * slider = lv_slider_create(lv_scr_act(), NULL);
-  lv_obj_set_width(slider, screenWidth-50);                        /*Set the width*/
-  lv_obj_set_height(slider, 50);
-  lv_obj_align(slider, NULL, LV_ALIGN_CENTER, 0, 0);    /*Align to the center of the parent (screen)*/
-  lv_obj_set_event_cb(slider, slider_event_cb);         /*Assign an event function*/
-
-  /* Create a label below the slider */
-  slider_label = lv_label_create(lv_scr_act(), NULL);
-  lv_label_set_text(slider_label, "0");
-  lv_obj_set_auto_realign(slider, true);
-  lv_obj_align(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
-
-}
-
+void setup() {
+
+  ledcSetup(10, 5000/*freq*/, 10 /*resolution*/);
+  ledcAttachPin(32, 10);
+  analogReadResolution(10);
+  ledcWrite(10,768);
+
+  Serial.begin(115200); /* prepare for possible serial debug */
+
+  lv_init();
+
+  #if USE_LV_LOG != 0
+    lv_log_register_print_cb(my_print); /* register print function for debugging */
+  #endif
+
+  tft.begin(); /* TFT init */
+  tft.setRotation(3);
+
+  uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
+  tft.setTouch(calData);
+
+  lv_disp_buf_init(&disp_buf, buf, NULL, LV_HOR_RES_MAX * 10);
+
+  /*Initialize the display*/
+  lv_disp_drv_t disp_drv;
+  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.buffer = &disp_buf;
+  lv_disp_drv_register(&disp_drv);
+
+  /*Initialize the input device driver*/
+  lv_indev_drv_t indev_drv;
+  lv_indev_drv_init(&indev_drv);             /*Descriptor of a input device driver*/
+  indev_drv.type = LV_INDEV_TYPE_POINTER;    /*Touch pad is a pointer-like device*/
+  indev_drv.read_cb = my_touchpad_read;      /*Set your driver function*/
+  lv_indev_drv_register(&indev_drv);         /*Finally register the driver*/
+
+  //Set the theme..
+  lv_theme_t * th = lv_theme_material_init(LV_THEME_DEFAULT_COLOR_PRIMARY, LV_THEME_DEFAULT_COLOR_SECONDARY, LV_THEME_DEFAULT_FLAG, LV_THEME_DEFAULT_FONT_SMALL , LV_THEME_DEFAULT_FONT_NORMAL, LV_THEME_DEFAULT_FONT_SUBTITLE, LV_THEME_DEFAULT_FONT_TITLE);     
+  lv_theme_set_act(th);
+
+  lv_obj_t * scr = lv_cont_create(NULL, NULL);
+  lv_disp_load_scr(scr);
+
+  //lv_obj_t * tv = lv_tabview_create(scr, NULL);
+  //lv_obj_set_size(tv, lv_disp_get_hor_res(NULL), lv_disp_get_ver_res(NULL));
+
+  /* Create simple label */
+  lv_obj_t *label = lv_label_create(lv_scr_act(), NULL);
+  lv_label_set_text(label, "Hello Arduino! (V7.0)");
+  lv_obj_align(label, NULL, LV_ALIGN_CENTER, 0, -50);
+
+  /* Create a slider in the center of the display */
+  lv_obj_t * slider = lv_slider_create(lv_scr_act(), NULL);
+  lv_obj_set_width(slider, screenWidth-50);                        /*Set the width*/
+  lv_obj_set_height(slider, 50);
+  lv_obj_align(slider, NULL, LV_ALIGN_CENTER, 0, 0);    /*Align to the center of the parent (screen)*/
+  lv_obj_set_event_cb(slider, slider_event_cb);         /*Assign an event function*/
+
+  /* Create a label below the slider */
+  slider_label = lv_label_create(lv_scr_act(), NULL);
+  lv_label_set_text(slider_label, "0");
+  lv_obj_set_auto_realign(slider, true);
+  lv_obj_align(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
+
+}

examples/STM32_TFT_eSPI_Slider/Readme.md

@@ -0,0 +1,25 @@
+Littlevgl on STM32F103C BluePill and ILI9341 in 8-Bit Parallel with XPT2046 Touch-pad on SPI2 port.
+Which able to dim an LED attached to PB6 Pin (thru 100to330 ohm series resistor from GND) by adjusting the slider.
+Library dependencies:
+1. TFT_eSPI https://github.com/Bodmer/TFT_eSPI
+  and choosing the right setup inside User_Setup_Select.h and also set right pins on selected user file.
+2.  TFT_eTouch.h    https://github.com/achillhasler/TFT_eTouch
+  and set the right pins inside TFT_eTouchUser.h and also run calibrate.ino to get the calibration value and store it inside
+  TFT_eTouchUser.h like ` #define TOUCH_DEFAULT_CALIBRATION { 294, 3913, 339, 3869, 2 }`
+  Note that TFT_eSPI touch include extension does nether support second SPI port nor touch in parallel mode. 
+3. Installing the last master Arduino_Core_STM32 on https://github.com/stm32duino/Arduino_Core_STM32
+  because the Hardwaretimer definitions changed a bit in 1.9.0 version which about to release.
+4. lv_arduino https://github.com/littlevgl/lv_arduino
+  and config the lv_conf.h eg: 
+  ```C++
+  #define LV_HOR_RES_MAX          (320)
+  #define LV_VER_RES_MAX          (240)
+  #define LV_USE_THEME_NIGHT      1   /*Dark elegant theme*/
+  #define LV_MEM_CUSTOM           1  // otherwise occupied 32k buffer of RAM
+  ```
+![Example](https://github.com/HamidSaffari/lv_arduino/blob/master/examples/STM32_TFT_eSPI_Slider/photo_2020-04-02_01-55-36.jpg)
+
+EDIT: Since lvgl updated to 7.0.1 the program no longer fits inside STM32F103CB so you have to go to larger like STM32F103RC.
+
+  Created by Hamid Saffari @ Apr 2020. https://github.com/HamidSaffari/
+  Released into the public domain.