Description
Button Event not triggering
What MCU/Processor/Board and compiler are you using?
Arduino GIGA/Adafruit RA8875/7" touchscreen
What do you want to achieve?
get simple program with button and textbox working
What have you tried so far?
Have a simple program that updates a textbox with a counter and a button that triggers an event.
The textbox counter works fine. Can’t get the button event to trigger when the button is touched. Have log turned on for use messages. I see the message I put in my_touch_read_cb when I touch the screen. The button event messages print out a handful of times when I start the app but after they never show up on button press.
Code to reproduce
Add the relevant code snippets here.
The code block(s) should be between ```c and ``` tags:
#include <Adafruit_RA8875.h>
#include <lvgl.h>
//#include "lv_conf.h"
#define RA8875_INT 3
#define RA8875_CS 10
#define RA8875_RESET 9
#define SCREEN_WIDTH 800
#define SCREEN_HEIGHT 480
uint16_t tx, ty;
Adafruit_RA8875 tft = Adafruit_RA8875(RA8875_CS, RA8875_RESET);
// Framebuffer: 40 lines for partial rendering
#define BUFFER_LINES 40
//static lv_color_t draw_buf1[SCREEN_WIDTH * BUFFER_LINES];
static lv_color_t draw_buf1[SCREEN_WIDTH * BUFFER_LINES];
static lv_draw_buf_t draw_buf;
static lv_display_t* disp;
lv_obj_t* TextBox;
int number = 0;
unsigned long previousMillis = 0;
const long interval = 100;
void log_print(lv_log_level_t level, const char * buf) {
LV_UNUSED(level);
Serial.println(buf);
Serial.flush();
}
// -------- LVGL DRAWING --------
void my_flush_cb(lv_display_t* disp_drv, const lv_area_t* area, uint8_t* px_map) {
lv_coord_t w = area->x2 - area->x1 + 1;
lv_coord_t h = area->y2 - area->y1 + 1;
tft.drawRGBBitmap(area->x1, area->y1, (uint16_t*)px_map, w, h);
lv_display_flush_ready(disp_drv);
}
// -------- LVGL TICK FUNCTION --------
static uint32_t my_tick_get_cb(void) {
return millis();
}
// -------- LVGL TOUCH DRIVER --------
static void my_touch_read_cb(lv_indev_t* indev, lv_indev_data_t* data) {
if (tft.touched()) {
LV_LOG_USER("Touched");
uint16_t x, y;
if (tft.touchRead(&x, &y)) {
data->point.x = x;
data->point.y = y;
data->state = LV_INDEV_STATE_PRESSED;
} else {
//data->state = LV_INDEV_STATE_RELEASED;
}
} else {
data->state = LV_INDEV_STATE_RELEASED;
}
}
// -------- BUTTON EVENT HANDLER --------
static void btn_event_cb(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
LV_LOG_USER("in event");
if(code == LV_EVENT_CLICKED) {
Serial.println("clicked");
LV_LOG_USER("Clicked");
}
else if(code == LV_EVENT_VALUE_CHANGED) {
LV_LOG_USER("Toggled");
}
}
void setup() {
Serial.begin(115200);
while (!Serial);
// Init display
if (!tft.begin(RA8875_800x480)) {
Serial.println("RA8875 init failed!");
while (1);
}
tft.displayOn(true);
tft.GPIOX(true);
tft.PWM1config(true, RA8875_PWM_CLK_DIV1024);
tft.PWM1out(255);
tft.touchEnable(true);
// Init LVGL
lv_init();
//lv_log_register_print_cb()
lv_log_register_print_cb(log_print);
lv_tick_set_cb(my_tick_get_cb);
lv_draw_buf_init(&draw_buf,
SCREEN_WIDTH,
BUFFER_LINES,
LV_COLOR_FORMAT_RGB565,
SCREEN_WIDTH * sizeof(lv_color_t),
draw_buf1,
sizeof(draw_buf1));
disp = lv_display_create(SCREEN_WIDTH, SCREEN_HEIGHT);
lv_display_set_flush_cb(disp, my_flush_cb);
lv_display_set_draw_buffers(disp, &draw_buf, NULL);
// Register touchscreen
lv_indev_t* indev_touch = lv_indev_create();
lv_indev_set_type(indev_touch, LV_INDEV_TYPE_POINTER);
lv_indev_set_read_cb(indev_touch, my_touch_read_cb);
// UI: Button
lv_obj_t* btn = lv_button_create(lv_screen_active());
lv_obj_set_size(btn, 120, 50);
//lv_obj_align(btn, LV_ALIGN_OUT_TOP_LEFT, 420, 10);
lv_obj_center(btn);
lv_obj_add_event_cb(btn, btn_event_cb, LV_EVENT_ALL, NULL);
lv_obj_t* label = lv_label_create(btn);
lv_label_set_text(label, "Button");
lv_obj_center(label);
// UI: Text Box
TextBox = lv_textarea_create(lv_screen_active());
lv_obj_set_size(TextBox, 100, 60);
lv_obj_align(TextBox, LV_ALIGN_OUT_TOP_LEFT, 100, 50);
lv_textarea_set_one_line(TextBox, true);
lv_obj_set_style_text_align(TextBox, LV_TEXT_ALIGN_CENTER, 0);
}
void loop() {
lv_task_handler(); // let the GUI do its work
//lv_tick_inc(5); // tell LVGL how much time has passed
lv_tick_inc(10);
delay(5); // let this time pass
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
previousMillis = currentMillis;
number = (number + 1) % 1000;
char buffer[8];
itoa(number, buffer, 10);
lv_textarea_set_text(TextBox, buffer);
}
float xScale = 1024.0F/tft.width();
float yScale = 1024.0F/tft.height();
if (! digitalRead(RA8875_INT))
{
// if (tft.touched())
// {
// Serial.println("Touch: ");
// tft.touchRead(&tx, &ty);
// Serial.print(tx); Serial.print(", "); Serial.println(ty);
// /* Draw a circle */
// tft.fillCircle((uint16_t)(tx/xScale), (uint16_t)(ty/yScale), 4, RA8875_WHITE);
// }
}
}
Screenshot and/or video
If possible, add screenshots and/or videos about the current state.
