dsx2016/btntest
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Fix tactile switch wiring: GPIO22 to GND, show live pin level.

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Clarify 4-pin foot pairing and debounce for bare pushbutton.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
DESKTOP-PUHFO60\dsx2016
2026-10-23 12:46:31 +08:00
parent 2d1d49c038
commit 280c5ea97c
8 changed files with 94 additions and 60 deletions
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66
src/button.cpp
View File

@@ -3,46 +3,56 @@
#include <Arduino.h>
// 轻触开关：一端 → GPIO22，另一端 → GND（内部上拉，按下=LOW）
static uint32_t g_count = 0;
static bool g_stable_down = false;
static bool g_last_raw = false;
static uint32_t g_last_change_ms = 0;
static constexpr uint32_t DEBOUNCE_MS = 40;
static int g_stable_raw = HIGH;
static uint32_t g_change_ms = 0;
static int g_pending_raw = HIGH;
static bool g_pending = false;
static constexpr uint32_t DEBOUNCE_MS = 25;
void button_init() {
pinMode(BTN_PIN, INPUT_PULLUP);
delay(5);
g_count = 0;
g_stable_down = false;
g_last_raw = (digitalRead(BTN_PIN) == LOW);
g_last_change_ms = millis();
Serial.printf("Button GPIO%d INPUT_PULLUP (press=LOW)\n", BTN_PIN);
g_stable_raw = digitalRead(BTN_PIN);
g_stable_down = (g_stable_raw == LOW);
g_pending = false;
g_pending_raw = g_stable_raw;
g_change_ms = millis();
Serial.printf("Button tactile GPIO%d pullup, idle=%s (wire other side to GND)\n",
BTN_PIN, g_stable_raw == HIGH ? "HIGH" : "LOW");
}
bool button_poll_press() {
const bool raw_down = (digitalRead(BTN_PIN) == LOW);
const int raw = digitalRead(BTN_PIN);
const uint32_t now = millis();
if (raw_down != g_last_raw) {
g_last_raw = raw_down;
g_last_change_ms = now;
if (raw != g_stable_raw) {
if (!g_pending || raw != g_pending_raw) {
g_pending = true;
g_pending_raw = raw;
g_change_ms = now;
} else if ((now - g_change_ms) >= DEBOUNCE_MS) {
g_stable_raw = g_pending_raw;
g_pending = false;
const bool down = (g_stable_raw == LOW);
if (down && !g_stable_down) {
g_stable_down = true;
g_count++;
Serial.printf("Button press count=%lu raw=%d\n", (unsigned long)g_count,
g_stable_raw);
return true;
}
g_stable_down = down;
}
} else {
g_pending = false;
}
if ((now - g_last_change_ms) < DEBOUNCE_MS) {
return false;
}
if (raw_down == g_stable_down) {
return false;
}
g_stable_down = raw_down;
if (!g_stable_down) {
return false; // 只计按下边沿
}
g_count++;
Serial.printf("Button press count=%lu\n", (unsigned long)g_count);
return true;
return false;
}
uint32_t button_count() { return g_count; }
@@ -53,3 +63,5 @@ void button_reset_count() {
}
bool button_is_down() { return g_stable_down; }
int button_raw_level() { return digitalRead(BTN_PIN); }

20
src/main.cpp
View File

@@ -14,7 +14,7 @@ void setup() {
Serial.begin(460800);
delay(200);
Serial.println();
Serial.printf("LVGL %d.%d.%d | Button sensor GPIO%d\n", lv_version_major(),
Serial.printf("LVGL %d.%d.%d | Tactile button GPIO%d\n", lv_version_major(),
lv_version_minor(), lv_version_patch(), BTN_PIN);
Serial.println("BOOT_OK");
@@ -39,16 +39,16 @@ void setup() {
}
void loop() {
if (button_poll_press()) {
const bool pressed = button_poll_press();
static bool last_down = false;
static int last_raw = -1;
const bool down = button_is_down();
const int raw = button_raw_level();
if (pressed || down != last_down || raw != last_raw) {
last_down = down;
last_raw = raw;
ui_refresh_count();
} else {
// 按下/松开时刷新状态字，但不重复计数
static bool last_down = false;
const bool down = button_is_down();
if (down != last_down) {
last_down = down;
ui_refresh_count();
}
}
lv_timer_handler();

29
src/ui.cpp
View File

@@ -17,6 +17,7 @@ static lv_obj_t *lbl_pin;
static lv_obj_t *lbl_count;
static lv_obj_t *lbl_hint;
static lv_obj_t *lbl_state;
static lv_obj_t *lbl_raw;
static lv_obj_t *btn_reset;
static lv_obj_t *lbl_reset;
@@ -39,6 +40,12 @@ void ui_refresh_count() {
lv_obj_set_style_text_color(lbl_state,
lv_color_hex(down ? 0x3DDC97 : COL_MUTED), 0);
}
if (lbl_raw) {
const int lv = button_raw_level();
lv_label_set_text_fmt(lbl_raw, "GPIO%d: %s", BTN_PIN, lv ? "HIGH" : "LOW");
lv_obj_set_style_text_color(lbl_raw,
lv_color_hex(lv ? COL_MUTED : 0x3DDC97), 0);
}
}
static void on_reset(lv_event_t *e) {
@@ -58,35 +65,41 @@ void ui_create() {
lv_label_set_text(lbl_title, "Button");
lv_obj_set_style_text_color(lbl_title, lv_color_hex(COL_INK), 0);
lv_obj_set_style_text_font(lbl_title, &lv_font_montserrat_28, 0);
lv_obj_align(lbl_title, LV_ALIGN_TOP_MID, 0, 6);
lv_obj_align(lbl_title, LV_ALIGN_TOP_MID, 0, 4);
lbl_pin = lv_label_create(scr);
lv_label_set_text_fmt(lbl_pin, "SIG -> GPIO%d (press +1)", BTN_PIN);
lv_label_set_text_fmt(lbl_pin, "IO%d <-> switch <-> GND", BTN_PIN);
lv_obj_set_style_text_color(lbl_pin, lv_color_hex(COL_MUTED), 0);
lv_obj_set_style_text_font(lbl_pin, &lv_font_montserrat_14, 0);
lv_obj_align(lbl_pin, LV_ALIGN_TOP_MID, 0, 40);
lv_obj_align(lbl_pin, LV_ALIGN_TOP_MID, 0, 36);
lbl_count = lv_label_create(scr);
lv_label_set_text(lbl_count, "0");
lv_obj_set_style_text_color(lbl_count, lv_color_hex(COL_ACCENT), 0);
lv_obj_set_style_text_font(lbl_count, &lv_font_montserrat_28, 0);
lv_obj_align(lbl_count, LV_ALIGN_TOP_MID, 0, 78);
lv_obj_align(lbl_count, LV_ALIGN_TOP_MID, 0, 68);
lbl_hint = lv_label_create(scr);
lv_label_set_text(lbl_hint, "count");
lv_obj_set_style_text_color(lbl_hint, lv_color_hex(COL_MUTED), 0);
lv_obj_set_style_text_font(lbl_hint, &lv_font_montserrat_14, 0);
lv_obj_align(lbl_hint, LV_ALIGN_TOP_MID, 0, 116);
lv_obj_align(lbl_hint, LV_ALIGN_TOP_MID, 0, 104);
lbl_state = lv_label_create(scr);
lv_label_set_text(lbl_state, "IDLE");
lv_obj_set_style_text_color(lbl_state, lv_color_hex(COL_MUTED), 0);
lv_obj_set_style_text_font(lbl_state, &lv_font_montserrat_20, 0);
lv_obj_align(lbl_state, LV_ALIGN_TOP_MID, 0, 142);
lv_obj_align(lbl_state, LV_ALIGN_TOP_MID, 0, 126);
lbl_raw = lv_label_create(scr);
lv_label_set_text(lbl_raw, "GPIO22: HIGH");
lv_obj_set_style_text_color(lbl_raw, lv_color_hex(COL_MUTED), 0);
lv_obj_set_style_text_font(lbl_raw, &lv_font_montserrat_14, 0);
lv_obj_align(lbl_raw, LV_ALIGN_TOP_MID, 0, 152);
btn_reset = lv_button_create(scr);
lv_obj_set_size(btn_reset, UI_HOR_RES - 48, 48);
lv_obj_align(btn_reset, LV_ALIGN_TOP_MID, 0, 180);
lv_obj_set_size(btn_reset, UI_HOR_RES - 48, 44);
lv_obj_align(btn_reset, LV_ALIGN_TOP_MID, 0, 184);
style_btn(btn_reset, COL_BTN);
lv_obj_add_event_cb(btn_reset, on_reset, LV_EVENT_CLICKED, nullptr);
lbl_reset = lv_label_create(btn_reset);