DESKTOP-PUHFO60\dsx2016
280c5ea97c
Clarify 4-pin foot pairing and debounce for bare pushbutton. Co-authored-by: Cursor <cursoragent@cursor.com>
68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
#include "button.h"
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#include "pins.h"
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#include <Arduino.h>
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// 轻触开关：一端 → GPIO22，另一端 → GND（内部上拉，按下=LOW）
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static uint32_t g_count = 0;
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static bool g_stable_down = false;
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static int g_stable_raw = HIGH;
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static uint32_t g_change_ms = 0;
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static int g_pending_raw = HIGH;
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static bool g_pending = false;
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static constexpr uint32_t DEBOUNCE_MS = 25;
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void button_init() {
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pinMode(BTN_PIN, INPUT_PULLUP);
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delay(5);
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g_count = 0;
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g_stable_raw = digitalRead(BTN_PIN);
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g_stable_down = (g_stable_raw == LOW);
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g_pending = false;
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g_pending_raw = g_stable_raw;
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g_change_ms = millis();
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Serial.printf("Button tactile GPIO%d pullup, idle=%s (wire other side to GND)\n",
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BTN_PIN, g_stable_raw == HIGH ? "HIGH" : "LOW");
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}
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bool button_poll_press() {
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const int raw = digitalRead(BTN_PIN);
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const uint32_t now = millis();
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if (raw != g_stable_raw) {
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if (!g_pending || raw != g_pending_raw) {
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g_pending = true;
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g_pending_raw = raw;
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g_change_ms = now;
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} else if ((now - g_change_ms) >= DEBOUNCE_MS) {
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g_stable_raw = g_pending_raw;
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g_pending = false;
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const bool down = (g_stable_raw == LOW);
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if (down && !g_stable_down) {
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g_stable_down = true;
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g_count++;
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Serial.printf("Button press count=%lu raw=%d\n", (unsigned long)g_count,
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g_stable_raw);
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return true;
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}
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g_stable_down = down;
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}
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} else {
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g_pending = false;
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}
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return false;
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}
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uint32_t button_count() { return g_count; }
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void button_reset_count() {
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g_count = 0;
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Serial.println("Button count reset");
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}
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bool button_is_down() { return g_stable_down; }
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int button_raw_level() { return digitalRead(BTN_PIN); }
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