dsx2016/btntest
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

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); }