Init

button.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2017-2024 Oleg Borodin <onborodin@gmail.com>
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <avr/io.h>
+
+#include <button.h>
+#include <tool.h>
+
+static bool button_is_pressed(button_t *button);
+
+void button_init(button_t *button, uintptr_t ddraddr, uintptr_t portaddr, uintptr_t pinaddr, uint8_t outnum) {
+    button->ddraddr = ddraddr;
+    button->portaddr = portaddr;
+    button->pinaddr = pinaddr;
+    button->outnum = outnum;
+}
+
+void button_setup(button_t *button) {
+    REG_SETDOWN_BIT(_MMIO_BYTE(button->ddraddr), button->outnum);
+    REG_SETUP_BIT(_MMIO_BYTE(button->portaddr), button->outnum);
+}
+
+static bool button_is_pressed(button_t *button) {
+    if (REG_BIT_VALUE(_MMIO_BYTE(button->pinaddr), button->outnum)) {
+        return true;
+    }
+    return false;
+}
+
+bool button_was_pressed(button_t *button) {
+    bool was_pressed = button->was_pressed;
+    if (was_pressed) {
+        button->was_pressed = false;
+        button->push_time = 0;
+    }
+    return was_pressed;
+}
+
+void button_reset(button_t *button) {
+    button->was_pressed = false;
+    button->push_time = 0;
+}
+
+#define BUTTON_PRESS_TIME 30
+
+void button_handle(button_t *button) {
+    if (button_is_pressed(button)) {
+        button->push_time++;
+    }
+    if (button->push_time > BUTTON_PRESS_TIME) {
+        button->was_pressed = true;
+    }
+}