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Add the 74HC595 Snake game project

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This commit is contained in:
Andrew Kesterson
2026-06-12 12:40:08 -04:00
parent 200156c432
commit f0561b449a
26 changed files with 1009 additions and 0 deletions
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64
08-74HC595-Snake/controls.cpp Normal file
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#include <Arduino.h>
#include <stddef.h>
#include <stdint.h>
#include "controls.h"
#include "error.h"
// For initializing simple buttons
int initButton(Button *button)
{
pinMode(button->pin, INPUT);
return ERRNO_SUCCESS;
}
// Read the state of a given button
int readButton(Button *button)
{
uint32_t pinvalue;
uint32_t curmillis;
uint32_t buttonvalue;
if ( button == NULL ) {
ERROR(ERRNO_NULLPOINTER);
}
curmillis = millis();
buttonvalue = digitalRead(button->pin);
if ( (button->state & BUTTON_STATE_BOUNCING) == BUTTON_STATE_BOUNCING ) {
if ( (curmillis - button->debounce_start_time) >= button->debouncetime ) {
if ( buttonvalue == button->pressedvalue ) {
button->state = BUTTON_STATE_DOWN;
} else {
button->state = BUTTON_STATE_UP;
}
Serial.printf("Button on pin %d has debounced state %d\n", button->pin, button->state);
button->debounce_start_time = 0;
return ERRNO_SUCCESS;
}
return ERRNO_SUCCESS;
}
if ( buttonvalue != button->pressedvalue && (
(button->state & BUTTON_STATE_DOWN) == BUTTON_STATE_DOWN ||
(button->state & BUTTON_STATE_HELD) == BUTTON_STATE_HELD)){
// We are beginning to release. Debounce.
Serial.printf("Debouncing button on pin %d for release\n", button->pin);
button->state = button->state | BUTTON_STATE_BOUNCING;
button->debounce_start_time = curmillis;
}
if ( buttonvalue == button->pressedvalue && (
(button->state & BUTTON_STATE_DOWN) != BUTTON_STATE_DOWN &&
(button->state & BUTTON_STATE_HELD) != BUTTON_STATE_HELD)){
// We are beginning to press. Debounce.
Serial.printf("Debouncing button on pin %d for press\n", button->pin);
button->state = button->state | BUTTON_STATE_BOUNCING;
button->debounce_start_time = curmillis;
}
return ERRNO_SUCCESS;
}
uint32_t readDifficulty()
{
analogRead(PIN_DIFFICULTY);
delay(1);
uint32_t setting = analogRead(PIN_DIFFICULTY);
uint32_t divisor = 4096/9;
return setting/divisor;
}