65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
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#include <Arduino.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "controls.h"
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#include "error.h"
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// For initializing simple buttons
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int initButton(Button *button)
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{
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pinMode(button->pin, INPUT);
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return ERRNO_SUCCESS;
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}
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// Read the state of a given button
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int readButton(Button *button)
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{
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uint32_t pinvalue;
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uint32_t curmillis;
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uint32_t buttonvalue;
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if ( button == NULL ) {
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ERROR(ERRNO_NULLPOINTER);
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}
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curmillis = millis();
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buttonvalue = digitalRead(button->pin);
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if ( (button->state & BUTTON_STATE_BOUNCING) == BUTTON_STATE_BOUNCING ) {
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if ( (curmillis - button->debounce_start_time) >= button->debouncetime ) {
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if ( buttonvalue == button->pressedvalue ) {
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button->state = BUTTON_STATE_DOWN;
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} else {
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button->state = BUTTON_STATE_UP;
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}
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Serial.printf("Button on pin %d has debounced state %d\n", button->pin, button->state);
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button->debounce_start_time = 0;
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return ERRNO_SUCCESS;
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}
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return ERRNO_SUCCESS;
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}
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if ( buttonvalue != button->pressedvalue && (
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(button->state & BUTTON_STATE_DOWN) == BUTTON_STATE_DOWN ||
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(button->state & BUTTON_STATE_HELD) == BUTTON_STATE_HELD)){
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// We are beginning to release. Debounce.
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Serial.printf("Debouncing button on pin %d for release\n", button->pin);
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button->state = button->state | BUTTON_STATE_BOUNCING;
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button->debounce_start_time = curmillis;
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}
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if ( buttonvalue == button->pressedvalue && (
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(button->state & BUTTON_STATE_DOWN) != BUTTON_STATE_DOWN &&
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(button->state & BUTTON_STATE_HELD) != BUTTON_STATE_HELD)){
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// We are beginning to press. Debounce.
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Serial.printf("Debouncing button on pin %d for press\n", button->pin);
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button->state = button->state | BUTTON_STATE_BOUNCING;
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button->debounce_start_time = curmillis;
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}
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return ERRNO_SUCCESS;
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}
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uint32_t readDifficulty()
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{
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analogRead(PIN_DIFFICULTY);
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delay(1);
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uint32_t setting = analogRead(PIN_DIFFICULTY);
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uint32_t divisor = 4096/9;
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return setting/divisor;
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}
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