#define MANUAL_OPEN_PIN 12 // keys for manual open and close
#define MANUAL_CLOSE_PIN 13 //
+#define DEBOUNCE_DELAY 6250 // * 16us = 100ms
+#define DEBOUNCE_IDLE 0 // currently no debouncing
+#define DEBOUNCE_OPEN 1 // debouncing open key
+#define DEBOUNCE_CLOSE 2 // debouncing close key
+#define DEBOUNCE_FINISHED 4 // debouncing finished
+byte debounce_state;
+int debounce_cnt = 0;
#define IDLE 0 // close and open may be called
#define OPENING 1 // opening, only 's' command is allowed
#define CMD_OPEN 'o'
#define CMD_CLOSE 'c'
+#define CMD_TOGGLE 't'
#define CMD_STATUS 's'
#define CMD_RESET 'r'
pinMode(MANUAL_CLOSE_PIN, INPUT); // set pin to input
digitalWrite(MANUAL_CLOSE_PIN, HIGH); // turn on pullup resistors
+
+ debounce_state = DEBOUNCE_IDLE;
+ debounce_cnt = DEBOUNCE_DELAY;
}
-boolean manual_open()
+boolean manual_open_pressed()
{
if(digitalRead(MANUAL_OPEN_PIN))
return false;
return true;
}
-boolean manual_close()
+boolean manual_close_pressed()
{
if(digitalRead(MANUAL_CLOSE_PIN))
return false;
return true;
}
+void start_debounce_timer() // this breaks millis() function, but who cares
+{
+ debounce_cnt = DEBOUNCE_DELAY;
+
+ TCCR0A = 0; // no prescaler, WGM = 0 (normal)
+ TCCR0B = 1<<CS00; //
+ OCR0A = 255; // 1+255 = 256 -> 16us @ 16 MHz
+ TCNT0 = 0; // reseting timer
+ TIMSK0 = 1<<OCF0A; // enable Interrupt
+
+}
+
+void stop_debounce_timer()
+{
+ // timer0
+ TCCR0B = 0; // no clock source
+ TIMSK0 = 0; // disable timer interrupt
+}
+
+ISR(TIMER0_COMPA_vect)
+{
+ if(((debounce_state & DEBOUNCE_OPEN) && manual_open_pressed()) ||
+ ((debounce_state & DEBOUNCE_CLOSE) && manual_close_pressed())) {
+ if(debounce_cnt) {
+ debounce_cnt--;
+ return;
+ }
+ debounce_state |= DEBOUNCE_FINISHED;
+ }
+ debounce_cnt = DEBOUNCE_DELAY;
+}
+
+boolean manual_open()
+{
+ if(manual_open_pressed()) {
+ if(debounce_state & DEBOUNCE_CLOSE) {
+ stop_debounce_timer();
+ debounce_state = DEBOUNCE_IDLE;
+ return false;
+ }
+
+ if(debounce_state == DEBOUNCE_IDLE) {
+ debounce_state = DEBOUNCE_OPEN;
+ start_debounce_timer();
+ }
+ else if(debounce_state & DEBOUNCE_FINISHED) {
+ stop_debounce_timer();
+ debounce_state = DEBOUNCE_IDLE;
+ return true;
+ }
+ }
+ else if(debounce_state & DEBOUNCE_OPEN) {
+ stop_debounce_timer();
+ debounce_state = DEBOUNCE_IDLE;
+ }
+
+ return false;
+}
+
+boolean manual_close()
+{
+ if(manual_close_pressed()) {
+ if(debounce_state & DEBOUNCE_OPEN) {
+ stop_debounce_timer();
+ debounce_state = DEBOUNCE_IDLE;
+ return false;
+ }
+
+ if(debounce_state == DEBOUNCE_IDLE) {
+ debounce_state = DEBOUNCE_CLOSE;
+ start_debounce_timer();
+ }
+ else if(debounce_state & DEBOUNCE_FINISHED) {
+ stop_debounce_timer();
+ debounce_state = DEBOUNCE_IDLE;
+ return true;
+ }
+ }
+ else if(debounce_state & DEBOUNCE_CLOSE) {
+ stop_debounce_timer();
+ debounce_state = DEBOUNCE_IDLE;
+ }
+
+ return false;
+}
+
//********************************************************************//
void reset_stepper()
stop_timer();
reset_stepper();
current_state = IDLE;
+ Serial.print("Status: ");
+ if(is_opened())
+ Serial.print("opened");
+ else if(is_closed())
+ Serial.print("closed");
+ Serial.println(", idle");
return;
}
else if(current_state == ERROR) {
void start_open()
{
- if(is_opened()) {
- Serial.println("Already open");
- return;
- }
-
reset_stepper();
reset_leds();
leds_green();
current_state = OPENING;
start_step_timer();
- Serial.println("Ok");
}
void start_close()
{
- if(is_closed()) {
- Serial.println("Already closed");
- return;
- }
-
reset_stepper();
reset_leds();
leds_red();
current_state = CLOSING;
start_step_timer();
- Serial.println("Ok");
}
void print_status()
char command = Serial.read();
if(current_state == ERROR && command != CMD_RESET) {
- Serial.println("Error: last open/close operation took to long!");
+ Serial.println("Error: last open/close operation took too long!");
}
else if (command == CMD_RESET) {
reset_after_error();
}
else if (command == CMD_OPEN) {
- if(current_state == IDLE)
- start_open();
+ if(current_state == IDLE) {
+ if(is_opened())
+ Serial.println("Already open");
+ else {
+ start_open();
+ Serial.println("Ok");
+ }
+ }
else
Serial.println("Error: Operation in progress");
}
else if (command == CMD_CLOSE) {
- if(current_state == IDLE)
- start_close();
+ if(current_state == IDLE) {
+ if(is_closed())
+ Serial.println("Already closed");
+ else {
+ start_close();
+ Serial.println("Ok");
+ }
+ }
+ else
+ Serial.println("Error: Operation in progress");
+ }
+ else if (command == CMD_TOGGLE) {
+ if(current_state == IDLE) {
+ if(is_closed())
+ start_open();
+ else
+ start_close();
+ Serial.println("Ok");
+ }
else
Serial.println("Error: Operation in progress");
}
else
Serial.println("Error: unknown command");
}
- if(manual_open() && !is_opened() && current_state == IDLE) {
+ if(manual_open() && !is_opened() && (current_state == IDLE || current_state == ERROR)) {
Serial.println("open forced manually");
start_open();
}
- if(manual_close() && !is_closed() && current_state == IDLE) {
+ if(manual_close() && !is_closed() && (current_state == IDLE || current_state == ERROR)) {
Serial.println("close forced manually");
start_close();
}