Ellie Griffiths
An updated and more polished version of the earlier TeaBasic. This is now finished and works like a treat.
Revision 0:36264f703f1c, committed 2011-06-29
- Comitter:
- Eggotape
- Date:
- Wed Jun 29 13:20:33 2011 +0000
- Commit message:
- Haven\t tried it with water yet, so may want to consider slowing the Servo down to avoid splashing.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DebouncedIn.cpp Wed Jun 29 13:20:33 2011 +0000
@@ -0,0 +1,93 @@
+#include "DebouncedIn.h"
+#include "mbed.h"
+
+/*
+ * Constructor
+ */
+DebouncedIn::DebouncedIn(PinName in)
+ : _in(in) {
+
+ // reset all the flags and counters
+ _samples = 0;
+ _output = 0;
+ _output_last = 0;
+ _rising_flag = 0;
+ _falling_flag = 0;
+ _state_counter = 0;
+
+ // Attach ticker
+ _ticker.attach(this, &DebouncedIn::_sample, 0.005);
+}
+
+void DebouncedIn::_sample() {
+
+ // take a sample
+ _samples = _samples >> 1; // shift left
+
+ if (_in) {
+ _samples |= 0x80;
+ }
+
+ // examine the sample window, look for steady state
+ if (_samples == 0x00) {
+ _output = 0;
+ }
+ else if (_samples == 0xFF) {
+ _output = 1;
+ }
+
+
+ // Rising edge detection
+ if ((_output == 1) && (_output_last == 0)) {
+ _rising_flag++;
+ _state_counter = 0;
+ }
+
+ // Falling edge detection
+ else if ((_output == 0) && (_output_last == 1)) {
+ _falling_flag++;
+ _state_counter = 0;
+ }
+
+ // steady state
+ else {
+ _state_counter++;
+ }
+
+ // update the output
+ _output_last = _output;
+
+}
+
+
+
+// return number of rising edges
+int DebouncedIn::rising(void) {
+ int return_value = _rising_flag;
+ _rising_flag = 0;
+ return(return_value);
+}
+
+// return number of falling edges
+int DebouncedIn::falling(void) {
+ int return_value = _falling_flag;
+ _falling_flag = 0;
+ return(return_value);
+}
+
+// return number of ticsk we've bene steady for
+int DebouncedIn::steady(void) {
+return(_state_counter);
+}
+
+// return the debounced status
+int DebouncedIn::read(void) {
+ return(_output);
+}
+
+// shorthand for read()
+DebouncedIn::operator int() {
+ return read();
+}
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DebouncedIn.h Wed Jun 29 13:20:33 2011 +0000
@@ -0,0 +1,31 @@
+#include "mbed.h"
+
+ class DebouncedIn {
+ public:
+ DebouncedIn(PinName in);
+
+ int read (void);
+ operator int();
+
+ int rising(void);
+ int falling(void);
+ int steady(void);
+
+ private :
+ // objects
+ DigitalIn _in;
+ Ticker _ticker;
+
+ // function to take a sample, and update flags
+ void _sample(void);
+
+ // counters and flags
+ int _samples;
+ int _output;
+ int _output_last;
+ int _rising_flag;
+ int _falling_flag;
+ int _state_counter;
+
+ };
+
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Servo.lib Wed Jun 29 13:20:33 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/Servo/#36b69a7ced07
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Wed Jun 29 13:20:33 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/TextLCD/#44f34c09bd37
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Jun 29 13:20:33 2011 +0000
@@ -0,0 +1,209 @@
+#include "mbed.h"
+#include "Servo.h"
+#include "TextLCD.h"
+#include "DebouncedIn.h"
+
+TextLCD lcd(p15, p16, p17, p18, p19, p20); // rs, e, d4-d7
+DebouncedIn setbutton(p5);
+DebouncedIn gobutton(p6);
+Servo myservo(p21);
+DigitalOut leda(LED1);
+DigitalOut ledb(LED2);
+DigitalOut ledc(LED3);
+DigitalOut ledd(LED4);
+Timer t;
+Timer t2;
+
+int set();
+int dip();
+int set (int currentstate);
+int displaystate(int currentstate);
+int maketea(int currentstate);
+int dipping();
+int alert();
+int alertoff();
+
+int main() {
+ int state;
+ state = 1;
+ myservo = 1;
+ lcd.cls();
+ lcd.printf("Start?\n");
+ while(1) {
+ if (setbutton.rising()) {
+ state = set(state);
+ }
+ else if (gobutton.rising()) {
+ maketea(state);
+ }
+ }
+}
+
+int set(int currentstate) { //For setting which mode to use
+ t.start(); //Inactivity timer
+ lcd.cls();
+ displaystate(currentstate);
+ while (gobutton != 1 and t < 10) {
+ if (setbutton.rising()) {
+ currentstate = currentstate + 1; //Advances state
+ if (currentstate > 9) { //Loops back to start
+ currentstate = 1;
+ }
+ lcd.cls();
+ displaystate(currentstate); //Update current state
+ wait(0.25); //Debounce
+ t.reset();
+ t.start(); //Reset inactivity timer
+ }
+ }
+ lcd.cls();
+ lcd.printf("Start?\n"); //Reset screen
+ return currentstate;
+}
+
+int displaystate(int currentstate) { //Displays current setting
+ if (currentstate == 1) {
+ lcd.printf("1 min - dip\n");
+ }
+ else if (currentstate == 2) {
+ lcd.printf("2 mins - dip\n");
+ }
+ else if (currentstate == 3) {
+ lcd.printf("3 mins - dip\n");
+ }
+ else if (currentstate == 4) {
+ lcd.printf("1 min - no dip\n");
+ }
+ else if (currentstate == 5) {
+ lcd.printf("2 mins - no dip\n");
+ }
+ else if (currentstate == 6) {
+ lcd.printf("3 mins - no dip\n");
+ }
+ else if (currentstate == 7) {
+ lcd.printf("4 mins - no dip\n");
+ }
+ else if (currentstate == 8) {
+ lcd.printf("5 mins - no dip\n");
+ }
+ else if (currentstate == 9) {
+ lcd.printf("QTEST\n");
+ }
+ return 0;
+}
+
+int maketea(int currentstate) { //Main teamaking routine
+ lcd.cls();
+ lcd.printf("Brewing...\n");
+ displaystate(currentstate); //Display status
+ int time;
+ int dip;
+ if (currentstate == 1) { //Initialise time and dipping status
+ time = 60;
+ dip = 1;
+ }
+ else if (currentstate == 2) {
+ time = 120;
+ dip = 1;
+ }
+ else if (currentstate == 3) {
+ time = 180;
+ dip = 1;
+ }
+ else if (currentstate == 4) {
+ time = 60;
+ dip = 0;
+ }
+ else if (currentstate == 5) {
+ time = 120;
+ dip = 0;
+ }
+ else if (currentstate == 6) {
+ time = 180;
+ dip = 0;
+ }
+ else if (currentstate == 7) {
+ time = 240;
+ dip = 0;
+ }
+ else if (currentstate == 8) {
+ time = 300;
+ dip = 0;
+ }
+ else if (currentstate == 9) {
+ time = 10;
+ dip = 0;
+ }
+ myservo = 0; //Dunk teabag
+ t.start(); //Start tea timer
+ while (t < time) { //While there's still time left
+ if (dip == 1) { //If dipping, dip teabag
+ wait(1);
+ dipping();
+ }
+ if (gobutton.rising()) { //If cancelling
+ lcd.cls();
+ lcd.printf("Press again to\n");
+ lcd.printf("stop brewing.\n");
+ t2.start(); //Start (secondary) inactivity timer
+ while (t2 <= 5) {
+ if (gobutton.rising()) {
+ time = 0; //Resets time to run to 0, thus pulling out of main while loop
+ break; //Pulls out of this loop
+ }
+ }
+ t2.reset();
+ lcd.cls();
+ lcd.printf("Brewing...\n");
+ displaystate(currentstate); //Reset screen to brewing
+ }
+ }
+ t.reset();
+ myservo = 1;
+ lcd.cls();
+ lcd.printf("Done!\n");
+ lcd.printf("Reset?\n");
+ t.start();
+ while ((!setbutton.rising()) && (!gobutton.rising())) { //If not reset in 90 seconds, alert
+ if (t > 90) {
+ alert();
+ }
+ }
+ alertoff();
+ lcd.cls();
+ lcd.printf("Start?\n"); //Reset
+ wait(1);
+ return 0;
+}
+
+int dipping() { //Dipping routine
+ myservo = 0.5;
+ wait(1);
+ myservo = 0;
+ return 0;
+}
+
+int alert() { //Alert using on-board LEDs
+ int y;
+ for ( y = 0; y != 1; y++ ) {
+ leda = 1;
+ ledb = 0;
+ ledc = 1;
+ ledd = 0;
+ wait(0.2);
+ leda = 0;
+ ledb = 1;
+ ledc = 0;
+ ledd = 1;
+ wait(0.2);
+ }
+ return 0;
+}
+
+int alertoff() { //Resets on-board LEDs to 0
+ leda = 0;
+ ledb = 0;
+ ledc = 0;
+ ledd = 0;
+ return 0;
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Jun 29 13:20:33 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912