Revision 2:8752f5af08a4, committed 2017-03-14

Comitter:

simplyellow

Date:

Tue Mar 14 07:21:49 2017 +0000

Parent:

1:876e9cc9088b

Commit message:

Final version of etch a sketch;

Changed in this revision

--- a/main.cpp	Mon Mar 13 22:27:09 2017 +0000
+++ b/main.cpp	Tue Mar 14 07:21:49 2017 +0000
@@ -1,9 +1,7 @@
 #include "mbed.h"
+#include "uLCD_4DGL.h"
 
-//#include "uLCD_4DGL.h"
-
-Serial pc(USBTX, USBRX);
-
+//left wheel parameters
 InterruptIn leftchA(p26);
 InterruptIn leftchB(p25);
 int leftChanA;
@@ -11,7 +9,9 @@
 int leftCurrState;
 int leftPrevState;
 int leftChange;
+volatile int count1 = 0;
 
+//right wheel parameters
 InterruptIn rightchA(p13);
 InterruptIn rightchB(p14);
 int rightChanA;
@@ -19,34 +19,56 @@
 int rightCurrState;
 int rightPrevState;
 int rightChange;
-
-volatile int count1 = 0;
 volatile int count2 = 0;
 
-//uLCD_4GDL uLCD(p9,p10,p11);
-InterruptIn pb(p21);
-DigitalOut led(LED1);
+//etch a sketch cursor positions
+int x;
+int y;
+int oldx;
+int oldy;
+
+uLCD_4DGL uLCD(p9,p10,p11);
+
+//clearing screen control
+InterruptIn cls(p21);
+DigitalOut led1(LED1);      //flashes to indicate clear
 
+//drawing control
+InterruptIn pen(p22);
+bool capOn = true;
+DigitalOut led2(LED2);      //on when drawing is turned off
+
+//bluetooth color control
+Serial bluemod(p28, p27);
+int color = 0xFF0000;       // default red
+volatile char bred = 0;
+volatile char bgreen = 0;
+volatile char bblue = 0;
+Ticker t;
+
+//toothbrush motor vibrates during usage
+DigitalOut haptic(p20);
 
 /*
-Implemented barebones version of "QEI.h" by Aaron Berk for the sake of
-understanding the concept of X4 encoding
-00 01 11 10 00
-4 different states
+*   example 01 <- 11
+*   change = (11&01 = 01) ^ (01&10 = 00>>1) = 1
+*   example 10 -> 00
+*   change = (10&01 = 00) ^ (00&10 = 00>>1) = 0
+*   Implemented barebones version of "QEI.h" by Aaron Berk for the sake of
+*   understanding the concept of X4 encoding
+*   00 01 11 10 00
+*   4 different states
 */
 
+/*
+*   Calculate the number of pulses recorded by the left wheel
+*/
 void encode1() {
     leftChange = 0;
     leftChanA  = leftchA.read();
     leftChanB  = leftchB.read();
     leftCurrState = (leftChanA << 1) | (leftChanB);
     if (((leftCurrState ^ leftPrevState) != 0x3) && (leftCurrState != leftPrevState)) {
-        // example 01 <- 11
-        // change = (11&01 = 01) ^ (01&10 = 00>>1) = 1
-        // example 10 -> 00
-        // change = (10&01 = 00) ^ (00&10 = 00>>1) = 0
-        // change = (if(left)    ^
-
         leftChange = (leftPrevState & 0x1) ^ ((leftCurrState & 0x2) >> 1);
         if (leftChange == 0) {
             leftChange = -1;
@@ -56,18 +78,15 @@
     leftPrevState = leftCurrState;
 }
 
+/*
+*   Calculate the number of pulses recorded by the right wheel
+*/
 void encode2() {
     rightChange = 0;
     rightChanA  = rightchA.read();
     rightChanB  = rightchB.read();
     rightCurrState = (rightChanA << 1) | (rightChanB);
     if (((rightCurrState ^ rightPrevState) != 0x3) && (rightCurrState != rightPrevState)) {
-        // example 01 <- 11
-        // change = (11&01 = 01) ^ (01&10 = 00>>1) = 1
-        // example 10 -> 00
-        // change = (10&01 = 00) ^ (00&10 = 00>>1) = 0
-        // change = (if(left)    ^
-
         rightChange = (rightPrevState & 0x1) ^ ((rightCurrState & 0x2) >> 1);
         if (rightChange == 0) {
             rightChange = -1;
@@ -77,12 +96,51 @@
     rightPrevState = rightCurrState;
 }
 
-
+/*
+*   Clear the LCD screen with a pushbutton
+*/
 void clear() {
-    //uLCD.cls();
-    led = !led;
+    uLCD.cls();
+    led1 = 1;
+    wait(0.1);
+    led1 = 0;
+    wait(0.1);
+}
+
+/*
+*   Toggle the drawing on the LCD screen
+*/
+void cap() {
+    capOn = !capOn;
+    if(!capOn) {
+        led2 = 1;
+    } else {
+        led2 = 0;
+    }
 }
 
+/*
+*   Change the color of the Etch A Sketch 'ink' using bluetooth input
+*/
+void colorChange() {
+    while(bluemod.readable()) {
+        if(bluemod.getc()=='!') {
+            if(bluemod.getc()=='C') {
+                bred = bluemod.getc();
+                bgreen = bluemod.getc();
+                bblue = bluemod.getc();
+                if (bluemod.getc()==char(~('!' + 'C' + bred + bgreen + bblue))) {
+                    color = (bred << 16 | bgreen << 8 | bblue);
+                }
+            }
+        }
+    }
+}
+
+/*
+*   Set up pull-ups, initial states, and interrupts on the two wheels and
+*   hall sensors
+*/
 void setupEncoder() {
     leftchA.mode(PullUp);
     leftchB.mode(PullUp);
@@ -111,16 +169,43 @@
 }
 
 int main() {
+    //set up features
     setupEncoder();
-    pb.mode(PullUp);
-    pb.fall(&clear); //pb to clear screen
-    //add a pb to turn on and off pen
-    //add a pot to go through colors
-    //have something display current color and RGB val
+    cls.mode(PullUp);
+    cls.fall(&clear);
+    pen.mode(PullUp);
+    pen.fall(&cap);
+    t.attach(&colorChange, 0.0625);
+
+    //set up LCD
+    uLCD.baudrate(300000);
+    uLCD.background_color(BLACK);
+    uLCD.cls();
+
+    //set up cursor positions
+    //for the wheels, +/- counts of 1280 will get you to the edge of screen
+    x = 64;
+    y = 64;
+    oldx = x;
+    oldy = y;
+    uLCD.pixel(x, y, color);
+
     while(1) {
-        pc.printf("count1: %d\r\n", count1);
-        pc.printf("count2: %d\r\n", count2);
-        pc.printf("---------\r\n");
-        wait(.1);
+        //converting counts to LCD coordinates
+        oldx = x;
+        oldy = y;
+        x = 64+count1/20;
+        y = 64+count2/20;
+        //if cursor moves, motor vibrates
+        if(x!=oldx || y!=oldy) {
+            haptic = 1;
+            wait(0.05);
+        } else {
+            haptic = 0;
+        }
+        //if pen is activated, draw is
+        if(capOn) {
+            uLCD.pixel(x, y, color);
+        }
     }
 }
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