Diff: LCD/LCD.cpp

Revision:

6:c2299e3de428

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD/LCD.cpp	Sat Dec 23 18:44:37 2017 +0000
@@ -0,0 +1,223 @@
+#include "mbed.h"
+#include "LCD.h"
+
+int setInt = 0;
+Ticker T;
+
+NewLCD::NewLCD(PinName RS, PinName E, PinName D0, PinName D1, PinName D2, PinName D3) : _RS(RS),_E(E), _D(D0, D1, D2, D3) {    
+
+    _E = 0;
+    wait(0.000040f);
+    _E = 1;
+    _RS = 0;                //Command mode
+    
+    wait(0.015);            //Wait 15ms to ensure device is powered
+    
+    for (int i=0; i<3; i++) {
+        writeByte(0x03);    //set DDRAM address to 0. Do this multiple times
+        wait(0.00164);  
+    }
+    
+    writeByte(0x2);         //4-bit mode. Not sure how this sets bits 5 & 4 when we shift them using writeByte. 0010 0000 or 0000 0010?
+    wait(0.000040f);        
+        
+    writeCommand(0x28);     //4-bit mode, 2 lines, 5x8 dots.    0010 1000
+    writeCommand(0x0F);     //display on, cursor off, blinking cursor off.  0000 1100  (0x0C for nomral operation, 0x0F for everything on)
+    writeCommand(0x06);      //cursor moves to right when displaying text.   0000 0110
+    wait(0.00152);
+    
+    hours = 0;
+    minutes = 0;
+    day = 0;
+    month = 0;
+    year = 2017;
+    firstSet = true;
+    
+}
+
+void NewLCD::charDisp(int column, int row, char c) {
+    int addr = DDRAMAddress(column, row);
+    writeCommand(addr);
+    writeData(c);
+}
+
+int NewLCD::DDRAMAddress(int column, int row) {
+    return (0x80 + (row * 0x40) + column);
+}
+
+void NewLCD::cursorLocation(int column, int row) {
+    _column = column;
+    _row = row;
+}
+
+void NewLCD::shiftCursor(string direction) {
+    if (direction == "right") {         //shift to right
+        writeCommand(0x14);         //0001 0100
+    } else if (direction == "left") {  //shift to left
+        writeCommand(0x10);         //0001 0000
+    }
+}
+
+void NewLCD::clearScreen() {
+    writeCommand(0x01);         //clear screen and set cursor to 0
+    wait(0.00164f);             //this command takes 1.64 ms
+    cursorLocation(0, 0);
+}
+
+int NewLCD::_putc(int txt) {
+    if (txt == '\n') {
+        _column = 0;
+        _row++;
+        if (_row >= 2) {
+            _row = 0;
+        }
+    } else {
+        charDisp(_column, _row, txt);
+        _column++;
+        if (_column >= 16) {
+            _column = 0;
+            _row++;
+            if (_row >= 2) {
+                _row = 0;
+            }
+        }
+    }
+    return txt;
+}
+int NewLCD::_repc(int txt) {
+    if (txt == '\n') {
+        _column = 0;
+        _row++;
+        if (_row >= 2) {
+            _row = 0;
+        }
+    } else {
+        charDisp(_column, _row, txt);
+        if (_column >= 16) {
+            _column = 0;
+            _row++;
+            if (_row >= 2) {
+                _row = 0;
+            }
+        }
+    }
+    return txt;
+}
+
+
+int NewLCD::_getc() {
+    return -1;
+}
+
+void NewLCD::writeByte(char byteToSend) {
+    _D = byteToSend >> 4;
+    wait(0.000040f); // most instructions take 40us
+    _E = 0;
+    wait(0.000040f);
+    _E = 1;
+    _D = byteToSend >> 0;
+    wait(0.000040f);
+    _E = 0;
+    wait(0.000040f);  // most instructions take 40us
+    _E = 1;
+}
+
+void NewLCD::writeCommand(char commandToSend) {
+    _RS = 0;
+    writeByte(commandToSend);
+}
+
+void NewLCD::writeData(char dataToSend) {
+    _RS = 1;
+    writeByte(dataToSend);
+}
+
+void NewLCD::setDateAndTime(int sw1s, int sw2s) {
+        
+        clearScreen();
+        printf("Time: %d:%d\n", hours, minutes);
+        printf("Date: %d/%d/%d", day, month, year);
+        if(sw1s == 1){
+            wait(0.2);
+            setInt = setInt + 1;
+            if(setInt >= 5) {
+                setInt = 1;
+                }
+            }
+        
+        switch(setInt){
+            case 1:
+                if(sw2s == 1) {
+                    wait(0.2);
+                    minutes = minutes + 1;
+                    if(minutes >= 60) {
+                        minutes = 0;
+                        }
+
+                    }
+                    break;
+            case 2:
+                if(sw2s == 1) {
+                    wait(0.2);
+                    hours = hours + 1;
+                    if(hours >= 24) {
+                        hours = 0;
+                        }
+
+                    }
+                    break;
+            case 3:
+            
+                if(sw2s == 1) {
+                    wait(0.2);
+                    month = month + 1;
+                    if(month >= 12) {
+                        month = 0;
+                        }
+
+                    }
+
+                    break;
+            case 4:
+                if(sw2s == 1) {
+                    wait(0.2);
+                    day = day + 1;
+                    if(day >= 31) {
+                        day = 0;
+                        }
+
+                    }
+                    break;
+            default:
+                    break;
+}
+
+}
+    void NewLCD::updateClock() {
+    minutes = minutes + 1;
+    if(minutes >= 60) {
+        minutes = 0;
+        hours = hours + 1;
+        if(hours >= 24) {
+            hours = 0;
+            day = day + 1;
+                if(day >= 31) {
+                    day = 0;
+                    month = month + 1;
+                    if(month >= 12) {
+                        month = 0;
+                        }
+                }           
+        }        
+    }
+        clearScreen();
+        printf("Time: %d:%d\n", hours, minutes);
+        printf("Date: %d/%d/%d", day, month, year);
+}
+
+void NewLCD::startClock() {
+    T.attach(this, &NewLCD::updateClock, 60);
+}
+    
+
+