/*

* File: lcd.c

* Author: 477grp8

*

* Created on April 28, 2015, 9:27 PM

*/

#include <xc.h>

#include "lcd.h"

#include "delay.h"

void writeEN(){

LCDCE = 0; //enable LCD chip

LCDWR = 0; //enable write to LCD

}

void writeDIS(){

LCDCE = 1; //chip enable high

LCDWR = 1; //stop writing

}

void LCDStat(){

delayNs(2); //TODO Change later to 1, leaving it slow while I'm working

}

void sendByte( char b ){

DB = b;

writeEN();

asm("nop");

writeDIS();

}

void sendCommand( char cmd ){

LCDStat();

LCDCD = 1;

sendByte(cmd);

}

void sendData( char data ){

LCDStat();

LCDCD = 0;

sendByte(data);

}

void setMode(){

sendCommand( 0x83 );

}

void setGraphicHome(){

sendData( 0x00 );

sendData( 0x08 );

sendCommand( 0x42 );

}

void setGraphicArea(){

sendData( 0x14 );

sendData( 0x00 );

sendCommand( 0x43 );

}

void setTextHome(){

sendData( 0x00 );

sendData( 0x00 );

sendCommand( 0x40 );

}

void setTextArea(){

sendData( 0x14 );

sendData( 0x00 );

sendCommand( 0x41 );

}

void setCGRom(){

sendData( 0x03 );

sendData( 0x00 );

sendCommand( 0x22 );

}

void setAddrPointer( char first , char second ){

sendData( first );

sendData( second );

sendCommand( 0x24 );

}

void DAWSet(){ sendCommand( 0xB0 ); }

void DARSet(){ sendCommand( 0xB1 ); }

void DAReset(){

sendCommand(0xB2);

}

void TestMessage(){

int i;

setAddrPointer( 0x00 , 0x00 );

DAWSet();

for(i=8;i>0;i=i--){

LCDStat();

sendData(0x28);LCDStat();

sendData(0x45);LCDStat();

sendData(0x59);LCDStat();

sendData(0x00);LCDStat();

sendData(0x2C);LCDStat();

sendData(0x4F);LCDStat();

sendData(0x4F);LCDStat();

sendData(0x4B);LCDStat();

sendData(0x01);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x21);LCDStat();

sendData(0x00);LCDStat();

sendData(0x34);LCDStat();

sendData(0x48);LCDStat();

sendData(0x49);LCDStat();

sendData(0x4E);LCDStat();

sendData(0x47);LCDStat();

sendData(0x01);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);LCDStat();

sendData(0x00);

}

}

void clearMemory(int n){

//clear 20 cols by 16 rows: 320 addresses

int i;

DAWSet();

for(i=n;i>0;i--){

sendData(0x00);LCDStat();

}

DAReset();

}

void clearGraphics(){

setAddrPointer( 0x00 , 0x00 );

clearMemory(120);

}

void clearText(){

setAddrPointer( 0x00 , 0x00 );

clearMemory(120);

}

void clearDisplay(){

setAddrPointer( 0x00 , 0x00 );

clearMemory(320);

}

void WriteDisplay(){

setAddrPointer( 0x00 , 0x00 );

TestMessage();

}

void setCursorPattern(){

sendCommand( 0xA0 );

}

void setCursorPointer( char col , char row ){

sendData(col);

sendData(row);

sendCommand( 0x21 );

}

void setDisplayMode(){

sendCommand(0x94);

}

void PrintInt (int val){

DAWSet();

sendData(val+16);

LCDStat();

DAReset();

}

void PrintChar (char val){

int i = val;

i = i - 32;

DAWSet();

sendData(i);

LCDStat();

DAReset();

}

void PrintString(char* string){

int i = 0;

char next;

next = string[i];

while(next != '\0'){

PrintChar(next);

i++;

next = string[i];

}

}

void PrintFloat(float val)

{

//always prints 5 places

int i = val*100;

int pflag = 0;

int thous = i/10000;

int hund = i/1000 - thous*10;

int tenth = i/100 - thous*100 - hund*10;

int dectenth = i/10 - thous*1000 - hund*100 - tenth*10;

int dechund = i/1 - thous*10000 - hund*1000 - tenth*100 - dectenth*10;

if(thous && !pflag){

PrintInt(thous);

pflag = 1;

}

else{

PrintString(" ");

}

if(hund){

PrintInt(hund);

pflag = 1;

}

else{

PrintString(" ");

}

PrintInt(tenth);

PrintString(".");

PrintInt(dectenth);

PrintInt(dechund);

}

void PrintEmptyLine(){

// 20 spaces per line

PrintString(" ");

}

void PrintMenu(char *menu, int select){

clearDisplay();

setAddrPointer( 0x00 , 0x00 );

size_t line=0, chs = 0, i=0;

if(select==line){ PrintChar('>'); }

else{ PrintChar(' '); }

chs++;

while(menu[i]!='\0'){

if(menu[i]=='\n'){

while(chs++<20){

PrintChar(' ');

}

if(++line == select){

PrintChar('>');

}

else{ PrintChar(' '); }

chs = 1;

}

else{

chs++;

PrintChar(menu[i]);

}

i++;

}

PrintEmptyLine();

PrintEmptyLine();

PrintEmptyLine();

PrintEmptyLine();

PrintEmptyLine();

}

void PrintStockInfo(char* ticker, float value, float open, float close, float predict){

int negflag;

float change = value - open;

if(change < 0){

negflag = 1;

change = open - value;

}

else{

negflag = 0;

}

setAddrPointer( 0x00 , 0x00 );

PrintString(" Stock Report ");

PrintEmptyLine();

PrintEmptyLine();

PrintString(" Ticker: ");

PrintString(ticker);

int i=0;

while(ticker[i++] != '\0'){}

while(i++ <= 5){ PrintString(" "); }

PrintString(" ");

PrintEmptyLine();

PrintString(" Value: ");

PrintFloat(value);

PrintString(" ");

PrintString(" Open: ");

PrintFloat(open);

PrintString(" ");

PrintString(" Close: ");

PrintFloat(close);

PrintString(" ");

//PrintEmptyLine();

PrintString(" Change:");

if(negflag){

PrintString("-");

}

else{ PrintString("+"); }

PrintFloat(change);

PrintString(" ");

PrintString(" Predict: ");

PrintFloat(predict);

PrintString(" ");

PrintEmptyLine();

PrintString(" ^ Menu ");

PrintString(" <Prev *Print Next> ");

PrintString(" v Menu ");

PrintEmptyLine();

}

void initLCD(){

//initialize test values

LATF = 0;

LATE = 0;

TRISF = 0;

TRISE = 0;

//Open Drain Controls

ODCE = 0x00;

ODCF = 0x00;

//set LCD control output enables

TRISFbits.TRISF0 = 0; //RF0 output

TRISFbits.TRISF5 = 0; //RF5 output

TRISDbits.TRISD0 = 0; //RD0 output

TRISDbits.TRISD5 = 0; //RD5 output

TRISDbits.TRISD9 = 0;//RD9 output

TRISDbits.TRISD10 = 0; //RD10 output

TRISDbits.TRISD11 = 0; //RD11 output

//LCD Init

LCDHALT = 1;

LCDCE = 1;

LCDCD = 1;

LCDRD = 1;

LCDWR = 1;

LCDRST = 0;

delayMs(50);

LCDRST = 1;

delayMs(50);

setTextHome(); //map text memory

setTextArea(); //map

setGraphicHome();

setGraphicArea();

setMode();

setCursorPattern();

setDisplayMode(); //works

clearDisplay(); //why isn't the display clearing

setAddrPointer( 0x00 , 0x00 );

//PrintStockInfo("ATVI", 122.72,2.81, 22.8);

delayMs(50);

LCDCE = 0; //enable chip

delayMs(5000);

}