E3 Designers
Baseline for testing
Diff: LCD.cpp
- Revision:
- 0:c428f1d60316
- Child:
- 1:0f1dffc6103a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD.cpp Thu Jul 25 00:43:40 2019 +0000
@@ -0,0 +1,575 @@
+#include "mbed.h"
+#include "LCD.h"
+
+LCD::LCD():
+ LCD_E1(p17),
+ LCD_E2(p18),
+ LCD_RS(p19),
+ LCD_RW(p20),
+ //LCD_D4(p24),
+ //LCD_D5(p23),
+ //LCD_D6(p22),
+ //LCD_D7(p21),
+ //bus constructor is the reverse order of the pins in the byte order.
+ // d0 - d7
+ LCD_DATA( p24, p23, p22, p21)
+{
+
+
+ LCD_DATA.output();
+ LCD_DATA.mode(OpenDrain);
+ LCD_E1.mode(OpenDrain);
+ LCD_E2.mode(OpenDrain);
+ LCD_RS.mode(OpenDrain);
+ LCD_RW.mode(OpenDrain);
+ isOutput=1;
+
+}
+/*
+ * Destructor the LCD.
+ */
+LCD::~LCD()
+{
+}
+
+
+
+void LCD::command1(char i) //Top half of the display
+{
+ LCD_DATA.output();
+ LCD_DATA = i;
+ LCD_RW = 0;
+ LCD_RS = 0;
+ LCD_E1 = 1;
+ wait_us(40); // wait 40 us for most commands
+ LCD_E1 = 0;
+
+ //printf("C1:%x\n\r", i);
+}
+
+void LCD::command2(char i) //Bottom half of the display
+{
+ LCD_DATA.output();
+ LCD_DATA = i;
+ LCD_RW = 0;
+ LCD_RS = 0;
+ LCD_E2 = 1;
+ wait_us(40); // wait 40 us for most commands
+ LCD_E2 = 0;
+
+ //printf("C2:%x\n\r", i);
+}
+
+void LCD::writedata1(char i) //Top half of the display
+{;
+ LCD_DATA.output();
+ LCD_DATA = i;
+ LCD_RW = 0;
+ LCD_RS = 1;
+ LCD_E1 = 1;
+ wait_us(40); // wait 40 us for most commands
+ LCD_E1 = 0;
+ //printf("D1:%x\n\r", i);
+}
+
+void LCD::writedata2(char i) //Bottom half of the display
+{
+ LCD_DATA.output();
+ LCD_DATA = i;
+ LCD_RW = 0;
+ LCD_RS = 1;
+ LCD_E2 = 1;
+ wait_us(40); // wait 40 us for most commands
+ LCD_E2 = 0;
+ //printf("D2:%x\n\r", i);
+}
+
+void LCD::nextline1(){
+ writeCommand(0xc0,1,0); //set DDRAM address to 40 (line 2)
+}
+void LCD::nextline2(){
+ writeCommand(0xc0,0,1); //set DDRAM address to 40 (line 4)
+}
+
+void LCD::display(char *show){ //show character data on display
+ char datum;
+ int i;
+ for (i=0;i<40;i++){
+ datum=*show; //point to 1st line data
+ writeData(datum,1,0); //write to 1st line
+ ++show; //next letter
+ }
+ nextline1(); //move address to line 2
+ for (i=0;i<40;i++){
+ datum=*show;
+ writeData(datum,1,0); //write to 2nd line
+ ++show;
+ }
+ for (i=0;i<40;i++){
+ datum=*show;
+ writeData(datum,0,1); //write to 3rd line
+ ++show;
+ }
+ nextline2(); //move address to line 4
+ for (i=0;i<40;i++){
+ datum=*show;
+ writeData(datum,0,1); //write to 4th line
+ ++show;
+ }
+}
+
+
+void LCD::writeByte1(int value) {
+
+ // -------------------------------------------------
+ LCD_DATA.output();
+ LCD_DATA = value >> 4;
+
+ LCD_RW = 0;
+ LCD_E1 = 1;
+ wait_ms(5); // wait 40 us for most commands
+ __nop();
+ LCD_E1 = 0;
+
+ // -------------------------------------------------
+ wait_ms(1); // wait 40 us for most commands
+
+ // -------------------------------------------------
+ LCD_DATA = value >> 0;
+ LCD_E1 = 1;
+ wait_ms(5); // wait 40 us for most commands
+ __nop();
+ LCD_E1 = 0;
+
+ //printf("x1:%x\n\r", value);
+}
+
+
+void LCD::writeByte2(int value) {
+
+ // -------------------------------------------------
+ LCD_DATA.output();
+ LCD_DATA = value >> 4;
+ LCD_RW = 0;
+ LCD_E2 = 1;
+ wait_ms(5); // wait 40 us for most commands
+ __nop();
+ LCD_E2 = 0;
+
+ // -------------------------------------------------
+ wait_ms(1); // wait 40 us for most commands
+
+ // -------------------------------------------------
+ LCD_DATA = value >> 0;
+ LCD_E2 = 1;
+ wait_ms(5); // wait 40 us for most commands
+ __nop();
+ LCD_E2 = 0;
+
+ //printf("x2:%x\n\r", value);
+}
+
+
+
+/************************************************************************/
+void LCD::init(void)
+{
+
+ wait_ms(100);
+
+ LCD_E1 = 0;
+ LCD_E2 = 0;
+
+ for (int i=0;i<3;i++) {
+ command1(0x3);//Wake up
+ command2(0x3);
+ wait_ms(1); // wait 40 us for most commands
+ }
+ command1(0x2);// Set 4 bit mode
+ command2(0x2);
+ wait_ms(1); // wait 40 us for most commands
+
+
+ LCD_RW = 0;
+ LCD_RS = 0;
+
+ writeCommand(0x28,1,1); //Turn on display
+
+ writeCommand(LCD_setDisplayOff,1,1); //Turn on display
+ //writeCommand2(LCD_setDisplayOff);
+
+ writeCommand(LCD_clearDisplay,1,1); //Clear display
+ //writeCommand2(LCD_clearDisplay);
+
+ writeCommand(LCD_entryModeSet,1,1); //Entry mode cursor increment
+ //writeCommand2(LCD_entryModeSet);
+
+ writeCommand(LCD_setDisplayOn,1,1); //Turn on display; no cursor
+ //writeCommand2(LCD_setDisplayOn);
+
+
+ LCD_E1 = 0;
+ LCD_E2 = 0;
+
+}
+
+
+void LCD::locate(int row, int column) {
+ _row = row;
+ _column = column;
+
+}
+
+void LCD::clear(int e1, int e2 ){
+
+ writeCommand(LCD_clearDisplay,e1,e2);
+ _row = 0;
+ _column = 0;
+
+ // for debugging, write spaces to each cell
+ memset( displayBuffer, 0x85, sizeof(displayBuffer));
+}
+
+
+
+int LCD::isBusy1(void)
+{
+ int input = 0;
+ int hi = 0;
+ int lo = 0;
+ int result = 0;
+
+ LCD_RW = 1;
+ LCD_RS = 0;
+ LCD_DATA.input(); // switch port back to output
+
+ LCD_E1 = 1;
+ __nop();
+ lo = LCD_DATA.read() ; // read low bit
+ LCD_E1 = 0;
+ wait_ms(1);
+ LCD_E1 = 1;
+ hi = LCD_DATA.read() ; // read high bit
+ __nop();
+ LCD_E1 = 0;
+
+ //printf("isBusy1? = 0x%02x 0x%02x \n\r", lo,hi );
+
+ if ((0x8 & input)); // wait until display is ready
+ {
+ result = 1;
+ }
+ result =0;
+ LCD_RW = 0;
+ LCD_DATA.output(); // switch port back to output
+ return result;
+}
+
+int LCD::isBusy2(void)
+{
+
+ int input = 0;
+ int result = 0;
+
+ LCD_RW = 1;
+ LCD_RS = 0;
+
+ LCD_E2 = 1;
+ __nop();
+ input = LCD_DATA.read() >> 0; // read low bit
+ LCD_E2 = 0;
+ __nop();
+ LCD_E2 = 1;
+ input = LCD_DATA.read() >> 4; // read high bit
+ __nop();
+ LCD_E2 = 0;
+
+ //printf("isBusy1? = 0x%02x \n\r", input );
+
+ if ((0x8 & input)); // wait until display is ready
+ {
+ result = 1;
+ }
+
+ LCD_RW = 0;
+ LCD_DATA.output(); // switch port back to output
+
+ return result;
+}
+
+
+
+int LCD::isBusy(int e1, int e2)
+{
+ int input = 0;
+ int result = 0;
+
+ LCD_RW = 1;
+ LCD_RS = 0;
+ LCD_DATA.input(); // switch port back to output
+
+ if (e1) {
+ LCD_E1 = 1;
+ __nop();
+ input = LCD_DATA.read() >> 0; // read low bit
+ LCD_E1 = 0;
+ __nop();
+ LCD_E1 = 1;
+ input = LCD_DATA.read() >> 4; // read high bit
+ __nop();
+ LCD_E1 = 0;
+
+ //printf("0x%02x \n\r", input );
+
+ if ((0x8 & input)); // wait until display is ready
+ {
+ result = 1;
+ }
+ }
+
+
+ if (e2 && result==0) {
+
+ LCD_E2 = 1;
+ __nop();
+ input = LCD_DATA.read() >> 0; // read low bit
+ //printf("0x%02dFF \n\r", input );
+ LCD_E2 = 0;
+ __nop();
+ LCD_E2 = 1;
+ input = LCD_DATA.read() >> 4; // read high bit
+ __nop();
+ LCD_E2 = 0;
+
+ if ((0x8 & input)); // wait until display is ready
+ {
+ result = 1;
+ }
+ }
+ LCD_RW = 0;
+ LCD_DATA.output(); // switch port back to output
+
+ return result;
+}
+
+void LCD::waitBusy()
+{
+ unsigned char statusBit;
+ statusBit = isBusy(1,1);
+ //int i=0;
+ while (statusBit)
+ {
+ statusBit = isBusy(1,1);
+ wait_us(5);
+ }
+}
+
+void LCD::writeData(char value, int e1, int e2 ){
+
+
+ int hi=( value & 0xF0 ) >> 4;
+ int lo=( value & 0x0F ) >> 0;
+
+ LCD_DATA.output();
+
+ if(e1) {
+
+ LCD_DATA = hi;
+ LCD_E1 = 1;
+ wait_us(1000); // wait 40 us for most commands
+ LCD_E1 = 0;
+
+ wait_us(1000); // wait 40 us for most commands
+
+ LCD_DATA = lo;
+ LCD_E1 = 1;
+ wait_us(1000); // wait 40 us for most commands
+ LCD_E1 = 0;
+ }
+
+ if(e2)
+ {
+ LCD_DATA = hi;
+ LCD_E2= 1;
+ wait_us(1000); // wait 40 us for most commands
+ LCD_E2= 0;
+
+ wait_us(1000); // wait 40 us for most commands
+
+ LCD_DATA = lo;
+ LCD_E2= 1;
+ wait_us(1000); // wait 40 us for most commands
+ LCD_E2= 0;
+ }
+}
+
+void LCD::writeCommand(char value, int e1, int e2){
+
+ LCD_RS = 0;
+ writeData(value,e1,e2);
+}
+
+void LCD::writeChar(char value, int e1, int e2){
+ LCD_RS = 1;
+ writeData(value,e1,e2);
+}
+
+
+void LCD::putc(const char c)
+{
+ character(_row, _column, c);
+}
+
+void LCD::printf(const char *message, ...)
+{
+ char buffer[128];
+ va_list argptr;
+ va_start(argptr, message);
+
+ vsprintf( buffer, message, argptr);
+ write (buffer);
+
+ va_end(argptr);
+}
+
+void LCD::write(const char* text) {
+ //_row = 0;
+ //_column = 0;
+ int characterAmount =0;
+
+ for(int i = 0; text[i] != '\0'; i++)
+ characterAmount++;
+
+ for (int i = 0; i < characterAmount && i < rows() * columns(); i++){
+ character(_row, _column, text[i]);
+ }
+}
+
+void LCD::writeLine(int line, const char* text ) {
+
+ _row = line;
+ _column = 1;
+
+ int characterAmount =strlen(text);
+
+ int i=0;
+ locate(_row,_column);
+
+ while(i < columns()-1)
+ {
+ if ( i < characterAmount )
+ putc( text[i]);
+ else
+ putc ( ' ');
+
+ i++;
+ }
+}
+
+void LCD::writeCharacter(const char c, int row, int column) {
+ locate(row, column);
+ character(_row, _column, c);
+}
+
+void LCD::writeCharacters(const char* text, int row, int column) {
+ locate(row, column);
+
+ int characterAmount =0;
+
+ for(int i = 0; text[i] != '\0'; i++)
+ characterAmount++;
+
+ for (int i = 0; i < characterAmount && i < columns() - column; i++){
+ character(_row, _column, text[i]);
+ }
+}
+
+int LCD::address(int row, int column){
+
+ int a=0x80;
+
+ if(row < rows() && column < columns())
+ {
+ switch (row){
+ case 0:
+ case 1:
+ a = 0x80 + (row * 0x40) + column;
+ break;
+ case 2:
+ case 3:
+ a = 0x80 + ((row-2) * 0x40) + column;
+ break;
+ default:
+ break;
+ }
+ }
+
+ return a;
+}
+
+void LCD::character(int row, int column, char c) {
+ uint8_t a = address(row, column);
+
+ // ------------------------------------
+ // write to internal buffer
+ // ------------------------------------
+ displayBuffer [row][column] = c;
+
+ if(row<2){
+ writeCommand(a,1,0);
+ writeChar(c,1,0);
+ }
+ else
+ {
+ writeCommand(a,0,1);
+ writeChar(c,0,1);
+ }
+
+ //Update position
+ if(_column < columns())
+ _column++;
+ if (_column >= columns()){
+ #if 0
+ if (_row == 0){
+ _column = 0;
+ _row++;
+ }
+ else{
+ _row = 0;
+ _column = 0;
+ }
+ #endif
+ }
+}
+
+void LCD::setCursorMode( int mode )
+{
+ if (mode)
+ {
+ if(_row < 2)
+ writeCommand(LCD_setDisplayBlink,1,0);
+ else
+ writeCommand(LCD_setDisplayBlink,0,1);
+
+ }
+ else
+ {
+ writeCommand(LCD_setDisplayOn,1,1);
+ }
+}
+
+void LCD::dump(Serial * pc) {
+
+ fprintf(stdout,"\n\r");
+ fprintf(stdout,"----------------------------------------------\n\r");
+ for (int i=0;i<rows();i++)
+ {
+ fprintf(stdout,"[%d]",i);
+ for (int j=0;j<columns();j++)
+ {
+ fprintf(stdout,"%c",displayBuffer[i][j]);
+ }
+ fprintf(stdout,"\n\r");
+ }
+ fprintf(stdout,"\n\r");
+}
\ No newline at end of file