Full LCD setup with buttons A5 and A4 working!

1 files changed, 146 insertions, 63 deletions

diff --git a/lcd.c b/lcd.c
index 5b8866a..d5da485 100644
--- a/lcd.c
+++ b/lcd.c
@@ -1,49 +1,60 @@
-#include <avr/io.h>    //standard AVR header
-
-#define F_CPU 16000000UL        // THE CPU FREQUENCY 
+#include <avr/io.h>             //standard AVR header
+#define F_CPU 16000000UL        // THE CPU FREQUENCY
 #include <util/delay.h>         //delay header
-
-#define LCD_DPRT        PORTD   //LCD DATA PORT 
-#define LCD_DDDR        DDRD    //LCD DATA DDR
-#define LCD_DPIN        PIND    //LCD DATA PIN
-#define LCD_CPRT        PORTB   //LCD COMMANDS PORT
-#define LCD_CDDR        DDRB    //LCD COMMANDS DDR
-#define LCD_CPIN        PINB    //LCD COMMANDS PIN
-#define LCD_RS  0               //LCD RS
-#define LCD_EN  1               //LCD EN
-
-void lcd_putValue(unsigned char val){
+#include <avr/interrupt.h>      //interrupt header
+
+#define LCD_DPRT PORTD          //LCD DATA PORT
+#define LCD_DDDR DDRD           //LCD DATA DDR
+#define LCD_DPIN PIND           //LCD DATA PIN
+#define LCD_CPRT PORTB          //LCD COMMANDS PORT
+#define LCD_CDDR DDRB           //LCD COMMANDS DDR
+#define LCD_CPIN PINB           //LCD COMMANDS PIN
+#define LCD_RS 0                //LCD RS
+#define LCD_EN 1                //LCD EN
+                                
+// Define your buffer sizes
+#define SERIAL_BUFFER_SIZE 20
+#define NOTES_BUFFER_SIZE 20
+
+// Global variables
+char serialBuffer[SERIAL_BUFFER_SIZE];
+char notesBuffer[NOTES_BUFFER_SIZE];
+int serialIndex = 0;
+int notesIndex = 0;
+volatile int buttonState = 0; // Holds the state of all buttons
+void lcd_putValue(unsigned char val)
+{
         LCD_DPRT &= 0x0F;
-        LCD_DPRT |= (val&0xF0);         //send cmnd to data port
-        LCD_CPRT |= (1<<LCD_EN);                //EN = 1 for H-to-L pulse
-        _delay_us(1);                           //wait to make enable wide
-        LCD_CPRT &= ~ (1<<LCD_EN);      //EN = 0 for H-to-L pulse
-        _delay_us(100);                 //wait to make enable wide
-
+        LCD_DPRT |= (val & 0xF0);       //send cmnd to data port
+        LCD_CPRT |= (1 << LCD_EN);      //EN = 1 for H-to-L pulse
+        _delay_us(1);           //wait to make enable wide
+        LCD_CPRT &= ~(1 << LCD_EN);     //EN = 0 for H-to-L pulse
+        _delay_us(100);         //wait to make enable wide
         LCD_DPRT &= 0x0F;
-        LCD_DPRT |= val<<4;                     //send cmnd to data port
-        LCD_CPRT |= (1<<LCD_EN);                //EN = 1 for H-to-L pulse
-        _delay_us(1);                           //wait to make enable wide
-        LCD_CPRT &= ~ (1<<LCD_EN);      //EN = 0 for H-to-L pulse
-        _delay_us(100);                 //wait to make enable wide      
+        LCD_DPRT |= val << 4;   //send cmnd to data port
+        LCD_CPRT |= (1 << LCD_EN);      //EN = 1 for H-to-L pulse
+        _delay_us(1);           //wait to make enable wide
+        LCD_CPRT &= ~(1 << LCD_EN);     //EN = 0 for H-to-L pulse
+        _delay_us(100);         //wait to make enable wide
 }
 
 //*******************************************************
-void lcdCommand( unsigned char cmnd ){  
-        LCD_CPRT &= ~ (1<<LCD_RS);              //RS = 0 for command    
+void lcdCommand(unsigned char cmnd)
+{
+        LCD_CPRT &= ~(1 << LCD_RS);     //RS = 0 for command
         lcd_putValue(cmnd);
 }
 
 //*******************************************************
-void lcdData( unsigned char data )
+void lcdData(unsigned char data)
 {
-        LCD_CPRT |= (1<<LCD_RS);                //RS = 1 for data       
-        lcd_putValue(data);      
+        LCD_CPRT |= (1 << LCD_RS);      //RS = 1 for data
+        lcd_putValue(data);
 }
 
 void lcd_clear()
 {
-        lcdCommand(0x01);       
+        lcdCommand(0x01);
         _delay_us(1700);
 }
 
@@ -63,65 +74,137 @@ void lcd_hideCursor()
 void lcd_init()
 {
         LCD_DDDR |= 0xF0;
-        LCD_CDDR |= (1<<LCD_RS)|(1<<LCD_EN);
- 
-        LCD_CPRT &=~(1<<LCD_EN);        //LCD_EN = 0
+        LCD_CDDR |= (1 << LCD_RS) | (1 << LCD_EN);
+        LCD_CPRT &= ~(1 << LCD_EN);     //LCD_EN = 0
         _delay_us(2000);        //wait for init.
-
         lcdCommand(0x33);       //send $33 for init.
         lcdCommand(0x32);       //send $32 for init
         lcdCommand(0x28);       //init. LCD 2 line,5*7 matrix
         lcdCommand(0x0e);       //display on, cursor on
         lcdCommand(0x06);       //shift cursor right
-
-        lcd_clear();            
+        lcd_clear();
 }
 
 //*******************************************************
 void lcd_gotoxy(unsigned char x, unsigned char y)
-{  
-        unsigned char firstCharAdr[]={0x80,0xC0,0x94,0xD4};//Table 12-4  
-        lcdCommand(firstCharAdr[y-1] + x - 1);
-        _delay_us(100); 
+{
+        unsigned char firstCharAdr[] = { 0x80, 0xC0, 0x94, 0xD4 };      //Table 12-4
+        lcdCommand(firstCharAdr[y - 1] + x - 1);
+        _delay_us(100);
 }
 
 //*******************************************************
-void lcd_print( char * str )
+void lcd_print(char *str)
 {
         unsigned char i = 0;
-
-        while(str[i] != 0) //while it is not end of string
+        while (str[i] != 0)     //while it is not end of string
         {
                 lcdData(str[i]);
-                i++ ;
+                i++;
         }
 }
 
+char getSerialData() {
+    // Read serial data and return it
+    return ' ';
+}
+
+char getNote() {
+    // Read notes data and return it
+    return ' ';
+}
+
+void setup() {
+    // Initialize Serial communication
+    // Initialize LCD
+    // Initialize buttons as inputs
+    // Set pins A4 and A5 as inputs with pull-up resistors enabled
+    DDRC &= ~((1 << DDC4) | (1 << DDC5));
+    PORTC |= (1 << PORTC4) | (1 << PORTC5);
+
+    // Enable Pin Change Interrupt on pins PC4 and PC5
+    PCMSK1 |= (1 << PCINT12) | (1 << PCINT13); // Enable PCINT for pins PC4 and PC5
+    PCICR |= (1 << PCIE1); // Enable Pin Change Interrupt 1
+    sei(); // Enable global interrupts
+}
+
+ISR(PCINT1_vect) {
+    // Update button state when any pin changes state
+    for (unsigned char i = 0; i <= 5; i++) {
+            if (PINC & (1 << i)) {
+                    buttonState = i;
+                    break;
+            }
+    }
+}
+
+void displaySerialData() {
+    lcd_clear();
+    lcd_gotoxy(1, 1);
+    while (!(buttonState == 5)) {
+        char newData = getSerialData();
+        if (newData != '\0') {
+            // Add new data to the left side of line 1 of the LCD
+            // Push existing data to the right
+            // Display on LCD
+        }
+        _delay_ms(100); // Adjust delay as needed
+    }
+}
+
+void displayNotes() {
+    lcd_clear();
+    lcd_gotoxy(1, 1);
+    while (buttonState == 4) {
+        char newNote = getNote();
+        if (newNote != '\0') {
+            // Add new note to the right side of line 1 of the LCD
+            // Push existing notes to the left
+            // Display on LCD
+        }
+        _delay_ms(1000); // Adjust delay as needed
+    }
+}
+
 //*******************************************************
-int main(void) 
-{       
+int main(void) {
+        lcd_init();
         lcd_init();
         lcd_hideCursor();
-        
-        while(1)
-        {       
+
+        setup();
+        lcd_clear();
+        while (1) {
+                // Check button state and perform actions accordingly
+                if (buttonState == 5) {
+                        lcd_clear();
+                        lcd_gotoxy(1,1);
+                        lcd_print("Button A5 Works");
+                        _delay_ms(100);
+                        //displaySerialData();
+                } else if (buttonState == 4) {
+                        lcd_clear();
+                        lcd_gotoxy(1,2);
+                        lcd_print("Button A4 Works");
+                        _delay_ms(100);
+                        //displayNotes();
+                }
+        }
+        return 0;
+        /*while (1) {
                 lcd_clear();
-                lcd_gotoxy(1,1);
-                lcd_print("The world is but");
-                lcd_gotoxy(1,2);
+                lcd_gotoxy(1, 1);
+                lcd_print("Note 1:");
+                lcd_gotoxy(1, 2);
                 lcd_print("one country");
-
                 lcd_showCursor();
                 _delay_ms(2500);
-        
                 lcd_clear();
-        
-                lcd_gotoxy(1,1);
+                lcd_gotoxy(1, 1);
                 lcd_print("and mankind its");
-                lcd_gotoxy(1,2);
-                lcd_print("citizens."); 
-                _delay_ms(3500);        
+                lcd_gotoxy(1, 2);
+                lcd_print("citizens.");
+                _delay_ms(3500);
         }
-
-        return 0;
-}
\ No newline at end of file
+        return 0;*/
+}