Garbage LCD Code

1 files changed, 71 insertions, 3 deletions

diff --git a/lcd.c b/lcd.c
index ccc9d52..2deb80c 100644
--- a/lcd.c
+++ b/lcd.c
@@ -1,7 +1,75 @@
 #include <avr/io.h>
+#include <util/delay.h>
 
-int
-main()
-{
+// Define LCD control pin connections
+#define LCD_RS_PIN   PB0
+#define LCD_RW_PIN   PB1
+#define LCD_E_PIN    PB2
+// Define LCD data pin connections
+#define LCD_DATA_PORT PORTD
+#define LCD_DATA_DDR  DDRD
 
+// Function prototypes
+void LCD_init();
+void LCD_command(uint8_t cmd);
+void LCD_write(uint8_t data);
+void LCD_send(char* str);
+
+int main() {
+    // Set control pins as outputs
+    DDRB |= (1 << LCD_RS_PIN) | (1 << LCD_RW_PIN) | (1 << LCD_E_PIN);
+    // Set data pins as outputs
+    LCD_DATA_DDR = 0xFF;
+
+    // Initialize LCD
+    LCD_init();
+
+    // Display "Hello, World!"
+    LCD_send("Hello, World!");
+
+    while (1) {
+        // Your main code here
+    }
+
+    return 0;
+}
+
+// Initialize LCD
+void LCD_init() {
+    _delay_ms(15);  // Delay for power-on
+    LCD_command(0x38);  // Function Set: 8-bit data, 2-line display, 5x8 font
+    LCD_command(0x0C);  // Display ON, Cursor OFF, Blink OFF
+    LCD_command(0x01);  // Clear display
+    _delay_ms(2);  // Delay for Clear Display command
+    LCD_command(0x06);  // Entry Mode Set: Increment cursor, No display shift
 }
+
+// Send command to LCD
+void LCD_command(uint8_t cmd) {
+    LCD_RS_PORT &= ~(1 << LCD_RS_PIN);  // Set RS low for command mode
+    LCD_RW_PORT &= ~(1 << LCD_RW_PIN);  // Set RW low for write mode
+    LCD_DATA_PORT = cmd;  // Send command to data port
+    LCD_E_PORT |= (1 << LCD_E_PIN);  // Enable LCD
+    _delay_us(1);  // Short delay
+    LCD_E_PORT &= ~(1 << LCD_E_PIN);  // Disable LCD
+    _delay_us(100);  // Delay for command execution
+}
+
+// Write data to LCD
+void LCD_write(uint8_t data) {
+    LCD_RS_PORT |= (1 << LCD_RS_PIN);  // Set RS high for data mode
+    LCD_RW_PORT &= ~(1 << LCD_RW_PIN);  // Set RW low for write mode
+    LCD_DATA_PORT = data;  // Send data to data port
+    LCD_E_PORT |= (1 << LCD_E_PIN);  // Enable LCD
+    _delay_us(1);  // Short delay
+    LCD_E_PORT &= ~(1 << LCD_E_PIN);  // Disable LCD
+    _delay_us(100);  // Delay for data execution
+}
+
+// Send string to LCD
+void LCD_send(char* str) {
+    while (*str) {
+        LCD_write(*str++);
+    }
+}
+