commit 90d226a838a5c7f2d6ea86a529241b3f571f7130
parent 9f6c3500159cd828d633345d1fb39250b4e5669b
Author: Joseph Bryant <jbryant0653@floridapoly.edu>
Date: Wed, 17 Apr 2024 15:33:18 -0400
Garbage LCD Code
Diffstat:
| M | lcd.c | | | 74 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--- |
1 file changed, 71 insertions(+), 3 deletions(-)
diff --git 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++);
+ }
+}
+
