I.module-A (lcd) functions : A.1 void command (unsigned char cmd)

[AbanoubMichael]

include "TM4C123.h" // Device header

void delay_milli(int n); void delay_micro(int n); void LCD_init(void); void LCD_Cmd(unsigned char command); void LCD_Data(unsigned char data);

int main() { LCD_init(); // while(1) // { LCD_Cmd(0x01); LCD_Cmd(0x80); delay_milli(500); LCD_Data('C'); delay_milli(1); LCD_Data('O'); delay_milli(1); LCD_Data('R'); delay_milli(1); LCD_Data('T'); delay_milli(1); LCD_Data('E'); delay_milli(1); LCD_Data('X'); delay_milli(1); LCD_Data('-'); delay_milli(1); LCD_Data('M'); delay_milli(1); LCD_Data('.'); delay_milli(1); LCD_Data('C'); delay_milli(1); LCD_Data('O'); delay_milli(1); LCD_Data('M'); delay_milli(500); //} } void LCD_init(void) { SYSCTL->RCGCGPIO |= 0x01; //PORTA clock SYSCTL->RCGCGPIO |= 0x02; GPIOA->DIR |= 0xE0; //PORTA controls RS,E and R/W GPIOA->DEN |= 0xE0; GPIOB->DIR |= 0xFF; //PORTB D0-D7 GPIOB->DEN |= 0xFF; //PORTB D0-D7 LCD_Cmd(0x38); //8-bits,2 display lines, 5x7 font LCD_Cmd(0x06); //increments automatically LCD_Cmd(0x0F); //Turn on display LCD_Cmd(0x01); //clear display

}

void LCD_Cmd(unsigned char command) { GPIOA->DATA = 0x00; //RS =0, E=0, RW=0 GPIOB->DATA = command; GPIOA->DATA = 0x80; //E=1 to secure command delay_micro(0); GPIOA->DATA = 0x00; if (command < 4) delay_milli(2); else delay_micro(37); } void LCD_Data(unsigned char data) { GPIOA->DATA = 0x20; //RS=1, E=0,RW=0 GPIOB->DATA = data; GPIOA->DATA |= 0x80; GPIOA->DATA = 0x00; delay_micro(0);

} void delay_milli(int n) { int i, j; for (i = 0; i < n; i++) for (j = 0; j < 3180; j++) { } }

void delay_micro(int n) { int i, j; for (i = 0; i < n; i++) for (j = 0; j < 3; j++) { } }