lcd with stellaris launchpad

lcd_stellaris_launchpad.c

/*16x2 lcd with stellaris launchpad...
/----------------------------------------/
CONNECTION TIPS:
RS: PF1
EN:PF2
DATA: PD0 - PD3 to d4 to d7 in lcd respectively
VDD (POWER): connect 5v supply to LCD from the launchpad itself (one of the 3 connection near the switch)
R/W: Ground it
Remaining LCD pins (d0 to d4): Leave it as it is ie floating
VEE of LCD: Pull down using 1K resistor (connect to ground using 1K resistor)
/---------------------------------------/
Author: Vinod S
website: http://blog.vinu.co.in
*/


#include "inc/lm4f120h5qr.h"
#include "inc/hw_gpio.h"
#include "inc/hw_memmap.h"
#include "inc/hw_sysctl.h"
#include "inc/hw_types.h"
#include "driverlib/gpio.h"
#include "driverlib/rom.h"
#include "driverlib/sysctl.h"

volatile unsigned long ulLoop;

void setup()
{
//clock setup 
	ROM_SysCtlClockSet(SYSCTL_SYSDIV_8|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
	SYSCTL_RCGC2_R |= SYSCTL_RCGC2_GPIOD;
	SYSCTL_RCGC2_R |= SYSCTL_RCGC2_GPIOF;
//lcd connections init
	ulLoop = SYSCTL_RCGC2_R;
	GPIO_PORTD_DIR_R = 0xff;
	GPIO_PORTD_DEN_R = 0xff;
	GPIO_PORTF_DIR_R = 0xff;
	GPIO_PORTF_DEN_R = 0xff;
}


#define RS(X)     GPIO_PORTF_DATA_R = ((GPIO_PORTF_DATA_R & ~(1<<1)) | (X<<1))
#define EN(X)     GPIO_PORTF_DATA_R = ((GPIO_PORTF_DATA_R & ~(1<<2)) | (X<<2))
#define LCD_STROBE do{EN(1);EN(0);}while(0)
#define databits GPIO_PORTD_DATA_R  // P1.7 - D7, ....., P1.4 - D4
#define LINE1 cmd(0x80)
#define LINE2 cmd(0xc0)

  
void data(unsigned char c)
{
    RS(1);
    SysCtlDelay(400);  
    databits = c >>4;
    LCD_STROBE;
    databits = c;
    LCD_STROBE;
}
 
void cmd(unsigned char c)
{
    RS(0);
    SysCtlDelay(400); 
    databits = c >>4;
    LCD_STROBE;
    databits = c;
    LCD_STROBE;
}
 
void pseudo_8bit_cmd(unsigned char c)
{
    RS(0);
    SysCtlDelay(15000);
    databits = (c);
    LCD_STROBE;
}
void clear(void)
{
    cmd(0x01);
    SysCtlDelay(30000);
}
 
void lcd_init()
{
    pseudo_8bit_cmd(0x30); //this command is like 8 bit mode command
    pseudo_8bit_cmd(0x30); //lcd expect 8bit mode commands at first
    pseudo_8bit_cmd(0x30); //for more details, check any 16x2 lcd spec
    pseudo_8bit_cmd(0x20);
    cmd(0x28);             //4 bit mode command started, set two line
    cmd(0x0c);             // Make cursorinvisible
    clear();               // Clear screen
    cmd(0x6);              // Set entry Mode(auto increment of cursor)
}
 
void string(char *p)
{
    while(*p) data(*p++);
}
 
int main()
{
	while(1) {
		setup();
		lcd_init();
		LINE1;
		string("Stellaris |====>");
		LINE2;
		string("|====> Launchpad");
		SysCtlDelay(50000);
		RS(0);
		while(1);
	}
}

how do you calculate the sysctldelay? like how many milliseconds? i need to get a 10ms delay

Hello. I tried to debug it on the Tiva Launchpad, wich has the TM4C123GH6PM Microcontroller. The problem is that the code doesn't anything. If you can help me I'd be very glad and also will thank you very much.