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/*------------------------------ CHUONG TRINH GIAO TIEP LCD------------------------------- */
// Cac chan dung cho giao tiep LCD
//P0.0 - P0.7 = D0 - D7
//P0.8 = LCD_EN
//P0.9 = LCD_RS
//P0.10 = LCD_RW
/* Include file */
#include <LPC214x.h>
/* Define LCD PinIO Mask */
#define LCD_EN 0x00000100 // P0.8(0000 0000 0000 0000 0000 000x 0000 0000)
#define LCD_RS 0x00000200 // P0.9(0000 0000 0000 0000 0000 00x0 0000 0000)
#define LCD_RW 0x00000400 // P0.10(0000 0000 0000 0000 0000 0x00 0000 0000)
#define LCD_BUS 0x000000ff // P0.0-P0.7(0000 0000 0000 0000 0000 0000 xxxx xxxx)
#define lcd_en_set() IOSET0 = LCD_EN // EN = 1 (Enable)
#define lcd_en_clr() IOCLR0 = LCD_EN // EN = 0 (Disable)
#define lcd_rs_set() IOSET0 = LCD_RS // RS = 1 (Select Instruction mode)
#define lcd_rs_clr() IOCLR0 = LCD_RS // RS = 0 (Select Data mode)
#define lcd_rw_set() IOSET0 = LCD_RW // RW = 1 (Read)
#define lcd_rw_clr() IOCLR0 = LCD_RW // RW = 0 (Write)
/* Chon chieu cac IO pins giao tiep LCD*/
#define lcd_dir_write() IODIR0 |= 0x000007ff //(0000 0000 0000 0000 0000 0xxx xxxx xxxx)
#define lcd_dir_read() IODIR0 &= 0xffffff00 //(0000 0000 0000 0000 0000 0000 xxxx xxxx)
/* Define cac thao tac co ban voi LCD */
#define lcd_clear() lcd_write_control(0x01) // Clear Display
#define lcd_cursor_home() lcd_write_control(0x02) // Set Cursor = 0
#define lcd_display_on() lcd_write_control(0x0E) // LCD Display Enable
#define lcd_display_off() lcd_write_control(0x08) // LCD Display Disable
#define lcd_display_blink() lcd_write_control(0x0F) // Set Cursor = Blink
#define lcd_cursor_on() lcd_write_control(0x0E) // Enable LCD Cursor
#define lcd_cursor_off() lcd_write_control(0x0C) // Disable LCD Cursor
#define lcd_cursor_left() lcd_write_control(0x10) // Shift Left Cursor
#define lcd_cursor_right() lcd_write_control(0x14) // Shift Right Cursor
#define lcd_display_sleft() lcd_write_control(0x18) // Shift Left Display
#define lcd_display_sright() lcd_write_control(0x1C) // Shift Right Display
/* prototype */
void lcd_init(void); // Initial LCD
void lcd_write_control(unsigned char); // Write Instuction to LCD
void lcd_write_ascii(unsigned char); // Write LCD Display(ASCII)
void goto_vitri(unsigned char); // Set Position Cursor LCD
void lcd_hienthi(unsigned char*); // Print Display to LCD
char busy_lcd(void); // Read Busy LCD Status
void enable_lcd(void); // Enable Pulse
void delay(unsigned long int); // Delay Function
/* Chuong trinh chinh */
int main(void)
{
lcd_init(); // Initial LCD
// Loop Print Message to LCD16 x 2 //
while(1) // Loop Continue
{
goto_vitri(0x80); // Set Cursor Line-1
lcd_hienthi("ngay 15/06/09"); // Display LCD Line-1
goto_vitri(0xC0); // Set Cursor = Line-2
lcd_hienthi("Chuong trinh LCD"); // Display LCD Line-2
delay(5000000); // Display Delay
lcd_clear();
goto_vitri(0x80); // Set Cursor Line-1
lcd_hienthi("LPC2148-NXP"); // Display LCD Line-1
goto_vitri(0xC0); // Set Cursor = Line-2
lcd_hienthi("EASY ARM!!!"); // Display LCD Line-2
delay(5000000); // Display Delay
lcd_clear();
goto_vitri(0x80); // Set Cursor Line-1
lcd_hienthi("Tac gia viet:"); // Display LCD Line-1
goto_vitri(0xC0); // Set Cursor = Line-2
lcd_hienthi("killer_hung yen"); // Display LCD Line-2
delay(5000000); // Display Delay
lcd_clear();
}
}
/******************************************************/
/* Initial LCD : 8bit,2-line display,5x7 dot charater */
/******************************************************/
void lcd_init()
{
//unsigned int i; // bien delay
PINSEL0 = 0x00000000; // GPIO cho cac pin P0.0 den P0.15(chon cac chan o Pinsel 0)
IODIR0 = 0x000007ff; // P0.0-P0.10 la output(gan cac chan p0.0-p0.10 lam dau ra)
delay(100000); // Power-On Delay (15 mS)
/* Check LCD*/
IOSET0 = 0x000007ff; // Reset all pins
IOCLR0 = 0x00000030; // D5:D4 = 11 (0000 0000 0000 0000 0000 0000 0011 0000)
enable_lcd(); // Xung enable cho LCD
delay(100000); // Delay 4.1ms
IOCLR0 = 0x000007ff; // Reset all pins
IOSET0 = 0x00000030; // D5:D4 = 11
enable_lcd();
while(busy_lcd()); // Xung enable cho LCD
delay(100000); // Delay 100 ms
IOCLR0 = 0x000007ff;
IOSET0 = 0x00000030;
enable_lcd();
while(busy_lcd()); //Wait LCD Execute complete
IOCLR0 = 0x000007ff;
IOSET0 = 0x00000030;
enable_lcd();
while(busy_lcd()); //Wait LCD Execute complete
/* Config cho LCD */
//lcd_write_control(0x30);
lcd_write_control(0x38); // Function Set (DL=1 8-Bit,N=1 2 Line,F=0 5X7)
lcd_write_control(0x0C); // Display on/off Control (Entry Display,Cursor off,Cursor not Blink)
//lcd_write_control(0x06); // Entry Mode Set (I/D=1 Increment,S=0 Cursor Shift)
//lcd_write_control(0x01); // Clear Display (Clear Display,Set DD RAM Address=0)
delay(100000); // Wait Command Ready
}
/************************/
/* thiet lap vi tri nhap nhay cua control*/
/************************/
void goto_vitri(unsigned char i)
{
i |= 0x80; // Set DD-RAM Address Command
lcd_write_control(i);
}
/******************************/
/* Write construction to LCD */
/******************************/
void lcd_write_control(unsigned char val)
{
//unsigned int i;
lcd_rs_clr();
lcd_rw_clr(); // RS = 0 = Instruction Select
IOCLR0 = LCD_BUS; // Reset Data pins RS=0
IOSET0 = (val & LCD_BUS); // write value
enable_lcd(); // Xung enable LCD
while(busy_lcd()); // Wait LCD Execute Complete
delay(100000); // Wait Command Ready
}
/*********************************/
/* Write ascii character to LCD */
/********************************/
void lcd_write_ascii(unsigned char val)
{
unsigned int i;
lcd_rs_set();
lcd_rw_clr(); // RS = 1 = Data Select
IOCLR0 = LCD_BUS; // Reset Data pins
IOSET0 = (val & LCD_BUS); // write value
enable_lcd(); // Xung enable LCD
while(busy_lcd()); // Wait LCD Execute Complete
delay(100000); // Wait Command Ready
}
/************************************/
/* Print Display Data(ASCII) to LCD */
/************************************/
void lcd_hienthi(unsigned char* str)
{
int i;
for (i=0;i<=16 && str[i]!=0;i++)
{ // 16 Character Print
lcd_write_ascii(str[i]);
} // Print Byte to LCD
}
/******************/
/* Wait LCD Ready */
/******************/
/*char busy_lcd(void)
{
unsigned long busy_status; // Busy Status Read
unsigned int i; // Delay Count
lcd_dir_read(); // LCD Data Bus = Read
lcd_rs_clr(); // Instruction Select
lcd_rw_set(); // Read Direction
lcd_en_set(); // Start Read Busy
for (i=0;i<100;i++); // Delay Before Read
busy_status = (IOPIN0 & 0x00000080); // D7 la busy flag
if(busy_status == 0x00800000) // Read & Check Busy Flag
{
lcd_en_clr(); // Disable Read
lcd_rw_clr(); // Default = Write Direction
lcd_dir_write(); // LCD Data Bus = Write
return 1; // LCD Busy Status
}
else
{
lcd_en_clr(); // Disable Read
lcd_rw_clr(); // Default = Write Direction
lcd_dir_write(); // LCD Data Bus = Write
return 0; // LCD Ready Status
}
}*/
/***********************/
/* Enable Pulse to LCD */
/***********************/
void enable_lcd(void) // Enable Pulse
{
//unsigned int i; // Delay Count
lcd_en_set(); // Enable ON (EN=1)
delay(100000);
lcd_en_clr(); // Enable OFF(EN=0)
}
/***********************/
/* Delay Time Function */
/* 1-4294967296 */
/***********************/
void delay(unsigned long int count1)
{
while(count1 > 0) {count1--;} // Loop Decrease Counter
}
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