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| // LCD Routines for "CP-JR ARM7 USB-LPC2148"
// Character 16x2 8-Bit Mode Interface
// RS = P1.25
// RW = P1.26
// EN = P1.27
// D4 = P1.28
// D5 = P1.29
// D6 = P1.30
// D7 = P1.31
// D0 = P0.12
// D1 = P0.13
// D2 = P0.14
// D3 = P0.15
#include <LPC21xx.H> // LPC2119 MPU Register
// Define LCD PinIO Mask
#define LCD_D7 0x80000000//p1.31
#define LCD_D6 0x40000000//p1.30
#define LCD_D5 0x20000000//p1.29
#define LCD_D4 0x10000000//p1.28
#define LCD_D3 0x00008000//p0.15
#define LCD_D2 0x00004000//p0.14
#define LCD_D1 0x00002000//p0.13
#define LCD_D0 0x00001000//p0.12
#define LCD_EN 0x08000000//p1.27
#define LCD_RW 0x04000000//p1.26
#define LCD_RS 0x02000000//p1.25
#define LCD_DATA (LCD_D4|LCD_D5|LCD_D6|LCD_D7)
#define LCD_DATA2 (LCD_D0|LCD_D1|LCD_D2|LCD_D3)
#define lcd_rs_set() IOSET1 |= LCD_RS // RS = 1 (Select Instruction)
#define lcd_rs_clr() IOCLR1 |= LCD_RS // RS = 0 (Select Data)
#define lcd_en_set() IOSET1 |= LCD_EN // EN = 1 (Enable)
#define lcd_en_clr() IOCLR1 |= LCD_EN // EN = 0 (Disable)
#define lcd_rw_set() IOSET1 |= LCD_RW // RW = 1 (Enable)
#define lcd_rw_clr() IOCLR1 |= LCD_RW // RW = 0 (Disable)
#define LCD_IOALL (LCD_D7|LCD_D6|LCD_D5|LCD_D4|LCD_RS|LCD_RW|LCD_EN)
#define LCD_IOALL2 (LCD_D3|LCD_D2|LCD_D1|LCD_D0)
#define lcd_dir_write() IODIR1 |= 0xFE000000 // LCD Data Bus = Write
#define lcd_dir2_write() IODIR0 |= 0x0000F000
#define lcd_dir_read() IODIR1 &= 0x0FFFFFFF // LCD Data Bus = Read
#define lcd_dir2_read() IODIR0 &= 0xFFFF0FFF
#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_cursor_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
/* pototype section */
void lcd_out_data8(unsigned char); // Strobe 8-Bit Data to LCD
void lcd_write_byte(unsigned char); // Write 1 Byte Data to LCD
void lcd_write_control(unsigned char); // Write Instruction
void lcd_write_ascii(unsigned char); // Write LCD Display(ASCII)
void goto_cursor(unsigned char); // Set Position Cursor LCD
void lcd_print(unsigned char*); // Print Display to LCD
void delay(unsigned long int); // Delay Function
void enable_lcd(void); // Enable Pulse
char busy_lcd(void);
void lcd_init();
/* Main Program Start Here */
int main(void)
{
lcd_init();
while(1){
goto_cursor(0x00);
lcd_print(" 8bits ");
goto_cursor(0x40);
lcd_print(" essai ");
}
}
/****************************/
/* Strobe 8-Bit Data to LCD */
/****************************/
void lcd_out_data8(unsigned char val)
{
IOCLR1 |= (LCD_DATA); // Reset 4-Bit Pin Data
IOSET1 |= (((val&0xF0)>>4)<<28); IOCLR0 |= (LCD_DATA2);
IOSET0 |= (val&0x0f)<<12;
}
/****************************/
/* Write Data 1 Byte to LCD */
/****************************/
void lcd_write_byte(unsigned char val)
{
lcd_out_data8(val);
enable_lcd();
while(busy_lcd());
}
/****************************/
/* Write Instruction to LCD */
/****************************/
void lcd_write_control(unsigned char val)
{
lcd_rs_clr(); // RS = 0 = Instruction Select
lcd_write_byte(val); // Strobe Command Byte
}
/****************************/
/* Write Data(ASCII) to LCD */
/****************************/
void lcd_write_ascii(unsigned char c)
{
lcd_rs_set(); // RS = 1 = Data Select
lcd_write_byte(c); // Strobe 1 Byte to LCD
}
/************************************/
/* Print Display Data(ASCII) to LCD */
/************************************/
void lcd_print(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
}
}
/***********************/
/* Delay Time Function */
/* 1-4294967296 */
/***********************/
void delay(unsigned long int count1)
{
while(count1 > 0) {count1--;} // Loop Decrease Counter
}
/***************************/
/* Set LCD Position Cursor */
/***************************/
void goto_cursor(unsigned char i)
{
i |= 0x80; // Set DD-RAM Address Command
lcd_write_control(i);
}
/******************/
/* Wait LCD Ready */
/******************/
char busy_lcd(void)
{
unsigned long busy_status; // Busy Status Read
unsigned int i; // Delay Count
lcd_dir_read();
lcd_dir2_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<1000;i++); // Delay Before Read
busy_status = (IOPIN1 & 0x80000000); // Read LCD Data
if(busy_status == 0x80000000) // Read & Check Busy Flag
{
lcd_en_clr(); // Disable Read
lcd_rw_clr(); // Default = Write Direction
lcd_dir_write();
lcd_dir2_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_dir2_write(); // LCD Data Bus = Write
return 0; // LCD Ready Status
}
}
void lcd_init()
{
unsigned int i; // LCD Initial Delay Count
PINSEL2 = 0x00000000; // GPIO1[31..26] = I/O Function
PINSEL0 = 0x00000000;
lcd_dir_write();
lcd_dir2_write(); // LCD Data Bus = Write
for (i=0;i<50000;i++); // Power-On Delay (15 mS)
IOCLR1 = (LCD_IOALL);
IOCLR0 = (LCD_IOALL2); // Reset (RS,RW,EN,4-Bit Data) Pin
IOSET1 = (LCD_D5|LCD_D4);
enable_lcd(); // Enable Pulse
for (i=0;i<10000;i++); // Delay 4.1mS
IOCLR1 = (LCD_IOALL);
IOCLR0 = (LCD_IOALL2); // Reset (RS,RW,EN,4-Bit Data) Pin
IOSET1 = (LCD_D5|LCD_D4);
enable_lcd(); // Enable Pulse
for (i=0;i<100;i++); // delay 100uS
IOCLR1 = (LCD_IOALL);
IOCLR0 = (LCD_IOALL2); // Reset (RS,RW,EN,4-Bit Data) Pin
IOSET1 = (LCD_D5|LCD_D4);
enable_lcd(); // Enable Pulse
while(busy_lcd()); // Wait LCD Execute Complete
IOCLR1 = (LCD_IOALL);
IOCLR0 = (LCD_IOALL2); // Reset (RS,RW,EN,4-Bit Data) Pin
IOSET1 = (LCD_D5);
enable_lcd(); // Enable Pulse
while(busy_lcd()); // Wait LCD Execute Complete
delay(200);
lcd_write_control(0x38); // Function Set (DL=1 8-Bit,N=1 2 Line,F=0 5X7)
delay(50);
lcd_write_control(0x08);
delay(50);
lcd_write_control(0x0C); // Display on/off Control (Entry Display,Cursor off,Cursor not Blink)
delay(50);
lcd_write_control(0x01); // Clear Display (Clear Display,Set DD RAM Address=0)
delay(2000);
lcd_write_control(0x06); // Entry Mode Set (I/D=1 Increment,S=0 Cursor Shift)
delay(50);
for (i=0;i<100000;i++); // Wait Command Ready
}
/***********************/
/* Enable Pulse to LCD */
/***********************/
void enable_lcd(void) // Enable Pulse
{
unsigned int i; // Delay Count
lcd_en_set(); // Enable ON
for (i=0;i<50;i++);
lcd_en_clr(); // Enable OFF
} |
Besoin d aide, LCD 8bits, LPC2148
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