girish09
Junior Member level 2
I am using ARM LPC 2294, i have interfaced LCD and keypad for keypad interfacing i have used interrupt method (because my schematic is like that so i have to write code like that only)....my LCD is working properly but my program is not going into interrupt function, as i have checked this using Debugging the code, what am i supposed to do, Please help me i am beginner in ARM programming, my hardware is ok......waiting for your kind help
my code is as follows
and interrupt function is as follows
my code is as follows
Code:
//#include "stdio.h"
#include "lpc210x_gnuarm.h"
#include "delay.h"
#include "INTERRUPT.C"
#include "string.h"
#include "lpc22xx.h"
void wait_us (unsigned long);
void GPIO_Port_Low(unsigned int);
void GPIO_Port_High(unsigned int);
void GPIO_Set_Port(unsigned int , unsigned int);
void disp_cmd(unsigned char);
void disp_write(unsigned char);
void lcd_init(void);
#define DISP_FUNC 0x28 // sets the display to 4-bit, 2 lines, 5x7 chars + cursor-off
#define DISP_ENTRY 0x06
#define DISP_CNTL 0x08
#define DISP_ON 0x04
#define DISP_CURSOR 0x02
#define DISP_CLEAR 0x01
#define DISP_HOME 0x02
#define DISP_POS 0x80
#define DISP_BLINK 0x01
#define DISPDATA_MASK 0x000000F0 // four(!) bit data bus to the display panel connected to GPIO[12..15]
//#define DISPDATA_MASK 0x00000F00
//#define ENABLE_MASK 1<<4 // enable connected to GPIO[4]
//#define REGSEL_MASK 1<<5 // REGSEL connected to GPIO[5]
#define ENABLE_MASK 1<<9 //toggal BIT for testing BY SP
#define REGSEL_MASK 1<8 //toggal BIT for testing BY SP
#define LCD_CS 1<<11 //toggal BIT for testing BY SP
//#include "uart0.h"
#define KEY_2 0x0B
#define KEY_F1 0x04
#define KEY_0 0x08
#define KEY_F2 0x0C
#define KEY_7 0x05
#define KEY_8 0x09
#define KEY_9 0x0D
#define KEY_4 0x06
#define KEY_5 0x0A
#define KEY_6 0x0E
#define KEY_MENU 0x13
#define KEY_UP 0x12
#define KEY_DOWN 0x11
#define KEY_ENTER 0x10
#define KEY_1 0x07
#define KEY_3 0x0F
#define KEY_ESC 0x03
#define KEY_START 0x02
#define KEY_STOP 0x01
#define KEY_F3 0x00
//#include<LPC22XX.h>
//#include<stdio.h>
//#include "stdio.h"
//
unsigned char i=0,keycode,temp2; //Variable Declarations
//Function Prototype
void scancode(long,long);
void initSerial(void);
void initInterrupt(void);
void key_detect(void);
void gpioInit(void)
{
PCB_PINSEL0 = 0x00000000;
IODIR1 = (1<<25); //KEY_READ
IOCLR1 = 0xFFFFFFFF;
IODIR2 = 0x000000E0; //changed for debugging
IOCLR2 = 0xFFFFFFFF;
}
void initSerial(void)
{
PCB_PINSEL0=0x00050000;
UART1_LCR=0x83;
UART1_DLL=0x86;
UART1_DLM=0x01;
UART1_LCR=0x3;
}
void initInterrupt()
{
//IOSET2 = 0xffffffff;
PCB_PINSEL1 = PCB_PINSEL1 | 0x00000001; ///////////EINT0 = Pin P0.16////////
EXTMODE = 0x00000000;
EXTPOLAR = 0x00000000;
//VICVectAddr0 = (unsigned long) external ;
VICVectAddr0 = (unsigned)EXTINTVectoredIRQ;
VICVectCntl0 = 0x0000002E ;
VICIntEnable = VICIntEnable | 0x00004000;
}
void display(char arr[])
{
int i=0;
disp_cmd(0x80);
wait_us(500);
disp_cmd(0x02);
for(i=0;arr[i]!='\0';i++)
{
if(arr[i])
{
disp_write(arr[i]);
wait_us(500);
}
else
return;
}
}
/*
disp_cmd(0xd0);
wait_us(500);
disp_cmd(0x02);
for(i=16;i<32;i++)
{
if(arr[i])
{
disp_write(arr[i]);
wait_us(500);
}
else
return;
} */
void key_detect()
{
//keycode=0xf8;
wait_us(100); //wait 20msec debounce time
switch (keycode)
{
//* ************************** (ONE) 1 KEY ************************ *
case KEY_0 :display("*****KEY 0 PRESSED*****\n");
break;
case KEY_1 :display("*****KEY 1 PRESSED*****\n");
break;
case KEY_2 :display("*****KEY 2 PRESSED*****\n");
break;
case KEY_3 :display("*****KEY 3 PRESSED*****\n");
break;
case KEY_4 :display("*****KEY 4 PRESSED*****\n");
break;
case KEY_5 :display("*****KEY 5 PRESSED*****\n");
break;
case KEY_6 :display("*****KEY 6 PRESSED*****\n");
break;
case KEY_7 :display("*****KEY 7 PRESSED*****\n");
break;
case KEY_8 :display("*****KEY 8 PRESSED*****\n");
break;
case KEY_9 :display("*****KEY 9 PRESSED*****\n");
break;
case KEY_F1 :display("*****KEY F1 PRESSED*****\n");
break;
case KEY_F2 :display("*****KEY F2 PRESSED*****\n");
break;
case KEY_F3 :display("*****KEY F3 PRESSED*****\n");
break;
case KEY_MENU :display("*****KEY MENU PRESSED*****\n");
break;
case KEY_UP :display("*****KEY UP PRESSED*****\n");
break;
case KEY_DOWN :display("*****KEY DOWN PRESSED*****\n");
break;
case KEY_ENTER :display("*****KEY ENTER PRESSED*****\n");
break;
case KEY_ESC :display("*****KEY ESC PRESSED*****\n");
break;
case KEY_START :display("*****KEY START PRESSED*****\n");
break;
case KEY_STOP :display("*****KEY STOP PRESSED*****\n");
break;
}
}
/*###################################################*/
// LCD code
// LCD code
void wait_us (unsigned long usdelay )
{
usdelay = usdelay*10;
while(--usdelay);
}
void GPIO_Port_Low(unsigned int value)
{
IOCLR2 = value; // clear zeros'
wait_us(500); // slow down timing for LCD compatibility
}
void GPIO_Port_High(unsigned int value){
IOSET2 = value; // set ones'
wait_us(500); // slow down timing for LCD compatibility
}
void GPIO_Set_Port(unsigned int mask, unsigned int value)
{
IOCLR2 = LCD_CS;
IOSET2 = mask & value; // set ones'
IOCLR2 = mask & (~value); // clear zeros'
wait_us(500); // slow down timing for LCD compatibility
IOSET2 = LCD_CS;
}
void disp_cmd(unsigned char cmd)
{
IODIR2 = (IODIR2 | DISPDATA_MASK | REGSEL_MASK | ENABLE_MASK | LCD_CS); // set ports to outputs
GPIO_Set_Port(DISPDATA_MASK, cmd & 0XF0); // latch the command
GPIO_Port_Low(REGSEL_MASK); // select the command reg = 0
wait_us(500);
GPIO_Port_High(ENABLE_MASK); // latch the command into the LCD panel = 1 - first nibble
wait_us(500);
GPIO_Port_Low(ENABLE_MASK); // ENABLE=0;
wait_us(500);
GPIO_Set_Port(DISPDATA_MASK, cmd << 4); // latch the command
wait_us(500);
GPIO_Port_High(ENABLE_MASK); // latch the command into the LCD panel = 1 - second nibble
wait_us(500);
GPIO_Port_Low(ENABLE_MASK); // ENABLE=0;
}
void disp_write(unsigned char value)
{
IODIR2 = IODIR2 | DISPDATA_MASK | REGSEL_MASK | ENABLE_MASK | LCD_CS; // select write mode RDWR=0
GPIO_Set_Port(DISPDATA_MASK, value & 0XF0); // latch the data upper nibble
GPIO_Port_High(REGSEL_MASK); // select the command reg = 1 select data reg
wait_us(500);
GPIO_Port_High(ENABLE_MASK); // latch the command into the LCD panel = 1
wait_us(500);
GPIO_Port_Low(ENABLE_MASK); // ENABLE=0;
wait_us(500);
GPIO_Set_Port(DISPDATA_MASK, value << 4); // latch the data lower nibble
wait_us(500);
GPIO_Port_High(ENABLE_MASK); // latch the command into the LCD panel = 1
wait_us(500);
GPIO_Port_Low(ENABLE_MASK); // ENABLE=0;
}
void lcd_init(void)
{
unsigned char counter;
IODIR2 = IODIR2 | DISPDATA_MASK | REGSEL_MASK |ENABLE_MASK | LCD_CS; // select port direction=output
for (counter = 0; counter <3; counter++)
{
GPIO_Set_Port(DISPDATA_MASK, (0x20)); // latch the command 0x30
GPIO_Port_Low(REGSEL_MASK); // select the command reg REGSEL=0
wait_us(500);
GPIO_Port_High(ENABLE_MASK); // latch the command into the LCD panel = 1
wait_us(500);
GPIO_Port_Low(ENABLE_MASK); // latch the command into the LCD panel ENABLE=0
wait_us(500); // wait for LCD
}
wait_us(500); // wait for LCD to reset itself
disp_cmd(0x28);
wait_us(500);
disp_cmd(0x0C);
wait_us(500);
disp_cmd(0x01);
wait_us(500);
disp_cmd(0x06);
wait_us(500);
disp_cmd(0x02);
wait_us(500);
disp_cmd(0x10);
wait_us(500);
/* for (counter = 0; counter <3; counter++)
{
GPIO_Set_Port(DISPDATA_MASK, (0x0020)); // latch the command 0x30
GPIO_Port_Low(REGSEL_MASK); // select the command reg REGSEL=0
wait_us(0XFF);
GPIO_Port_High(ENABLE_MASK); // latch the command into the LCD panel = 1
wait_us(0XFF);
GPIO_Port_Low(ENABLE_MASK); // latch the command into the LCD panel ENABLE=0
wait_us(0XFF); // wait for LCD
}
//**********************ENTRY ENTRY ENTRY ****************************
wait_us(0XFF); // wait for LCD
disp_cmd(DISP_FUNC); // set the display for an 8
// bit bus, 2 display lines,
// and a 5x7 dot font
wait_us(0XFF); // wait for LCD
disp_cmd(DISP_CNTL | DISP_ON ); // turn the display on, cursor off
wait_us(0XFF); // wait for LCD
//*********************Added Function **************************************
disp_cmd(0x14);
wait_us(0XFF);
disp_cmd(DISP_CLEAR); // clear the display
wait_us(0XFF); // wait for LCD
disp_cmd(DISP_ENTRY); // set the character entry
// mode to increment display
// address for each
// character, but not to scroll
wait_us(0XFF);
*/
}
void main(void)
{
//unsigned char message[] = "SUMIT EMBIN TECHNOLOGIES";
//unsigned char message[] = "TECHNOLOGY 12345";
unsigned char message[] = "ARM 32BIT BOARD Lcd 16x2 done";
//unsigned char m = 0x41;
//gpioInit();
//initSerial();
lcd_init();
gpioInit(); //Initialize the GPIo Pins
initSerial(); //initlaize the serial port
initInterrupt();
display(message);
//display("Hello World");
while(1)
{
}
}and interrupt function is as follows
Code:
extern unsigned char keycode; //Variable Declarations
extern void key_detect(void);
//void external(void) __irq // External Interrupt subroutine
void EXTINTVectoredIRQ (void) __irq
{
IOCLR1 = (1<<25);
//IOCLR2 = 0xFFFFFFFF;
keycode = IOPIN2;
//printf("%s",IOPIN2); //take data
keycode = keycode & 0x1F; // mask MSB 4 bit of port0
wait_us(200); //wait 20ms debounce time
IOSET1 = (1<<25);
EXTINT = 0x00000001;
VICVectAddr = 0x00000000;
key_detect();
//printf("%s",keycode);
}
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