led_p-15

 #include<lpc214x.h>


// Function prototypes

void lcd_init(void);

void wr_cn(void);

void clr_disp(void);

void delay(unsigned int);

void lcd_com(void);    

void wr_dn(void);

void lcd_data(void);

void LCD(void);

void Extint1_Isr(void) __irq; //declaration of ISR


unsigned char int_flag, flag;


int main(void)

{

IO1DIR |= 0X02000000; //P1.25 int led

    IO1SET = 0X02000000;

    PINSEL0 =0X000000c0;          //P0.3 EINT1

  

    EXTMODE =0x01;                //edge i.e falling egge trigger and active low

    EXTPOLAR= 0X00;

    VICVectAddr0 = (unsigned long) Extint1_Isr;   //Assign the EINT0 ISR function 

    VICVectCntl0 = 0x20 | 15;      //Assign the VIC channel EINT1 to interrupt priority 0

    VICIntEnable |= 0x00008000;    //Enable the EINT1 interrupt


    while(1)                                //waiting for interrupt to occur

    {

    if(int_flag == 0x01)

{

if(flag == 0)

  {

    IO1CLR = 0X02000000;

    flag = 1;

  }

  else if(flag == 1)

  {

    IO1SET = 0x02000000;

flag = 0;

  }

  int_flag = 0x00;

}   

    }

}


void Extint1_Isr(void)__irq              //whenever there is a low edge on EINT0

{

EXTINT = 0x02; //clear the interrupt

int_flag = 0x01;

VICVectAddr=0;                        //Acknowledge Interrupt

}

Comments

Post a Comment

Popular posts from this blog

SQ_TRI_p-13

 SQUARE #include <lpc21xx.h> void delay(void); int main () { PINSEL0 = 0x00000000 ; // Configure P0.0 to P0.15 as GPIO PINSEL1 = 0x00000000 ; // Configure P0.16 to P0.31 as GPIO IO0DIR  = 0x00FF0000 ;     while(1)     {     IO0PIN = 0x00000000;         delay();         IO0PIN = 0x00FF0000;         delay();     } }    void delay(void) { unsigned int i=0;     for(i=0;i<=95000;i++); } TRIANGULAR #include <LPC21xx.h> int main () { unsigned long int temp=0x00000000;    unsigned int i=0;   IO0DIR=0x00FF0000;         while(1)     {     // output 0 to FE          for(i=0;i!=0xFF;i++)         {         temp=i;           temp = temp << 16;        ...
Read more

Dc_p-10

 #include<lpc214x.h> void clock_wise(void); void anti_clock_wise(void); unsigned int j=0; int main() { IO0DIR= 0X00000900; IO0SET= 0X00000100; //P0.8 should always high.   while(1)   {     clock_wise();     for(j=0;j<400000;j++); //delay     anti_clock_wise();     for(j=0;j<400000;j++); //delay } //End of while(1) } //End of Main void clock_wise(void) { IO0CLR = 0x00000900; //stop motor and also turn off relay     for(j=0;j<10000;j++); //small delay to allow motor to turn off    IO0SET = 0X00000900; //Selecting the P0.11 line for clockwise and turn on motor } void anti_clock_wise(void) { IO0CLR = 0X00000900; //stop motor and also turn off relay   for(j=0;j<10000;j++); //small delay to allow motor to turn off    IO0SET = 0X00000100; //not selecting the P0.11 line for Anti clockwise }
Read more

stepp_p-11

 #include <LPC21xx.H>  void clock_wise(void);  void anti_clock_wise(void);    unsigned long int var1,var2;  unsigned int i=0,j=0,k=0;  int main(void)  { PINSEL0 = 0x00FFFFFF; //P0.12 to P0.15 GPIo IO0DIR |= 0x0000F000; //P0.12 to P0.15 output while(1) { for(j=0;j<50;j++)       // 20 times in Clock wise Rotation clock_wise(); for(k=0;k<65000;k++);   // Delay to show  anti_clock Rotation  for(j=0;j<50;j++)       // 20 times in  Anti Clock wise Rotation anti_clock_wise(); for(k=0;k<65000;k++);   // Delay to show clock Rotation  } // End of while(1)  } // End of main  void clock_wise(void)  { var1 = 0x00000800;          //For Clockwise     for(i=0;i<=3;i++)          // for A B C D Stepping { var1 = var1<...
Read more