code conversion from avr-->arm

hello ,this is the code i made for interfacing an ultrasonic sensor to atmega8 board, it worked fine...

//*atmega8*// #include<avr/io.h> #include<util/delay.h> #include "lcd118010.h"

#define US_PORT PORTC #define US_PIN PINC #define US_DDR DDRC

#define US_TRIG PC5 //PORTA0= trigger #define US_ECHO PC0 // port a1 = echo

/********************************************************************

This function measusers the width of high pulse in micro second.

********************************************************************/

#define US_ERROR 0xffff #define US_NO_OBSTACLE 0xfffe // while using macro place the replacing thing "before" the replaced thing with a white space int d; //global variable=distance; uint16_t getPulseWidth() { uint32_t i,result;

//Wait for the rising edge for(i=0;i<600000;i++) { if(!(US_PIN & (1<<US_ECHO))) continue; else break; }

if(i==600000) return 0xffff; //Indicates time out

//High Edge Found

//Setup Timer1 TCCR1A=0X00; TCCR1B=(1<<CS11); //Prescaler = Fcpu/8 TCNT1=0x00; //Init counter

//Now wait for the falling edge for(i=0;i<600000;i++) { if(US_PIN & (1<<US_ECHO)) { if(TCNT1 > 60000) break; else continue; } else break; }

if(i==600000) return 0xffff; //Indicates time out

//Falling edge found

result=TCNT1;

//Stop Timer TCCR1B=0x00;

if(result > 60000) return 0xfffe; //No obstacle else return (result>>1); }

void move_robo() { if(d<20) { PORTD=0x10; _delay_ms(100); } else if(d>20) { PORTD=0xa0; _delay_ms(100); } else { PORTD=0x90; /// spin }

}

void Wait() { uint8_t i; for(i=0;i<10;i++) _delay_loop_2(0); } int main() { DDRD=0xf0; PORTD=0x00; uint16_t r;

Wait();

//Initialize the LCD Module lcd_init();

Wait();

lcd_clear(); lcd_gotoxy(0,0); lcd_string("HC SR04 TEST");

Wait(); Wait(); Wait(); Wait(); Wait(); Wait();

lcd_clear();

while(1) {

//Set Ultra Sonic Port as out US_DDR|=(1<<US_TRIG);

_delay_us(10);

//Give the US pin a 15us High Pulse US_PORT|=(1<<US_TRIG); //High

_delay_us(15);

US_PORT&=(~(1<<US_TRIG));//Low

_delay_us(20); //Now make the pin input US_DDR&=(~(1<<US_ECHO)); //Measure the width of pulse r=getPulseWidth();

//Handle Errors if(r==US_ERROR) { lcd_clear(); lcd_gotoxy(0,0); _delay_us(100); lcd_string("error"); } else if(r==US_NO_OBSTACLE) { lcd_gotoxy(0,0);
\ _delay_us(100); lcd_string("clear"); } else {

d=(r/58.0); //Convert to cm lcd_gotoxy(1,0); lcd_string("d="); _delay_us(100); lcd_gotoxy(1,4); lcd_showvalue(d); _delay_ms(50); lcd_gotoxy(1,7); lcd_string("cm"); _delay_ms(100); if(d>20) { PORTD=0xa0; _delay_ms(200); } else { move_robo(); }

Wait(); } } }

BUT,WHEN I CONVERTED THIS CODE INTO ARM

/*********************************************************************************

microcontroller: LPC1768-Cortex M3
clock: 12mhz
compiler Keil uVision 4
********************************************************************************
***********************************************************************/
#include "LPC17xx.h"
#include "delay.h"
#include "type.h"
#include "lcd.h"
#define US_PORTCLR LPC_GPIO0->FIOCLR
#define US_PORTSET LPC_GPIO0->FIOSET
#define US_DDR LPC_GPIO0->FIODIR
#define US_PIN LPC_GPIO0->FIOPIN
#define US_ECHO 5 // pot 0 5th pin for echo
#define US_TRIG 6 // p0.6 for trigger #define US_ERROR 0xffff #define US_NO_OBSTACLE 0xfffe
uint32_t d;

uint16_t getPulseWidth() { uint32_t i,result;

//Wait for the rising edge for(i=0;i<600000;i++) { if(!(US_PIN & (1<<US_ECHO))) continue; else break; }

if(i==600000) return 0xffff; //Indicates time out

//High Edge Found

//Setup Timer1 LPC_SC->PCONP |= 1 << 1; //Power up Timer 0 LPC_SC->PCLKSEL0 |= 1 << 2; // Clock for timer = CCLK

LPC_TIM0->TCR |= 1 << 1; LPC_TIM0->TCR |= 1 << 0; // Start timer

//Now wait for the falling edge for(i=0;i<600000;i++) { if(US_PIN & (1<<US_ECHO)) { if((LPC_TIM0->TC) > 60000) break; else continue; } else break; }

if(i==600000) return 0xffff; //Indicates time out

//Falling edge found

result=(LPC_TIM0->TC); //STORE COUNT IN RESULT

//Stop Timer LPC_TIM0->TCR |= 0 << 0;

if(result > 60000) return 0xfffe; //No obstacle else return (result>>1); }

int main (void)
{ uint16_t r; SystemInit(); lcd_init(); delay_ms(50);

lcd_clear(); lcd_gotoxy(0,0); lcd_string("HC SR04 TEST");
delay_ms(50);

while(1) { //Set Ultra Sonic Port as out US_DDR|=(1<<US_TRIG);

delay_us(10);

//Give the US pin a 15us High Pulse US_PORTSET|=(1<<US_TRIG); //High

delay_us(15);

US_PORTCLR|=(1<<US_TRIG);//Low

delay_us(20); //Now make the pin input US_DDR&=(~(1<<US_ECHO)); //Measure the width of pulse r=getPulseWidth();

//Handle Errors if(r==US_ERROR) { lcd_clear(); lcd_gotoxy(0,0); delay_us(100); lcd_string("error"); } else if(r==US_NO_OBSTACLE) { lcd_gotoxy(0,0);
\ delay_us(100); lcd_string("clear"); } else {

d=(r/58.0); //Convert to cm lcd_gotoxy(1,0); lcd_string("d="); delay_us(100); lcd_gotoxy(1,4); lcd_showvalue(d); delay_ms(50); lcd_gotoxy(1,7); lcd_string("cm"); delay_ms(100);
} }
}

IT IS NOT DOING, LCD IS DISPLAYING USELESS VALUES..
PLEASE HELP ME CORRECTING THE CODE FOR ARM..
ULTRASONIC MODULE I USED IS HC SR04

i thing i may have missed some timer concepts; as i'm a beginner
THANKYOU