NEED HELP: PING sensor on CM-700 + AVR Studio 5.1

[adamsya]

Hi,

I have try many time using PING))) sensor on CM-700 but fail to operate.

I have connect to port PF1 (ADC1)

print the result on Roboplus terminal

I am using AVR Studio 5.1

there are 3 include file and 1 main file

and serial library for roboplus terminal (download from robotis support website)

http://support.robotis.com/en/baggage_f ... m700_v1.01).zip


Program below I refer one website, he display on LCD but I change to printf on terminal.

-----------------------------------------------------------
file name: delay_win.h (include file)

#include <avr>
void delay_025ms(uint8_t s);
void delay_us(uint8_t s);
-----------------------------------------------------------
file name: uson.h (include file)

#define DDR_Uson DDRF
#define PORT_Uson PORTF
#define PIN_Uson PINF
#define Front_Uson 1

uint8_t get_distance(char side);

-------------------------------------------------------------
file name: uson.c (include file)

#include <avr>
#include "uson.h"
#include "delay_win.h"


uint8_t get_distance(char side) // fungsi untuk mendapatkan jarak
{
uint8_t distance = 0;


DDR_Uson |=_BV(side);
PORT_Uson|=_BV(side);
delay_us(3);
PORT_Uson &=~_BV(side);
DDR_Uson &=~_BV(side);
loop_until_bit_is_set(PIN_Uson,side);


// ultasonik sudah mengirimkan sinyal


while(bit_is_set(PIN_Uson,side) && distance<254>= 254)
distance = 255;
else if (distance<8>9 && distance<=31)
distance=((distance-2)/2);
else
distance=((distance-1)/2);


return distance;
}

-------------------------------------------------------------------
file name: PING SENSOR (main file)


#include <avr>
#include <stdio>
#include <uson>
#include <uson>

#ifndef F_CPU
#define F_CPU 16000000UL // or whatever may be your frequency
#endif

#include <util>
#include <delay_win>
#include <avr>
#include "serial.h"


int main(void)
{

serial_initialize(57600);
sei();


while(1)
{

printf( "jarak = %d",get_distance(Front_Uson)); // Print Value on USART
_delay_ms(50);

}
}

---------------------------------------------------------------------------------


could someone help me, if you have working program, please share with me. sharing is caring~ thanks



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[Fritzoid]

adamsya,

After it's triggered, the Parallax PING))) sensor responds with a 5V pulse until the echo is detected or a timeout occurs. So you need to connect it to a digital port and time the response. Here is an example of how that's done in c. http://www.societyofrobots.com/member_tutorials/node/194. Notice that the code waits for the signal to go high before it clears the timer and waits for the pulse to go low again.