SeeedStudio Grove Series - Page 44

http://www.seeedstudio.com/wiki/Grove_-_Ultrasonic_Ranger
*/
#include "TM1637.h"
#include "Ultrasonic.h"
/* Macro Define */
#define CLK 40 /* 4-digital display clock pin */
#define DIO 39 /* 4-digital display data pin */
#define BLINK_LED RED_LED /* blink led */
#define ULTRASONIC_PIN 38 /* pin of the Ultrasonic Ranger */
/* Global Varibles */
TM1637 tm1637(CLK, DIO); /* 4-digital display object */
Ultrasonic ultrasonic(ULTRASONIC_PIN); /* Ultrasonic Ranger object */
int distance = 0; /* varible to store the distance to obstacles in front */
int blink_interval = 0; /* led delay time */
int8_t bits[4] = {0}; /* array to store the single bits of the value */
/* the setup() method runs once, when the sketch starts */
void setup() {
/* Initialize 4-digital display */
tm1637.init();
tm1637.set(BRIGHT_TYPICAL);
/* declare the red_led pin as an OUTPUT */
pinMode(RED_LED, OUTPUT);
}
/* the loop() method runs over and over again */
void loop() {
distance = ultrasonic.MeasureInCentimeters(); /* read the value from the sensor */
memset(bits, 0, 4); /* reset array when we use it */
for(int i = 3; i >= 0; i--) {
/* get single bits of the analog value */
bits[i] = distance % 10;
distance = distance / 10;
tm1637.display(i, bits[i]); /* display by 4-digital display */
}
delay(100);
}
RESULT
批注 [20]: update pin number in code to 40 and 39
update ultrasonic pin to 38