raspberrypi/gpio/sound.c

50 lines
822 B
C

/*
* 声音传感器
*
*/
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
static int is_num(char *str)
{
int i, len;
for (i = 0, len = strlen(str); i < len; i++) {
if (isdigit(str[i]) == 0) {
printf("不是数字\n");
return 1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
if (argc != 2) {
printf("Parameter error.\n");
exit(1);
}
if (is_num(argv[1]) == 1) {
printf("Parameter error, parameter 1 is PIN pin value\n");
exit(1);
}
int pin = atol(argv[1]);
int status = 0;
wiringPiSetup();
pinMode(pin, INPUT);
//pullUpDnControl(pin, PUD_DOWN);
status = digitalRead(pin);
printf("%d\n", status);
return status;
}