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lb-gps-linux-status.cpp
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lb-gps-linux-status.cpp
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#include <iostream>
using namespace std;
/* Linux */
#include <linux/types.h>
#include <linux/input.h>
#include <linux/hidraw.h>
/* Unix */
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
/* C */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <stdint.h>
#include <getopt.h>
#include <time.h>
//Leo GPS Clock
#include "GPSSettings.h"
/*
* Ugly hack to work around failing compilation on systems that don't
* yet populate new version of hidraw.h to userspace.
*/
#ifndef HIDIOCSFEATURE
#warning Please have your distro update the userspace kernel headers
#define HIDIOCSFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
#define HIDIOCGFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
#endif
#define HIDIOCGRAWNAME(len) _IOC(_IOC_READ, 'H', 0x04, len)
const char *bus_str(int bus);
int main(int argc, char **argv)
{
cout << "Leo Bodnar GPS Clock Status" << endl;
int fd;
int i, res, desc_size = 0;
u_int8_t buf[60];
struct hidraw_devinfo info;
/* Open the Device with non-blocking reads. In real life,
don't use a hard coded path; use libudev instead.
*/
printf("Opening device %s\n", argv[1]);
fd = open(argv[1], O_RDWR|O_NONBLOCK);
if (fd < 0)
{
perror("Unable to open device");
return 1;
}
//Device connected, setup report structs
memset(&info, 0x0, sizeof(info));
// Get Raw Info
res = ioctl(fd, HIDIOCGRAWINFO, &info);
if (res < 0)
{
perror("HIDIOCGRAWINFO");
}
else
{
printf("Device Info:\n");
printf("\tvendor: 0x%04hx\n", info.vendor);
printf("\tproduct: 0x%04hx\n", info.product);
if (info.vendor != VID_LB_USB || (info.product != PID_GPS_CLOCK && info.product != PID_MINI_GPS_CLOCK)) {
perror("Not a valid GPS Clock Device");
return -1;//Device not valid
}
}
/* Get Raw Name */
res = ioctl(fd, HIDIOCGRAWNAME(256), buf);
if (res < 0)
perror("HIDIOCGRAWNAME");
else
printf("Device Name: %s\n", buf);
/* Get Status */
int timeout = 0;
while (timeout < 1000){
int report_len = read(fd, buf, sizeof (buf));
printf(".");
if (report_len < 1) {
printf(".");
//Create some delay before trying again.
for (i = 0; i< 10000000; i++) {
report_len = i*i;
}
timeout++;
} else {
printf("\n");
printf("Loss of Signal Count: %i\n", buf[0]);
if (buf[1] & 0x01) {
printf("Sat Status: Unlocked\n");
} else {
printf("Sat Status: Locked\n");
}
if (buf[1] & 0x02) {
printf("PLL Status: Unlocked\n");
} else {
printf("PLL Status: Locked\n");
}
return buf[1] & 0x03;//Return locked status
}
}
close(fd);
return 0;
}
const char * bus_str(int bus)
{
switch (bus)
{
case BUS_USB: return "USB"; break;
case BUS_HIL: return "HIL"; break;
case BUS_BLUETOOTH: return "Bluetooth"; break;
case BUS_VIRTUAL: return "Virtual"; break;
default: return "Other"; break;
}
}