use /dev/serial links so the plug order does not matter

git-svn-id: https://bucket.mit.edu/svn/nilm/zoom@7621 ddd99763-3ecb-0310-9145-efcb8ce7c51f

pc/calibrate.c

@@ -24,8 +24,8 @@ void handle_sig(int sig) { g_quit = 1; }
 
 int main(int argc, char *argv[])
 {
-	char *zoomdev=strdup("/dev/ttyUSB1");
-	char *gpibdev=strdup("/dev/ttyUSB0");
+	char *zoomdev=strdup("/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A6007wag-if00-port0");
+	char *gpibdev=strdup("/dev/serial/by-id/usb-Prologix_Prologix_GPIB-USB_Controller_PXQQY20G-if00-port0");
 	int getopt_index;
 	int zoom, gpib;
 	int do_zero = 0;
@@ -66,8 +66,8 @@ int main(int argc, char *argv[])
 	if (help) {
 		fprintf(stderr, "Zoom Nilm Calibration Tool\n");
 		fprintf(stderr, "usage: %s [options]\n\n", *argv);
-		fprintf(stderr, "  -z,  --zoom-device %-14s zoom NILM serial port\n", zoomdev);
-		fprintf(stderr, "  -g,  --gpib-device %-14s GPIB serial port\n", gpibdev);
+		fprintf(stderr, "  -z,  --zoom-device %-14s zoom NILM serial port\n", "/dev/xxx" /*zoomdev*/);
+		fprintf(stderr, "  -g,  --gpib-device %-14s GPIB serial port\n", "/dev/xxx" /*gpibdev*/);
 		fprintf(stderr, "  -s,  --startup-zero               assist startup by writing '0' to zoom NILM\n");
 		fprintf(stderr, "  -h,  --help                       this help\n");
 		return 1;