[gpsd-users] Proposed 9600 baud option for gpspipe

[IT1 Stuart Blake Tener, USNR]

List members,

After a quick non invasive look at gpspipe code, I could not see why  
it spits the first batch of JSON code in "-r" mode (I only figure it  
must be buried in the libgps code somewhere I guess), however, I was  
able to generate some code that would offer up the 9600 baud option.

Here are a set of proposed patches to gpspipe that would add the 9600  
baud command line switch "-9". These were generated using the 3.9 code  
base.

It's not that often that I have reason to sit and write code these  
days (scripts at most, as a UNIX Admin), but boy, several cups of  
strong coffee (yeah, yeah, I know I use a Keurig machine, so what, its  
convenient, ok?) and some source code to modify...it's a good day! :)

I also added the comments, not because I am interested in credit for  
my work, so much as not wanting to have lowly my code appear as if it  
is the work of far better programmers than I.

--- gpspipe.c.org       2013-06-21 13:31:50.073470368 -0400
+++ gpspipe.c   2013-06-27 08:05:39.529346405 -0400
@@ -18,6 +18,9 @@
  *
  * Original code by: Gary E. Miller <address@hidden>.  Cleanup by ESR.
  *
+ * Modifications to add 9600 baud command line option added 27 JUN 2013
+ * By IT1 Stuart Blake Tener, N3GWG <address@hidden>
+ *
  * This file is Copyright (c) 2010 by the GPSD project
  * BSD terms apply: see the file COPYING in the distribution root  
for details.
  *
@@ -48,6 +51,8 @@

 /* NMEA-0183 standard baud rate */
 #define BAUDRATE B4800
+#define BAUDRATE2 B9600
+bool baud9600 = false;

 /* Serial port variables */
 static struct termios oldtio, newtio;
@@ -79,7 +84,14 @@
     /* make it raw */
     (void)cfmakeraw(&newtio);
     /* set speed */
-    /address@hidden@*/ (void)cfsetospeed(&newtio, BAUDRATE);
+    if (baud9600)
+    {
+       /address@hidden@*/ (void)cfsetospeed(&newtio, BAUDRATE2);
+    }
+    else
+    {
+       /address@hidden@*/ (void)cfsetospeed(&newtio, BAUDRATE);
+    }

     /* Clear the modem line and activate the settings for the port. */
     (void)tcflush(fd_out, TCIFLUSH);
@@ -105,6 +117,7 @@
                  "-T [format] set the timestamp format (strftime(3)-like; implies 
'-t')\n"
                  "-u usec time stamp, implies -t. Use -uu to output sec.usec\n"
 		  "-s [serial dev] emulate a 4800bps NMEA GPS on serial port (use  
with '-r').\n"
+		  "-9 instruct gpspipe to use 9600bps instead of 4800bps if -s is  
being used.\n"
                  "-n [count] exit after count packets.\n"
                  "-v Print a little spinner.\n"
                  "-p Include profiling info in the JSON.\n"
@@ -141,7 +154,7 @@

     /address@hidden@*/
     flags = WATCH_ENABLE;
-    while ((option = getopt(argc, argv, "?dD:lhrRwStT:vVn:s:o:pu")) != -1) {
+    while ((option = getopt(argc, argv, "?dD:9lhrRwStT:vVn:s:o:pu")) != -1) {
        switch (option) {
        case 'D':
            debug = atoi(optarg);
@@ -201,6 +214,9 @@
        case 's':
            serialport = optarg;
            break;
+       case '9':
+           baud9600 = true;
+           break;
        case 'o':
            outfile = optarg;
            break;


V/R and 73,

Stuart, N3GWG


--

IT1 Stuart Blake Tener, USNR, N3GWG (Extra), MROP
NR N-NC JTF EAST DET UIC 84245

Las Vegas, NV / Boulder, CO / Philadelphia, PA / Beverly Hills, CA

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e-mail: address@hidden