CM108: unable to trigger default pin setting because I can't see a way to set rig port to CM108

[paulmr]

In order to correctly trigger the PTT on a modified CM108 chip that has been attached to GPIO3, we need to use ptt_bitnum = 2, which makes sense as a default and it looks like this is the intention of the code:

#  define DEFAULT_CM108_PTT_BITNUM 2

   switch (caps->port_type)
    {
    // [...]
    case RIG_PORT_CM108:
        strncpy(rs->rigport.pathname, DEFAULT_CM108_PORT, HAMLIB_FILPATHLEN);
        rs->rigport.parm.cm108.ptt_bitnum = DEFAULT_CM108_PTT_BITNUM;
        rs->pttport.parm.cm108.ptt_bitnum = DEFAULT_CM108_PTT_BITNUM;
        break;

However, this is only triggered if the port_type is set to RIG_PORT_CM108, but I can't see any way to do this:

$ rg RIG_PORT_CM108
include/hamlib/rig.h:    RIG_PORT_CM108,         /*!< CM108 GPIO */
src/iofunc.c:    case RIG_PORT_CM108:
src/rig.c:    case RIG_PORT_CM108:

The enum value seems to be defined but not used anywhere.

It is simple to workaround the issue by explicitly setting the bitnum on the command line:

$ rigctl -L -C ptt_bitnum=2 -P CM108

but the code does seem to suggest that this setting should be the default.

Should a model of the dummy rig be added that sets the port to RIG_PORT_CM108, or is there a place for another rig to be added that has this setting?

[paulmr]

Hello @mdblack98 , I apologise for the delay, but I have now been able to test this with the latest master and it works perfectly. Thank you very much.