IC-746Pro ptt error

[mdblack98]

COM7 for CAT and COM10 for RTS ptt.
Hamlib is still querying rig ptt and somehow the 1st byte 0xfe is coming in before the command is sent???
I think we'll change rig_get_ptt to check the serial port RTS/DTR first instead of the CAT command.

[2023-03-03 17:40:14.448086][00:24:02.012097][RIGCTRL:trace] rig_get_mode mode=USB bw=3000
[2023-03-03 17:40:14.448086][00:24:02.012114][RIGCTRL:trace] mode: USB
[2023-03-03 17:40:14.448086][00:24:02.012135][RIGCTRL:debug] 1443:rig.c(3287):rig_get_ptt entered
[2023-03-03 17:40:14.448086][00:24:02.012156][RIGCTRL:trace] rig_get_ptt: cache check age=958ms
[2023-03-03 17:40:14.448086][00:24:02.012176][RIGCTRL:trace] rig_get_ptt: cache miss age=958ms
[2023-03-03 17:40:14.448086][00:24:02.012196][RIGCTRL:trace] rig.c(3400) trace
[2023-03-03 17:40:14.448833][00:24:02.012220][RIGCTRL:debug] 1444:icom.c(5061):icom_get_ptt entered
[2023-03-03 17:40:14.448833][00:24:02.012243][RIGCTRL:debug] 1445:frame.c(425):icom_transaction entered
[2023-03-03 17:40:14.448833][00:24:02.012267][RIGCTRL:debug] icom_transaction: cmd=0x1c, subcmd=0x00, payload_len=0
[2023-03-03 17:40:14.448833][00:24:02.012290][RIGCTRL:debug] 1446:frame.c(138):icom_one_transaction entered
[2023-03-03 17:40:14.448833][00:24:02.012311][RIGCTRL:trace] rig_flush: called for serial device
[2023-03-03 17:40:14.448833][00:24:02.012334][RIGCTRL:trace] read_string_generic called, rxmax=4095 direct=1, expected_len=1
[2023-03-03 17:40:14.459331][00:24:02.022887][RIGCTRL:trace] 0000 fe .
[2023-03-03 17:40:14.459331][00:24:02.023241][RIGCTRL:trace] write_block(): TX 7 bytes, method=2
[2023-03-03 17:40:14.459331][00:24:02.023270][RIGCTRL:trace] 0000 fe fe 66 e0 1c 00 fd ..f....
[2023-03-03 17:40:14.459331][00:24:02.023303][RIGCTRL:trace] read_string_generic called, rxmax=200 direct=1, expected_len=1
[2023-03-03 17:40:14.470577][00:24:02.034334][RIGCTRL:trace] read_string_generic(): RX 6 characters, direct=1
[2023-03-03 17:40:14.470577][00:24:02.034402][RIGCTRL:trace] 0000 fe 66 e0 1c 00 fd .f....
[2023-03-03 17:40:14.470577][00:24:02.034437][RIGCTRL:trace] icom_one_transaction: DEBUG retval=6, frm_len=7, cmd=0x1c
[2023-03-03 17:40:14.470577][00:24:02.034470][RIGCTRL:debug] 1446:frame.c(242):icom_one_transaction returning(-8) Protocol error
[2023-03-03 17:40:14.470577][00:24:02.034578][RIGCTRL:warning] icom_transaction: retry=3: rig_get_ptt: cache check age=958ms