[chirp_devel] [chirp_users] TK-790 users, developer need help from you...
Tom Hayward
Wed Jun 8 19:35:21 PDT 2016
On Wed, Feb 24, 2016 at 2:51 PM, Pavel Milanes (CO7WT)
<co7wt at frcuba.co.cu> wrote:
> Hi Tom,
>
> I think I nailed, attached is the first beta driver for the Kenwood TK-790.
>
> Please try it if you have the time, any comments will be appreciated, also
> if you encounter any error the debug.log will be very useful (zip it please)
>
> Cheers, Pavel CO7WT
Hi Pavel,
I've been working through the TK-790 driver you sent me and made a
number of changes. Downloads are now working for me fast and
consistently.
I'm not sure if you encountered this problem, but often when I would
put the radio into PROGRAM mode, I would not immediately see an ack.
This would abort the download. It seems this radio likes to send
serial data for every possible event, so often when I would go to read
the ack there would be 100+ bytes in the input buffer (and this is
after clearing the buffer immediately before issuing the PROGRAM
command!). Consistently, however, I would see the ack at the end of
all this garbage. I noticed that the information frames (the
"garbage") all ended in 0xFF, so I added a way to chew through them:
_raw_send(radio, "PROGRAM")
ack = _raw_recv(radio, 1024)
while ack:
if ack[0] == ACK_CMD:
break
ack = ack[ack.index('\xff')+1:]
else:
radio.pipe.write("E")
raise errors.RadioError("Radio didn't acknowledge program mode.")
This will look for the ack after the garbage/information frames, but
never inside them! One issue down...
The other problem I encountered was very slow downloads. In many cases
the code was requesting more bytes than the radio was sending, so we
had to wait for the timeout to expire. I refactored _recvl() and
_recvh() such that they now only request as many bytes as needed. This
makes downloads very fast! This negates the need for short timeouts
and sleeps, so I removed those.
I haven't tested upload.
I noticed the tests crash on the bank code, but haven't looked into it.
Attached is my updated tk790.py. Disclaimer for those on the
sidelines: it's very much a work in progress!
Tom KD7LXL
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