You use integrated development environment like Eclipse or codeblocks?
In such case usually with some luck it if possible to rightclick or shortcut
key on variable/type and show declaration. It also possible variables, type
maybe with hierachy is a available in extra tab.
I tried to program Linuxcnc in Eclipse and it works relatively well but it is
written in Java so sometimes the coffe ring appear and keystrokes may be a
little bit delayed but it's a small problem.
I recently also download and tried codeblocks which make relatively good
impression. gnat-gps is another option.
In the code I could see a typecast which I usually only use if there is a good
reason for it. Most usually is I come by a number and have figured out it shoul
repsent som kind of type, most usually serially received data in some kind of
message protocol.
On Sat, 8 Dec 2018 16:51:11 +0000
Chris Morley <chrisinnana...@hotmail.com> wrote:
>
> ________________________________
> From: Nicklas SB Karlsson <nicklas.karlsso...@gmail.com>
> Sent: December 8, 2018 4:23 PM
> To: EMC developers
> Subject: Re: [Emc-developers] how to catch errors with waitcomplete command
> in python
>
> >No real idea but an exception is a common method to handle errors, it might
> >however be a problem in a real time system.
>
> In this case the python is a bit of a red herring...
> I'm using python to call the wait_complete() function but it actually is
> programmed in C++
> Here is the function:
>
> static int emcWaitCommandComplete(pyCommandChannel *s, double timeout) {
> double start = etime();
>
> do {
> double now = etime();
> if(s->s->peek() == EMC_STAT_TYPE) {
> EMC_STAT *stat = (EMC_STAT*)s->s->get_address();
> int serial_diff = stat->echo_serial_number - s->serial;
> if (serial_diff > 0) {
> return RCS_DONE;
> }
> if (serial_diff == 0 &&
> ( stat->status == RCS_DONE || stat->status == RCS_ERROR )) {
> return stat->status;
> }
> }
> esleep(fmin(timeout - (now - start), EMC_COMMAND_DELAY));
> } while (etime() - start < timeout);
> return -1;
> }
>
> It seems to decide if the command is done by it's serial number.
> But it does check it's status.
> It seems the RCS is probably a message frame that NML uses.
> so maybe we could inject the commands error code into the
> stat-> structure.
> I just haven't been able to follow the code enough.
>
> Thanks
> Chris M
>
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