🚀 go-pugleaf

Bob Gonder wrote:
> Is this what you need to happen?
> 25 ms low,
> 25ms high,
> then commands at 10400 baud?

Yes, exact that timing and it must to be so:
Baud: 360 -> 25 ml low, 25 ml hight (total of 50 ml)
Baud: 10472 -> init byte (maximal at milli 51).

> Huh?
> There is no 360 setting. Docs say 300 or 600.

360 is not an standard setting but you can use whichever baudrate, when the 
baud is between the aalowed range.

> The duration of a character at 360 baud would be 1/36 second. The
> duration of the 8 zero bits would be 1/45 second.
> But, you are looking for a zero duration of 1/40 second (25 ms)
> OTOH, if you set Parity to Even instead of None, then you would get a
> Zero-Time of 1/40 second.
> But, that makes it hard to get 25 ms of high.

So far as I know (just what i tried this week ;-) ) the speed to sent a byte 
is the number of bytes over the speed of the port, so 1 byte / 360 baud 
which is 0,025 seg (25ml).  The osciloscope tell me that the calculation is 
ok.  with 360 b i sent a 0x0 and i get 25 ml of pulse.

> Don't open the port with FILE_FLAG_OVERLAPPED.
> Use WriteFile() with lpOverlapped = NULL.

The behavior is bettter... now i can see that a time to write a byte is 2.8 
ml.  Now i have to play a little with multitreathing or multimedia timer. 
Thanks it was very helpfully.

> Try this sequence:
>
> CreateFile();
> SetBaud(10400);
> SetThreadPriority(Higher)
> starttime=GetTime();
> SetCommBreak();
> while( (GetTime()-starttime) < 25ms );
> ClearCommBreak();
> SetThreadPriority(Normal)
> /*Now for 25ms high.*/
> WriteFile( 26 times 0xff ) /* (10400/10)/40 == 26 */
> WriteFile(Commands)

So comes many fast picks ... not only one.

I try to make now someting like :

- configure port Synchronic at 360 bauds
- Save Start Time.
- Write 0x0
- Save Stop time
- calculate the difference between times
- wait 25 ml - the calculate Time differences
- Send byte for Start communication

It shall work..

Thanks again
Keneth