Re: [Hamlib-developer] ft747.c

[Stephane F. <f8...@fr...>]

Hi Alejandro,

Sorry to get back so late on this one. The fact is I have little if no
idea of the problem.

On Mon, Aug 19, 2002, pol...@so... wrote:
>  
> > compilation is ok. Now, lets see what's wrong with the serial
> > communication..
> 
> OK no doubt. the problem is on the serial comunication, how can I send the 5 bytes of UPDATE on low level?
> I think the problem is the speed of the serial port. 
> Because I make a circuit once, that circuit comunicates with the PC at 9600 baudios on Windows, but in Linux the same circuit only work when the serial speed is in 14400 baudios, I dont know why!
> The circuit is a CAT system for a BC tranceiver working on 28 MHz. 

Does your actual cable work at the *same speed* under Windows?
Some user made cables can have wrongly designed filters, which can stomp
low speed or high speed asynchronous modulation.

> Back on the YAESU problem, the tranceiver is receiving information from the PC (CAT label indicator ON) but I dont know if the tranceiver dont understood this info or the computer dont receive or understood the info from the YAESU. Is only a setting problem

Maybe the pacing value is at fault here. This is the minimum time between 2
bytes. Yaesu rigs cannot handle full speed communication because of
microcontroller limitation. Therefore, some delays have to be inserted
between chars.
So try to set FT747_PACING_DEFAULT_VALUE in yaesu/ft747.h to 5, and
check how the rig like it.

You should also check that the number of stop bits is 2. Lowering the
serial speed can be also a solution, provided the rig supports it.


73
Stephane