questions about serial_io

questions about serial_io

[Justin Skists]

Hi,

I was wondering if there was a reason why speakup_acntpc, speakup_decpc,
speakup_dtlk and speakup_keypc synthesisers use spl_serial_io_ops rather
than spk_ttyio_ops?

Is it because these particular devices don't have tty drivers, or
something similar?

Thanks,
Justin

Re: questions about serial_io

[Samuel Thibault]

Justin Skists, le sam. 02 juin 2018 17:29:43 +0100, a ecrit:
> I was wondering if there was a reason why speakup_acntpc, speakup_decpc,
> speakup_dtlk and speakup_keypc synthesisers use spl_serial_io_ops rather
> than spk_ttyio_ops?
> 
> Is it because these particular devices don't have tty drivers, or
> something similar?

That's because these devices use non-standard serial port access, and
thus the standard Linux serial drivers can't be used.

Samuel

Re: questions about serial_io

[Justin Skists]

On Sat, Jun 02, 2018 at 06:44:42PM +0200, Samuel Thibault wrote:
> Justin Skists, le sam. 02 juin 2018 17:29:43 +0100, a ecrit:
> > I was wondering if there was a reason why speakup_acntpc, speakup_decpc,
> > speakup_dtlk and speakup_keypc synthesisers use spl_serial_io_ops rather
> > than spk_ttyio_ops?
> > 
> > Is it because these particular devices don't have tty drivers, or
> > something similar?
> 
> That's because these devices use non-standard serial port access, and
> thus the standard Linux serial drivers can't be used.

Understood. Thank you! :)

Justin.

Re: questions about serial_io

[Chime Hart]

Well Sam, certainly in these 13years I've had a DecTalk U S B, I've mentioned 
the sudden drops in pitch, rate, and volume. Among many boots-and-restarts, I 
now notice when DecTalk comes up, it says:
"euro euro euro"
After that the volume, pitch, and rate drop. Pitch lands around 121, rate around 
180, but I prefer 229, and volume caims its at the top 86, although I jog each 
controll so it restores. I wish there were ways of producing a log of what 
Speakup is sending the DecTalk upon bootup. Thanks in advance
Chime