Messages in this thread | | | Subject | Re: Serial custom speed deprecated? | From | Michael Poole <> | Date | Mon, 28 Aug 2006 11:51:40 -0400 |
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linux-os \(Dick Johnson\) writes:
> On Mon, 28 Aug 2006, Alan Cox wrote: > >> Ar Llu, 2006-08-28 am 08:17 -0400, ysgrifennodd linux-os (Dick Johnson): >>> On Sat, 26 Aug 2006 linux@horizon.com wrote: >>> >>>>> Or we could just add a standardised extra set of speed ioctls, but then >>>>> we need to decide what occurs if I set the speed and then issue a >>>>> termios call - does it override or not. >>>> >>>> Actually, we're not QUITE out of bits. CBAUDEX | B0 is not taken. >>> >>> B0 is not a bit (there are no bits in 0). It won't work. >> >> Well that is how it is implemented and everyone else seems happy. If it >> violates your personal laws of physics you'll just have to cope. > > It has nothing to do with 'personal laws of physics'. On all recent > implementations, B0 is 0, i.e., the absence of any bits set. Therefore, > there is no observable difference between CBAUDEX and CBAUDEX | B0, > as shown above. Therefore, as I stated, it won't work.
What baud rate does your system define CBAUDEX | B0 to be? On my AMD64 machine, both the x86-64 and i386 asm/termbits.h files skip CBAUDEX -- B38400 is 0000017 and B57600 is 0010001 (CBAUDEX | B50). The headers do not define any baud rate between those two, either by rate or by c_cflag value.
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