[time-nuts] GPS message jitter (was GPS for Nixie Clock)
hmurray at megapathdsl.net
Mon Jul 18 21:59:57 EDT 2016
jimlux at earthlink.net said:
> except that virtually every UART in use today has some sort of buffering
> (whether a FIFO or double buffering) between the CPU interface and the bits
> on the wire, which completely desynchronizes the bits on the wire from the
> CPU interface.
The idea was to reduce the CPU load processing interrupts by batching things
Some of those chips generate an interrupt when the see a return or line-feed
Most of them have an option to disable that batching. On Linux the setserial
command has a low_latency option. I haven't measured the difference. It
would be a fun experiment.
These are my opinions. I hate spam.
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