tree 1d5644fa7ab67a6552205c27a3cd213b8ddfe25a
parent a4939dc8461c0a2d8e67aa3bb95bfb73ad9225b7
author Pau Espin Pedrol <pespin@sysmocom.de> 1604516438 +0100
committer laforge <laforge@osmocom.org> 1605125306 +0000

tdef: Introduce OSMO_TDEF_US unit

Some applications may need submillisecond timers, such as those
interacting with modbus serial lines (RS-485, RTU), which require
timers of values around 1.5 char-time (T1.5), where a data char is
composed of 11 bits sent on the line: 1 start bit, 8 data bits,
1 stop bit, and and parity bit (or 2nd stop bits if no parity).

For instance, for a baudrate of 9600:
1.5 * 11 / 9600 = 1.718 ms = 1718 us

So having a granularity of MS is not enough here.

Change-Id: I71848d7c1ee0649929ce07680ee7320bb2a42f0e