Most messages from the DMM parsers are not hard errors, lower to
sr_dbg() so that the sigrok-cli output doesn't get cluttered (by default)
with debug output such as:
P1: 0.001100 V DC AUTO
sr: fs9721: Sync nibble in byte 0 (0x00) is invalid.
P1: 0.001100 V DC AUTO
(using -l 4 or -l 5 will still allow the user to see such messages)
This DMM is not using the standard bits in the FS9922 protocol/structure
to indicate the "volt" and "diode mode" flags. Instead, it only sets the
user-defined bit "z1" to indicate both "diode mode" and "volt".
This fixes#142.
Use the same functions and structs as the other DMM protocol parsers
in hardware/common/dmm. Among other things, this allows the functions
to be used from drivers in a generic way, e.g. in serial-dmm, uni-t-dmm,
and possibly other drivers.
Uwe Hermann
Martin Ling