Strictly speaking the "new" identifier is not a reserved word. Still
it's good practice not to use it for variables in C language sources.
Rename variables to "old_bit" and "new_bit" for consistency.
Rearrange the order of declarations in the protocol.h header. Start with
packet layout, continue with requests (commands), then responses (status),
before the device context and the set of routines.
Rename the status codes to STS_* in contrast to CMD_* codes. Use an enum
for different byte values, leave defines for packet sizes et al. Phrase
bit fields in terms of bit numbers not byte values.
Total nit: Change the breaks in the long list of add_source() args. Keep
event type and timeout together, similar to callback and its data.
Explicitly "break the flow" when internal status gathering fails, to
reflect that an error path is taken and the config call will fail. The
conditional assignment of response data in case of success could be
slightly misleading (it was to me during review).
Eliminate a goto which kind of circumvented the optional transmission of
a request to the device. Instead test whether a command was filled in to
determine whether a command needs to get sent.
This driver supports ITECH IT8500 series electronic loads:
IT8511+, IT8511A+,
IT8512+, IT8512A+, IT8512B+, IT8512C+, IT8512H+,
IT8513A+, IT8513B+, IT8513C+, IT8514C+, IT8514B+, IT8516C+
Additionally BK Precision 8500 series loads (models 8500, 8502, 8510,
8512, 8514, 8518, 8520, 8522, 8524 & 8526) should work as well.
As ITECH is the OEM manufacturer for these BK Brecision models.
Gerhard Sittig
Timo Kokkonen