ST METERS AND MORE UM2241, User Manual

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Host interface commands UM2241
14/26 DocID030767 Rev 1
2 Host interface commands
2.1 Commands
The following table is a summary of the available commands, each command will be better
specified later on.
Table 5: Available commands
Command .request
.confirm
(positive)
.indication
.confirm
(negative)
Description
MIB_Write 0x08 0x09 0x0A 0x0B
Modifies the value of a
specific MIB object
(.request) or notifies
about an internally
triggered modification
(.indication).
MIB_Read
0x0C 0x0D - 0x0F
Reads the current value
of a specific MIB object.
DL_DATA_SLAVE - - 0x26 -
Notifies about data
packet received over the
power line.
HI_Ping
0x2C 0x2D - -
Host interface loop, used
to monitor the healthy
state of the serial link
and modem.
HI_Error
- - - 0x36
Notifies about the
reception of an unknown
command.
BIO_Reset 0x3C 0x3D 0x3E 0x3F
Triggers a SW reset
(.request) or notifies
about an internally
triggered reset event
(.indication).
2.2 Error codes
Table 6: List of error codes
Value Error Description
0x02 WPL Wrong argument or parameter length
0x03 WPV Wrong argument or parameter value
0x04 BUSY Subsystem which is supposed to perform the operation is busy
0x06 NOT_PRESENT
Subsystem which is supposed to perform the operation is either not
present or not connected
0x07 DISABLED Subsystem which is supposed to perform the operation is disabled
0x08 TIMEOUT The operation has not been performed in the proper time
0xFF ERROR Generic error