Read a data set from the specified inactive logger buffer.
Input:
Logger : SYSHANDLE
A user provided handle to uniquely identify the logger. See SYSHANDLE page. This field is mandatory.
Data : PTR
A pointer to a structure to read the sensor data into. The structure type must be according to the data being read. See msLoggerNext for how to get the structure type.
Returns: INT
1
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- Success.
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0
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- This function is not supported.
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-1
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- Interface is not open. Call msOpen first.
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-2
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- Generic error.
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-4
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- Illegal input data type.
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-5
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- The logger is not present.
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-9
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- The specified logger is running. Call msLoggerStop first.
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-16
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- Logger buffer error.
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Declaration
FUNCTION msLoggerRead : INT;
VAR_INPUT
Logger : MANDATORY SYSHANDLE;
Data : PTR;
END_VAR;
Example:
VAR
acc : msAccData;
gyr : msGyrData;
timestamp : msTimestamp;
END_VAR;
FUNCTION readLogger;
VAR_INPUT
_logger : SYSHANDLE;
END_VAR;
VAR
next : INT;
rc : INT;
END_VAR;
REPEAT
next := msLoggerNext(logger:=_logger);
CASE next OF
_MS_LOGGER_NODATA:
DebugMsg(message:="No more data in buffer!");
_MS_LOGGER_TIMESTAMP:
rc := msLoggerRead(logger:=_logger, data:=ADDR(timestamp));
DebugFmt(message:="Timestamp: \4", v4:=timestamp.time);
DebugMsg(message:="--------------------------------");
_MS_LOGGER_ACCDATA:
rc := msLoggerRead(logger:=_logger, data:=ADDR(acc));
DebugMsg(message:=" ACC >>> X: "+floatToStr(v:=(acc.x*1000.0))+" mg Y: "+
floatToStr(v:=(acc.y*1000.0))+" mg Z: "+
floatToStr(v:=(acc.z*1000.0))+" mg");
_MS_LOGGER_GYRDATA:
rc := msLoggerRead(logger:=_logger, data:=ADDR(gyr));
DebugMsg(message:=" GYR >>> X: "+floatToStr(v:=(gyr.x))+" dps Y: "+
floatToStr(v:=(gyr.y))+" dps Z: "+
floatToStr(v:=(gyr.z))+" dps");
ELSE
DebugFmt(message:="Invalid record ID \1", v1:=next);
END_CASE;
IF rc <> 1 THEN
DebugFmt(message:="msLoggerRead (rc=\1)", v1:=rc);
END_IF;
UNTIL (next = _MS_LOGGER_NODATA);
END_REPEAT;
END_FUNCTION;
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