mcCharacteristicRead

ECU Measurement and Calibration Toolkit Help

Edition Date: October 2018

Part Number: 371602T-01

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Purpose

Reads all data as scaled from a named Characteristic on the ECU which is identified by the ECU Reference handle.

Format

mcTypeStatus mcCharacteristicRead(
mcTypeTaskRef ECURefNum,
char*CharacteristicName,
f64*Values,
u32NumberOfValues);

Input

ECURefNum

ECURefNum is the task reference which links to the selected ECU. This reference is originally returned from mcECUSelectEx.

CharacteristicName

CharacteristicName is the name of the Characteristic defined in the A2L database file.

NumberOfValues

Specifies the number of values to read. To determine the dimension of the Characteristic, use the mcGetProperty function with the parameter mcPropChar_Dimension. To determine the size of each dimension use the mcGetProperty function with the parameter mcPropChar_Sizes.

Output

Values

Returns a single value, a 1-dimensional array, or a 2-dimensional array of values for the selected Characteristic.

Return Value

The return value indicates the status of the function call as a signed 32-bit integer. Zero means the function executed successfully. A negative value specifies an error, which means the function did not perform the expected behavior. A positive value specifies a warning, which means the function performed as expected, but a condition arose that may require attention.

Use the mcStatusToString function of the ECU M&C API to obtain a descriptive string for the return value.

Description

mcCharacteristicRead reads values from a named Characteristic on the ECU which is identified by the ECU Reference handle. The function returns a scaled double, 1D, or 2D array.

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