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DSADC

Measure voltage of analog input pin using delta-sigma conversion

Since R2023b

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  • DSADC block

Libraries:
Embedded Coder Support Package for Infineon AURIX TC4x Microcontrollers / AURIX TC4x

Description

The DSADC block measures the voltage of an analog input pin using delta-sigma conversion.

It outputs the voltage as an unsigned or signed 16-bit count formatted as an N-by-1 array. The delta-sigma conversion process can utilize either the on-chip modulator or the external modulator, which you select in the DSADC Peripheral Configuration tool. The block provides the conversion results continuously based on the filter parameters that you specify when configuring the DSADC peripheral in the Hardware Mapping tool.

Ports

Output

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The block outputs the voltage as a 16-bit count formatted as an N-by-1 array, where N varies based on the parameter values, as shown in this table.

Read ModeFIFOTimestampValid FIFO LevelSize of Result
Number of 16-bit data to read: 1DisableDisableStage 11-by-1
EnableDisableStage 11-by-1
Stage 22-by-1
Stage 33-by-1
Stage 44-by-1
EnableStage 21-by-1
Stage 32-by-1
Stage 43-by-1
Number of 16-bit data to read: 2EnableDisableStage 22-by-1
Stage 44-by-1
EnableStage 43-by-1

Data Types: uint16 | int16

The block outputs the auxiliary result as a 16-bit value. Use this port to obtain to obtain immediate result of conversion, bypassing the offset and integrator filter stages during conversion.

Dependencies

To enable this port, select the Auxiliary Result parameter.

Data Types: uint16

The block outputs the current value of the 16-bit timestamp counter.

Dependencies

To enable this port, select the Enable timestamp parameter.

Data Types: uint16 | int16

Parameters

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Select this parameter to enable the aux_result output port. The block outputs the auxiliary result as a signed or unsigned 16-bit value.

Selection of this parameter enables the related parameters in the DSADC Peripheral Configuration.

Select to enable the timestamp.

When you select the Enable timestamp parameter, the block configures an additional output port, timestamp.

Selection of this parameter enables options in the Timestamp tab and Timestamp event (under Events tab) in the DSADC Peripheral Configuration.

Note

Configure the trigger signal before selecting the Enable timestamp parameter, since the timestamp is always associated with a trigger signal. Otherwise, the FIFO functionality does not work, as timestamp is flushed into FIFO first and then to the result registers.

Select this parameter to enable the FIFO register.

Enabling this parameter results in the addition of two new parameters – Number of 16 bit data to read and FIFO Level.

Number of 16 bit data to read.

Specify 2 to fetch the data faster from the FIFO register.

Level of the FIFO register for data transfer.

The option 1 appears if you disable Enable Timestamp

Specify in seconds how often the block should read the analog pin(s).

When you specify this parameter as -1, Simulink® determines the best sample time for the block based on the block context within the model.

Specify the data type of the output at result port.

Version History

Introduced in R2023b

See Also