Analog To Digital Converter

R2026b

Convert analog signal on ADC input pin to digital signal

Since R2026a

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Analog To Digital Converter block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Embedded Coder Support Package for Renesas RA Microcontrollers / Renesas RA6 Based

Description

Use the Analog to Digital Converter block to convert the analog value at an ADC input pin to a digital value. This block uses the r_adc_b ADC peripheral, which is available on the RA6T2 device series. The block output is a 1-by-N row vector depending on the number of conversions N. The block measures the voltage of an analog pin relative to the analog input reference voltage on Renesas RA Microcontrollers.

Note

Continuous scan mode is not supported. The block performs single-scan conversions only.

Examples

Using Analog to Digital Converter Block with Renesas RA Microcontrollers

Digitize analog signals on Renesas® RA microcontrollers using the Analog to Digital Converter (ADC) block in Simulink® with Embedded Coder® Support Package for Renesas RA Microcontrollers. In this example, you measure the on-chip temperature sensor on a Renesas MCK-RA6T2 board and convert raw ADC values into temperature readings.

• Open Live Script

Ports

Input

Trigger — Port to trigger conversion

scalar

Convert analog signal on ADC input pin to digital signal.

Triggers the ADC input pin for conversion.

• 1 - ADC start of conversion is triggered

• 0 - ADC start of conversion is not triggered

Dependencies

To enable this port, set the Trigger mode parameter to Trigger only.

Data Types: Boolean

Output

Cnts — Counts

scalar

The block outputs the digital values of selected analog channels converted from the Analog to Digital Converter (ADC) as a 1-by-N row vector, where N is the number of conversions.

Dependencies

To enable this port, set the Trigger mode parameter to either Trigger and read or Read results only.

Data Types: uint16

Status — Status of ADC

scalar

The block outputs the ADC block status.

When the trigger mode is Trigger and Read or Read results only the block outputs the following status:

• 0 - output counts are valid.

• 1 - output counts are not available or overrun flag is set.

When the trigger mode is Trigger only the block outputs the following status:

• 0 - when ADC is triggered

• 1 - when ADC is not triggered

Dependencies

To enable this port, select the Output status parameter.

Data Types: int32

Parameters

Stack ID — ADC module for conversion

'g_adc0' (default)

Specify the unique identifier for the ADC stack to be used for conversion. This string links the Analog to Digital Converter block to a specific ADC hardware instance or configuration. Click Get Stack Info to retrieve the Stack ID from the linked RA Smart Configurator project, or specify it manually in character array format.

Programmatic Use

Block Parameter: StackID

Conversion group — Option for ADC conversion

'Scan Group 0' (default) | 'Scan Group 1'

Select Scan Group 0 or Scan Group 1 for ADC conversion within the selected ADC module.

Programmatic Use

Block Parameter: GroupId

Trigger mode — Option to trigger ADC start of conversion

Trigger and read (default) | Trigger only | Read results only

Select how conversion is handled for this block. Some options trigger a new conversion, while option such as Read results only simply read the result of a previous conversion without starting a new one.

• Trigger and read — Select this option to trigger ADC start of conversion at every sample time. The block output waits until the conversion is complete and emits the results. This option enables the output port Cnts.

• Trigger only — Use this option to trigger start of ADC conversion of specified conversion group with Stack ID and Conversion group in triggered or enabled subsystems. As the block does not show the conversion results in this mode, use another Analog to Digital Converter block with the Trigger mode parameter set to Read results only to display the conversion results.

• Read results only — Select this option to read converted data. Check the Output status port to determine data validity: 0 indicates a successful read; any nonzero value indicates an error. This option also enables the output port Cnts.

Programmatic Use

Block Parameter: TriggerMode

Number of conversions — Number of ADC conversions

1 (default)

Specify the number of conversions the ADC module should perform in one operation. This value determines how many analog-to-digital conversion results will be read and output by the block. The block will wait for the specified number of conversions to complete before outputting the results as a 1-by-N row vector, where N is the number of conversions.

Note

Set the number of conversions to match the number of channels configured for the scan group in the RA Smart Configurator (RASC) project.

Dependencies

To enable this parameter, set the Trigger mode parameter to either Trigger and read or Read results only.

Programmatic Use

Block Parameter: NumberOfConversions

Output status — Enable output status

off (default) | on

When you select this parameter, the block configures Status output port. The Status port outputs the status of the ADC conversion.

Programmatic Use

Block Parameter: OutputStatus

Sample time — Frequency at which block reads pin value

-1 (default) | non-negative real value

Specify how often (in seconds) the block reads the pin value. Enter a value greater than zero. When you specify this parameter as -1, Simulink^® determines the best sample time for the block based on the block context within the model.

Dependencies

To enable the Sample time parameter, set the Trigger mode parameter to either Trigger and read or Read results only.

Programmatic Use

Block Parameter: SampleTime

Version History

Introduced in R2026a