PWM

Generate pulse width modulated waveforms

Since R2024a

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Libraries:
Embedded Coder Support Package for Infineon AURIX TC3x Microcontrollers / AURIX TC3x

Description

The block input controls the duty cycle of the square waveform for the corresponding channel. An input value of 0 produces a 0 percent duty cycle and an input value of 100 produces a 100 percent duty cycle. It accepts N x 1 values of duty cycles corresponding to the N channels selected.

Ports

Input

duty — Input value which determines duty cycle

Float range between [0-100]

The value sent to the block input determines the duty cycle of the square wave that the board outputs on the specified PWM pin specified in PWM Peripheral Configuration.

Data Types: Float

freq — Input port determines frequency of PWM signal

scalar

The freq port determines the frequency of PWM signal for the selected channels. When you enable the frequency port, the port accepts a scalar input value and sets it as the frequency of the timer unit.

Dependencies

To enable this port, select the Enable frequency input parameter.

phase — Phase of selected channel

scalar | vector

The phase port accepts an input value in the range of 0 to 2pi and sets the phase for the corresponding channel. It accepts N x 1 values corresponding to the N channels selected.

Dependencies

To enable this port, set the Enable phase input parameter.

Data Types: single | double

dtm_rise — Rising dead time module

scalar | vector

The dtm_rise port accepts the rising dead time values in seconds. The timer unit selected in the PWM peripheral app should have DTM sub module for this feature. It accepts N x 1 values corresponding to the N channels selected.

Dependencies

To enable this port, set the Enable dead time properties input parameter.

Data Types: Float | int8 | uint8 | int16 | uint16 | int32 | uint32

dtm_fall — Falling dead time module

scalar | vector

The dtm_fall port accepts the falling dead time values in seconds. The timer unit selected in the PWM peripheral app should have DTM sub module for this feature. It accepts N x 1 values corresponding to the N channels selected.

Dependencies

To enable this port, set the Enable dead time properties input parameter.

Data Types: Float | int8 | uint8 | int16 | uint16 | int32 | uint32

start/stop — Option to start or stop the PWM on channel

scalar

This port accepts any positive integer and starts or stops the PWM generation based on the value.

• 0 — Stop PWM generation

• 1 or any positive integer — Start PWM generation

Dependencies

To view this port, disable the Enable dead time properties input parameter.

Data Types: double | uint8 | uint16 | uint32

Output

Status — Status of the PWM module

scalar

The block outputs the status of the PWM module as one of these values:

• 255 — Unknown state

• 0 — Initialized

• 1 — Running

• 2 — Stopped

• 3 — Error

Dependencies

To view this port, set the Enable status output parameter.

Data Types: uint8

msg — SoC Blockset simulation message

bus

The port outputs the PWM bus object in the SoC Blockset™ simulation message format during simulation. The PWM bus object contains the information received by the block at the input ports.

Dependencies

To view this port, select the Enable simulation port parameter.

Parameters

Basic

Enable frequency input — Select to enable input frequency port

off (default) | on

Select this parameter to set the PWM frequency.

When you select the Enable frequency input parameter, the block configures an input port, freq.

Enable phase input — Select to enable input phase port

off (default) | on

Select this parameter to set the phase of selected channel.

When you select the Enable phase input parameter, the block configures an input port, phase.

Enable status output — Select to configure the status port

off (default) | on

When you select the Enable status output parameter, the block configures Status output port.

Enable simulation port — Enable peripheral simulation ports in the block

off (default) | on

Select this parameter to enable peripheral simulation capability.

Note

If you do not have a SoC Blockset license, the Enable simulation port parameter is visible but you cannot enable it.

Advanced

Number of outputs — Select required channels

1 (default) | 2 | 3 | ...

Select the required number of PWM channels to send the duty cycles. The number of channels determines the size of the input ports phase, dtm_rise, and dtm_fall.

The number of channels selected depends on the timer module selection in PWM peripheral configuration app.

• TOM—16 channels are available

• ATOM—8 channels are available

Start PWM after init — Option to generate PWM after initialization

off (default) | on

Select to generate PWM after initialization and disable to manually start and stop PWM generation on channels.

When you disable the Start PWM after init parameter, the block configures an input port, start/stop.

Enable dead time properties input — Select to enable rising and falling input ports

off (default) | on

Select this parameter to determine the PWM dead time value in seconds.

For more information on standard dead time generation, see Dead-Time Module Properties.

Note

Enabling the dead time properties parameter in the block configures the dtm_rise and dtm_fall input ports. To use the dead time functionality, go to PWM Peripheral Configuration in the Hardware Mapping window and configure the corresponding dead time parameters in Module and Channel tabs.

Version History

Introduced in R2024a