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Knowledge base » Software reference » DAC – Analog outputs

DAC – Analog outputs

By  Benoît Steinmann Updated on SD004

Table of Contents

The DAC block applies a given value to one of the four analog outputs of the B-Box RCP. The corresponding hardware specifications are available in the B-Box datasheet.

Signal specification

The input signal is the value to apply to the analog output specified in volts (-5V to 5V). The output is saturated beyond these limits.

Standard parameters

  • Device ID selects which B-Box/B-Board to address when used in a multi-device configuration.
  • Analog output channel selects a physical analog output channel (0 to 3)
Analog output Simulink dialog parameters

PLECS block

Signal specification

The input signal is the value to apply to the analog output specified in volts (-5V to 5V). The output is saturated beyond these limits.

Analog output PLECS block

Standard parameters

  • Device ID selects which B-Box/B-Board to address when used in a multi-device configuration.
  • Analog output channel(s) (vectorizable) selects a physical analog output channel(s) (0 to 3).
Analog output PLECS dialog parameters

C++ functions

void Dac_SetVoltage(unsigned int output, float voltage, unsigned int device=0);Code language: C++ (cpp)

Sets the value of an analog output in volts.

Parameters

  • output: the analog output channel (0 to 3)
  • voltage: the value to output in volts (-5V to 5V, saturated if over- / under-voltage)
  • device: the id of the B-Box/B-Board to address (optional, used in multi-device configuration only)
void Dac_SetValue(unsigned int output, unsigned int value, unsigned int device=0);Code language: C++ (cpp)

Sets the value of an analog output using a raw 16-bit value.

value=0 → output = -5V, value=65535 → output = 5V

Parameters

  • output: the analog output channel (0 to 3)
  • value: the raw 16-bit value, saturated if overflow
  • device: the id of the B-Box/B-Board to address (optional, used in multi-device configuration only)

Benoit is an embedded systems expert and the leader of software and firmware developments at imperix. On the knowledge base, he is the author of numerous software reference documents.

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