Jacob Isakson / Mbed 2 deprecated AFG_project

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SignalGenDAC Class Reference
Public Member Functions

SignalGenDAC Class Reference

The Signal Generator DAC Driver. More...

#include <SignalGenDAC.h>

Public Member Functions

 SignalGenDAC (PinName aout=p18, float minV=0.0, float maxV=3.3)
 Constructor, which is used to define the hardware.
 ~SignalGenDAC ()
 Destructor.
void PrepareWaveform (SG_Waveform mode, float frequency, float dutycycle, float voltage, float offset)
 Create the waveform in the private memory buffer that is used to DMA to the DAC.
void Start (bool oneShot=false)
 Start the signal, in either a oneshot, or continuous mode.
void Stop (void)
 Stop the signal, if it is running.
bool isRunning (void)
 Determine if the signal is running.

Detailed Description

The Signal Generator DAC Driver.

This class provides the interface to first configure the DAC hardware characteristics, and then to define and control the DAC output.

A choice of waveforms is available (Sine, Square, Triangle, Sawtooth, and User Defined.

 SignalGenDAC g_signal;            // defaults to LPC1768 mbed module (p18 and 3.3v)
 
 g_signal.PrepareWaveform(SG_SINE, 1000, 50, 2.2, 1.5);
 g_signal.Start();
 wait_ms(1000);
 g_signal.Stop();

Definition at line 35 of file SignalGenDAC.h.

Constructor & Destructor Documentation

SignalGenDAC ( PinName  aout = p18,
float  minV = 0.0,
float  maxV = 3.3 
)

Constructor, which is used to define the hardware.

The default parameters are based on the mbed LPC1768 micro, which has AnalogOut on p18 and uses a 3.3v supply for the A/D reference.

Parameters:
[in]aoutis the analog output pin
[in]minVis based on the A/D low reference voltage (default 0.0)
[in]maxVis based on the A/D high reference voltage (default 3.3)

Definition at line 31 of file SignalGenDAC.cpp.

~SignalGenDAC (  )

Destructor.

Definition at line 36 of file SignalGenDAC.cpp.

Member Function Documentation

bool isRunning ( void   )

Determine if the signal is running.

Returns:
true if the signal is running.

Definition at line 80 of file SignalGenDAC.h.

void PrepareWaveform ( SG_Waveform  mode,
float  frequency,
float  dutycycle,
float  voltage,
float  offset 
)

Create the waveform in the private memory buffer that is used to DMA to the DAC.

Parameters:
[in]modedefines the waveform: Sine, Square, Triangle, Sawtooth, User
[in]frequencydefines the desired frequency
[in]dutycycledefined the duty cycle of the waveform to be created. The value is range limited to 5 to 95 (representing 5 to 95 %).
[in]voltageis the peak-to-peak voltage, and it range limited to 0 to 3.0.
[in]offsetis the offset voltage, and is range limited to 0 to 3.0.

Definition at line 102 of file SignalGenDAC.cpp.

void Start ( bool  oneShot = false )

Start the signal, in either a oneshot, or continuous mode.

Parameters:
[in]oneShotdefaults false, which causes continuous mode. When set true, one cycle is produced.

Definition at line 39 of file SignalGenDAC.cpp.

void Stop ( void   )

Stop the signal, if it is running.

Definition at line 92 of file SignalGenDAC.cpp.

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