semf::AnalogOutDma Class Reference

Interface for using DAC (Digital to Analog Converter) hardware module in DMA (Direct Memory Access) mode. More...

#include <analogoutdma.h>

Inheritance diagram for semf::AnalogOutDma:

Collaboration diagram for semf::AnalogOutDma:

Public Member Functions
virtual	~AnalogOutDma ()=default
virtual void	start () const =0
	Starts the hardware module (DAC) for writing DAC values to the output. More...
virtual void	stop () const =0
virtual void	setData (const uint8_t data[], size_t dataSize)=0
	Sets the pointer to the data memory location and its size for starting DAC later by start() function. to output them on the AnalogOutDma pin. More...

Public Attributes
Signal	dataWritten
Signal< Error >	error

Detailed Description

Interface for using DAC (Digital to Analog Converter) hardware module in DMA (Direct Memory Access) mode.

dataWritten signal is emitted after data writing to output has finished.

Definition at line 24 of file analogoutdma.h.

Constructor & Destructor Documentation

~AnalogOutDma()

virtual semf::AnalogOutDma::~AnalogOutDma ( )

virtualdefault

Member Function Documentation

setData()

virtual void semf::AnalogOutDma::setData ( const uint8_t  data[], size_t  dataSize  )

pure virtual

Sets the pointer to the data memory location and its size for starting DAC later by start() function. to output them on the AnalogOutDma pin.

Note

For using halfword DAC setting, use a uint16_t array, cast it to uint8_t* and double the size of the array. For using word DAC setting, use a uint32_t array, cast it to uint8_t* and multiple the size of the array by four.

Parameters

data	Pointer to the digital to analog value array.
dataSize	Byte size of the value array

Implemented in semf::Stm32AnalogOutDma.

start()

virtual void semf::AnalogOutDma::start ( ) const

pure virtual

Starts the hardware module (DAC) for writing DAC values to the output.

Attention

Call setData() before. Otherwise will call error signal.

Implemented in semf::Stm32AnalogOutDma.

stop()

virtual void semf::AnalogOutDma::stop ( ) const

pure virtual

Stops the DAC hardware.

Implemented in semf::Stm32AnalogOutDma.

Member Data Documentation

dataWritten

Signal semf::AnalogOutDma::dataWritten

Signal is emitted after hardware write cycle is finished.

Definition at line 47 of file analogoutdma.h.

error

Signal<Error> semf::AnalogOutDma::error

Signal is emitted after an hardware error occurred.

Definition at line 49 of file analogoutdma.h.