Audio

The hardware abstraction layer only supports a minimal audio interface. It is only possible to play a single short tone. Any platform that wants to support audio should implement this function.

Functions

Functions

void audioTone(uint32_t frequency)

Plays a tone.

Each hardware platform that supports playing audio should implement this method to play a short tone of a given frequency. This is the only supported audio playback. Configuration for a “silent mode” is not covered by this function and should be checked by the caller.

Parameters:

• frequency – [in] the frequency of the note to play in mHz

void fnSetVolume(uint16_t volume)

Set Buzzer volume on the calculator.

Only relevant for the DMCP version, not used for the simulator Input : volume level from 0 to 11

void fnGetVolume(uint16_t volume)

Get Buzzer volume on the calculator.

Only relevant for the DMCP version, not used for the simulator Output : volume level from 0 to 11

void fnVolumeUp(uint16_t unusedButMandatoryParameter)

Increase Buzzer volume on the calculator.

Only relevant for the DMCP version, not used for the simulator

void fnVolumeDown(uint16_t unusedButMandatoryParameter)

Decrease Buzzer volume on the calculator.

Only relevant for the DMCP version, not used for the simulator

void squeak()

DM42 squeak sound Only relevant for the DMCP version, not used for the simulator.

void fnBuzz(uint16_t unusedButMandatoryParameter)

Play a sound on the buzzer whose frequency is in Y and duration in X.

Only relevant for the DMCP version, not used for the simulator

void fnPlay(uint16_t regist)

Play a melody on the buzzer whose notes frequency and durations are in a Nx2 matrix.

Only relevant for the DMCP version, not used for the simulator

uint16_t getBeepVolume()

Example

To play the note C with frequency 277.183Hz, you would call

audioTone(277183);

Note that frequencies are in mHz.