btnut/extras/teco_ssmall/micsampler.h File Reference

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Detailed Description

Sensor interface for Teco Particles SSMALL boards.

Author:

Lukas Winterhalter

#include <sys/types.h>

Functions
void	mic_init (void)
u_short	mic_read (void)
	Reads loudest microphone value.
void	mic_set_leds (u_short mic_val)
	Sets the LEDs according to mic val.

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Function Documentation

void mic_init

(

void

)

Initialize microphone sampling.

This will start a seperate low priority thread that continuously reads microphone values. The ADC is set to free running mode and samples values at 62.5kHz ( clock).

Warning:

Do not use the ADC after this function has been called!

Examples:

sensor-app/senso.c.

u_short mic_read

(

void

)

Reads loudest microphone value.

This function returns the loudest sampled microphone value since the last time it has been called. The values range from 0 to 1023 (loudest).

Returns:

mic value

Examples:

sensor-app/senso.c.

void mic_set_leds

(

u_short

mic_val

)

Sets the LEDs according to mic val.

silence: all LEDs off . one LEDs on . two LEDs on . three LEDs on very loud: all LEDs on

Parameters:

mic_val

microphone value

Examples:

sensor-app/senso.c.

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