photosensor.c File Reference

#include "t89c51cc02.h"
#include "datatypes.h"
#include "photosensor.h"
#include "adc.h"
#include "sharp.h"
#include <stdlib.h>

Go to the source code of this file.

Functions
void	Photosensor_init ()
	initialize photosensor subsystem
void	Photosensor_toggle (void)
	toggles LED of selected photosensor
WORD	Photosensor_read (BYTE sensornr)
	read the value of a single photosensor
Variables
BYTE	psensor
const char	psensor_select [] = {0,0x08,0x10,0x20,0x40,0x80,0,0}

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Detailed Description

Definition in file photosensor.c.

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Function Documentation

void Photosensor_init (  void   )

initialize photosensor subsystem The photosensors are turned off by default. Definition at line 31 of file photosensor.c. References Photosensor_PowerOff, and psensor. Referenced by main().

WORD Photosensor_read (  BYTE  sensornr  )

read the value of a single photosensor The given sensor is activated first and than sampled with a simple differential scheme. Parameters: sensornr  number of photo sensor to read Returns: voltage value of given sensor Definition at line 79 of file photosensor.c. References ADC(), Photosensor_PowerOff, Photosensor_select, and SHARP_PWRCTL. Referenced by main().

void Photosensor_toggle (  void   )

toggles LED of selected photosensor The photosensor is selected with the Photosensor_select function. Invalid sensor numbers will turn off all photosensors. Definition at line 44 of file photosensor.c. References Photosensor_PowerOff, Photosensor_select, and psensor.

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Variable Documentation

BYTE psensor

stores number of active photosensor Definition at line 21 of file photosensor.c. Referenced by Photosensor_init(), and Photosensor_toggle().

const char psensor_select[] = {0,0x08,0x10,0x20,0x40,0x80,0,0}

bit masks to activate 1 of 5 photo sensors Definition at line 24 of file photosensor.c.

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