photosensor.h File Reference

#include "t89c51cc02.h"
#include "datatypes.h"

Go to the source code of this file.

Defines
#define	PHOTOSENSOR_OFF   0x03
#define	Photosensor_PowerOff()   P3=(P3 & PHOTOSENSOR_OFF)
#define	Photosensor_select(s)   psensor=s; P3=((P3 & PHOTOSENSOR_OFF)|psensor_select[psensor & 0x07])
#define	PHOTOSENSORS_NR   5
Functions
void	Photosensor_init (void)
	initialize photosensor subsystem
void	Photosensor_toggle (void)
	toggles LED of selected photosensor
WORD	Photosensor_read (BYTE)
	read the value of a single photosensor

---

Detailed Description

Definition in file photosensor.h.

---

Define Documentation

#define PHOTOSENSOR_OFF   0x03

bit mask used to turn off all photosensors Definition at line 7 of file photosensor.h.

#define Photosensor_PowerOff (   )     P3=(P3 & PHOTOSENSOR_OFF)

macro to turn off all photosensors Definition at line 9 of file photosensor.h. Referenced by main(), Photosensor_init(), Photosensor_read(), and Photosensor_toggle().

#define Photosensor_select (  s   )     psensor=s; P3=((P3 & PHOTOSENSOR_OFF)|psensor_select[psensor & 0x07])

macro to activate a given photosensor Definition at line 11 of file photosensor.h. Referenced by Photosensor_read(), and Photosensor_toggle().

#define PHOTOSENSORS_NR   5

number of active photosensors Definition at line 13 of file photosensor.h.

---

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.

---