Analog

Defines
#define	AN0   0x00
	Analog port 0.
#define	AN1   0x01
	Analog port 1.
#define	AN2   0x02
	Analog port 2.
#define	AN3   0x03
	Analog port 3.
#define	AN4   0x04
	Analog port 4.
#define	AN5   0x05
	Analog port 5.
#define	AN6   0x06
	Analog port 6.
#define	AN7   0x07
	Analog port 7.
#define	AN8   0x08
	Analog port 8.
#define	AN9   0x09
	Analog port 9.
#define	AN10   0x0a
	Analog port 10.
#define	AN11   0x0b
	Analog port 11.
#define	AN12   0x0c
	Analog port 12.
#define	AN13   0x0d
	Analog port 13.
#define	AN14   0x0e
	Analog port 14.
#define	AN15   0x0f
	Analog port 15.
#define	EXT_MUX   AN7
	EXT_MUX analog port.
#define	WHEEL_PORT   AN10
	Analog port for the wheel.
#define	BATT_PORT   AN11
	Analog port for the battery voltage detector.
Functions
void	analog_init (void)
	Initialize analog ports.
unsigned int	analog8 (int which)
	Read an 8-bit number from an analog port.
unsigned int	analog10 (int which)
	Read a 10-bit number from an analog port.
int	wheel (void)
	Read the position of the wheel.

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Detailed Description

Functions for manipulation the ADC on the dragonfly board. All definitions may be found in analog.h.

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Function Documentation

unsigned int analog10 (  int  which  )

Read a 10-bit number from an analog port. Reads a ten bit number from the specified port. analog_init must be called before using this function. Parameters: which  the analog port to read from. Typically a constant, one of AN0 - AN7. Returns: the ten bit number input to the specified port See also: analog_init, analog8

unsigned int analog8 (  int  which  )

Read an 8-bit number from an analog port. Reads an eight bit number from an analog port. analog_init must be called before using this function. Parameters: which  the analog port to read from. One of the constants AN0 - AN7. Returns: the eight bit input to the specified port See also: analog_init, analog10

void analog_init (  void   )

Initialize analog ports. Initializes the ADC. Call analog_init before reading from the analog ports. See also: analog8, analog10

int wheel (  void   )

Read the position of the wheel. Returns the current position of the wheel, as an integer in the range 0 - 255. analog_init must be called before using this function. Returns: the orientation of the wheel, as an integer in the range 0 - 255. See also: analog_init

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