orcus.h File Reference

Main header file for Orcus functions. More...

#include <stdint.h>
#include <stdbool.h>
#include <uart.h>
#include <rgb.h>
#include <2d.h>
#include <audio.h>
#include <arm940.h>
#include <sd.h>
#include <lcd.h>
#include <dma.h>
#include <timer.h>
#include <cachemmu.h>

Macros
#define	A   (1<<0)
	Button.
#define	B   (1<<1)
	Button.
#define	DOWN   (1<<7)
	Button.
#define	DOWN_LEFT   (1<<12)
	Button.
#define	DOWN_RIGHT   (1<<13)
	Button.
#define	L   (1<<17)
	Button.
#define	LEFT   (1<<8)
	Button.
#define	R   (1<<18)
	Button.
#define	RIGHT   (1<<9)
	Button.
#define	SELECT   (1<<5)
	Button.
#define	START   (1<<4)
	Button.
#define	STICK   (1<<16)
	Button.
#define	UP   (1<<6)
	Button.
#define	UP_LEFT   (1<<10)
	Button.
#define	UP_RIGHT   (1<<11)
	Button.
#define	VOL_DOWN   (1<<15)
	Button.
#define	VOL_UP   (1<<14)
	Button.
#define	X   (1<<2)
	Button.
#define	Y   (1<<3)
	Button.

Functions
uint32_t	btnState ()
	Get current button state. More...
uint32_t	btnStateDebounced ()
	Get current button state (debounced). More...
void	gp2xInit ()
	Initialise GP2X. More...
bool	gp2xIsF200 ()
	Check if running on an F200. More...
void	gp2xSetCpuSpeed (unsigned int mhz)
	Set the CPU clock speed. More...
void	gp2xSetDefaultRamTimings ()
	Set default recommended RAM timings. More...
void	gp2xSetFastRamTimings ()
	Set faster RAM timings. More...
void	gp2xSetRamTimings (int tRC, int tRAS, int tWR, int tMRD, int tRFC, int tRP, int tRCD)
	Set custom RAM timings. More...

Function Documentation

btnState()

uint32_t btnState

(

)

Get current button state (raw).

One can check for a particular button state using &.

For example:

(btnState() & START)

Returns

Currently pressed buttons OR-ed together.

See also

A

btnStateDebounced()

uint32_t btnStateDebounced

(

)

Get current button state. This function debounces presses to give a reliable indicator.

One can check for a particular button state using &.

For example:

(btnStateDebounced() & START)

Returns

Currently pressed buttons OR-ed together.

See also

A

gp2xInit()

void gp2xInit

(

)

Initialise the GP2X hardware and set up system calls. This must be called before using any other functions from Orcus.

gp2xIsF200()

bool gp2xIsF200

(

)

Check if running on an F200. This tests to see if the NET2272 chip (only fitted to F100s) is present.

Returns

true if running on an F200, false if running on an F100

gp2xSetCpuSpeed()

void gp2xSetCpuSpeed

(

unsigned int

mhz

)

Set the CPU clock speed (both ARM920T and ARM940T use the same clock source).

gp2xSetDefaultRamTimings()

void gp2xSetDefaultRamTimings

(

)

Equivalent to gp2xSetRamTimings(7, 15, 2, 7, 7, 7, 7)

See also

gp2xSetRamTimings

gp2xSetFastRamTimings()

void gp2xSetFastRamTimings

(

)

Equivalent to gp2xSetRamTimings(5, 3, 0, 0, 0, 1, 1)

See also

gp2xSetRamTimings

gp2xSetRamTimings()

void gp2xSetRamTimings	(	int	tRC,
		int	tRAS,
		int	tWR,
		int	tMRD,
		int	tRFC,
		int	tRP,
		int	tRCD
	)

Sets RAM timing registers in MMSP2.