seg7_driver.h

嵌入式开发试验：七段数码管实验

/*
 *	seg7_driver.h - header file of seg7 driver
 *	
 *	Author: 	li ming <[e-mail]>
 *	Date:		2005-6-11
 *	Copyleft:	http://www.lumit.org
 */

#ifndef SYSCFG
#define SYSCFG      0x03FF0000
#endif
 
#ifndef IOPMOD
#define IOPMOD          (*((volatile unsigned *)(SYSCFG+0x5000)))
#endif

#ifndef IOPDATA
#define IOPDATA         (*((volatile unsigned *)(SYSCFG+0x5008)))
#endif

//zhaoic:warning use a no-used address as seg7's base address
#define SEG7_BASE	0x03fdc000 		//necs3 0x03fdc000 - 0x03fe0000
#define SEG7		(*(volatile unsigned int *)(SEG7_BASE))

#define SEG7_NUM		8

#define	SEG_A		(0x1<<0)
#define	SEG_B		(0x1<<1)
#define	SEG_C		(0x1<<2)
#define	SEG_D		(0x1<<4)
#define	SEG_E		(0x1<<5)
#define	SEG_F		(0x1<<6)
#define	SEG_G		(0x1<<7)
#define	SEG_DP		(0x1<<3)

int seg7_open( void );

int seg7_read( char * buf, int count );

int seg7_write( char * buf, int count );

int seg7_ioctl( unsigned int cmd, unsigned long arg );

int seg7_release( void );