step.h

嵌入式linux学习之uclinux步进电机驱动实例（测试平台S3C44B0X,uclinux系统）

#define   STEPPER_SET_DEBUG             0X1641 
#define   STEPPER_SET_SKIPTICKS         0X1642
#define   STEPPER_SET_VERBOSE_IO        0X1643 
#define   STEPPER_SET_VERVOSE_MOVE      0X1644 
#define   STEPPER_START                 0X1645 
#define   STEPPER_STOP                  0X1646 
#define   STEPPER_CLEAR_BUFFERS         0X1647 
#define   STEPPER_NOAUTO                0X1648
#define   STEPPER_AUTO                  0X1649

#include <linux/kernel.h>
#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/tqueue.h>
#include <asm/segment.h>
#include <asm/io.h>
#include <string.h>
#include <ring.h>
ring_buffer_t read_buffer;
ring_buffer_t write_buffer;
static int irq = 0;
static int major = 31;
static int stepper_major = 0;
struct wait_queue *read_wait = NULL;
struct wait_queue *write_wait = NULL;
static int verbose_io;
static int verbose_move;
static int base = 0x378;
static int power_down_on_exit = 1;
static int delay = 50000;
static int fastdelay = 0;
static int do_io = 1;
static int read_is_sleeping = 0;
static int write_is_sleeping = 0;
static int abort_read = 0;
static int abort_write = 0;
static int read_is_open = 0;
static int write_is_open = 0;
static int interrupts_are_enabled = 0;
static int autostart = 1;
static int tick_counter = 0;
int xdest = 0;
int xuser = 0;
int xpos = 0;

int ydest = 0;
int yuser = 0;
int ypos = 0;

int zdest = 0;
int zuser = 0;
int zpos = 0;

unsigned short word;

void verbose_outb(int port, int value)
{
	printf("outb(%02X, %04X)", port, value);
}

void report_status()
{
	char buf[128];
	int rc;
	int i;
	int len;

	sprintf(buf, "x = %d, y = %d, z = %d,word = %08X\n", xpos, ypos, zpos, word);
	len = strlen(buf);
	for(i = 0; i < len; i++){
		rc = ring_buffer_write(&read_buffer, &buf[i], 1);
	}
	if(read_is_sleeping){
		wake_up_interruptible(&read_wait);
	}

}