s5pv210与stm32 spi通信

以下我我修改的用户空间的驱动:

/*
 * spidev.c -- simple synchronous userspace interface to SPI devices
 *
 * Copyright (C) 2006 SWAPP
 *	Andrea Paterniani 
 * Copyright (C) 2007 David Brownell (simplification, cleanup)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#include 
#include 
#include 
#include 
#include 
#include 

#include 
#include 

#include 

#include 

#define	SPI_IRQ			IRQ_EINT(2)
#define	IRQSTATE		S5PV210_GPH0(2)
#define BUF_SIZE		38
u8 gzsd_buffer[BUF_SIZE];
struct spi_transfer	*gk_xfers;
struct spi_ioc_transfer	*g_uxfers;
/*
 * This supports acccess to SPI devices using normal userspace I/O calls.
 * Note that while traditional UNIX/POSIX I/O semantics are half duplex,
 * and often mask message boundaries, full SPI support requires full duplex
 * transfers.  There are several kinds of internal message boundaries to
 * handle chipselect management and other protocol options.
 *
 * SPI has a character major number assigned.  We allocate minor numbers
 * dynamically using a bitmask.  You must use hotplug tools, such as udev
 * (or mdev with busybox) to create and destroy the /dev/spidevB.C device
 * nodes, since there is no fixed association of minor numbers with any
 * particular SPI bus or device.
 */
#define SPIDEV_MAJOR			153	/* assigned */
#define N_SPI_MINORS			32	/* ... up to 256 */

static DECLARE_BITMAP(minors, N_SPI_MINORS);


/* Bit masks for spi_device.mode management.  Note that incorrect
 * settings for some settings can cause *lots* of trouble for other
 * devices on a shared bus:
 *
 *  - CS_HIGH ... this device will be active when it shouldn't be
 *  - 3WIRE ... when active, it won't behave as it should
 *  - NO_CS ... there will be no explicit message boundaries; this
 *	is completely incompatible with the shared bus model
 *  - READY ... transfers may proceed when they shouldn't.
 *
 * REVISIT should changing those flags be privileged?
 */
#define SPI_MODE_MASK		(SPI_CPHA | SPI_CPOL | SPI_CS_HIGH \
				| SPI_LSB_FIRST | SPI_3WIRE | SPI_LOOP \
				| SPI_NO_CS | SPI_READY)

struct spidev_data {
	dev_t			devt;
	spinlock_t		spi_lock;
	struct spi_device	*spi;
	struct list_head	device_entry;

	/* buffer is NULL unless this device is open (users > 0) */
	struct mutex		buf_lock;
	unsigned		users;
	u8			*buffer;
	int irq;
//add by dao
	wait_queue_head_t rqueue;
};

static flag_poll = 0;
static LIST_HEAD(device_list);
static DEFINE_MUTEX(device_list_lock);

static unsigned bufsiz = 4096;
module_param(bufsiz, uint, S_IRUGO);
MODULE_PARM_DESC(bufsiz, "data bytes in biggest supported SPI message");

/*-------------------------------------------------------------------------*/

/*
 * We can't use the standard synchronous wrappers for file I/O; we
 * need to protect against async removal of the underlying spi_device.
 */
static void spidev_complete(void *arg)
{
	complete(arg);
}

static ssize_t
spidev_sync(struct spidev_data *spidev, struct spi_message *message)
{
	DECLARE_COMPLETION_ONSTACK(done);
	int status;

	message->complete = spidev_complete;
	message->context = &done;
	spin_lock_irq(&spidev->spi_lock);
	if (spidev->spi == NULL)
		status = -ESHUTDOWN;
	else
		status = spi_async(spidev->spi, message);
	spin_unlock_irq(&spidev->spi_lock);

	if (status == 0) {
		wait_for_completion(&done);
		status = message->status;
		if (status == 0)
			status = message->actual_length;
	}
	return status;
}

static inline ssize_t
spidev_sync_write(struct spidev_data *spidev, size_t len)
{
	struct spi_transfer	t = {
			.tx_buf		= spidev->buffer,
			.len		= len,
		};
	struct spi_message	m;

	spi_message_init(&m);
	spi_message_add_tail(&t, &m);
	return spidev_sync(spidev, &m);
}

static inline ssize_t
spidev_sync_read(struct spidev_data *spidev, size_t len)
{
	struct spi_transfer	t = {
			.rx_buf		= spidev->buffer,
			.len		= len,
		};
	struct spi_message	m;
	spi_message_init(&m);
	spi_message_add_tail(&t, &m);
	return spidev_sync(spidev, &m);
}

/*-------------------------------------------------------------------------*/

/* Read-only message with current device setup */
static ssize_t
spidev_read(struct file *filp, char __user *buf, size_t count, loff_t *f_pos)
{
	struct spidev_data	*spidev;
	ssize_t			status = 0;

	/* chipselect only toggles at start or end of operation */
	if (count > bufsiz)
		return -EMSGSIZE;

	spidev = filp->private_data;

	mutex_lock(&spidev->buf_lock);
	status = spidev_sync_read(spidev, count);
	if (status > 0) {
		unsigned long	missing;

		missing = copy_to_user(buf, spidev->buffer, status);
		if (missing == status)
			status = -EFAULT;
		else
			status = status - missing;
	}
	mutex_unlock(&spidev->buf_lock);

	return status;
}

/* Write-only message with current device setup */
static ssize_t
spidev_write(struct file *filp, const char __user *buf,
		size_t count, loff_t *f_pos)
{
	struct spidev_data	*spidev;
	ssize_t			status = 0;
	unsigned long		missing;

	/* chipselect only toggles at start or end of operation */
	if (count > bufsiz)
		return -EMSGSIZE;

	spidev = filp->private_data;

	mutex_lock(&spidev->buf_lock);
	missing = copy_from_user(spidev->buffer, buf, count);
	if (missing == 0) {
		status = spidev_sync_write(spidev, count);
	} else
		status = -EFAULT;
	mutex_unlock(&spidev->buf_lock);

	return status;
}

static int spidev_message(struct spidev_data *spidev,
		struct spi_ioc_transfer *u_xfers, unsigned n_xfers)
{
	struct spi_message	msg;
	struct spi_transfer	*k_xfers;
	struct spi_transfer	*k_tmp;
	struct spi_ioc_transfer *u_tmp;
	unsigned		n, total;
	u8			*buf;
	int			status = -EFAULT;
	spi_message_init(&msg);
	k_xfers = kcalloc(n_xfers, sizeof(*k_tmp), GFP_KERNEL);
	if (k_xfers == NULL)
		return -ENOMEM;
	/* Construct spi_message, copying any tx data to bounce buffer.
	 * We walk the array of user-provided transfers, using each one
	 * to initialize a kernel version of the same transfer.
	 */
	buf = spidev->buffer;
	total = 0;
	for (n = n_xfers, k_tmp = k_xfers, u_tmp = u_xfers;
			n;
			n--, k_tmp++, u_tmp++) {
		k_tmp->len = u_tmp->len;
		total += k_tmp->len;
		if (total > bufsiz) {
			status = -EMSGSIZE;
			goto done;
		}
		if (u_tmp->rx_buf) {
			k_tmp->rx_buf = buf;
			if (!access_ok(VERIFY_WRITE, (u8 __user *)
						(uintptr_t) u_tmp->rx_buf,
						u_tmp->len))
				goto done;
		}
		if (u_tmp->tx_buf) {
			k_tmp->tx_buf = buf;
			if (copy_from_user(buf, (const u8 __user *)
						(uintptr_t) u_tmp->tx_buf,
					u_tmp->len))
				goto done;
		}

		buf += k_tmp->len;

		k_tmp->cs_change = !!u_tmp->cs_change;
		k_tmp->bits_per_word = u_tmp->bits_per_word;
		k_tmp->delay_usecs = u_tmp->delay_usecs;
		k_tmp->speed_hz = u_tmp->speed_hz;
#ifdef VERBOSE
		dev_dbg(&spidev->spi->dev,
			"  xfer len %zd %s%s%s%dbits %u usec %uHz\n",
			u_tmp->len,
			u_tmp->rx_buf ? "rx " : "",
			u_tmp->tx_buf ? "tx " : "",
			u_tmp->cs_change ? "cs " : "",
			u_tmp->bits_per_word ? : spidev->spi->bits_per_word,
			u_tmp->delay_usecs,
			u_tmp->speed_hz ? : spidev->spi->max_speed_hz);
#endif
		spi_message_add_tail(k_tmp, &msg);
	}
	printk("%s :----line is %d\n",__func__,__LINE__);
	status = spidev_sync(spidev, &msg);
	printk("%s :----line is %d\n",__func__,__LINE__);
	if (status < 0)
		goto done;
	/* copy any rx data out of bounce buffer */
	buf = spidev->buffer;
	for (n = n_xfers, u_tmp = u_xfers; n; n--, u_tmp++) {
		if (u_tmp->rx_buf) {
			if (__copy_to_user((u8 __user *)
					(uintptr_t) u_tmp->rx_buf, buf,
					u_tmp->len)) {
				status = -EFAULT;
				goto done;
			}
		}
		buf += u_tmp->len;
	}
	status = total;

done:
	kfree(k_xfers);
	return status;
}

static DECLARE_WAIT_QUEUE_HEAD(gzsd_spi_wait);

static irqreturn_t gzsd_spiread(int irq, void *dev_id)
{
	struct spidev_data *spidev = (struct spidev_data *)dev_id;

	//dev_err(&spidev->spi->dev, "is spi dev now.\n");
	disable_irq_nosync(irq);
	flag_poll = 1;
	//printk("%s:------------line is %d\n",__func__,__LINE__);
#if	1
	wake_up_interruptible(&spidev->rqueue);
#else
	wake_up(&gzsd_spi_wait);
#endif
	//wake_up_interruptible_sync(&spidev->rqueue);
	//wake_up(&spidev->rqueue);
	enable_irq(irq);
	return IRQ_HANDLED;
}

unsigned int gzsd_poll(struct file *filp, poll_table *wait)
{
	struct spidev_data	*spidev;
	spidev = filp->private_data;
	unsigned int mask = 0;
	//printk("%s:------------line is %d\n",__func__,__LINE__);
#if	1
	poll_wait(filp, &spidev->rqueue, wait);
#else
	poll_wait(filp, &gzsd_spi_wait, wait);
#endif
	if(flag_poll) {
		mask = POLLIN | POLLRDNORM; //can be read
		flag_poll = 0;
	}
	return mask;
}

static long
spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	int			err = 0;
	int			retval = 0;
	struct spidev_data	*spidev;
	struct spi_device	*spi;
	u32			tmp;
	unsigned		n_ioc;
	struct spi_ioc_transfer	*ioc;

	/* Check type and command number */
	if (_IOC_TYPE(cmd) != SPI_IOC_MAGIC)
		return -ENOTTY;

	/* Check access direction once here; don't repeat below.
	 * IOC_DIR is from the user perspective, while access_ok is
	 * from the kernel perspective; so they look reversed.
	 */
	if (_IOC_DIR(cmd) & _IOC_READ)
		err = !access_ok(VERIFY_WRITE,
				(void __user *)arg, _IOC_SIZE(cmd));
	if (err == 0 && _IOC_DIR(cmd) & _IOC_WRITE)
		err = !access_ok(VERIFY_READ,
				(void __user *)arg, _IOC_SIZE(cmd));
	if (err)
		return -EFAULT;

	/* guard against device removal before, or while,
	 * we issue this ioctl.
	 */
	spidev = filp->private_data;

	spin_lock_irq(&spidev->spi_lock);
	spi = spi_dev_get(spidev->spi);
	spin_unlock_irq(&spidev->spi_lock);

	if (spi == NULL)
		return -ESHUTDOWN;

	/* use the buffer lock here for triple duty:
	 *  - prevent I/O (from us) so calling spi_setup() is safe;
	 *  - prevent concurrent SPI_IOC_WR_* from morphing
	 *    data fields while SPI_IOC_RD_* reads them;
	 *  - SPI_IOC_MESSAGE needs the buffer locked "normally".
	 */
	mutex_lock(&spidev->buf_lock);

	switch (cmd) {
	/* read requests */
	case SPI_IOC_RD_MODE:
		retval = __put_user(spi->mode & SPI_MODE_MASK,
					(__u8 __user *)arg);
		break;
	case SPI_IOC_RD_LSB_FIRST:
		retval = __put_user((spi->mode & SPI_LSB_FIRST) ?  1 : 0,
					(__u8 __user *)arg);
		break;
	case SPI_IOC_RD_BITS_PER_WORD:
		retval = __put_user(spi->bits_per_word, (__u8 __user *)arg);
		break;
	case SPI_IOC_RD_MAX_SPEED_HZ:
		retval = __put_user(spi->max_speed_hz, (__u32 __user *)arg);
		break;

	/* write requests */
	case SPI_IOC_WR_MODE:
		retval = __get_user(tmp, (u8 __user *)arg);
		if (retval == 0) {
			u8	save = spi->mode;

			if (tmp & ~SPI_MODE_MASK) {
				retval = -EINVAL;
				break;
			}

			tmp |= spi->mode & ~SPI_MODE_MASK;
			spi->mode = (u8)tmp;
			retval = spi_setup(spi);
			if (retval < 0)
				spi->mode = save;
			else
				dev_dbg(&spi->dev, "spi mode %02x\n", tmp);
		}
		break;
	case SPI_IOC_WR_LSB_FIRST:
		retval = __get_user(tmp, (__u8 __user *)arg);
		if (retval == 0) {
			u8	save = spi->mode;

			if (tmp)
				spi->mode |= SPI_LSB_FIRST;
			else
				spi->mode &= ~SPI_LSB_FIRST;
			retval = spi_setup(spi);
			if (retval < 0)
				spi->mode = save;
			else
				dev_dbg(&spi->dev, "%csb first\n",
						tmp ? 'l' : 'm');
		}
		break;
	case SPI_IOC_WR_BITS_PER_WORD:
		retval = __get_user(tmp, (__u8 __user *)arg);
		if (retval == 0) {
			u8	save = spi->bits_per_word;

			spi->bits_per_word = tmp;
			retval = spi_setup(spi);
			if (retval < 0)
				spi->bits_per_word = save;
			else
				dev_dbg(&spi->dev, "%d bits per word\n", tmp);
		}
		break;
	case SPI_IOC_WR_MAX_SPEED_HZ:
		retval = __get_user(tmp, (__u32 __user *)arg);
		if (retval == 0) {
			u32	save = spi->max_speed_hz;

			spi->max_speed_hz = tmp;
			retval = spi_setup(spi);
			if (retval < 0)
				spi->max_speed_hz = save;
			else
				dev_dbg(&spi->dev, "%d Hz (max)\n", tmp);
		}
		break;

	default:
		/* segmented and/or full-duplex I/O request */
		if (_IOC_NR(cmd) != _IOC_NR(SPI_IOC_MESSAGE(0))
				|| _IOC_DIR(cmd) != _IOC_WRITE) {
			retval = -ENOTTY;
			break;
		}

		tmp = _IOC_SIZE(cmd);
		if ((tmp % sizeof(struct spi_ioc_transfer)) != 0) {
			retval = -EINVAL;
			break;
		}

		n_ioc = tmp / sizeof(struct spi_ioc_transfer);

		if (n_ioc == 0)
			break;

		g_uxfers = kmalloc(tmp, GFP_KERNEL);
		if (!g_uxfers) {
			printk("g_uxfers alloc failed\n");
		}
		if (__copy_from_user(g_uxfers, (void __user *)arg, tmp)) {
			kfree(g_uxfers);
			printk("g_uxfers copy failed\n");
		}

		/* copy into scratch area */
		ioc = kmalloc(tmp, GFP_KERNEL);
		if (!ioc) {
			retval = -ENOMEM;
			break;
		}

		if (__copy_from_user(ioc, (void __user *)arg, tmp)) {
			kfree(ioc);
			retval = -EFAULT;
			break;
		}

		/* translate to spi_message, execute */
		retval = spidev_message(spidev, ioc, n_ioc);
		kfree(ioc);
		break;
	}

	mutex_unlock(&spidev->buf_lock);
	spi_dev_put(spi);
	return retval;
}

static int spidev_open(struct inode *inode, struct file *filp)
{
	struct spidev_data	*spidev;
	int			status = -ENXIO;

	mutex_lock(&device_list_lock);
	
	gk_xfers = kcalloc(1, sizeof (*gk_xfers), GFP_KERNEL);
	if (gk_xfers == NULL)
		printk("alloc gk_xfers_failed\n");

	list_for_each_entry(spidev, &device_list, device_entry) {
		if (spidev->devt == inode->i_rdev) {
			status = 0;
			break;
		}
	}
	if (status == 0) {
		if (!spidev->buffer) {
			spidev->buffer = kmalloc(bufsiz, GFP_KERNEL);
			if (!spidev->buffer) {
				dev_dbg(&spidev->spi->dev, "open/ENOMEM\n");
				status = -ENOMEM;
			}
		}
		if (status == 0) {
			spidev->users++;
			filp->private_data = spidev;
			nonseekable_open(inode, filp);
		}
	} else
		pr_debug("spidev: nothing for minor %d\n", iminor(inode));
	mutex_unlock(&device_list_lock);
	return status;
}

static int spidev_release(struct inode *inode, struct file *filp)
{
	struct spidev_data	*spidev;
	int			status = 0;

	mutex_lock(&device_list_lock);
	spidev = filp->private_data;
	filp->private_data = NULL;

	/* last close? */
	spidev->users--;
	if (!spidev->users) {
		int		dofree;

		kfree(spidev->buffer);
		spidev->buffer = NULL;

		/* ... after we unbound from the underlying device? */
		spin_lock_irq(&spidev->spi_lock);
		dofree = (spidev->spi == NULL);
		spin_unlock_irq(&spidev->spi_lock);

		if (dofree)
			kfree(spidev);
	}
	//disable_irq_nosync(spidev->irq);
	kfree(gk_xfers);
	kfree(g_uxfers);
	mutex_unlock(&device_list_lock);

	return status;
}

static const struct file_operations spidev_fops = {
	.owner =	THIS_MODULE,
	/* REVISIT switch to aio primitives, so that userspace
	 * gets more complete API coverage.  It'll simplify things
	 * too, except for the locking.
	 */
	.write =	spidev_write,
	.read =		spidev_read,
	.unlocked_ioctl = spidev_ioctl,
	.open =		spidev_open,
	.release =	spidev_release,
	.poll		=gzsd_poll,
};

/*-------------------------------------------------------------------------*/

/* The main reason to have this class is to make mdev/udev create the
 * /dev/spidevB.C character device nodes exposing our userspace API.
 * It also simplifies memory management.
 */

static struct class *spidev_class;

/*-------------------------------------------------------------------------*/

static int __devinit spidev_probe(struct spi_device *spi)
{
	struct spidev_data	*spidev;
	int			status;
	unsigned long		minor;
	int err;
	/* Allocate driver data */
	spidev = kzalloc(sizeof(*spidev), GFP_KERNEL);
	if (!spidev)
		return -ENOMEM;

	/* Initialize the driver data */
	spidev->spi = spi;
	spin_lock_init(&spidev->spi_lock);
	mutex_init(&spidev->buf_lock);

	INIT_LIST_HEAD(&spidev->device_entry);

	/* If we can allocate a minor number, hook up this device.
	 * Reusing minors is fine so long as udev or mdev is working.
	 */
	mutex_lock(&device_list_lock);
	minor = find_first_zero_bit(minors, N_SPI_MINORS);
	if (minor < N_SPI_MINORS) {
		struct device *dev;

		spidev->devt = MKDEV(SPIDEV_MAJOR, minor);
		dev = device_create(spidev_class, &spi->dev, spidev->devt,
				    spidev, "spidev%d.%d",
				    spi->master->bus_num, spi->chip_select);
		status = IS_ERR(dev) ? PTR_ERR(dev) : 0;
	} else {
		dev_dbg(&spi->dev, "no minor number available!\n");
		status = -ENODEV;
	}
	if (status == 0) {
		set_bit(minor, minors);
		list_add(&spidev->device_entry, &device_list);
	}

	spidev->irq = SPI_IRQ;

	err = request_irq(spidev->irq, gzsd_spiread, IRQ_TYPE_EDGE_FALLING,"spi", spidev);
	if(err < 0) {
		dev_err(&spidev->spi->dev, "Unable to request spi IRQ.\n");
	}

	init_waitqueue_head(&spidev->rqueue);

	mutex_unlock(&device_list_lock);

	if (status == 0)
		spi_set_drvdata(spi, spidev);
	else
		kfree(spidev);

	return status;
}

static int __devexit spidev_remove(struct spi_device *spi)
{
	struct spidev_data	*spidev = spi_get_drvdata(spi);

	/* make sure ops on existing fds can abort cleanly */
	spin_lock_irq(&spidev->spi_lock);
	spidev->spi = NULL;
	spi_set_drvdata(spi, NULL);
	spin_unlock_irq(&spidev->spi_lock);

	/* prevent new opens */
	mutex_lock(&device_list_lock);
	list_del(&spidev->device_entry);
	device_destroy(spidev_class, spidev->devt);
	clear_bit(MINOR(spidev->devt), minors);
	if (spidev->users == 0)
		kfree(spidev);
	mutex_unlock(&device_list_lock);

	return 0;
}

static struct spi_driver spidev_spi_driver = {
	.driver = {
		.name =		"spidev",
		.owner =	THIS_MODULE,
	},
	.probe =	spidev_probe,
	.remove =	__devexit_p(spidev_remove),

	/* NOTE:  suspend/resume methods are not necessary here.
	 * We don't do anything except pass the requests to/from
	 * the underlying controller.  The refrigerator handles
	 * most issues; the controller driver handles the rest.
	 */
};

/*-------------------------------------------------------------------------*/

static int __init spidev_init(void)
{
	int status;

	/* Claim our 256 reserved device numbers.  Then register a class
	 * that will key udev/mdev to add/remove /dev nodes.  Last, register
	 * the driver which manages those device numbers.
	 */
	BUILD_BUG_ON(N_SPI_MINORS > 256);
	status = register_chrdev(SPIDEV_MAJOR, "spi", &spidev_fops);
	if (status < 0)
		return status;

	spidev_class = class_create(THIS_MODULE, "spidev");
	if (IS_ERR(spidev_class)) {
		unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name);
		return PTR_ERR(spidev_class);
	}

	status = spi_register_driver(&spidev_spi_driver);
	if (status < 0) {
		class_destroy(spidev_class);
		unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name);
	}
	return status;
}
module_init(spidev_init);

static void __exit spidev_exit(void)
{
	spi_unregister_driver(&spidev_spi_driver);
	class_destroy(spidev_class);
	unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name);
}
module_exit(spidev_exit);

MODULE_AUTHOR("Andrea Paterniani, ");
MODULE_DESCRIPTION("User mode SPI device interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:spidev");

位置: drivers/spi

将drivers/spi/Makefile里的spidev.c修改为spidev_gzsd.c

210　spi测试程序如下:

/*
 * SPI testing utility (using spidev driver)
 *
 * Copyright (c) 2007  MontaVista Software, Inc.
 * Copyright (c) 2007  Anton Vorontsov 
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License.
 *
 * Cross-compile with cross-gcc -I/path/to/cross-kernel/include
 */

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include "spidev.h"
//#include 

#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))

#define BUF_SIZE	38
#define READ_SIZE	(BUF_SIZE + 1)

static const char *device = "/dev/spidev0.0";
static uint8_t mode;
static uint8_t bits = 8;
static uint32_t speed = 140000;//140000;
static uint16_t delay;

static void transfer(int fd)
{
	int ret;

	uint8_t tx[] = {
		0x01, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9,
		0xF8, 0xF7, 0xF6, 0xF5, 0xF4, 0xF3,
		0xF2, 0xF1, 0xF0, 0xEF, 0xEE, 0xED,
		0xEC, 0xEB, 0xEA, 0xE9, 0xE8, 0xE7,
		0xE6, 0xE5, 0xE4, 0xE3, 0xE2, 0xE1,
		0xE0, 0xDF, 0xDE, 0xDD, 0xDC, 0xDB,
		0xDA, 0xD9,
	};

	uint8_t rx[ARRAY_SIZE(tx)] = {0, };
	struct spi_ioc_transfer tr = {
		.tx_buf = (unsigned long)tx,
		.rx_buf = (unsigned long)rx,
		.len = ARRAY_SIZE(tx),
		.delay_usecs = delay,
		.speed_hz = speed,
		.bits_per_word = bits,
	};
	ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
#if	1
	if(rx[0] != 0xff)
	{
		for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
			if (!(ret % 6))
				puts("");
			printf("%.2d ", rx[ret]);
		}
		puts("");
	}
#endif
}

static void do_read(int fd, int len)
{
	uint8_t	buf[len], bp[len];
	int		status;

	/* read at least 2 bytes, no more than 32 */
	if (len < 2)
		len = 2;
	else if (len > sizeof(buf))
		len = sizeof(buf);
	memset(buf, 0, sizeof buf);

	status = read(fd, buf, len);
	if (status < 0) {
		printf("read error \n");
		return;
	}
	if (status != len) {
		fprintf(stderr, "short read\n");
		return;
	}
#if	0
	printf("read(%2d, %2d): %02x %02x,", len, status,
		buf[0], buf[1]);
	status -= 2;
	bp = buf + 2;
	while (status-- > 0)
		printf(" %02x", *bp++);
	printf("\n");
#else
	int i;
#if	1
	printf("do read data is :\n");
	for(i = 0;i < len;i++)
		printf("  %d",buf[i]);
	printf("\n");
#else
	for(i = 0;i < (len - 1);i++)
	{
		bp[i] = buf[i+1];
	}
	bp[len-1] = buf[0];
	printf("data is :\n");
	for(i = 0;i < len;i++)
		printf("  %d",bp[i]);
	printf("\n");
#endif
#endif
}

static void do_write(int fd,int cmd)
{
	struct spi_ioc_transfer	xfer;
	//unsigned char		buf[BUF_SIZE], *bp;
	uint8_t			buf[BUF_SIZE], *bp;
	int			status;
	int			len;

	uint8_t tx[] = {
		cmd, (cmd +1), (cmd+2), 0xFB, 0xFA, 0xF9,
		0xF8, 0xF7, 0xF6, 0xF5, 0xF4, 0xF3,
		0xF2, 0xF1, 0xF0, 0xEF, 0xEE, 0xED,
		0xEC, 0xEB, 0xEA, 0xE9, 0xE8, 0xE7,
		0xE6, 0xE5, 0xE4, 0xE3, 0xE2, 0xE1,
		0xE0, 0xDF, 0xDE, 0xDD, 0xDC, 0xDB,
		0xDA, 0xD9,
	};
	//memset(xfer, 0, sizeof xfer);
	memset(buf, 1, sizeof buf);

	len = sizeof buf;
	//buf[0] = cmd;
#if	0
	buf[0] = cmd;
	buf[1] = cmd;

	xfer.tx_buf = (unsigned long)buf;
	xfer.len = len;

	status = ioctl(fd, SPI_IOC_MESSAGE(1), xfer);
	if (status < 0) {
		printf("SPI_IOC_MESSAGE\n");
		return;
	}
	//printf("do write data is %d\n",buf[0]);
	printf("response(%2d, %2d)\n", len, status);
#endif
	status = write(fd,tx,BUF_SIZE);
	if(status < 0)
		printf("do write failed\n");
#if	0
	for (bp = buf; len; len--)
		printf(" %02x", *bp++);
	printf("\n");
#endif

}

int main(int argc, char *argv[])
{
	int ret = 0;
	int fd;
	int data;
	fd_set rds;    
	struct timeval tv;
#if	0
	if(argc < 2) {
		printf("please enter one parameter at least\n");
		return 0;
	}

	data = atoi(argv[1]);
#else
	data = 0;
#endif
	fd = open(device, O_RDWR);
	if (fd < 0)
		printf("can't open device");

	mode = SPI_MODE_1;
	/*
	 * spi mode
	 */
	ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
	if (ret == -1)
		printf("can't set spi mode");

	ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
	if (ret == -1)
		printf("can't get spi mode");

	/*
	 * bits per word
	 */
	ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
	if (ret == -1)
		printf("can't set bits per word");

	ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
	if (ret == -1)
		printf("can't get bits per word");

	/*
	 * max speed hz
	 */
	ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
	if (ret == -1)
		printf("can't set max speed hz");

	ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
	if (ret == -1)
		printf("can't get max speed hz");

	printf("spi mode: %d\n", mode);
	printf("bits per word: %d\n", bits);
	printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);

	//FD_ZERO(&rds);    
	//FD_SET(fd, &rds);
	//tv.tv_sec = 10;
	//tv.tv_usec = 0;
	int i;
	while(1)
	{
		
		FD_ZERO(&rds);    
		FD_SET(fd, &rds);
		tv.tv_sec = 1;
		tv.tv_usec = 0;
		printf("send daia is -----------------------%d\n",data);
		do_write(fd,data);
		sleep(1);	
		ret = select(fd+1,&rds,NULL,NULL,&tv);
		if(ret < 0) {
			printf("select error!\n");
			//break;
		}
		printf("ret is +++++++++++++++++++%d\n",ret);
		if (FD_ISSET(fd, &rds))
			do_read(fd,BUF_SIZE);
		data++;
		if(data > 8)
			data = 0;
		sleep(1);
	}
	close(fd);

	return ret;
}

STM32主函数代码:

#include "stm32f10x.h"
#include "uart.h"
#include "spi.h"


void SPItest(void);
void UARTtest(USART_TypeDef *port);
extern void Uart_SendStringn(USART_TypeDef *port,char *pt,int n);
extern  void Delay_ARMJISHU(__IO uint32_t nCount);

void SPIsend_Init(void)
{
	GPIO_InitTypeDef  GPIO_InitStructure;
//spi send interrupt control
	RCC_APB2PeriphClockCmd (RCC_APB2Periph_GPIOC, ENABLE);//	使能PC,AFIO
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; 
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
	//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //推挽输出 
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //
	GPIO_Init(GPIOC, &GPIO_InitStructure); 
//end
}
void send_onoff(int onoff)
{
	if(onoff)
		GPIO_WriteBit(GPIOC, GPIO_Pin_7, Bit_RESET);
	else
		GPIO_WriteBit(GPIOC, GPIO_Pin_7, Bit_SET);
}

int main(void)
{

  //int i;

	NVIC_Configuration();//配置  NVIC 和 Vector Table 
   
	Uart1_COMInit(115200); //串口1连接v210或PC机

 	SPI1_Init();
	SPIsend_Init();  
	send_onoff(Bit_RESET);

	Uart_SendString(USART1,"串口1开始：\r\n") ;	//串口1接PC机


	while (1)
	{
		 SPItest();
	}
   
}

void send_data(int mode)
{
	int i;
	send_onoff(Bit_SET);
	switch(mode)
	{
		case 0x01:
			for(i=0;i<38;i++)
			{
				SPI_I2S_SendData(SPI1,i + 1);
			}
			break;
		case 0x02:
			for(i=0;i<38;i++)
			{
				SPI_I2S_SendData(SPI1,i + 2);
			}
			break;

		case 0x03:
			for(i=0;i<38;i++)
			{
				SPI_I2S_SendData(SPI1,i + 3);
			}
			break;
		default:
			break;
	}
	send_onoff(Bit_RESET);
	cmd = 0;
	return;
}

void SPItest(void)
{
	int i;
	//static int	x=0;

	if(RxIdx==SPI_BufferSize) //中断方式接收
	{
		cmd = SPI1_Buffer_Rx[0];
		for(i=0;i< RxIdx;i++)
		{
			Uart_SendByte(USART1,SPI1_Buffer_Rx[i]);//向PC机发送
			// SPI_I2S_SendData(SPI1,0xff); 
		 	SPI1_Buffer_Rx[i]=0;
		}
		//while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
		//SPI_I2S_SendData(SPI1,x++);
		//send_onoff(1);
		//SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_RXNE, ENABLE);
		//Delay_ARMJISHU(10000000);
		RxIdx=0;
		SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_RXNE, ENABLE);
	}

	if(cmd)
	send_data(cmd);
 //查询方式接收：
/*
	while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET);
    SPI3_Buffer_Rx[RxIdx++] = SPI_I2S_ReceiveData(SPI3);
	if(RxIdx==SPI_BufferSize)
	{
		for(i=0;i< RxIdx;i++)
		{
	  	Uart_SendByte(USART1,SPI3_Buffer_Rx[i]);//向PC机发送

		}
		RxIdx=0;
	}
*/
}

void UARTtest(USART_TypeDef *port)
{
int i;
	
	for(i=0;i<10;i++)
		Uart_SendByte(port,'0'+i);
	Delay_ARMJISHU(10000000);

}