Email address change in nuttx/

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5145 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 545 insertions, 545 deletions

diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_i2c.c b/nuttx/arch/arm/src/lpc17xx/lpc17_i2c.c
index ccff276e5..48d6fefce 100644
--- a/nuttx/arch/arm/src/lpc17xx/lpc17_i2c.c
+++ b/nuttx/arch/arm/src/lpc17xx/lpc17_i2c.c
@@ -1,545 +1,545 @@
-/*******************************************************************************

- * arch/arm/src/lpc17xx/lpc17_i2c.c

- *

- *   Copyright (C) 2011 Li Zhuoyi. All rights reserved.

- *   Author: Li Zhuoyi <lzyy.cn@gmail.com>

- *   History: 0.1 2011-08-20 initial version

- * 

- * Derived from arch/arm/src/lpc31xx/lpc31_i2c.c

- *

- *   Author: David Hewson

- *

- *   Copyright (C) 2010-2011 Gregory Nutt. All rights reserved.

- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

- *

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions

- * are met:

- *

- * 1. Redistributions of source code must retain the above copyright

- *    notice, this list of conditions and the following disclaimer.

- * 2. Redistributions in binary form must reproduce the above copyright

- *    notice, this list of conditions and the following disclaimer in

- *    the documentation and/or other materials provided with the

- *    distribution.

- * 3. Neither the name NuttX nor the names of its contributors may be

- *    used to endorse or promote products derived from this software

- *    without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

- * POSSIBILITY OF SUCH DAMAGE.

- *

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

-

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

- * Included Files

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

-

-#include <nuttx/config.h>

-

-#include <sys/types.h>

-#include <stdint.h>

-#include <stdbool.h>

-#include <stdlib.h>

-#include <string.h>

-#include <errno.h>

-#include <debug.h>

-

-#include <nuttx/arch.h>

-#include <nuttx/i2c.h>

-

-#include <arch/irq.h>

-#include <arch/board/board.h>

-

-#include "wdog.h"

-#include "chip.h"

-#include "up_arch.h"

-#include "up_internal.h"

-#include "os_internal.h"

-

-

-#include "lpc17_internal.h"

-#include "lpc17_syscon.h"

-#include "lpc17_pinconn.h"

-#include "lpc17_i2c.h"

-

-#if defined(CONFIG_LPC17_I2C0) || defined(CONFIG_LPC17_I2C1) || defined(CONFIG_LPC17_I2C2)

-

-#ifndef GPIO_I2C1_SCL

- #define GPIO_I2C1_SCL GPIO_I2C1_SCL_1

- #define GPIO_I2C1_SDA GPIO_I2C1_SDA_1

-#endif

-#ifndef CONFIG_I2C0_FREQ

- #define CONFIG_I2C0_FREQ 100000

-#endif

-#ifndef CONFIG_I2C1_FREQ

- #define CONFIG_I2C1_FREQ 100000

-#endif

-#ifndef CONFIG_I2C2_FREQ

- #define CONFIG_I2C2_FREQ 100000

-#endif

-

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

- * Definitions

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

-

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

- * Pre-processor Definitions

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

-

-#define I2C_TIMEOUT     ((20 * CLK_TCK) / 1000) /* 20 mS */

-

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

- * Private Data

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

-struct lpc17_i2cdev_s

-{

-    struct i2c_dev_s    dev;        /* Generic I2C device */

-    struct i2c_msg_s    msg;        /* a single message for legacy read/write */

-    unsigned int        base;       /* Base address of registers */

-    uint16_t            irqid;      /* IRQ for this device */

-

-    sem_t               mutex;      /* Only one thread can access at a time */

-    sem_t               wait;       /* Place to wait for state machine completion */

-    volatile uint8_t    state;      /* State of state machine */

-    WDOG_ID             timeout;    /* watchdog to timeout when bus hung */

-

-    uint16_t            wrcnt;      /* number of bytes sent to tx fifo */

-    uint16_t            rdcnt;      /* number of bytes read from rx fifo */

-};

-

-static struct lpc17_i2cdev_s i2cdevices[3];

-

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

- * Private Functions

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

-static int i2c_start (struct lpc17_i2cdev_s *priv);

-static void i2c_stop (struct lpc17_i2cdev_s *priv);

-static int  i2c_interrupt (int irq, FAR void *context);

-static void i2c_timeout (int argc, uint32_t arg, ...);

-

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

- * I2C device operations

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

-

-static uint32_t i2c_setfrequency(FAR struct i2c_dev_s *dev, uint32_t frequency);

-static int      i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits);

-static int      i2c_write(FAR struct i2c_dev_s *dev, const uint8_t *buffer, int buflen);

-static int      i2c_read(FAR struct i2c_dev_s *dev, uint8_t *buffer, int buflen);

-static int      i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs, int count);

-

-struct i2c_ops_s lpc17_i2c_ops =

-{

-    .setfrequency = i2c_setfrequency,

-    .setaddress   = i2c_setaddress,

-    .write        = i2c_write,

-    .read         = i2c_read,

-#ifdef CONFIG_I2C_TRANSFER

-    .transfer     = i2c_transfer

-#endif

-};

-

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

- * Name: lpc17_i2c_setfrequency

- *

- * Description:

- *   Set the frequence for the next transfer

- *

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

-

-static uint32_t i2c_setfrequency(FAR struct i2c_dev_s *dev, uint32_t frequency)

-{

-    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;

-

-    if (frequency > 100000)

-    {

-        /* asymetric per 400Khz I2C spec */

-        putreg32 ( LPC17_CCLK / (83 + 47) * 47 / frequency, priv->base + LPC17_I2C_SCLH_OFFSET);

-        putreg32 ( LPC17_CCLK / (83 + 47) * 83 / frequency, priv->base + LPC17_I2C_SCLL_OFFSET);

-    }

-    else

-    {

-        /* 50/50 mark space ratio */

-        putreg32 (LPC17_CCLK / 100 * 50 / frequency, priv->base + LPC17_I2C_SCLH_OFFSET);

-        putreg32 (LPC17_CCLK / 100 * 50 / frequency, priv->base + LPC17_I2C_SCLL_OFFSET);

-    }

-

-    /* FIXME: This function should return the actual selected frequency */

-    return frequency;

-}

-

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

- * Name: lpc17_i2c_setaddress

- *

- * Description:

- *   Set the I2C slave address for a subsequent read/write

- *

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

-static int i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits)

-{

-    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;

-

-    DEBUGASSERT(dev != NULL);

-    DEBUGASSERT(nbits == 7 );

-

-    priv->msg.addr  = addr<<1;

-    priv->msg.flags = 0 ;

-

-    return OK;

-}

-

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

- * Name: lpc17_i2c_write

- *

- * Description:

- *   Send a block of data on I2C using the previously selected I2C

- *   frequency and slave address.

- *

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

-static int i2c_write(FAR struct i2c_dev_s *dev, const uint8_t *buffer, int buflen)

-{

-    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;

-    int ret;

-

-    DEBUGASSERT (dev != NULL);

-

-	priv->wrcnt=0;

-	priv->rdcnt=0;

-    priv->msg.addr &= ~0x01;

-    priv->msg.buffer = (uint8_t*)buffer;

-    priv->msg.length = buflen;

-	

-    ret = i2c_start (priv);

-

-    return ret >0 ? OK : -ETIMEDOUT;

-}

-

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

- * Name: lpc17_i2c_read

- *

- * Description:

- *   Receive a block of data on I2C using the previously selected I2C

- *   frequency and slave address.

- *

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

-static int i2c_read(FAR struct i2c_dev_s *dev, uint8_t *buffer, int buflen)

-{

-    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;

-    int ret;

-

-    DEBUGASSERT (dev != NULL);

-

-	priv->wrcnt=0;

-	priv->rdcnt=0;

-    priv->msg.addr |= 0x01;

-    priv->msg.buffer = buffer;

-    priv->msg.length = buflen;

-

-    ret = i2c_start (priv);

-

-    return ret >0 ? OK : -ETIMEDOUT;

-}

-

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

- * Name: i2c_start

- *

- * Description:

- *   Perform a I2C transfer start

- *

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

-static int i2c_start (struct lpc17_i2cdev_s *priv)

-{

-	int ret=-1;

-	sem_wait (&priv->mutex);

-

-    putreg32(I2C_CONCLR_STAC|I2C_CONCLR_SIC,priv->base+LPC17_I2C_CONCLR_OFFSET);

-    putreg32(I2C_CONSET_STA,priv->base+LPC17_I2C_CONSET_OFFSET);

-

-	wd_start (priv->timeout, I2C_TIMEOUT, i2c_timeout, 1, (uint32_t)priv);

-	sem_wait(&priv->wait);

-	wd_cancel (priv->timeout);

-	sem_post (&priv->mutex);

-

-	if( priv-> state == 0x18 || priv->state == 0x28)

-		ret=priv->wrcnt;

-	else if( priv-> state == 0x50 || priv->state == 0x58)

-		ret=priv->rdcnt;

-	return ret;

-} 

-

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

- * Name: i2c_stop

- *

- * Description:

- *   Perform a I2C transfer stop

- *

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

-static void i2c_stop (struct lpc17_i2cdev_s *priv)

-{

-	if(priv->state!=0x38)

-		putreg32(I2C_CONSET_STO|I2C_CONSET_AA,priv->base+LPC17_I2C_CONSET_OFFSET);

-	sem_post (&priv->wait);

-}

-

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

- * Name: i2c_timeout

- *

- * Description:

- *   Watchdog timer for timeout of I2C operation

- *

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

-

-static void i2c_timeout (int argc, uint32_t arg, ...)

-{

-    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) arg;

-

-    irqstate_t flags = irqsave();

-    priv->state = 0xff;

-    sem_post (&priv->wait);

-    irqrestore (flags);

-}

-

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

- * Name: i2c_interrupt

- *

- * Description:

- *   The I2C Interrupt Handler

- *

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

-

-static int i2c_interrupt (int irq, FAR void *context)

-{

-	struct lpc17_i2cdev_s *priv;

-#ifdef CONFIG_LPC17_I2C0

-    if (irq == LPC17_IRQ_I2C0)

-    {

-        priv=&i2cdevices[0];

-    }

-    else

-#endif

-#ifdef CONFIG_LPC17_I2C1

-    if (irq == LPC17_IRQ_I2C1)

-    {

-        priv=&i2cdevices[1];

-    }

-    else

-#endif

-#ifdef CONFIG_LPC17_I2C2

-    if (irq == LPC17_IRQ_I2C2)

-    {

-        priv=&i2cdevices[2];

-    }

-  else

-#endif

-    {

-      PANIC(OSERR_INTERNAL);

-    }

-/*

- * refrence UM10360 19.10.5

- */    

-	uint32_t state = getreg32(priv->base+LPC17_I2C_STAT_OFFSET);

-	putreg32(I2C_CONCLR_SIC,priv->base+LPC17_I2C_CONCLR_OFFSET);

-	priv->state=state;

-	state &=0xf8;

-	switch (state)

-	{

-		case 0x00:      //Bus Error

-		case 0x20:     

-		case 0x30:

-		case 0x38:

-		case 0x48:

-			i2c_stop(priv);

-			break;

-		case 0x08:     //START 

-		case 0x10:     //Repeat START 

-			putreg32(priv->msg.addr,priv->base+LPC17_I2C_DAT_OFFSET);

-			putreg32(I2C_CONCLR_STAC,priv->base+LPC17_I2C_CONCLR_OFFSET);

-			break;

-		case 0x18:

-			priv->wrcnt=0;

-			putreg32(priv->msg.buffer[0],priv->base+LPC17_I2C_DAT_OFFSET);

-		    break; 

-		case 0x28:

-			priv->wrcnt++;

-			if(priv->wrcnt<priv->msg.length)

-				putreg32(priv->msg.buffer[priv->wrcnt],priv->base+LPC17_I2C_DAT_OFFSET);

-		    else

-				i2c_stop(priv);

-		    break;

-		case 0x40:

-			priv->rdcnt=-1;

-			putreg32(I2C_CONSET_AA,priv->base+LPC17_I2C_CONSET_OFFSET);

-			break;

-		case 0x50:

-			priv->rdcnt++;

-			if(priv->rdcnt<priv->msg.length)

-				priv->msg.buffer[priv->rdcnt]=getreg32(priv->base+LPC17_I2C_BUFR_OFFSET);

-			if(priv->rdcnt>=priv->msg.length-1)

-				putreg32(I2C_CONCLR_AAC|I2C_CONCLR_SIC,priv->base+LPC17_I2C_CONCLR_OFFSET);

-			break;

-		case 0x58:

-			i2c_stop(priv);

-			break;

-		default:

-			i2c_stop(priv);

-			break;

-	}

-    return OK;

-}

-

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

- * Public Functions

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

-

-

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

- * Name: up_i2cinitialize

- *

- * Description:

- *   Initialise an I2C device

- *

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

-

-struct i2c_dev_s *up_i2cinitialize(int port)

-{

-    struct lpc17_i2cdev_s *priv;

-

-    if (port>2)

-    {

-        dbg("lpc I2C Only support 0,1,2\n");

-        return NULL;

-    }

-

-    irqstate_t flags;

-    uint32_t regval;

-

-    flags = irqsave();

-

-    priv= &i2cdevices[port];

-#ifdef CONFIG_LPC17_I2C0

-    if (port==0)

-    {

-        priv= (FAR struct lpc17_i2cdev_s *)&i2cdevices[0];

-        priv->base  = LPC17_I2C0_BASE;

-        priv->irqid = LPC17_IRQ_I2C0;

-

-        regval  = getreg32(LPC17_SYSCON_PCONP);

-        regval |= SYSCON_PCONP_PCI2C0;

-        putreg32(regval, LPC17_SYSCON_PCONP);

-

-        regval  = getreg32(LPC17_SYSCON_PCLKSEL0);

-        regval &= ~SYSCON_PCLKSEL0_I2C0_MASK;

-        regval |= (SYSCON_PCLKSEL_CCLK << SYSCON_PCLKSEL0_I2C0_SHIFT);

-        putreg32(regval, LPC17_SYSCON_PCLKSEL0);

-        

-        lpc17_configgpio(GPIO_I2C0_SCL);

-        lpc17_configgpio(GPIO_I2C0_SDA);

-        

-        putreg32 (LPC17_CCLK/CONFIG_I2C0_FREQ/2, priv->base + LPC17_I2C_SCLH_OFFSET);

-        putreg32 (LPC17_CCLK/CONFIG_I2C0_FREQ/2, priv->base + LPC17_I2C_SCLL_OFFSET);

-

-    }

-    else

-#endif

-#ifdef CONFIG_LPC17_I2C1

-    if(port==1)

-    {

-        priv= (FAR struct lpc17_i2cdev_s *)&i2cdevices[1];

-        priv->base  = LPC17_I2C1_BASE;

-        priv->irqid = LPC17_IRQ_I2C1;

-

-        regval  = getreg32(LPC17_SYSCON_PCONP);

-        regval |= SYSCON_PCONP_PCI2C1;

-        putreg32(regval, LPC17_SYSCON_PCONP);

-

-        regval  = getreg32(LPC17_SYSCON_PCLKSEL1);

-        regval &= ~SYSCON_PCLKSEL1_I2C1_MASK;

-        regval |= (SYSCON_PCLKSEL_CCLK << SYSCON_PCLKSEL1_I2C1_SHIFT);

-        putreg32(regval, LPC17_SYSCON_PCLKSEL1);

-

-        lpc17_configgpio(GPIO_I2C1_SCL);

-        lpc17_configgpio(GPIO_I2C1_SDA);

-

-        putreg32 (LPC17_CCLK/CONFIG_I2C1_FREQ/2, priv->base + LPC17_I2C_SCLH_OFFSET);

-        putreg32 (LPC17_CCLK/CONFIG_I2C1_FREQ/2, priv->base + LPC17_I2C_SCLL_OFFSET);

-    }

-    else

-#endif

-#ifdef CONFIG_LPC17_I2C2

-    if(port==2)

-    {

-        priv= (FAR struct lpc17_i2cdev_s *)&i2cdevices[2];

-        priv->base  = LPC17_I2C2_BASE;

-        priv->irqid = LPC17_IRQ_I2C2;

-

-        regval  = getreg32(LPC17_SYSCON_PCONP);

-        regval |= SYSCON_PCONP_PCI2C2;

-        putreg32(regval, LPC17_SYSCON_PCONP);

-

-        regval  = getreg32(LPC17_SYSCON_PCLKSEL1);

-        regval &= ~SYSCON_PCLKSEL1_I2C2_MASK;

-        regval |= (SYSCON_PCLKSEL_CCLK << SYSCON_PCLKSEL1_I2C2_SHIFT);

-        putreg32(regval, LPC17_SYSCON_PCLKSEL1);

-        

-        lpc17_configgpio(GPIO_I2C2_SCL);

-        lpc17_configgpio(GPIO_I2C2_SDA);

-        

-        putreg32 (LPC17_CCLK/CONFIG_I2C2_FREQ/2, priv->base + LPC17_I2C_SCLH_OFFSET);

-        putreg32 (LPC17_CCLK/CONFIG_I2C2_FREQ/2, priv->base + LPC17_I2C_SCLL_OFFSET);

-    }

-    else

-#endif

-    {

-        return NULL;

-    }

-    putreg32(I2C_CONSET_I2EN,priv->base+LPC17_I2C_CONSET_OFFSET);

-

-    sem_init (&priv->mutex, 0, 1);

-    sem_init (&priv->wait, 0, 0);

-

-    /* Allocate a watchdog timer */

-    priv->timeout = wd_create();

-

-    DEBUGASSERT(priv->timeout != 0);

-

-    /* Attach Interrupt Handler */

-    irq_attach (priv->irqid, i2c_interrupt);

-

-    /* Enable Interrupt Handler */

-    up_enable_irq(priv->irqid);

-

-    /* Install our operations */

-    priv->dev.ops = &lpc17_i2c_ops;

-

-    return &priv->dev;

-}

-

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

- * Name: up_i2cuninitalize

- *

- * Description:

- *   Uninitialise an I2C device

- *

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

-

-int up_i2cuninitialize(FAR struct i2c_dev_s * dev)

-{

-	struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;

-	

-	putreg32(I2C_CONCLRT_I2ENC,priv->base+LPC17_I2C_CONCLR_OFFSET);

-    up_disable_irq(priv->irqid);

-    irq_detach (priv->irqid);

-    return OK;

-}

-

-#endif

+/*******************************************************************************
+ * arch/arm/src/lpc17xx/lpc17_i2c.c
+ *
+ *   Copyright (C) 2011 Li Zhuoyi. All rights reserved.
+ *   Author: Li Zhuoyi <lzyy.cn@gmail.com>
+ *   History: 0.1 2011-08-20 initial version
+ * 
+ * Derived from arch/arm/src/lpc31xx/lpc31_i2c.c
+ *
+ *   Author: David Hewson
+ *
+ *   Copyright (C) 2010-2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+
+/*******************************************************************************
+ * Included Files
+ *******************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/i2c.h>
+
+#include <arch/irq.h>
+#include <arch/board/board.h>
+
+#include "wdog.h"
+#include "chip.h"
+#include "up_arch.h"
+#include "up_internal.h"
+#include "os_internal.h"
+
+
+#include "lpc17_internal.h"
+#include "lpc17_syscon.h"
+#include "lpc17_pinconn.h"
+#include "lpc17_i2c.h"
+
+#if defined(CONFIG_LPC17_I2C0) || defined(CONFIG_LPC17_I2C1) || defined(CONFIG_LPC17_I2C2)
+
+#ifndef GPIO_I2C1_SCL
+ #define GPIO_I2C1_SCL GPIO_I2C1_SCL_1
+ #define GPIO_I2C1_SDA GPIO_I2C1_SDA_1
+#endif
+#ifndef CONFIG_I2C0_FREQ
+ #define CONFIG_I2C0_FREQ 100000
+#endif
+#ifndef CONFIG_I2C1_FREQ
+ #define CONFIG_I2C1_FREQ 100000
+#endif
+#ifndef CONFIG_I2C2_FREQ
+ #define CONFIG_I2C2_FREQ 100000
+#endif
+
+/*******************************************************************************
+ * Definitions
+ *******************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define I2C_TIMEOUT     ((20 * CLK_TCK) / 1000) /* 20 mS */
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+struct lpc17_i2cdev_s
+{
+    struct i2c_dev_s    dev;        /* Generic I2C device */
+    struct i2c_msg_s    msg;        /* a single message for legacy read/write */
+    unsigned int        base;       /* Base address of registers */
+    uint16_t            irqid;      /* IRQ for this device */
+
+    sem_t               mutex;      /* Only one thread can access at a time */
+    sem_t               wait;       /* Place to wait for state machine completion */
+    volatile uint8_t    state;      /* State of state machine */
+    WDOG_ID             timeout;    /* watchdog to timeout when bus hung */
+
+    uint16_t            wrcnt;      /* number of bytes sent to tx fifo */
+    uint16_t            rdcnt;      /* number of bytes read from rx fifo */
+};
+
+static struct lpc17_i2cdev_s i2cdevices[3];
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+static int i2c_start (struct lpc17_i2cdev_s *priv);
+static void i2c_stop (struct lpc17_i2cdev_s *priv);
+static int  i2c_interrupt (int irq, FAR void *context);
+static void i2c_timeout (int argc, uint32_t arg, ...);
+
+/****************************************************************************
+ * I2C device operations
+ ****************************************************************************/
+
+static uint32_t i2c_setfrequency(FAR struct i2c_dev_s *dev, uint32_t frequency);
+static int      i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits);
+static int      i2c_write(FAR struct i2c_dev_s *dev, const uint8_t *buffer, int buflen);
+static int      i2c_read(FAR struct i2c_dev_s *dev, uint8_t *buffer, int buflen);
+static int      i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs, int count);
+
+struct i2c_ops_s lpc17_i2c_ops =
+{
+    .setfrequency = i2c_setfrequency,
+    .setaddress   = i2c_setaddress,
+    .write        = i2c_write,
+    .read         = i2c_read,
+#ifdef CONFIG_I2C_TRANSFER
+    .transfer     = i2c_transfer
+#endif
+};
+
+/*******************************************************************************
+ * Name: lpc17_i2c_setfrequency
+ *
+ * Description:
+ *   Set the frequence for the next transfer
+ *
+ *******************************************************************************/
+
+static uint32_t i2c_setfrequency(FAR struct i2c_dev_s *dev, uint32_t frequency)
+{
+    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;
+
+    if (frequency > 100000)
+    {
+        /* asymetric per 400Khz I2C spec */
+        putreg32 ( LPC17_CCLK / (83 + 47) * 47 / frequency, priv->base + LPC17_I2C_SCLH_OFFSET);
+        putreg32 ( LPC17_CCLK / (83 + 47) * 83 / frequency, priv->base + LPC17_I2C_SCLL_OFFSET);
+    }
+    else
+    {
+        /* 50/50 mark space ratio */
+        putreg32 (LPC17_CCLK / 100 * 50 / frequency, priv->base + LPC17_I2C_SCLH_OFFSET);
+        putreg32 (LPC17_CCLK / 100 * 50 / frequency, priv->base + LPC17_I2C_SCLL_OFFSET);
+    }
+
+    /* FIXME: This function should return the actual selected frequency */
+    return frequency;
+}
+
+/*******************************************************************************
+ * Name: lpc17_i2c_setaddress
+ *
+ * Description:
+ *   Set the I2C slave address for a subsequent read/write
+ *
+ *******************************************************************************/
+static int i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits)
+{
+    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;
+
+    DEBUGASSERT(dev != NULL);
+    DEBUGASSERT(nbits == 7 );
+
+    priv->msg.addr  = addr<<1;
+    priv->msg.flags = 0 ;
+
+    return OK;
+}
+
+/*******************************************************************************
+ * Name: lpc17_i2c_write
+ *
+ * Description:
+ *   Send a block of data on I2C using the previously selected I2C
+ *   frequency and slave address.
+ *
+ *******************************************************************************/
+static int i2c_write(FAR struct i2c_dev_s *dev, const uint8_t *buffer, int buflen)
+{
+    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;
+    int ret;
+
+    DEBUGASSERT (dev != NULL);
+
+	priv->wrcnt=0;
+	priv->rdcnt=0;
+    priv->msg.addr &= ~0x01;
+    priv->msg.buffer = (uint8_t*)buffer;
+    priv->msg.length = buflen;
+	
+    ret = i2c_start (priv);
+
+    return ret >0 ? OK : -ETIMEDOUT;
+}
+
+/*******************************************************************************
+ * Name: lpc17_i2c_read
+ *
+ * Description:
+ *   Receive a block of data on I2C using the previously selected I2C
+ *   frequency and slave address.
+ *
+ *******************************************************************************/
+static int i2c_read(FAR struct i2c_dev_s *dev, uint8_t *buffer, int buflen)
+{
+    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;
+    int ret;
+
+    DEBUGASSERT (dev != NULL);
+
+	priv->wrcnt=0;
+	priv->rdcnt=0;
+    priv->msg.addr |= 0x01;
+    priv->msg.buffer = buffer;
+    priv->msg.length = buflen;
+
+    ret = i2c_start (priv);
+
+    return ret >0 ? OK : -ETIMEDOUT;
+}
+
+/*******************************************************************************
+ * Name: i2c_start
+ *
+ * Description:
+ *   Perform a I2C transfer start
+ *
+ *******************************************************************************/
+static int i2c_start (struct lpc17_i2cdev_s *priv)
+{
+	int ret=-1;
+	sem_wait (&priv->mutex);
+
+    putreg32(I2C_CONCLR_STAC|I2C_CONCLR_SIC,priv->base+LPC17_I2C_CONCLR_OFFSET);
+    putreg32(I2C_CONSET_STA,priv->base+LPC17_I2C_CONSET_OFFSET);
+
+	wd_start (priv->timeout, I2C_TIMEOUT, i2c_timeout, 1, (uint32_t)priv);
+	sem_wait(&priv->wait);
+	wd_cancel (priv->timeout);
+	sem_post (&priv->mutex);
+
+	if( priv-> state == 0x18 || priv->state == 0x28)
+		ret=priv->wrcnt;
+	else if( priv-> state == 0x50 || priv->state == 0x58)
+		ret=priv->rdcnt;
+	return ret;
+} 
+
+/*******************************************************************************
+ * Name: i2c_stop
+ *
+ * Description:
+ *   Perform a I2C transfer stop
+ *
+ *******************************************************************************/
+static void i2c_stop (struct lpc17_i2cdev_s *priv)
+{
+	if(priv->state!=0x38)
+		putreg32(I2C_CONSET_STO|I2C_CONSET_AA,priv->base+LPC17_I2C_CONSET_OFFSET);
+	sem_post (&priv->wait);
+}
+
+/*******************************************************************************
+ * Name: i2c_timeout
+ *
+ * Description:
+ *   Watchdog timer for timeout of I2C operation
+ *
+ *******************************************************************************/
+
+static void i2c_timeout (int argc, uint32_t arg, ...)
+{
+    struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) arg;
+
+    irqstate_t flags = irqsave();
+    priv->state = 0xff;
+    sem_post (&priv->wait);
+    irqrestore (flags);
+}
+
+/*******************************************************************************
+ * Name: i2c_interrupt
+ *
+ * Description:
+ *   The I2C Interrupt Handler
+ *
+ *******************************************************************************/
+
+static int i2c_interrupt (int irq, FAR void *context)
+{
+	struct lpc17_i2cdev_s *priv;
+#ifdef CONFIG_LPC17_I2C0
+    if (irq == LPC17_IRQ_I2C0)
+    {
+        priv=&i2cdevices[0];
+    }
+    else
+#endif
+#ifdef CONFIG_LPC17_I2C1
+    if (irq == LPC17_IRQ_I2C1)
+    {
+        priv=&i2cdevices[1];
+    }
+    else
+#endif
+#ifdef CONFIG_LPC17_I2C2
+    if (irq == LPC17_IRQ_I2C2)
+    {
+        priv=&i2cdevices[2];
+    }
+  else
+#endif
+    {
+      PANIC(OSERR_INTERNAL);
+    }
+/*
+ * refrence UM10360 19.10.5
+ */    
+	uint32_t state = getreg32(priv->base+LPC17_I2C_STAT_OFFSET);
+	putreg32(I2C_CONCLR_SIC,priv->base+LPC17_I2C_CONCLR_OFFSET);
+	priv->state=state;
+	state &=0xf8;
+	switch (state)
+	{
+		case 0x00:      //Bus Error
+		case 0x20:     
+		case 0x30:
+		case 0x38:
+		case 0x48:
+			i2c_stop(priv);
+			break;
+		case 0x08:     //START 
+		case 0x10:     //Repeat START 
+			putreg32(priv->msg.addr,priv->base+LPC17_I2C_DAT_OFFSET);
+			putreg32(I2C_CONCLR_STAC,priv->base+LPC17_I2C_CONCLR_OFFSET);
+			break;
+		case 0x18:
+			priv->wrcnt=0;
+			putreg32(priv->msg.buffer[0],priv->base+LPC17_I2C_DAT_OFFSET);
+		    break; 
+		case 0x28:
+			priv->wrcnt++;
+			if(priv->wrcnt<priv->msg.length)
+				putreg32(priv->msg.buffer[priv->wrcnt],priv->base+LPC17_I2C_DAT_OFFSET);
+		    else
+				i2c_stop(priv);
+		    break;
+		case 0x40:
+			priv->rdcnt=-1;
+			putreg32(I2C_CONSET_AA,priv->base+LPC17_I2C_CONSET_OFFSET);
+			break;
+		case 0x50:
+			priv->rdcnt++;
+			if(priv->rdcnt<priv->msg.length)
+				priv->msg.buffer[priv->rdcnt]=getreg32(priv->base+LPC17_I2C_BUFR_OFFSET);
+			if(priv->rdcnt>=priv->msg.length-1)
+				putreg32(I2C_CONCLR_AAC|I2C_CONCLR_SIC,priv->base+LPC17_I2C_CONCLR_OFFSET);
+			break;
+		case 0x58:
+			i2c_stop(priv);
+			break;
+		default:
+			i2c_stop(priv);
+			break;
+	}
+    return OK;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+
+/*******************************************************************************
+ * Name: up_i2cinitialize
+ *
+ * Description:
+ *   Initialise an I2C device
+ *
+ *******************************************************************************/
+
+struct i2c_dev_s *up_i2cinitialize(int port)
+{
+    struct lpc17_i2cdev_s *priv;
+
+    if (port>2)
+    {
+        dbg("lpc I2C Only support 0,1,2\n");
+        return NULL;
+    }
+
+    irqstate_t flags;
+    uint32_t regval;
+
+    flags = irqsave();
+
+    priv= &i2cdevices[port];
+#ifdef CONFIG_LPC17_I2C0
+    if (port==0)
+    {
+        priv= (FAR struct lpc17_i2cdev_s *)&i2cdevices[0];
+        priv->base  = LPC17_I2C0_BASE;
+        priv->irqid = LPC17_IRQ_I2C0;
+
+        regval  = getreg32(LPC17_SYSCON_PCONP);
+        regval |= SYSCON_PCONP_PCI2C0;
+        putreg32(regval, LPC17_SYSCON_PCONP);
+
+        regval  = getreg32(LPC17_SYSCON_PCLKSEL0);
+        regval &= ~SYSCON_PCLKSEL0_I2C0_MASK;
+        regval |= (SYSCON_PCLKSEL_CCLK << SYSCON_PCLKSEL0_I2C0_SHIFT);
+        putreg32(regval, LPC17_SYSCON_PCLKSEL0);
+        
+        lpc17_configgpio(GPIO_I2C0_SCL);
+        lpc17_configgpio(GPIO_I2C0_SDA);
+        
+        putreg32 (LPC17_CCLK/CONFIG_I2C0_FREQ/2, priv->base + LPC17_I2C_SCLH_OFFSET);
+        putreg32 (LPC17_CCLK/CONFIG_I2C0_FREQ/2, priv->base + LPC17_I2C_SCLL_OFFSET);
+
+    }
+    else
+#endif
+#ifdef CONFIG_LPC17_I2C1
+    if(port==1)
+    {
+        priv= (FAR struct lpc17_i2cdev_s *)&i2cdevices[1];
+        priv->base  = LPC17_I2C1_BASE;
+        priv->irqid = LPC17_IRQ_I2C1;
+
+        regval  = getreg32(LPC17_SYSCON_PCONP);
+        regval |= SYSCON_PCONP_PCI2C1;
+        putreg32(regval, LPC17_SYSCON_PCONP);
+
+        regval  = getreg32(LPC17_SYSCON_PCLKSEL1);
+        regval &= ~SYSCON_PCLKSEL1_I2C1_MASK;
+        regval |= (SYSCON_PCLKSEL_CCLK << SYSCON_PCLKSEL1_I2C1_SHIFT);
+        putreg32(regval, LPC17_SYSCON_PCLKSEL1);
+
+        lpc17_configgpio(GPIO_I2C1_SCL);
+        lpc17_configgpio(GPIO_I2C1_SDA);
+
+        putreg32 (LPC17_CCLK/CONFIG_I2C1_FREQ/2, priv->base + LPC17_I2C_SCLH_OFFSET);
+        putreg32 (LPC17_CCLK/CONFIG_I2C1_FREQ/2, priv->base + LPC17_I2C_SCLL_OFFSET);
+    }
+    else
+#endif
+#ifdef CONFIG_LPC17_I2C2
+    if(port==2)
+    {
+        priv= (FAR struct lpc17_i2cdev_s *)&i2cdevices[2];
+        priv->base  = LPC17_I2C2_BASE;
+        priv->irqid = LPC17_IRQ_I2C2;
+
+        regval  = getreg32(LPC17_SYSCON_PCONP);
+        regval |= SYSCON_PCONP_PCI2C2;
+        putreg32(regval, LPC17_SYSCON_PCONP);
+
+        regval  = getreg32(LPC17_SYSCON_PCLKSEL1);
+        regval &= ~SYSCON_PCLKSEL1_I2C2_MASK;
+        regval |= (SYSCON_PCLKSEL_CCLK << SYSCON_PCLKSEL1_I2C2_SHIFT);
+        putreg32(regval, LPC17_SYSCON_PCLKSEL1);
+        
+        lpc17_configgpio(GPIO_I2C2_SCL);
+        lpc17_configgpio(GPIO_I2C2_SDA);
+        
+        putreg32 (LPC17_CCLK/CONFIG_I2C2_FREQ/2, priv->base + LPC17_I2C_SCLH_OFFSET);
+        putreg32 (LPC17_CCLK/CONFIG_I2C2_FREQ/2, priv->base + LPC17_I2C_SCLL_OFFSET);
+    }
+    else
+#endif
+    {
+        return NULL;
+    }
+    putreg32(I2C_CONSET_I2EN,priv->base+LPC17_I2C_CONSET_OFFSET);
+
+    sem_init (&priv->mutex, 0, 1);
+    sem_init (&priv->wait, 0, 0);
+
+    /* Allocate a watchdog timer */
+    priv->timeout = wd_create();
+
+    DEBUGASSERT(priv->timeout != 0);
+
+    /* Attach Interrupt Handler */
+    irq_attach (priv->irqid, i2c_interrupt);
+
+    /* Enable Interrupt Handler */
+    up_enable_irq(priv->irqid);
+
+    /* Install our operations */
+    priv->dev.ops = &lpc17_i2c_ops;
+
+    return &priv->dev;
+}
+
+/*******************************************************************************
+ * Name: up_i2cuninitalize
+ *
+ * Description:
+ *   Uninitialise an I2C device
+ *
+ *******************************************************************************/
+
+int up_i2cuninitialize(FAR struct i2c_dev_s * dev)
+{
+	struct lpc17_i2cdev_s *priv = (struct lpc17_i2cdev_s *) dev;
+	
+	putreg32(I2C_CONCLRT_I2ENC,priv->base+LPC17_I2C_CONCLR_OFFSET);
+    up_disable_irq(priv->irqid);
+    irq_detach (priv->irqid);
+    return OK;
+}
+
+#endif