Add I2C header file

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1847 42af7a65-404d-4744-a932-0658087f49c3

arch/arm/src/lpc214x/chip.h

@@ -163,13 +163,13 @@
 
 /* I2C register offsets */
 
-#define LPC214X_I2C_ONSET_OFFSET        0x00   /* Control Set Register */
+#define LPC214X_I2C_CONSET_OFFSET       0x00   /* Control Set Register */
 #define LPC214X_I2C_STAT_OFFSET         0x04   /* Status Register */
 #define LPC214X_I2C_DAT_OFFSET          0x08   /* Data Register */
 #define LPC214X_I2C_ADR_OFFSET          0x0c   /* Slave Address Register */
 #define LPC214X_I2C_SCLH_OFFSET         0x10   /* SCL Duty Cycle Register (high half word) */
 #define LPC214X_I2C_SCLL_OFFSET         0x14   /* SCL Duty Cycle Register (low half word) */
-#define LPC214X_I2C_ONCLR_OFFSET        0x18   /* Control Clear Register */
+#define LPC214X_I2C_CONCLR_OFFSET       0x18   /* Control Clear Register */
 
 /* Pin function select register offsets */
 

arch/arm/src/lpc214x/lpc214x_i2c.h

@@ -0,0 +1,141 @@
+/************************************************************************************
+ * arch/arm/src/lpc214x/lpc214x_i2c.h
+ *
+ *   Copyright (C) 2009 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.
+ *
+ ************************************************************************************/
+
+#ifndef _ARCH_ARM_SRC_LPC214X_I2C_H
+#define _ARCH_ARM_SRC_LPC214X_I2C_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include "chip.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/* Register address Offsets *********************************************************/
+
+/* Defined in chip.h */
+
+/* Register Address Definitions *****************************************************/
+
+#define LPC214X_I2C0_CONSET      (LPC214X_I2C0_BASE + LPC214X_I2C_ONSET_OFFSET)
+#define LPC214X_I2C0_STAT        (LPC214X_I2C0_BASE + LPC214X_I2C_STAT_OFFSET)
+#define LPC214X_I2C0_DAT         (LPC214X_I2C0_BASE + LPC214X_I2C_DAT_OFFSET)
+#define LPC214X_I2C0_ADR         (LPC214X_I2C0_BASE + LPC214X_I2C_ADR_OFFSET)
+#define LPC214X_I2C0_SCLH        (LPC214X_I2C0_BASE + LPC214X_I2C_SCLH_OFFSET)
+#define LPC214X_I2C0_SCLL        (LPC214X_I2C0_BASE + LPC214X_I2C_SCLL_OFFSET)
+#define LPC214X_I2C0_CONCLR      (LPC214X_I2C0_BASE + LPC214X_I2C_ONCLR_OFFSET)
+
+#define LPC214X_I2C1_CONSET      (LPC214X_I2C1_BASE + LPC214X_I2C_ONSET_OFFSET)
+#define LPC214X_I2C1_STAT        (LPC214X_I2C1_BASE + LPC214X_I2C_STAT_OFFSET)
+#define LPC214X_I2C1_DAT         (LPC214X_I2C1_BASE + LPC214X_I2C_DAT_OFFSET)
+#define LPC214X_I2C1_ADR         (LPC214X_I2C1_BASE + LPC214X_I2C_ADR_OFFSET)
+#define LPC214X_I2C1_SCLH        (LPC214X_I2C1_BASE + LPC214X_I2C_SCLH_OFFSET)
+#define LPC214X_I2C1_SCLL        (LPC214X_I2C1_BASE + LPC214X_I2C_SCLL_OFFSET)
+#define LPC214X_I2C1_CONCLR      (LPC214X_I2C1_BASE + LPC214X_I2C_ONCLR_OFFSET)
+
+/* I2C register bit definitions *****************************************************/
+
+/* Control Set Register (CONSET) */
+
+#define I2C_CONSET_AA            (1 << 2)  /* Bit 2: Assert acknowledge flag */
+#define I2C_CONSET_SI            (1 << 3)  /* Bit 3: I2C interrrupt flag */
+#define I2C_CONSET_STO           (1 << 4)  /* Bit 4: STOP flag */
+#define I2C_CONSET_STA           (1 << 5)  /* Bit 5: START flag */
+#define I2C_CONSET_I2EN          (1 << 6)  /* Bit 6: I2C interface enable */
+
+/* Control Clear Register (CONCLR) */
+
+#define I2C_CONCLR_AAC           (1 << 2)  /* Bit 2: Assert acknowledge Clear bit */
+#define I2C_CONCLR_SIC           (1 << 3)  /* Bit 3: I2C interrupt Clear bit */
+#define I2C_CONCLR_STAC          (1 << 5)  /* Bit 5: START flag Clear bit */
+#define I2C_CONCLR_I2ENC         (1 << 6)  /* Bit 6: I2C interface Disable bit */
+
+/* Status Register (STAT) */
+
+#define I2C_STAT_SHIFT           (1 << 3)  /* Bits 3-7: Status bits */
+#define I2C_STAT_MASK            (0xff << I2C_STAT_SHIFT)
+
+/* Master transmit mode */
+
+#  define I2C_STAT_MXSTART       (0 << I2C_STAT_SHIFT)  /* Start transmitted */
+#  define I2C_STAT_MXRSTART      (2 << I2C_STAT_SHIFT)  /* Repeated start transmitted */
+#  define I2C_STAT_MXSLAWACK     (3 << I2C_STAT_SHIFT)  /* SLA+W tranmitted + ACK received */
+#  define I2C_STAT_MXSLAWNAK     (4 << I2C_STAT_SHIFT)  /* SLA+W tranmitted + NAK received */
+#  define I2C_STAT_MXDATAACK     (5 << I2C_STAT_SHIFT)  /* Data tranmitted + ACK received */
+#  define I2C_STAT_MXDATANAK     (6 << I2C_STAT_SHIFT)  /* Data tranmitted + NAK received */
+#  define I2C_STAT_MXARBLOST     (7 << I2C_STAT_SHIFT)  /* Abritration lost in SLA+W or data */
+
+/* Master receive mode */
+
+#  define I2C_STAT_MRSTART       (0 << I2C_STAT_SHIFT)  /* Start transmitted */
+#  define I2C_STAT_MRRSTART      (2 << I2C_STAT_SHIFT)  /* Repeated start transmitted */
+#  define I2C_STAT_MRARBLOST     (7 << I2C_STAT_SHIFT)  /* Abritration lost in NAK bit */
+#  define I2C_STAT_MRSLARACK     (8 << I2C_STAT_SHIFT)  /* SLA+R tranmitted + ACK received */
+#  define I2C_STAT_MRSLARNAK     (9 << I2C_STAT_SHIFT)  /* SLA+R tranmitted + NAK received */
+#  define I2C_STAT_MRDATAACK     (10 << I2C_STAT_SHIFT) /* Data received + send ACK */
+#  define I2C_STAT_MRDATANAK     (11 << I2C_STAT_SHIFT) /* Data received + send NAK */
+
+/* Slave receive mode -- to be provided */
+
+/* Slave receive mode -- to be provided */
+
+/* Data Register (DAT) -- 8-bits of data */
+
+/* Slave Address Register (ADR) */
+
+#define I2C_ADR_GCA              (1 << 0)  /* Bit 0: General call enable */
+#define I2C_ADR_SHIFT            1         /* Bits 7-1: address */
+#define I2C_ADR_MASK             (0x7f << I2C_ADR_SHIFT)
+
+/* SCL Duty Cycle Register (high half word - SCLH) - 16-bits of data */
+
+/* SCL Duty Cycle Register (low half word - SCLL) - 16-bits of data */
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Inline Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+
+#endif  /* _ARCH_ARM_SRC_LPC214X_I2C_H */