Subversion Repositories openrisc

//*****************************************************************************

//

// hw_i2c.h - Macros used when accessing the I2C master and slave hardware.

//

// Copyright (c) 2005,2006 Luminary Micro, Inc.  All rights reserved.

//

// Software License Agreement

//

// Luminary Micro, Inc. (LMI) is supplying this software for use solely and

// exclusively on LMI's Stellaris Family of microcontroller products.

//

// The software is owned by LMI and/or its suppliers, and is protected under

// applicable copyright laws.  All rights are reserved.  Any use in violation

// of the foregoing restrictions may subject the user to criminal sanctions

// under applicable laws, as well as to civil liability for the breach of the

// terms and conditions of this license.

//

// THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED

// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF

// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.

// LMI SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR

// CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.

//

// This is part of revision 523 of the Stellaris Driver Library.

//

//*****************************************************************************

#ifndef __HW_I2C_H__

#define __HW_I2C_H__

//*****************************************************************************

//

// The following define the offsets of the I2C master registers.

//

//*****************************************************************************

#define I2C_MASTER_O_SA         0x00000000  // Slave address register

#define I2C_MASTER_O_CS         0x00000004  // Control and Status register

#define I2C_MASTER_O_DR         0x00000008  // Data register

#define I2C_MASTER_O_TPR        0x0000000C  // Timer period register

#define I2C_MASTER_O_IMR        0x00000010  // Interrupt mask register

#define I2C_MASTER_O_RIS        0x00000014  // Raw interrupt status register

#define I2C_MASTER_O_MIS        0x00000018  // Masked interrupt status reg

#define I2C_MASTER_O_ICR        0x0000001c  // Interrupt clear register

#define I2C_MASTER_O_CR         0x00000020  // Configuration register

//*****************************************************************************

//

// The following define the offsets of the I2C slave registers.

//

//*****************************************************************************

#define I2C_SLAVE_O_OAR         0x00000000  // Own address register

#define I2C_SLAVE_O_CSR         0x00000004  // Control/Status register

#define I2C_SLAVE_O_DR          0x00000008  // Data register

#define I2C_SLAVE_O_IM          0x0000000C  // Interrupt mask register

#define I2C_SLAVE_O_RIS         0x00000010  // Raw interrupt status register

#define I2C_SLAVE_O_MIS         0x00000014  // Masked interrupt status reg

#define I2C_SLAVE_O_ICR         0x00000018  // Interrupt clear register

//*****************************************************************************

//

// The following define the bit fields in the I2C Master Control and Status

// register.

//

//*****************************************************************************

#define I2C_MASTER_CS_ACK       0x00000008  // Acknowlegde

#define I2C_MASTER_CS_STOP      0x00000004  // Stop

#define I2C_MASTER_CS_START     0x00000002  // Start

#define I2C_MASTER_CS_RUN       0x00000001  // Run

#define I2C_MASTER_CS_BUS_BUSY  0x00000040  // Bus busy

#define I2C_MASTER_CS_IDLE      0x00000020  // Idle

#define I2C_MASTER_CS_ARB_LOST  0x00000010  // Lost arbitration

#define I2C_MASTER_CS_DATA_ACK  0x00000008  // Data byte not acknowledged

#define I2C_MASTER_CS_ADDR_ACK  0x00000004  // Address byte not acknowledged

#define I2C_MASTER_CS_ERROR     0x00000002  // Error occurred

#define I2C_MASTER_CS_BUSY      0x00000001  // Controller is TX/RX data

#define I2C_MASTER_CS_ERR_MASK  0x0000001C

//*****************************************************************************

//

// The following define values used in determining the contents of the I2C

// Master Timer Period register.

//

//*****************************************************************************

#define I2C_MASTER_TPR_SCL_HP   0x00000004  // SCL high period

#define I2C_MASTER_TPR_SCL_LP   0x00000006  // SCL low period

#define I2C_SCL_STANDARD        100000      // SCL standard frequency

#define I2C_SCL_FAST            400000      // SCL fast frequency

//*****************************************************************************

//

// The following define the bit fields in the I2C Master Interrupt Mask

// register.

//

//*****************************************************************************

#define I2C_MASTER_IMR_IM       0x00000001  // Master interrupt mask

//*****************************************************************************

//

// The following define the bit fields in the I2C Master Raw Interrupt Status

// register.

//

//*****************************************************************************

#define I2C_MASTER_RIS_RIS      0x00000001  // Master raw interrupt status

//*****************************************************************************

//

// The following define the bit fields in the I2C Master Masked Interrupt

// Status register.

//

//*****************************************************************************

#define I2C_MASTER_MIS_MIS      0x00000001  // Master masked interrupt status

//*****************************************************************************

//

// The following define the bit fields in the I2C Master Configuration

// register.

//

//*****************************************************************************

#define I2C_MASTER_CR_SFE       0x00000020  // Slave function enable

#define I2C_MASTER_CR_MFE       0x00000010  // Master function enable

#define I2C_MASTER_CR_LPBK      0x00000001  // Loopback enable

//*****************************************************************************

//

// The following define the bit fields in the I2C Slave Control/Status

// register.

//

//*****************************************************************************

#define I2C_SLAVE_CSR_DA        0x00000001  // Enable the device

#define I2C_SLAVE_CSR_TREQ      0x00000002  // Transmit request received

#define I2C_SLAVE_CSR_RREQ      0x00000001  // Receive data from I2C master

//*****************************************************************************

//

// The following define the bit fields in the I2C Slave Interrupt Mask

// register.

//

//*****************************************************************************

#define I2C_SLAVE_IMR_IM       0x00000001  // Slave interrupt mask

//*****************************************************************************

//

// The following define the bit fields in the I2C Slave Raw Interrupt Status

// register.

//

//*****************************************************************************

#define I2C_SLAVE_RIS_RIS      0x00000001  // Slave raw interrupt status

//*****************************************************************************

//

// The following define the bit fields in the I2C Slave Masked Interrupt

// Status register.

//

//*****************************************************************************

#define I2C_SLAVE_MIS_MIS      0x00000001  // Master masked interrupt status

#endif // __HW_I2C_H__