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/**
* @file
* @ingroup i2c
*/
/*
* COPYRIGHT (c) 2007 Cobham Gaisler AB
* with parts from the RTEMS MPC83xx I2C driver (c) 2007 Embedded Brains GmbH.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef _I2CMST_H
#define _I2CMST_H
/**
* @defgroup i2c I2C-master
*
* @ingroup RTEMSBSPsSharedGRLIB
*
* @brief Driver for GRLIB port of OpenCores I2C-master
*
* @{
*/
#include <rtems/libi2c.h>
#include "ambapp.h"
#ifdef __cplusplus
extern "C" {
#endif
/* I2C-master operational registers */
typedef struct gr_i2cmst_regs {
volatile unsigned int prescl; /* Prescale register */
volatile unsigned int ctrl; /* Control register */
volatile unsigned int tdrd; /* Transmit and Receive registers */
volatile unsigned int cmdsts; /* Command and Status registers */
} gr_i2cmst_regs_t;
/* Control (CTRL) register */
#define GRI2C_CTRL_EN 0x00000080 /* Enable core */
#define GRI2C_CTRL_IEN 0x00000040 /* Interrupt enable */
/* Command (CMD) register */
#define GRI2C_CMD_STA 0x00000080 /* Generate START condition */
#define GRI2C_CMD_STO 0x00000040 /* Generate STOP condition */
#define GRI2C_CMD_RD 0x00000020 /* Read from slave */
#define GRI2C_CMD_WR 0x00000010 /* Write to slave */
#define GRI2C_CMD_ACK 0x00000008 /* Acknowledge */
#define GRI2C_CMD_IACK 0x00000001 /* Interrupt acknowledge */
/* Status (STS) register */
#define GRI2C_STS_RXACK 0x00000080 /* Receive acknowledge */
#define GRI2C_STS_BUSY 0x00000040 /* I2C-bus busy */
#define GRI2C_STS_AL 0x00000020 /* Arbitration lost */
#define GRI2C_STS_TIP 0x00000002 /* Transfer in progress */
#define GRI2C_STS_IF 0x00000001 /* Interrupt flag */
#define GRI2C_STATUS_IDLE 0x00000000
/* Register I2CMST driver to Driver Manager */
void i2cmst_register_drv (void);
#ifdef __cplusplus
}
#endif
/** @} */
#endif /* _I2CMST_H */
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