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