/*===========================================================================    Copyright 2000, 2001 Holley Communications. All rights reserved.*//***************************************************************************** * * DEV_I2C_GLOBAL.H - I2C Interface: Global Definitions * * PURPOSE: *    To provide definitions for users of the Inter-IC communication (I2C) *    interface module. *     * HISTORY: * * NOTE: *    All error return codes must be negative numbers. The 'success' code *    must always be zero. *     * *****************************************************************************/#ifndef DEV_I2C_GLOBAL_H#define DEV_I2C_GLOBAL_H#define DEV_I2C_NOT_LAST_BYTE   0#define DEV_I2C_LAST_BYTE       1#define MAX_ALPAR_DATA_LENGTH   261       /* ALPAR information field length */#define UIM_WAKEUP_SLAVE     31#define UIM_SLAVE_I2C_MUTE   10#define UIM_SHUTDOWN         12# define DEV_PIO_SetInput(bit)      REG32(GPIO_BASE+GPIO_DIR) &= ~BIT(bit)# define DEV_PIO_SetOutput(bit)     REG32(GPIO_BASE+GPIO_DIR) |= BIT(bit)# define DEV_PIO_WRITE_HIGH(bit)    REG32(GPIO_BASE+GPIO_OUT) |= BIT(bit)# define DEV_PIO_WRITE_LOW(bit)     REG32(GPIO_BASE+GPIO_OUT) &= ~BIT(bit)/*--- Return Codes ---*/enum dev_i2cereturncodes{   /* Errors */   DEV_I2C_RETCODE_TOOLONG   = -7,      /* Received Data Too Many */   DEV_I2C_RETCODE_NOACK     = -6,      /* No acknowledgement (unspecified) */   DEV_I2C_RETCODE_SCLRLSTO  = -5,      /* Slave SCL release timeout error */   DEV_I2C_RETCODE_IOINITERR = -4,      /* I/O initialization error */   DEV_I2C_RETCODE_NODATAACK = -3,      /* No acknowledgement to data byte */   DEV_I2C_RETCODE_NOADDRACK = -2,      /* No acknowledgement to address byte */   DEV_I2C_RETCODE_BUSBUSY   = -1,      /* Bus is busy */   /* Success */   DEV_I2C_RETCODE_SUCCESS   =  0,      /* No error */   DEV_I2C_NUM_RETCODES      =  7       /* Number of return codes */};/* Global function prototypes */Int16 dev_i2c_initialize ( Long parm );Int16 dev_i2c_write ( Byte deviceaddr, Byte *databufp, Word len );Int16 dev_i2c_Uim_read ( Byte deviceaddr, Byte *databufp );void dev_i2c_wait ( Int16 five_microSec );void dev_uim_wakeup ( void );void dev_uim_reset ( void );Bool dev_slave_i2c_mute_state ( void );#endif