/*===========================================================================    Copyright 2000, 2001 Holley Communications. All rights reserved.*//***************************************************************************** * * DEV_I2C_LOCAL.H - I2C Interface: Local Definitions * * PURPOSE: *    To define local definitions used within the I2C communication *    interface module. *     * HISTORY: *    V 1.00 - Mar 25, 1998 - G.Catt *             Creation *           - May 12, 1998 - G.Catt       *             Standardized symbol naming. *           - Jul 17, 2000 - Yanbing *             Performance improvements of I2C low level functions * * NOTE: *     * *****************************************************************************/#ifndef DEV_I2C_LOCAL_H#define DEV_I2C_LOCAL_H#include "main_system.h"/*--- I2C Signal States ---*//* Data States */#define DEV_I2C_SIGNAL_HIGH      1                  /* High     (driven) */#define DEV_I2C_SIGNAL_LOW       0                  /* Low      (driven) *//* Control States */#define DEV_I2C_SIGNAL_INACTIVE  DEV_I2C_SIGNAL_HIGH    /* Signal floating   */#define DEV_I2C_SIGNAL_ASSERT    DEV_I2C_SIGNAL_LOW     /* Asserted (driven) *//* Data Acknowledgements */#define DEV_I2C_SIGNAL_NOACK     DEV_I2C_SIGNAL_INACTIVE/* No ACK (floating)   */#define DEV_I2C_SIGNAL_ACK       DEV_I2C_SIGNAL_ASSERT  /* ACK    (driven low) *//*********************************************************************** *  Yanbing - The following defines are for I2C low level control. *  It is modified to improve I2C performances. ***********************************************************************/#define MMI_I2C_SCL     13#define MMI_I2C_SDA     14#define DEV_PIO_SetDirection(dir, bit)  { if (dir) REG32(GPIO_BASE+GPIO_DIR) |= BIT(bit); \                                          else REG32(GPIO_BASE+GPIO_DIR) &= ~BIT(bit); }#define DEV_PIO_WRITE_PIO(val, bit)     { if (val) REG32(GPIO_BASE+GPIO_OUT) |= BIT(bit); \                                          else REG32(GPIO_BASE+GPIO_OUT) &= ~BIT(bit); }#define DEV_PIO_READ_PIO(bit)       (REG32(GPIO_BASE+GPIO_PIN) & BIT(bit))#define SET_DIR_SCL(a)              DEV_PIO_SetDirection(a,MMI_I2C_SCL)#define SET_DIR_SDA(a)              DEV_PIO_SetDirection(a,MMI_I2C_SDA)#define WRITE_SCL(a)                DEV_PIO_WRITE_PIO(a,MMI_I2C_SCL)#define WRITE_SDA(a)                DEV_PIO_WRITE_PIO(a,MMI_I2C_SDA)#define READ_SCL()                  DEV_PIO_READ_PIO(MMI_I2C_SCL)#define READ_SDA()                  DEV_PIO_READ_PIO(MMI_I2C_SDA)#define READ_I2C_SLAVE_MUTE()       DEV_PIO_READ_PIO(UIM_SLAVE_I2C_MUTE)#if BOARD_PHOENIX# define dev_i2c_io_scllow()         { DEV_PIO_SetOutput(MMI_I2C_SCL); DEV_PIO_WRITE_LOW(MMI_I2C_SCL); }# define dev_i2c_io_scltristate()    { DEV_PIO_SetInput(MMI_I2C_SCL); }# define dev_i2c_io_sdalow()         { DEV_PIO_SetOutput(MMI_I2C_SDA); DEV_PIO_WRITE_LOW(MMI_I2C_SDA); }# define dev_i2c_io_sdatristate()    { DEV_PIO_SetInput(MMI_I2C_SDA); }#else# define dev_i2c_io_scllow()         { SET_DIR_SCL(PIO_OUTPUT); WRITE_SCL(PIO_LOW); }# define dev_i2c_io_scltristate()    { SET_DIR_SCL(PIO_INPUT); }# define dev_i2c_io_sdalow()         { SET_DIR_SDA(PIO_OUTPUT); WRITE_SDA(PIO_LOW); }# define dev_i2c_io_sdatristate()    { SET_DIR_SDA(PIO_INPUT); }#endif/* Local function prototypes */void dev_i2c_io_initialize ( void );Bool dev_i2c_io_sclstate ( void );Bool dev_i2c_io_sdastate ( void );#endif