i2cgpio.h

来自「WinCE 3.0 BSP, 包含Inter SA1110, Intel_815」· C头文件 代码 · 共 101 行

//==========================================================================;
//
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
//  PURPOSE.
//
//  Copyright (c) 1996 - 1997  Microsoft Corporation.  All Rights Reserved.
//
//==========================================================================;

#ifndef __I2CGPIO_H__
#define __I2CGPIO_H__


//==========================================================================;
//
// I2C section
//
// I2C Commands
#define I2C_COMMAND_NULL         0X0000
#define I2C_COMMAND_READ         0X0001
#define I2C_COMMAND_WRITE        0X0002
#define I2C_COMMAND_STATUS       0X0004
#define I2C_COMMAND_RESET        0X0008

// The following flags are provided on a READ or WRITE command
#define I2C_FLAGS_START          0X0001 // START + addx
#define I2C_FLAGS_STOP           0X0002 // STOP
#define I2C_FLAGS_DATACHAINING   0X0004 // STOP, START + addx 
#define I2C_FLAGS_ACK            0X0010 // ACKNOWLEDGE (normally set)

// The following status flags are returned on completion of the operation
#define I2C_STATUS_NOERROR       0X0000  
#define I2C_STATUS_BUSY          0X0001
#define I2C_STATUS_ERROR         0X0002

typedef struct _I2CControl {
        ULONG Command;          // I2C_COMMAND_*
        DWORD dwCookie;         // Context identifier returned on Open
        BYTE  Data;             // Data to write, or returned byte
        BYTE  Reserved[3];      // Filler
        ULONG Flags;            // I2C_FLAGS_*
        ULONG Status;           // I2C_STATUS_*
        ULONG ClockRate;        // Bus clockrate in Hz.
} I2CControl, *PI2CControl;


//==========================================================================;
//
// GPIO section
//
// GPIO Commands

#define GPIO_COMMAND_QUERY          0X0001      // get #pins and nBufferSize
#define GPIO_COMMAND_OPEN           0X0001      // old open
#define GPIO_COMMAND_OPEN_PINS      0X0002      // get dwCookie
#define GPIO_COMMAND_CLOSE_PINS     0X0004      // invalidate cookie
#define GPIO_COMMAND_READ_BUFFER    0X0008
#define GPIO_COMMAND_WRITE_BUFFER   0X0010

// The following flags are provided on a READ_BUFFER or WRITE_BUFFER command
// lpPins bits set MUST have contiguous bits set for a read/write command.
//
// On a READ, if the number of pins set in the bitmask does not fill a 
// byte/word/dword, then zeros are returned for those positions. 
// on a WRITE, if the number of pins set in the bitmask does not fill a 
// byte/word/dword, a read/modify/write is done on the port/mmio position
// that represents those bits.

#define GPIO_FLAGS_BYTE             0x0001  // do byte read/write
#define GPIO_FLAGS_WORD             0x0002  // do word read/write
#define GPIO_FLAGS_DWORD            0x0004  // do dword read/write

// The following status flags are returned on completion of the operation
#define GPIO_STATUS_NOERROR     0X0000  
#define GPIO_STATUS_BUSY        0X0001
#define GPIO_STATUS_ERROR       0X0002
#define GPIO_STATUS_NO_ASYNC    0X0004

typedef struct _GPIOControl {
    ULONG Command;          // GPIO_COMMAND_*
    ULONG Flags;            // GPIO_FLAGS_*
    DWORD dwCookie;         // Context identifier returned on Open
    ULONG Status;           // GPIO_STATUS_*
    ULONG nBytes;           // # of bytes to send or recieved
    ULONG nBufferSize;      // max size of buffer
    ULONG nPins;            // number of GPIO pins returned by Open
    UCHAR *Pins;            // pointer to bitmask of pins to read/write
    UCHAR *Buffer;          // pointer to GPIO data to send/recieve
    void  (*AsynchCompleteCallback)(UCHAR *Buffer);
                            // NULL if synchronous xfer, valid ptr if asynch.
    GUID  PrivateInterfaceType;
    void  (*PrivateInterface)();
    
} GPIOControl, *PGPIOControl;



#endif //__I2CGPIO_H__