xtmrctr_l.h

ucos2在macroblaze上的移植代码

/* $Id: xtmrctr_l.h,v 1.4 2004/03/25 13:51:58 meinelte Exp $ */
/******************************************************************************
*
*       XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
*       AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
*       SOLUTIONS FOR XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE,
*       OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
*       APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
*       THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
*       AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
*       FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
*       WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
*       IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
*       REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
*       INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
*       FOR A PARTICULAR PURPOSE.
*
*       (c) Copyright 2002 Xilinx Inc.
*       All rights reserved.
*
******************************************************************************/
/*****************************************************************************/
/**
*
* @file xtmrctr_l.h
*
* This header file contains identifiers and low-level driver functions (or
* macros) that can be used to access the device.  The user should refer to the
* hardware device specification for more details of the device operation.
* High-level driver functions are defined in xtmrctr.h.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who  Date     Changes
* ----- ---- -------- -----------------------------------------------
* 1.00b jhl  04/24/02 First release
* </pre>
*
******************************************************************************/

#ifndef XTMRCTR_L_H /* prevent circular inclusions */
#define XTMRCTR_L_H /* by using protection macros */

/***************************** Include Files *********************************/

#include "xbasic_types.h"
#include "xio.h"

/************************** Constant Definitions *****************************/

/**
 * Defines the number of timer counters within a single hardware device. This
 * number is not currently parameterized in the hardware but may be in the
 * future.
 */
#define XTC_DEVICE_TIMER_COUNT    2

/* Each timer counter consumes 16 bytes of address space */

#define XTC_TIMER_COUNTER_OFFSET 16

/** @name Register Offset Definitions
 * Register offsets within a timer counter, there are multiple
 * timer counters within a single device
 */

#define XTC_TCSR_OFFSET      0     /**< control/status register */
#define XTC_TLR_OFFSET       4     /**< load register */
#define XTC_TCR_OFFSET       8     /**< timer counter register */

/** @name Control Status Register Bit Definitions
 * Control Status Register bit masks
 * Used to configure the timer counter device.
 */

#define XTC_CSR_ENABLE_ALL_MASK     0x00000400  /**< Enables all timer counters */
#define XTC_CSR_ENABLE_PWM_MASK     0x00000200  /**< Enables the Pulse Width
                                                     Modulation */
#define XTC_CSR_INT_OCCURED_MASK    0x00000100  /**< If bit is set, an interrupt has
                                                     occured.*/
                                                /**< If set and '1' is written
                                                     to this bit position,
                                                     bit is cleared. */
#define XTC_CSR_ENABLE_TMR_MASK     0x00000080  /**< Enables only the specific timer */
#define XTC_CSR_ENABLE_INT_MASK     0x00000040  /**< Enables the interrupt output. */
#define XTC_CSR_LOAD_MASK           0x00000020  /**< Loads the timer using the load
                                                     value provided earlier in the
                                                     Load Register, XTC_TLR_OFFSET. */
#define XTC_CSR_AUTO_RELOAD_MASK    0x00000010  /**< In compare mode, configures the
                                                     timer counter to reload from the
                                                     Load Register. The default mode
                                                     causes the timer counter to hold
                                                     when the compare value is hit. In
                                                     capture mode, configures the
                                                     timer counter to not hold the
                                                     previous capture value if a new
                                                     event occurs. The default mode
                                                     cause the timer counter to hold
                                                     the capture value until
                                                     recognized. */
#define XTC_CSR_EXT_CAPTURE_MASK    0x00000008  /**< Enables the external input to
                                                     the timer counter. */
#define XTC_CSR_EXT_GENERATE_MASK   0x00000004  /**< Enables the external generate
                                                     output for the timer. */
#define XTC_CSR_DOWN_COUNT_MASK     0x00000002  /**< Configures the timer counter to
                                                     count down fromstart value, the
                                                     default is to count up. */
#define XTC_CSR_CAPTURE_MODE_MASK   0x00000001  /**< Enables the timer to capture the
                                                     timer counter value when the
                                                     external capture line is asserted.
                                                     The default mode is compare mode.*/

/**************************** Type Definitions *******************************/

extern Xuint8 XTmrCtr_Offsets[];

/***************** Macros (Inline Functions) Definitions *********************/

/*****************************************************************************/
/**
* Read one of the timer counter registers.
*
* @param    BaseAddress contains the base address of the timer counter device.
* @param    TmrCtrNumber contains the specific timer counter within the device,
*           a zero based number, 0 - (XTC_DEVICE_TIMER_COUNT - 1).
* @param    RegOffset contains the offset from the 1st register of the timer
*           counter to select the specific register of the timer counter.
*
* @return   The value read from the register, a 32 bit value.
*
* @note     None.
*
* Xuint32 XTmrCtr_mReadReg(Xuint32 BaseAddress, Xuint8 TimerNumber,
*                          unsigned RegOffset)
******************************************************************************/
#define XTimerCtr_mReadReg(BaseAddress, TmrCtrNumber, RegOffset)                \
    XIo_In32((BaseAddress) + XTmrCtr_Offsets[(TmrCtrNumber)] + (RegOffset))

/*****************************************************************************/
/**
* Write a specified value to a register of a timer counter.
*
* @param    BaseAddress is the base address of the timer counter device.
* @param    TmrCtrNumber is the specific timer counter within the device, a
*           zero based number, 0 - (XTC_DEVICE_TIMER_COUNT - 1).
* @param    RegOffset contain the offset from the 1st register of the timer
*           counter to select the specific register of the timer counter.
* @param    ValueToWrite is the 32 bit value to be written to the register.
*
* @return   None
*
* void XTmrCtr_mWriteReg(Xuint32 BaseAddress, Xuint8 TimerNumber,
*                        unsigned RegOffset, Xuint32 ValueToWrite)
******************************************************************************/
#define XTmrCtr_mWriteReg(BaseAddress, TmrCtrNumber, RegOffset, ValueToWrite)   \
    XIo_Out32(((BaseAddress) + XTmrCtr_Offsets[(TmrCtrNumber)] +                \
               (RegOffset)), (ValueToWrite))

/****************************************************************************/
/**
*
* Set the Control Status Register of a timer counter to the specified value.
*
* @param    BaseAddress is the base address of the device.
* @param    TmrCtrNumber is the specific timer counter within the device, a
*           zero based number, 0 - (XTC_DEVICE_TIMER_COUNT - 1).
* @param    RegisterValue is the 32 bit value to be written to the register.
*
* @return   None.
*
* @note     None.
*
* void XTmrCtr_mSetControlStatusReg(Xuint32 BaseAddress, Xuint8 TmrCtrNumber,
*                                   Xuint32 RegisterValue)
*****************************************************************************/
#define XTmrCtr_mSetControlStatusReg(BaseAddress, TmrCtrNumber, RegisterValue)  \
    XTmrCtr_mWriteReg((BaseAddress), (TmrCtrNumber), XTC_TCSR_OFFSET,           \
                       (RegisterValue))

/****************************************************************************/
/**
*
* Get the Control Status Register of a timer counter.
*
* @param    BaseAddress is the base address of the device.
* @param    TmrCtrNumber is the specific timer counter within the device, a
*           zero based number, 0 - (XTC_DEVICE_TIMER_COUNT - 1).
*
* @return   The value read from the register, a 32 bit value.
*
* @note     None.