hw_udma.h

基于TI公司Cortex-M3的uart超级通信开发

//*****************************************************************************
//
// hw_udma.h - Macros for use in accessing the UDMA registers.
//
// Copyright (c) 2007-2009 Luminary Micro, Inc.  All rights reserved.
// Software License Agreement
// 
// Luminary Micro, Inc. (LMI) is supplying this software for use solely and
// exclusively on LMI's microcontroller products.
// 
// The software is owned by LMI and/or its suppliers, and is protected under
// applicable copyright laws.  All rights are reserved.  You may not combine
// this software with "viral" open-source software in order to form a larger
// program.  Any use in violation of the foregoing restrictions may subject
// the user to criminal sanctions under applicable laws, as well as to civil
// liability for the breach of the terms and conditions of this license.
// 
// THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
// LMI SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
// CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
// 
// This is part of revision 5228 of the Stellaris Firmware Development Package.
//
//*****************************************************************************

#ifndef __HW_UDMA_H__
#define __HW_UDMA_H__

//*****************************************************************************
//
// The following are defines for the Micro Direct Memory Access (uDMA) offsets.
//
//*****************************************************************************
#define UDMA_STAT               0x400FF000  // DMA Status
#define UDMA_CFG                0x400FF004  // DMA Configuration
#define UDMA_CTLBASE            0x400FF008  // DMA Channel Control Base Pointer
#define UDMA_ALTBASE            0x400FF00C  // DMA Alternate Channel Control
                                            // Base Pointer
#define UDMA_WAITSTAT           0x400FF010  // DMA Channel Wait on Request
                                            // Status
#define UDMA_SWREQ              0x400FF014  // DMA Channel Software Request
#define UDMA_USEBURSTSET        0x400FF018  // DMA Channel Useburst Set
#define UDMA_USEBURSTCLR        0x400FF01C  // DMA Channel Useburst Clear
#define UDMA_REQMASKSET         0x400FF020  // DMA Channel Request Mask Set
#define UDMA_REQMASKCLR         0x400FF024  // DMA Channel Request Mask Clear
#define UDMA_ENASET             0x400FF028  // DMA Channel Enable Set
#define UDMA_ENACLR             0x400FF02C  // DMA Channel Enable Clear
#define UDMA_ALTSET             0x400FF030  // DMA Channel Primary Alternate
                                            // Set
#define UDMA_ALTCLR             0x400FF034  // DMA Channel Primary Alternate
                                            // Clear
#define UDMA_PRIOSET            0x400FF038  // DMA Channel Priority Set
#define UDMA_PRIOCLR            0x400FF03C  // DMA Channel Priority Clear
#define UDMA_ERRCLR             0x400FF04C  // DMA Bus Error Clear
#define UDMA_CHALT              0x400FF500  // DMA Channel Alternate Select

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_STAT register.
//
//*****************************************************************************
#define UDMA_STAT_DMACHANS_M    0x001F0000  // Available DMA Channels Minus 1
#define UDMA_STAT_STATE_M       0x000000F0  // Control State Machine State
#define UDMA_STAT_STATE_IDLE    0x00000000  // Idle
#define UDMA_STAT_STATE_RD_CTRL 0x00000010  // Reading channel controller data
#define UDMA_STAT_STATE_RD_SRCENDP \
                                0x00000020  // Reading source end pointer
#define UDMA_STAT_STATE_RD_DSTENDP \
                                0x00000030  // Reading destination end pointer
#define UDMA_STAT_STATE_RD_SRCDAT \
                                0x00000040  // Reading source data
#define UDMA_STAT_STATE_WR_DSTDAT \
                                0x00000050  // Writing destination data
#define UDMA_STAT_STATE_WAIT    0x00000060  // Waiting for DMA request to clear
#define UDMA_STAT_STATE_WR_CTRL 0x00000070  // Writing channel controller data
#define UDMA_STAT_STATE_STALL   0x00000080  // Stalled
#define UDMA_STAT_STATE_DONE    0x00000090  // Done
#define UDMA_STAT_STATE_UNDEF   0x000000A0  // Undefined
#define UDMA_STAT_MASTEN        0x00000001  // Master Enable
#define UDMA_STAT_DMACHANS_S    16

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_CFG register.
//
//*****************************************************************************
#define UDMA_CFG_MASTEN         0x00000001  // Controller Master Enable

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_CTLBASE register.
//
//*****************************************************************************
#define UDMA_CTLBASE_ADDR_M     0xFFFFFC00  // Channel Control Base Address
#define UDMA_CTLBASE_ADDR_S     10

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_ALTBASE register.
//
//*****************************************************************************
#define UDMA_ALTBASE_ADDR_M     0xFFFFFFFF  // Alternate Channel Address
                                            // Pointer
#define UDMA_ALTBASE_ADDR_S     0

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_WAITSTAT register.
//
//*****************************************************************************
#define UDMA_WAITSTAT_WAITREQ_M 0xFFFFFFFF  // Channel [n] Wait Status

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_SWREQ register.
//
//*****************************************************************************
#define UDMA_SWREQ_M            0xFFFFFFFF  // Channel [n] Software Request

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_USEBURSTSET
// register.
//
//*****************************************************************************
#define UDMA_USEBURSTSET_SET_M  0xFFFFFFFF  // Channel [n] Useburst Set

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_USEBURSTCLR
// register.
//
//*****************************************************************************
#define UDMA_USEBURSTCLR_CLR_M  0xFFFFFFFF  // Channel [n] Useburst Clear

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_REQMASKSET
// register.
//
//*****************************************************************************
#define UDMA_REQMASKSET_SET_M   0xFFFFFFFF  // Channel [n] Request Mask Set

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_REQMASKCLR
// register.
//
//*****************************************************************************
#define UDMA_REQMASKCLR_CLR_M   0xFFFFFFFF  // Channel [n] Request Mask Clear

//*****************************************************************************
//
// The following are defines for the bit fields in the UDMA_ENASET register.
//