1 //*****************************************************************************
3 // qei.h - Prototypes for the Quadrature Encoder Driver.
5 // Copyright (c) 2005-2008 Luminary Micro, Inc. All rights reserved.
7 // Software License Agreement
9 // Luminary Micro, Inc. (LMI) is supplying this software for use solely and
10 // exclusively on LMI's microcontroller products.
12 // The software is owned by LMI and/or its suppliers, and is protected under
13 // applicable copyright laws. All rights are reserved. You may not combine
14 // this software with "viral" open-source software in order to form a larger
15 // program. Any use in violation of the foregoing restrictions may subject
16 // the user to criminal sanctions under applicable laws, as well as to civil
17 // liability for the breach of the terms and conditions of this license.
19 // THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
20 // OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
21 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
22 // LMI SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
23 // CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
25 // This is part of revision 2523 of the Stellaris Peripheral Driver Library.
27 //*****************************************************************************
32 //*****************************************************************************
34 // If building with a C++ compiler, make all of the definitions in this header
37 //*****************************************************************************
43 //*****************************************************************************
45 // Values that can be passed to QEIConfigure as the ulConfig paramater.
47 //*****************************************************************************
48 #define QEI_CONFIG_CAPTURE_A 0x00000000 // Count on ChA edges only
49 #define QEI_CONFIG_CAPTURE_A_B 0x00000008 // Count on ChA and ChB edges
50 #define QEI_CONFIG_NO_RESET 0x00000000 // Do not reset on index pulse
51 #define QEI_CONFIG_RESET_IDX 0x00000010 // Reset position on index pulse
52 #define QEI_CONFIG_QUADRATURE 0x00000000 // ChA and ChB are quadrature
53 #define QEI_CONFIG_CLOCK_DIR 0x00000004 // ChA and ChB are clock and dir
54 #define QEI_CONFIG_NO_SWAP 0x00000000 // Do not swap ChA and ChB
55 #define QEI_CONFIG_SWAP 0x00000002 // Swap ChA and ChB
57 //*****************************************************************************
59 // Values that can be passed to QEIVelocityConfigure as the ulPreDiv parameter.
61 //*****************************************************************************
62 #define QEI_VELDIV_1 0x00000000 // Predivide by 1
63 #define QEI_VELDIV_2 0x00000040 // Predivide by 2
64 #define QEI_VELDIV_4 0x00000080 // Predivide by 4
65 #define QEI_VELDIV_8 0x000000C0 // Predivide by 8
66 #define QEI_VELDIV_16 0x00000100 // Predivide by 16
67 #define QEI_VELDIV_32 0x00000140 // Predivide by 32
68 #define QEI_VELDIV_64 0x00000180 // Predivide by 64
69 #define QEI_VELDIV_128 0x000001C0 // Predivide by 128
71 //*****************************************************************************
73 // Values that can be passed to QEIEnableInts, QEIDisableInts, and QEIClearInts
74 // as the ulIntFlags parameter, and returned by QEIGetIntStatus.
76 //*****************************************************************************
77 #define QEI_INTERROR 0x00000008 // Phase error detected
78 #define QEI_INTDIR 0x00000004 // Direction change
79 #define QEI_INTTIMER 0x00000002 // Velocity timer expired
80 #define QEI_INTINDEX 0x00000001 // Index pulse detected
82 //*****************************************************************************
84 // Prototypes for the APIs.
86 //*****************************************************************************
87 extern void QEIEnable(unsigned long ulBase);
88 extern void QEIDisable(unsigned long ulBase);
89 extern void QEIConfigure(unsigned long ulBase, unsigned long ulConfig,
90 unsigned long ulMaxPosition);
91 extern unsigned long QEIPositionGet(unsigned long ulBase);
92 extern void QEIPositionSet(unsigned long ulBase, unsigned long ulPosition);
93 extern long QEIDirectionGet(unsigned long ulBase);
94 extern tBoolean QEIErrorGet(unsigned long ulBase);
95 extern void QEIVelocityEnable(unsigned long ulBase);
96 extern void QEIVelocityDisable(unsigned long ulBase);
97 extern void QEIVelocityConfigure(unsigned long ulBase, unsigned long ulPreDiv,
98 unsigned long ulPeriod);
99 extern unsigned long QEIVelocityGet(unsigned long ulBase);
100 extern void QEIIntRegister(unsigned long ulBase, void (*pfnHandler)(void));
101 extern void QEIIntUnregister(unsigned long ulBase);
102 extern void QEIIntEnable(unsigned long ulBase, unsigned long ulIntFlags);
103 extern void QEIIntDisable(unsigned long ulBase, unsigned long ulIntFlags);
104 extern unsigned long QEIIntStatus(unsigned long ulBase, tBoolean bMasked);
105 extern void QEIIntClear(unsigned long ulBase, unsigned long ulIntFlags);
107 //*****************************************************************************
109 // Mark the end of the C bindings section for C++ compilers.
111 //*****************************************************************************