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aux_tdc.c
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1 /******************************************************************************
2 * Filename: aux_tdc.c
3 * Revised: 2015-01-13 16:59:55 +0100 (ti, 13 jan 2015)
4 * Revision: 42365
5 *
6 * Description: Driver for the AUX Time to Digital Converter interface.
7 *
8 * Copyright (c) 2015, Texas Instruments Incorporated
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions are met:
13 *
14 * 1) Redistributions of source code must retain the above copyright notice,
15 * this list of conditions and the following disclaimer.
16 *
17 * 2) Redistributions in binary form must reproduce the above copyright notice,
18 * this list of conditions and the following disclaimer in the documentation
19 * and/or other materials provided with the distribution.
20 *
21 * 3) Neither the name of the ORGANIZATION nor the names of its contributors may
22 * be used to endorse or promote products derived from this software without
23 * specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 *
37 ******************************************************************************/
38
39 #include <driverlib/aux_tdc.h>
40
41 //*****************************************************************************
42 //
43 // Handle support for DriverLib in ROM:
44 // This section will undo prototype renaming made in the header file
45 //
46 //*****************************************************************************
47 #ifndef DRIVERLIB_GENERATE_ROM
48 #undef AUXTDCConfigSet
49 #define AUXTDCConfigSet NOROM_AUXTDCConfigSet
50 #undef AUXTDCMeasurementDone
51 #define AUXTDCMeasurementDone NOROM_AUXTDCMeasurementDone
52 #endif
53
54 //*****************************************************************************
55 //
57 //
58 //*****************************************************************************
59 void
60 AUXTDCConfigSet(uint32_t ui32Base, uint32_t ui32StartCondition,
61 uint32_t ui32StopCondition)
62 {
63 //
64 // Check the arguments.
65 //
66 ASSERT(AUXTDCBaseValid(ui32Base));
67
68 //
69 // Make sure the AUX TDC is in the idle state before changing the
70 // configuration.
71 //
72 while(!((HWREG(ui32Base + AUX_TDC_O_STAT) & AUX_TDC_STAT_STATE_M) ==
73 AUX_TDC_STAT_STATE_IDLE))
74 {
75 }
76
77 //
78 // Clear previous results.
79 //
80 HWREG(ui32Base + AUX_TDC_O_CTL) = 0x0;
81
82 //
83 // Change the configuration.
84 //
85 HWREG(ui32Base + AUX_TDC_O_TRIGSRC) = ui32StartCondition | ui32StopCondition;
86 }
87
88 //*****************************************************************************
89 //
91 //
92 //*****************************************************************************
93 uint32_t
94 AUXTDCMeasurementDone(uint32_t ui32Base)
95 {
96 uint32_t ui32Reg;
97 uint32_t ui32Status;
98
99 //
100 // Check the arguments.
101 //
102 ASSERT(AUXTDCBaseValid(ui32Base));
103
104 //
105 // Check if the AUX TDC is done measuring.
106 //
107 ui32Reg = HWREG(ui32Base + AUX_TDC_O_STAT);
108 if(ui32Reg & AUX_TDC_STAT_DONE)
109 {
110 ui32Status = AUX_TDC_DONE;
111 }
112 else if(ui32Reg & AUX_TDC_STAT_SAT)
113 {
114 ui32Status = AUX_TDC_TIMEOUT;
115 }
116 else
117 {
118 ui32Status = AUX_TDC_BUSY;
119 }
120
121 //
122 // Return the status.
123 //
124 return (ui32Status);
125 }
AUX_TDC_BUSY
#define AUX_TDC_BUSY
Definition: aux_tdc.h:93
aux_tdc.h
ASSERT
#define ASSERT(expr)
Definition: debug.h:65
AUX_TDC_TIMEOUT
#define AUX_TDC_TIMEOUT
Definition: aux_tdc.h:94
AUXTDCConfigSet
void AUXTDCConfigSet(uint32_t ui32Base, uint32_t ui32StartCondition, uint32_t ui32StopCondition)
Configure the operation of the AUX TDC.
Definition: aux_tdc.c:60
AUX_TDC_DONE
#define AUX_TDC_DONE
Definition: aux_tdc.h:95
AUXTDCMeasurementDone
uint32_t AUXTDCMeasurementDone(uint32_t ui32Base)
Check if the AUX TDC is done measuring.
Definition: aux_tdc.c:94