1 /******************************************************************************
2 * Filename: aux_tdc.c
3 * Revised: 2017-04-26 18:27:45 +0200 (Wed, 26 Apr 2017)
4 * Revision: 48852
5 *
6 * Description: Driver for the AUX Time to Digital Converter interface.
7 *
8 * Copyright (c) 2015 - 2017, 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 "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 #if !defined(DOXYGEN)
48 #undef AUXTDCConfigSet
49 #define AUXTDCConfigSet NOROM_AUXTDCConfigSet
50 #undef AUXTDCMeasurementDone
51 #define AUXTDCMeasurementDone NOROM_AUXTDCMeasurementDone
52 #endif
53
54 //*****************************************************************************
55 //
56 // Configure the operation of the AUX TDC
57 //
58 //*****************************************************************************
59 void
AUXTDCConfigSet(uint32_t ui32Base,uint32_t ui32StartCondition,uint32_t ui32StopCondition)60 AUXTDCConfigSet(uint32_t ui32Base, uint32_t ui32StartCondition,
61 uint32_t ui32StopCondition)
62 {
63 // Check the arguments.
64 ASSERT(AUXTDCBaseValid(ui32Base));
65
66 // Make sure the AUX TDC is in the idle state before changing the
67 // configuration.
68 while(!((HWREG(ui32Base + AUX_TDC_O_STAT) & AUX_TDC_STAT_STATE_M) ==
69 AUX_TDC_STAT_STATE_IDLE))
70 {
71 }
72
73 // Clear previous results.
74 HWREG(ui32Base + AUX_TDC_O_CTL) = 0x0;
75
76 // Change the configuration.
77 HWREG(ui32Base + AUX_TDC_O_TRIGSRC) = ui32StartCondition | ui32StopCondition;
78 }
79
80 //*****************************************************************************
81 //
82 // Check if the AUX TDC is done measuring
83 //
84 //*****************************************************************************
85 uint32_t
AUXTDCMeasurementDone(uint32_t ui32Base)86 AUXTDCMeasurementDone(uint32_t ui32Base)
87 {
88 uint32_t ui32Reg;
89 uint32_t ui32Status;
90
91 // Check the arguments.
92 ASSERT(AUXTDCBaseValid(ui32Base));
93
94 // Check if the AUX TDC is done measuring.
95 ui32Reg = HWREG(ui32Base + AUX_TDC_O_STAT);
96 if(ui32Reg & AUX_TDC_STAT_DONE)
97 {
98 ui32Status = AUX_TDC_DONE;
99 }
100 else if(ui32Reg & AUX_TDC_STAT_SAT)
101 {
102 ui32Status = AUX_TDC_TIMEOUT;
103 }
104 else
105 {
106 ui32Status = AUX_TDC_BUSY;
107 }
108
109 // Return the status.
110 return (ui32Status);
111 }
112
