1 /******************************************************************************
2 * Filename: aux_tdc.c
3 *
4 * Description: Driver for the AUX Time to Digital Converter interface.
5 *
6 * Copyright (c) 2015 - 2022, Texas Instruments Incorporated
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 *
12 * 1) Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * 2) Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * 3) Neither the name of the ORGANIZATION nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 *
35 ******************************************************************************/
36
37 #include "aux_tdc.h"
38
39 //*****************************************************************************
40 //
41 // Handle support for DriverLib in ROM:
42 // This section will undo prototype renaming made in the header file
43 //
44 //*****************************************************************************
45 #if !defined(DOXYGEN)
46 #undef AUXTDCConfigSet
47 #define AUXTDCConfigSet NOROM_AUXTDCConfigSet
48 #undef AUXTDCMeasurementDone
49 #define AUXTDCMeasurementDone NOROM_AUXTDCMeasurementDone
50 #endif
51
52 //*****************************************************************************
53 //
54 // Configure the operation of the AUX TDC
55 //
56 //*****************************************************************************
57 void
AUXTDCConfigSet(uint32_t ui32Base,uint32_t ui32StartCondition,uint32_t ui32StopCondition)58 AUXTDCConfigSet(uint32_t ui32Base, uint32_t ui32StartCondition,
59 uint32_t ui32StopCondition)
60 {
61 // Check the arguments.
62 ASSERT(AUXTDCBaseValid(ui32Base));
63
64 // Make sure the AUX TDC is in the idle state before changing the
65 // configuration.
66 while(!((HWREG(ui32Base + AUX_TDC_O_STAT) & AUX_TDC_STAT_STATE_M) ==
67 AUX_TDC_STAT_STATE_IDLE))
68 {
69 }
70
71 // Clear previous results.
72 HWREG(ui32Base + AUX_TDC_O_CTL) = 0x0;
73
74 // Change the configuration.
75 HWREG(ui32Base + AUX_TDC_O_TRIGSRC) = ui32StartCondition | ui32StopCondition;
76 }
77
78 //*****************************************************************************
79 //
80 // Check if the AUX TDC is done measuring
81 //
82 //*****************************************************************************
83 uint32_t
AUXTDCMeasurementDone(uint32_t ui32Base)84 AUXTDCMeasurementDone(uint32_t ui32Base)
85 {
86 uint32_t ui32Reg;
87 uint32_t ui32Status;
88
89 // Check the arguments.
90 ASSERT(AUXTDCBaseValid(ui32Base));
91
92 // Check if the AUX TDC is done measuring.
93 ui32Reg = HWREG(ui32Base + AUX_TDC_O_STAT);
94 if(ui32Reg & AUX_TDC_STAT_DONE)
95 {
96 ui32Status = AUX_TDC_DONE;
97 }
98 else if(ui32Reg & AUX_TDC_STAT_SAT)
99 {
100 ui32Status = AUX_TDC_TIMEOUT;
101 }
102 else
103 {
104 ui32Status = AUX_TDC_BUSY;
105 }
106
107 // Return the status.
108 return (ui32Status);
109 }
110
