1 /*
2 * Copyright (c) 2015-2019, Texas Instruments Incorporated
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * * Neither the name of Texas Instruments Incorporated nor the names of
17 * its contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32 /*
33 * ======== I2S.c ========
34 */
35
36 #include <ti/drivers/I2S.h>
37
38 extern const I2S_Config I2S_config[];
39 extern const uint_least8_t I2S_count;
40
41 /* Default I2S parameters structure */
42 const I2S_Params I2S_defaultParams = {
43 .samplingFrequency = 8000, /* Sampling Freq */
44 .memorySlotLength = I2S_MEMORY_LENGTH_16BITS, /* Memory slot length */
45 .moduleRole = I2S_MASTER, /* Master / Slave selection */
46 .trueI2sFormat = (bool)true, /* Activate true I2S format */
47 .invertWS = (bool)true, /* WS inversion */
48 .isMSBFirst = (bool)true, /* Endianness selection */
49 .isDMAUnused = (bool)false, /* Selection between DMA and CPU transmissions */
50 .samplingEdge = I2S_SAMPLING_EDGE_RISING, /* Sampling edge */
51 .beforeWordPadding = 0, /* Before sample padding */
52 .bitsPerWord = 16, /* Bits/Sample */
53 .afterWordPadding = 0, /* After sample padding */
54 .fixedBufferLength = 1, /* Fixed Buffer Length */
55 .SD0Use = I2S_SD0_OUTPUT, /* SD0Use */
56 .SD1Use = I2S_SD1_INPUT, /* SD1Use */
57 .SD0Channels = I2S_CHANNELS_STEREO, /* Channels activated on SD0 */
58 .SD1Channels = I2S_CHANNELS_STEREO, /* Channels activated on SD1 */
59 .phaseType = I2S_PHASE_TYPE_DUAL, /* Phase type */
60 .startUpDelay = 0, /* Start up delay */
61 .MCLKDivider = 40, /* MCLK divider */
62 .readCallback = NULL, /* Read callback */
63 .writeCallback = NULL, /* Write callback */
64 .errorCallback = NULL, /* Error callback */
65 .custom = NULL, /* customParams */
66 };
67
68 /*
69 * ======== I2S_Params_init ========
70 */
I2S_Params_init(I2S_Params * params)71 void I2S_Params_init(I2S_Params *params)
72 {
73 *params = I2S_defaultParams;
74 }
75
76 /*
77 * ======== I2S_Transaction_init ========
78 */
I2S_Transaction_init(I2S_Transaction * transaction)79 void I2S_Transaction_init(I2S_Transaction *transaction)
80 {
81 transaction->bufPtr = NULL;
82 transaction->bufSize = 0;
83 transaction->bytesTransferred = 0;
84 transaction->untransferredBytes = 0;
85 transaction->numberOfCompletions = 0;
86 transaction->arg = (uintptr_t)NULL;
87 }
88
