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spi_002.c
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1 /*
2 * @brief SPI Registers and control functions
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2012
6 * All rights reserved.
7 *
8 * @par
9 * Software that is described herein is for illustrative purposes only
10 * which provides customers with programming information regarding the
11 * LPC products. This software is supplied "AS IS" without any warranties of
12 * any kind, and NXP Semiconductors and its licensor disclaim any and
13 * all warranties, express or implied, including all implied warranties of
14 * merchantability, fitness for a particular purpose and non-infringement of
15 * intellectual property rights. NXP Semiconductors assumes no responsibility
16 * or liability for the use of the software, conveys no license or rights under any
17 * patent, copyright, mask work right, or any other intellectual property rights in
18 * or to any products. NXP Semiconductors reserves the right to make changes
19 * in the software without notification. NXP Semiconductors also makes no
20 * representation or warranty that such application will be suitable for the
21 * specified use without further testing or modification.
22 *
23 * @par
24 * Permission to use, copy, modify, and distribute this software and its
25 * documentation is hereby granted, under NXP Semiconductors' and its
26 * licensor's relevant copyrights in the software, without fee, provided that it
27 * is used in conjunction with NXP Semiconductors microcontrollers. This
28 * copyright, permission, and disclaimer notice must appear in all copies of
29 * this code.
30 */
31
32 #include "spi_002.h"
33
34 /*****************************************************************************
35 * Private types/enumerations/variables
36 ****************************************************************************/
37
38 /*****************************************************************************
39 * Public types/enumerations/variables
40 ****************************************************************************/
41
42 /*****************************************************************************
43 * Private functions
44 ****************************************************************************/
45
46 /*****************************************************************************
47 * Public functions
48 ****************************************************************************/
49
50 /* Initialize SPI peripheral block */
51 void IP_SPI_Init(IP_SPI_002_T *pSPI, IP_SPI_CONFIG_T *pConfig)
52 {
53 uint32_t EnStat = pSPI->CFG & SPI_CFG_SPI_EN;
54
55 /* Disable before update CFG register */
56 if (EnStat) {
57 IP_SPI_Disable(pSPI);
58 }
59
60 /* SPI Configurate */
61 pSPI->CFG = ((uint32_t) pConfig->ClockMode) | ((uint32_t) pConfig->DataOrder) | ((uint32_t) pConfig->Mode) |
62 ((uint32_t) pConfig->SSELPol);
63
64 /* Rate Divider setting */
65 pSPI->DIV = SPI_DIV_VAL(pConfig->ClkDiv);
66
67 /* Clear status flag*/
68 IP_SPI_ClearStatus(pSPI, SPI_STAT_CLR_RXOV | SPI_STAT_CLR_TXUR | SPI_STAT_CLR_SSA | SPI_STAT_CLR_SSD);
69
70 /* Return the previous state */
71 if (EnStat) {
72 IP_SPI_Enable(pSPI);
73 }
74 }
75
76 /* Configure SPI Delay parameters */
77 void IP_SPI_DelayConfig(IP_SPI_002_T *pSPI, IP_SPI_DELAY_CONFIG_T *pConfig)
78 {
79 pSPI->DLY = SPI_DLY_PRE_DELAY(pConfig->PreDelay);
80 pSPI->DLY |= SPI_DLY_POST_DELAY(pConfig->PostDelay);
81 pSPI->DLY |= SPI_DLY_FRAME_DELAY(pConfig->FrameDelay);
82 if (pConfig->TransferDelay) {
83 pSPI->DLY |= SPI_DLY_TRANSFER_DELAY(pConfig->TransferDelay - 1);
84 }
85 }