LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
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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 }