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evrt_18xx_43xx.c
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1 /*
2  * @brief LPC18xx/43xx event router driver
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 "evrt_18xx_43xx.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 the EVRT */
51 void Chip_EVRT_Init(void)
52 {
53  uint8_t i = 0;
54  // Clear all register to be default
55  LPC_EVRT->HILO = 0x0000;
56  LPC_EVRT->EDGE = 0x0000;
57  LPC_EVRT->CLR_EN = 0xFFFF;
58  do {
59  i++;
60  LPC_EVRT->CLR_STAT = 0xFFFFF;
61  } while ((LPC_EVRT->STATUS != 0) && (i < 10));
62 }
63 
64 /* Set up the type of interrupt type for a source to EVRT */
66 {
67  switch (type) {
69  LPC_EVRT->HILO &= ~(1 << (uint8_t) EVRT_Src);
70  LPC_EVRT->EDGE &= ~(1 << (uint8_t) EVRT_Src);
71  break;
72 
74  LPC_EVRT->HILO |= (1 << (uint8_t) EVRT_Src);
75  LPC_EVRT->EDGE &= ~(1 << (uint8_t) EVRT_Src);
76  break;
77 
79  LPC_EVRT->HILO &= ~(1 << (uint8_t) EVRT_Src);
80  LPC_EVRT->EDGE |= (1 << (uint8_t) EVRT_Src);
81  break;
82 
84  LPC_EVRT->HILO |= (1 << (uint8_t) EVRT_Src);
85  LPC_EVRT->EDGE |= (1 << (uint8_t) EVRT_Src);
86  break;
87 
88  default:
89  break;
90  }
91 }
92 
93 /* Enable or disable interrupt sources to EVRT */
95 {
96  if (state == ENABLE) {
97  LPC_EVRT->SET_EN = (1 << (uint8_t) EVRT_Src);
98  }
99  else {
100  LPC_EVRT->CLR_EN = (1 << (uint8_t) EVRT_Src);
101  }
102 }
103 
104 /* Check if a source is sending interrupt to EVRT */
106 {
107  if (LPC_EVRT->STATUS & (1 << (uint8_t) EVRT_Src)) {
108  return SET;
109  }
110  else {return RESET; }
111 }