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timer_001.c
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1 /*
2  * @brief 32-bit Timer/PWM 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 "timer_001.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 /* Resets the timer terminal and prescale counts to 0 */
52 {
53  uint32_t reg;
54 
55  /* Disable timer, set terminal count to non-0 */
56  reg = timer->TCR;
57  timer->TCR = 0;
58  timer->TC = 1;
59 
60  /* Reset timer counter */
61  timer->TCR = TIMER_RESET;
62 
63  /* Wait for terminal count to clear */
64  while (timer->TC != 0) {}
65 
66  /* Restore timer state */
67  timer->TCR = reg;
68 }
69 
70 /* Sets external match control (MATn.matchnum) pin control */
71 void IP_TIMER_ExtMatchControlSet(IP_TIMER_001_Type *timer, int8_t initial_state,
72  IP_TIMER_PIN_MATCH_STATE_Type matchState, int8_t matchnum)
73 {
74  timer->EMR = (((uint32_t) initial_state) << matchnum) |
75  (((uint32_t) matchState) << (4 + (matchnum * 2)));
76 }
77 
78 /* Sets timer count source and edge with the selected passed from CapSrc */
80  IP_TIMER_CAP_SRC_STATE_Type capSrc, int8_t capnum)
81 {
82  timer->CTCR = (uint32_t) capSrc | ((uint32_t) capnum) << 2;
83 }