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

- Main Page
- Modules
- Data Structures
- Files
- Related Pages

- File List
- Globals

All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
ritimer_17xx_40xx.c
Go to the documentation of this file.
1 /*
2 * @brief LPC17xx/40xx RITimer chip 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 "chip.h"
33
34 #if defined(CHIP_LPC175X_6X)
35
36 /*****************************************************************************
37 * Private types/enumerations/variables
38 ****************************************************************************/
39
40 /*****************************************************************************
41 * Public types/enumerations/variables
42 ****************************************************************************/
43
44 /*****************************************************************************
45 * Private functions
46 ****************************************************************************/
47
48 /*****************************************************************************
49 * Public functions
50 ****************************************************************************/
51
52 /* Initialize the RIT */
53 void Chip_RIT_Init(LPC_RITIMER_T *pRITimer)
54 {
55 Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_RIT);
56 IP_RIT_Init(pRITimer);
57 }
58
59 /* DeInitialize the RIT */
60 void Chip_RIT_DeInit(LPC_RITIMER_T *pRITimer)
61 {
62 IP_RIT_DeInit(pRITimer);
63 Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_RIT);
64 }
65
66 /* Set timer interval value */
67 void Chip_RIT_SetTimerInterval(LPC_RITIMER_T *pRITimer, uint32_t time_interval)
68 {
69 uint32_t cmp_value;
70
71 /* Determine aapproximate compare value based on clock rate and passed interval */
72 cmp_value = (Chip_Clock_GetPeripheralClockRate(SYSCTL_PCLK_RIT) / 1000) * time_interval;
73
74 /* Set timer compare value */
75 Chip_RIT_SetCOMPVAL(pRITimer, cmp_value);
76
77 /* Set timer enable clear bit to clear timer to 0 whenever
78 counter value equals the contents of RICOMPVAL */
79 Chip_RIT_EnableCTRL(pRITimer, RIT_CTRL_ENCLR);
80 }
81
82 #endif /* defined(CHIP_LPC175X_6X) */