Jonne Valola / PokittoLib Featured

PokittoLib is the library needed for programming the Pokitto DIY game console (www.pokitto.com)

Dependents:   YATTT sd_map_test cPong SnowDemo ... more

PokittoLib

Library for programming Pokitto hardware

How to Use

  1. Import this library to online compiler (see button "import" on the right hand side
  2. DO NOT import mbed-src anymore, a better version is now included inside PokittoLib
  3. Change My_settings.h according to your project
  4. Start coding!

POKITTO_HW/timer_11u6x.c@30:796f9611d2ac, 2018-01-30 (annotated)

Committer:
Pokitto
Date:
Tue Jan 30 10:41:12 2018 +0000
Revision:
30:796f9611d2ac
Sound enhancements done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pokitto 30:796f9611d2ac 1 /*
Pokitto 30:796f9611d2ac 2 * @brief LPC11u6x 16/32-bit Timer/PWM control functions
Pokitto 30:796f9611d2ac 3 *
Pokitto 30:796f9611d2ac 4 * @note
Pokitto 30:796f9611d2ac 5 * Copyright(C) NXP Semiconductors, 2013
Pokitto 30:796f9611d2ac 6 * All rights reserved.
Pokitto 30:796f9611d2ac 7 *
Pokitto 30:796f9611d2ac 8 * @par
Pokitto 30:796f9611d2ac 9 * Software that is described herein is for illustrative purposes only
Pokitto 30:796f9611d2ac 10 * which provides customers with programming information regarding the
Pokitto 30:796f9611d2ac 11 * LPC products. This software is supplied "AS IS" without any warranties of
Pokitto 30:796f9611d2ac 12 * any kind, and NXP Semiconductors and its licensor disclaim any and
Pokitto 30:796f9611d2ac 13 * all warranties, express or implied, including all implied warranties of
Pokitto 30:796f9611d2ac 14 * merchantability, fitness for a particular purpose and non-infringement of
Pokitto 30:796f9611d2ac 15 * intellectual property rights. NXP Semiconductors assumes no responsibility
Pokitto 30:796f9611d2ac 16 * or liability for the use of the software, conveys no license or rights under any
Pokitto 30:796f9611d2ac 17 * patent, copyright, mask work right, or any other intellectual property rights in
Pokitto 30:796f9611d2ac 18 * or to any products. NXP Semiconductors reserves the right to make changes
Pokitto 30:796f9611d2ac 19 * in the software without notification. NXP Semiconductors also makes no
Pokitto 30:796f9611d2ac 20 * representation or warranty that such application will be suitable for the
Pokitto 30:796f9611d2ac 21 * specified use without further testing or modification.
Pokitto 30:796f9611d2ac 22 *
Pokitto 30:796f9611d2ac 23 * @par
Pokitto 30:796f9611d2ac 24 * Permission to use, copy, modify, and distribute this software and its
Pokitto 30:796f9611d2ac 25 * documentation is hereby granted, under NXP Semiconductors' and its
Pokitto 30:796f9611d2ac 26 * licensor's relevant copyrights in the software, without fee, provided that it
Pokitto 30:796f9611d2ac 27 * is used in conjunction with NXP Semiconductors microcontrollers. This
Pokitto 30:796f9611d2ac 28 * copyright, permission, and disclaimer notice must appear in all copies of
Pokitto 30:796f9611d2ac 29 * this code.
Pokitto 30:796f9611d2ac 30 */
Pokitto 30:796f9611d2ac 31
Pokitto 30:796f9611d2ac 32 //#include "chip.h"
Pokitto 30:796f9611d2ac 33 //#include "lpc_defs.h"
Pokitto 30:796f9611d2ac 34 #include "timer_11u6x.h"
Pokitto 30:796f9611d2ac 35 #include "clock_11u6x.h"
Pokitto 30:796f9611d2ac 36
Pokitto 30:796f9611d2ac 37 /* System oscillator rate and RTC oscillator rate */
Pokitto 30:796f9611d2ac 38 const uint32_t OscRateIn = 12000000;
Pokitto 30:796f9611d2ac 39 const uint32_t RTCOscRateIn = 32768;
Pokitto 30:796f9611d2ac 40
Pokitto 30:796f9611d2ac 41
Pokitto 30:796f9611d2ac 42 /*****************************************************************************
Pokitto 30:796f9611d2ac 43 * Private types/enumerations/variables
Pokitto 30:796f9611d2ac 44 ****************************************************************************/
Pokitto 30:796f9611d2ac 45
Pokitto 30:796f9611d2ac 46 /*****************************************************************************
Pokitto 30:796f9611d2ac 47 * Public types/enumerations/variables
Pokitto 30:796f9611d2ac 48 ****************************************************************************/
Pokitto 30:796f9611d2ac 49
Pokitto 30:796f9611d2ac 50 /*****************************************************************************
Pokitto 30:796f9611d2ac 51 * Private functions
Pokitto 30:796f9611d2ac 52 ****************************************************************************/
Pokitto 30:796f9611d2ac 53
Pokitto 30:796f9611d2ac 54 /* Static data/function define */
Pokitto 30:796f9611d2ac 55 #define STATIC static
Pokitto 30:796f9611d2ac 56 /* External data/function define */
Pokitto 30:796f9611d2ac 57 #define EXTERN extern
Pokitto 30:796f9611d2ac 58
Pokitto 30:796f9611d2ac 59
Pokitto 30:796f9611d2ac 60
Pokitto 30:796f9611d2ac 61
Pokitto 30:796f9611d2ac 62 /* Returns clock index for a specific timer referenced by IP block address */
Pokitto 30:796f9611d2ac 63 STATIC CHIP_SYSCTL_CLOCK_T Chip_TIMER_GetClock(LPC_TIMER_T *pTMR)
Pokitto 30:796f9611d2ac 64 {
Pokitto 30:796f9611d2ac 65 CHIP_SYSCTL_CLOCK_T tmrClk;
Pokitto 30:796f9611d2ac 66 if (pTMR == LPC_TIMER32_1) {
Pokitto 30:796f9611d2ac 67 tmrClk = SYSCTL_CLOCK_CT32B1;
Pokitto 30:796f9611d2ac 68 }
Pokitto 30:796f9611d2ac 69 else if (pTMR == LPC_TIMER16_0) {
Pokitto 30:796f9611d2ac 70 tmrClk = SYSCTL_CLOCK_CT16B0;
Pokitto 30:796f9611d2ac 71 }
Pokitto 30:796f9611d2ac 72 else if (pTMR == LPC_TIMER16_1) {
Pokitto 30:796f9611d2ac 73 tmrClk = SYSCTL_CLOCK_CT16B1;
Pokitto 30:796f9611d2ac 74 }
Pokitto 30:796f9611d2ac 75 else {
Pokitto 30:796f9611d2ac 76 tmrClk = SYSCTL_CLOCK_CT32B0;
Pokitto 30:796f9611d2ac 77 }
Pokitto 30:796f9611d2ac 78
Pokitto 30:796f9611d2ac 79 return tmrClk;
Pokitto 30:796f9611d2ac 80 }
Pokitto 30:796f9611d2ac 81
Pokitto 30:796f9611d2ac 82 /*****************************************************************************
Pokitto 30:796f9611d2ac 83 * Public functions
Pokitto 30:796f9611d2ac 84 ****************************************************************************/
Pokitto 30:796f9611d2ac 85
Pokitto 30:796f9611d2ac 86 /* Initialize a timer */
Pokitto 30:796f9611d2ac 87 void Chip_TIMER_Init(LPC_TIMER_T *pTMR)
Pokitto 30:796f9611d2ac 88 {
Pokitto 30:796f9611d2ac 89 Chip_Clock_EnablePeriphClock(Chip_TIMER_GetClock(pTMR));
Pokitto 30:796f9611d2ac 90 }
Pokitto 30:796f9611d2ac 91
Pokitto 30:796f9611d2ac 92 /* Shutdown a timer */
Pokitto 30:796f9611d2ac 93 void Chip_TIMER_DeInit(LPC_TIMER_T *pTMR)
Pokitto 30:796f9611d2ac 94 {
Pokitto 30:796f9611d2ac 95 Chip_Clock_DisablePeriphClock(Chip_TIMER_GetClock(pTMR));
Pokitto 30:796f9611d2ac 96 }
Pokitto 30:796f9611d2ac 97
Pokitto 30:796f9611d2ac 98 /* Resets the timer terminal and prescale counts to 0 */
Pokitto 30:796f9611d2ac 99 void Chip_TIMER_Reset(LPC_TIMER_T *pTMR)
Pokitto 30:796f9611d2ac 100 {
Pokitto 30:796f9611d2ac 101 uint32_t reg;
Pokitto 30:796f9611d2ac 102
Pokitto 30:796f9611d2ac 103 /* Disable timer, set terminal count to non-0 */
Pokitto 30:796f9611d2ac 104 reg = pTMR->TCR;
Pokitto 30:796f9611d2ac 105 pTMR->TCR = 0;
Pokitto 30:796f9611d2ac 106 pTMR->TC = 1;
Pokitto 30:796f9611d2ac 107
Pokitto 30:796f9611d2ac 108 /* Reset timer counter */
Pokitto 30:796f9611d2ac 109 pTMR->TCR = TIMER_RESET;
Pokitto 30:796f9611d2ac 110
Pokitto 30:796f9611d2ac 111 /* Wait for terminal count to clear */
Pokitto 30:796f9611d2ac 112 while (pTMR->TC != 0) {}
Pokitto 30:796f9611d2ac 113
Pokitto 30:796f9611d2ac 114 /* Restore timer state */
Pokitto 30:796f9611d2ac 115 pTMR->TCR = reg;
Pokitto 30:796f9611d2ac 116 }
Pokitto 30:796f9611d2ac 117
Pokitto 30:796f9611d2ac 118 /* Sets external match control (MATn.matchnum) pin control */
Pokitto 30:796f9611d2ac 119 void Chip_TIMER_ExtMatchControlSet(LPC_TIMER_T *pTMR, int8_t initial_state,
Pokitto 30:796f9611d2ac 120 TIMER_PIN_MATCH_STATE_T matchState, int8_t matchnum)
Pokitto 30:796f9611d2ac 121 {
Pokitto 30:796f9611d2ac 122 uint32_t mask, reg;
Pokitto 30:796f9611d2ac 123
Pokitto 30:796f9611d2ac 124 /* Clear bits corresponding to selected match register */
Pokitto 30:796f9611d2ac 125 mask = (1 << matchnum) | (0x03 << (4 + (matchnum * 2)));
Pokitto 30:796f9611d2ac 126 reg = pTMR->EMR &= ~mask;
Pokitto 30:796f9611d2ac 127
Pokitto 30:796f9611d2ac 128 /* Set new configuration for selected match register */
Pokitto 30:796f9611d2ac 129 pTMR->EMR = reg | (((uint32_t) initial_state) << matchnum) |
Pokitto 30:796f9611d2ac 130 (((uint32_t) matchState) << (4 + (matchnum * 2)));
Pokitto 30:796f9611d2ac 131 }
Pokitto 30:796f9611d2ac 132