Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

common/mbed_rtc_time.cpp@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "rtc_api.h"
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 #include <time.h>
<> 144:ef7eb2e8f9f7 19 #include "critical.h"
<> 144:ef7eb2e8f9f7 20 #include "rtc_time.h"
<> 144:ef7eb2e8f9f7 21 #include "us_ticker_api.h"
<> 144:ef7eb2e8f9f7 22 #include "SingletonPtr.h"
<> 144:ef7eb2e8f9f7 23 #include "PlatformMutex.h"
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 static SingletonPtr<PlatformMutex> _mutex;
<> 144:ef7eb2e8f9f7 26
<> 144:ef7eb2e8f9f7 27 #if DEVICE_RTC
<> 144:ef7eb2e8f9f7 28 static void (*_rtc_init)(void) = rtc_init;
<> 144:ef7eb2e8f9f7 29 static int (*_rtc_isenabled)(void) = rtc_isenabled;
<> 144:ef7eb2e8f9f7 30 static time_t (*_rtc_read)(void) = rtc_read;
<> 144:ef7eb2e8f9f7 31 static void (*_rtc_write)(time_t t) = rtc_write;
<> 144:ef7eb2e8f9f7 32 #else
<> 144:ef7eb2e8f9f7 33 static void (*_rtc_init)(void) = NULL;
<> 144:ef7eb2e8f9f7 34 static int (*_rtc_isenabled)(void) = NULL;
<> 144:ef7eb2e8f9f7 35 static time_t (*_rtc_read)(void) = NULL;
<> 144:ef7eb2e8f9f7 36 static void (*_rtc_write)(time_t t) = NULL;
<> 144:ef7eb2e8f9f7 37 #endif
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 40 extern "C" {
<> 144:ef7eb2e8f9f7 41 #endif
<> 144:ef7eb2e8f9f7 42 #if defined (__ICCARM__)
<> 144:ef7eb2e8f9f7 43 time_t __time32(time_t *timer)
<> 144:ef7eb2e8f9f7 44 #else
<> 144:ef7eb2e8f9f7 45 time_t time(time_t *timer)
<> 144:ef7eb2e8f9f7 46 #endif
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 {
<> 144:ef7eb2e8f9f7 49 _mutex->lock();
<> 144:ef7eb2e8f9f7 50 if (_rtc_isenabled != NULL) {
<> 144:ef7eb2e8f9f7 51 if (!(_rtc_isenabled())) {
<> 144:ef7eb2e8f9f7 52 set_time(0);
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54 }
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 time_t t = 0;
<> 144:ef7eb2e8f9f7 57 if (_rtc_read != NULL) {
<> 144:ef7eb2e8f9f7 58 t = _rtc_read();
<> 144:ef7eb2e8f9f7 59 }
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 if (timer != NULL) {
<> 144:ef7eb2e8f9f7 62 *timer = t;
<> 144:ef7eb2e8f9f7 63 }
<> 144:ef7eb2e8f9f7 64 _mutex->unlock();
<> 144:ef7eb2e8f9f7 65 return t;
<> 144:ef7eb2e8f9f7 66 }
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 void set_time(time_t t) {
<> 144:ef7eb2e8f9f7 69 _mutex->lock();
<> 144:ef7eb2e8f9f7 70 if (_rtc_init != NULL) {
<> 144:ef7eb2e8f9f7 71 _rtc_init();
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73 if (_rtc_write != NULL) {
<> 144:ef7eb2e8f9f7 74 _rtc_write(t);
<> 144:ef7eb2e8f9f7 75 }
<> 144:ef7eb2e8f9f7 76 _mutex->unlock();
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 clock_t clock() {
<> 144:ef7eb2e8f9f7 80 _mutex->lock();
<> 144:ef7eb2e8f9f7 81 clock_t t = us_ticker_read();
<> 144:ef7eb2e8f9f7 82 t /= 1000000 / CLOCKS_PER_SEC; // convert to processor time
<> 144:ef7eb2e8f9f7 83 _mutex->unlock();
<> 144:ef7eb2e8f9f7 84 return t;
<> 144:ef7eb2e8f9f7 85 }
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 void attach_rtc(time_t (*read_rtc)(void), void (*write_rtc)(time_t), void (*init_rtc)(void), int (*isenabled_rtc)(void)) {
<> 144:ef7eb2e8f9f7 88 _mutex->lock();
<> 144:ef7eb2e8f9f7 89 _rtc_read = read_rtc;
<> 144:ef7eb2e8f9f7 90 _rtc_write = write_rtc;
<> 144:ef7eb2e8f9f7 91 _rtc_init = init_rtc;
<> 144:ef7eb2e8f9f7 92 _rtc_isenabled = isenabled_rtc;
<> 144:ef7eb2e8f9f7 93 _mutex->unlock();
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97
<> 144:ef7eb2e8f9f7 98 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 99 }
<> 144:ef7eb2e8f9f7 100 #endif