Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_NUVOTON/TARGET_NUC472/rtc_api.c@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) 2015-2016 Nuvoton
<> 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
<> 144:ef7eb2e8f9f7 17 #include "rtc_api.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #if DEVICE_RTC
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #include "wait_api.h"
<> 144:ef7eb2e8f9f7 22 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 23 #include "nu_modutil.h"
<> 144:ef7eb2e8f9f7 24 #include "nu_miscutil.h"
<> 144:ef7eb2e8f9f7 25
<> 144:ef7eb2e8f9f7 26 #define YEAR0 1900
<> 144:ef7eb2e8f9f7 27 //#define EPOCH_YR 1970
<> 144:ef7eb2e8f9f7 28 static int rtc_inited = 0;
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 static const struct nu_modinit_s rtc_modinit = {RTC_0, RTC_MODULE, 0, 0, 0, RTC_IRQn, NULL};
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 void rtc_init(void)
<> 144:ef7eb2e8f9f7 33 {
<> 144:ef7eb2e8f9f7 34 if (rtc_inited) {
<> 144:ef7eb2e8f9f7 35 return;
<> 144:ef7eb2e8f9f7 36 }
<> 144:ef7eb2e8f9f7 37 rtc_inited = 1;
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 // Enable IP clock
<> 144:ef7eb2e8f9f7 40 CLK_EnableModuleClock(rtc_modinit.clkidx);
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 RTC_Open(NULL);
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 void rtc_free(void)
<> 144:ef7eb2e8f9f7 46 {
<> 144:ef7eb2e8f9f7 47 // FIXME
<> 144:ef7eb2e8f9f7 48 }
<> 144:ef7eb2e8f9f7 49
<> 144:ef7eb2e8f9f7 50 int rtc_isenabled(void)
<> 144:ef7eb2e8f9f7 51 {
<> 144:ef7eb2e8f9f7 52 return rtc_inited;
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 /*
<> 144:ef7eb2e8f9f7 56 struct tm
<> 144:ef7eb2e8f9f7 57 tm_sec seconds after the minute 0-61
<> 144:ef7eb2e8f9f7 58 tm_min minutes after the hour 0-59
<> 144:ef7eb2e8f9f7 59 tm_hour hours since midnight 0-23
<> 144:ef7eb2e8f9f7 60 tm_mday day of the month 1-31
<> 144:ef7eb2e8f9f7 61 tm_mon months since January 0-11
<> 144:ef7eb2e8f9f7 62 tm_year years since 1900
<> 144:ef7eb2e8f9f7 63 tm_wday days since Sunday 0-6
<> 144:ef7eb2e8f9f7 64 tm_yday days since January 1 0-365
<> 144:ef7eb2e8f9f7 65 tm_isdst Daylight Saving Time flag
<> 144:ef7eb2e8f9f7 66 */
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 time_t rtc_read(void)
<> 144:ef7eb2e8f9f7 69 {
<> 144:ef7eb2e8f9f7 70 if (! rtc_inited) {
<> 144:ef7eb2e8f9f7 71 rtc_init();
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73
<> 144:ef7eb2e8f9f7 74 S_RTC_TIME_DATA_T rtc_datetime;
<> 144:ef7eb2e8f9f7 75 RTC_GetDateAndTime(&rtc_datetime);
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77 struct tm timeinfo;
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 // Convert struct tm to S_RTC_TIME_DATA_T
<> 144:ef7eb2e8f9f7 80 timeinfo.tm_year = rtc_datetime.u32Year - YEAR0;
<> 144:ef7eb2e8f9f7 81 timeinfo.tm_mon = rtc_datetime.u32Month - 1;
<> 144:ef7eb2e8f9f7 82 timeinfo.tm_mday = rtc_datetime.u32Day;
<> 144:ef7eb2e8f9f7 83 timeinfo.tm_wday = rtc_datetime.u32DayOfWeek;
<> 144:ef7eb2e8f9f7 84 timeinfo.tm_hour = rtc_datetime.u32Hour;
<> 144:ef7eb2e8f9f7 85 timeinfo.tm_min = rtc_datetime.u32Minute;
<> 144:ef7eb2e8f9f7 86 timeinfo.tm_sec = rtc_datetime.u32Second;
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 // Convert to timestamp
<> 144:ef7eb2e8f9f7 89 time_t t = mktime(&timeinfo);
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 return t;
<> 144:ef7eb2e8f9f7 92 }
<> 144:ef7eb2e8f9f7 93
<> 144:ef7eb2e8f9f7 94 void rtc_write(time_t t)
<> 144:ef7eb2e8f9f7 95 {
<> 144:ef7eb2e8f9f7 96 if (! rtc_inited) {
<> 144:ef7eb2e8f9f7 97 rtc_init();
<> 144:ef7eb2e8f9f7 98 }
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 // Convert timestamp to struct tm
<> 144:ef7eb2e8f9f7 101 struct tm *timeinfo = localtime(&t);
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 S_RTC_TIME_DATA_T rtc_datetime;
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 // Convert S_RTC_TIME_DATA_T to struct tm
<> 144:ef7eb2e8f9f7 106 rtc_datetime.u32Year = timeinfo->tm_year + YEAR0;
<> 144:ef7eb2e8f9f7 107 rtc_datetime.u32Month = timeinfo->tm_mon + 1;
<> 144:ef7eb2e8f9f7 108 rtc_datetime.u32Day = timeinfo->tm_mday;
<> 144:ef7eb2e8f9f7 109 rtc_datetime.u32DayOfWeek = timeinfo->tm_wday;
<> 144:ef7eb2e8f9f7 110 rtc_datetime.u32Hour = timeinfo->tm_hour;
<> 144:ef7eb2e8f9f7 111 rtc_datetime.u32Minute = timeinfo->tm_min;
<> 144:ef7eb2e8f9f7 112 rtc_datetime.u32Second = timeinfo->tm_sec;
<> 144:ef7eb2e8f9f7 113 rtc_datetime.u32TimeScale = RTC_CLOCK_24;
<> 144:ef7eb2e8f9f7 114
<> 144:ef7eb2e8f9f7 115 // NOTE: Timing issue with write to RTC registers. This delay is empirical, not rational.
<> 144:ef7eb2e8f9f7 116 RTC_SetDateAndTime(&rtc_datetime);
<> 144:ef7eb2e8f9f7 117 //nu_nop(6000);
<> 144:ef7eb2e8f9f7 118 wait_us(100);
<> 144:ef7eb2e8f9f7 119 }
<> 144:ef7eb2e8f9f7 120
<> 144:ef7eb2e8f9f7 121 #endif