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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Freescale/TARGET_KLXX/rtc_api.c@111:ae4891ca7084, 2014-03-06 (annotated)

Committer:
mbed_official
Date:
Thu Mar 06 10:00:06 2014 +0000
Revision:
111:ae4891ca7084
Parent:
82:0b31dbcd4769
Child:
587:61103edf8a92
Synchronized with git revision 955bd9a5c9e042f1cf30bbae2a99afaab8eb4cbf



Full URL: https://github.com/mbedmicro/mbed/commit/955bd9a5c9e042f1cf30bbae2a99afaab8eb4cbf/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 82:0b31dbcd4769 1 /* mbed Microcontroller Library
mbed_official 82:0b31dbcd4769 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 82:0b31dbcd4769 3 *
mbed_official 82:0b31dbcd4769 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 82:0b31dbcd4769 5 * you may not use this file except in compliance with the License.
mbed_official 82:0b31dbcd4769 6 * You may obtain a copy of the License at
mbed_official 82:0b31dbcd4769 7 *
mbed_official 82:0b31dbcd4769 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 82:0b31dbcd4769 9 *
mbed_official 82:0b31dbcd4769 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 82:0b31dbcd4769 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 82:0b31dbcd4769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 82:0b31dbcd4769 13 * See the License for the specific language governing permissions and
mbed_official 82:0b31dbcd4769 14 * limitations under the License.
mbed_official 82:0b31dbcd4769 15 */
mbed_official 82:0b31dbcd4769 16 #include "rtc_api.h"
mbed_official 82:0b31dbcd4769 17 #include "PeripheralPins.h"
mbed_official 82:0b31dbcd4769 18
mbed_official 82:0b31dbcd4769 19 static void init(void) {
mbed_official 82:0b31dbcd4769 20 // enable RTC clock
mbed_official 82:0b31dbcd4769 21 SIM->SCGC6 |= SIM_SCGC6_RTC_MASK;
mbed_official 82:0b31dbcd4769 22
mbed_official 82:0b31dbcd4769 23 pinmap_pinout(PinMap_RTC[0].pin, PinMap_RTC); //Map RTC clk input (if not NC)
mbed_official 82:0b31dbcd4769 24
mbed_official 82:0b31dbcd4769 25 // select RTC clock source
mbed_official 82:0b31dbcd4769 26 SIM->SOPT1 &= ~SIM_SOPT1_OSC32KSEL_MASK;
mbed_official 82:0b31dbcd4769 27 SIM->SOPT1 |= SIM_SOPT1_OSC32KSEL(PinMap_RTC[0].peripheral);
mbed_official 82:0b31dbcd4769 28 }
mbed_official 82:0b31dbcd4769 29
mbed_official 82:0b31dbcd4769 30 void rtc_init(void) {
mbed_official 82:0b31dbcd4769 31 init();
mbed_official 82:0b31dbcd4769 32
mbed_official 82:0b31dbcd4769 33 //Configure the TSR. default value: 1
mbed_official 82:0b31dbcd4769 34 RTC->TSR = 1;
mbed_official 82:0b31dbcd4769 35
mbed_official 82:0b31dbcd4769 36 if (PinMap_RTC[0].pin == NC) { //Use OSC32K
mbed_official 82:0b31dbcd4769 37 RTC->CR |= RTC_CR_OSCE_MASK;
mbed_official 82:0b31dbcd4769 38 //delay for OSCE stabilization
mbed_official 82:0b31dbcd4769 39 for(int i=0; i<0x1000; i++) __NOP();
mbed_official 82:0b31dbcd4769 40 }
mbed_official 82:0b31dbcd4769 41
mbed_official 82:0b31dbcd4769 42 // enable counter
mbed_official 82:0b31dbcd4769 43 RTC->SR |= RTC_SR_TCE_MASK;
mbed_official 82:0b31dbcd4769 44 }
mbed_official 82:0b31dbcd4769 45
mbed_official 82:0b31dbcd4769 46 void rtc_free(void) {
mbed_official 82:0b31dbcd4769 47 // [TODO]
mbed_official 82:0b31dbcd4769 48 }
mbed_official 82:0b31dbcd4769 49
mbed_official 82:0b31dbcd4769 50 /*
mbed_official 82:0b31dbcd4769 51 * Little check routine to see if the RTC has been enabled
mbed_official 82:0b31dbcd4769 52 * 0 = Disabled, 1 = Enabled
mbed_official 82:0b31dbcd4769 53 */
mbed_official 82:0b31dbcd4769 54 int rtc_isenabled(void) {
mbed_official 82:0b31dbcd4769 55 // even if the RTC module is enabled,
mbed_official 82:0b31dbcd4769 56 // as we use RTC_CLKIN and an external clock,
mbed_official 82:0b31dbcd4769 57 // we need to reconfigure the pins. That is why we
mbed_official 82:0b31dbcd4769 58 // call init() if the rtc is enabled
mbed_official 82:0b31dbcd4769 59
mbed_official 82:0b31dbcd4769 60 // if RTC not enabled return 0
mbed_official 82:0b31dbcd4769 61 SIM->SCGC5 |= SIM_SCGC5_PORTA_MASK;
mbed_official 82:0b31dbcd4769 62 SIM->SCGC6 |= SIM_SCGC6_RTC_MASK;
mbed_official 82:0b31dbcd4769 63 if ((RTC->SR & RTC_SR_TCE_MASK) == 0)
mbed_official 82:0b31dbcd4769 64 return 0;
mbed_official 82:0b31dbcd4769 65
mbed_official 82:0b31dbcd4769 66 init();
mbed_official 82:0b31dbcd4769 67 return 1;
mbed_official 82:0b31dbcd4769 68 }
mbed_official 82:0b31dbcd4769 69
mbed_official 82:0b31dbcd4769 70 time_t rtc_read(void) {
mbed_official 82:0b31dbcd4769 71 return RTC->TSR;
mbed_official 82:0b31dbcd4769 72 }
mbed_official 82:0b31dbcd4769 73
mbed_official 82:0b31dbcd4769 74 void rtc_write(time_t t) {
mbed_official 82:0b31dbcd4769 75 // disable counter
mbed_official 82:0b31dbcd4769 76 RTC->SR &= ~RTC_SR_TCE_MASK;
mbed_official 82:0b31dbcd4769 77
mbed_official 82:0b31dbcd4769 78 // we do not write 0 into TSR
mbed_official 82:0b31dbcd4769 79 // to avoid invalid time
mbed_official 82:0b31dbcd4769 80 if (t == 0)
mbed_official 82:0b31dbcd4769 81 t = 1;
mbed_official 82:0b31dbcd4769 82
mbed_official 82:0b31dbcd4769 83 // write seconds
mbed_official 82:0b31dbcd4769 84 RTC->TSR = t;
mbed_official 82:0b31dbcd4769 85
mbed_official 82:0b31dbcd4769 86 // re-enable counter
mbed_official 82:0b31dbcd4769 87 RTC->SR |= RTC_SR_TCE_MASK;
mbed_official 82:0b31dbcd4769 88 }