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targets/hal/TARGET_Freescale/TARGET_KLXX/rtc_api.c@395:bfce16e86ea4, 2014-11-10 (annotated)

Committer:: mbed_official
Date:: Mon Nov 10 07:45:06 2014 +0000
Revision:: 395:bfce16e86ea4
Parent:: 82:0b31dbcd4769
Child:: 587:61103edf8a92

Synchronized with git revision 8adfd82aa1bf8859ec08537ee7bcd4aaaec1769b

Full URL: https://github.com/mbedmicro/mbed/commit/8adfd82aa1bf8859ec08537ee7bcd4aaaec1769b/

Targets: LPC176X - Add repeater pinmode

Who changed what in which revision?

User	Revision	Line number	New 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	}