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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

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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_Atmel/TARGET_SAM21/rtc_api.c@592:a274ee790e56, 2015-07-17 (annotated)

Committer:
mbed_official
Date:
Fri Jul 17 09:15:10 2015 +0100
Revision:
592:a274ee790e56
Synchronized with git revision e7144f83a8d75df80c4877936b6ffe552b0be9e6



Full URL: https://github.com/mbedmicro/mbed/commit/e7144f83a8d75df80c4877936b6ffe552b0be9e6/



More API implementation for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 592:a274ee790e56 1 /* mbed Microcontroller Library
mbed_official 592:a274ee790e56 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 592:a274ee790e56 3 *
mbed_official 592:a274ee790e56 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 592:a274ee790e56 5 * you may not use this file except in compliance with the License.
mbed_official 592:a274ee790e56 6 * You may obtain a copy of the License at
mbed_official 592:a274ee790e56 7 *
mbed_official 592:a274ee790e56 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 592:a274ee790e56 9 *
mbed_official 592:a274ee790e56 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 592:a274ee790e56 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 592:a274ee790e56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 592:a274ee790e56 13 * See the License for the specific language governing permissions and
mbed_official 592:a274ee790e56 14 * limitations under the License.
mbed_official 592:a274ee790e56 15 */
mbed_official 592:a274ee790e56 16 #include "mbed_assert.h"
mbed_official 592:a274ee790e56 17 #include "rtc_api.h"
mbed_official 592:a274ee790e56 18
mbed_official 592:a274ee790e56 19 #include <math.h>
mbed_official 592:a274ee790e56 20
mbed_official 592:a274ee790e56 21 #include "cmsis.h"
mbed_official 592:a274ee790e56 22 #include "system.h"
mbed_official 592:a274ee790e56 23
mbed_official 592:a274ee790e56 24 #include "rtc_count.h"
mbed_official 592:a274ee790e56 25
mbed_official 592:a274ee790e56 26 /* Global RTC instance*/
mbed_official 592:a274ee790e56 27 static struct rtc_module rtc_instance;
mbed_official 592:a274ee790e56 28
mbed_official 592:a274ee790e56 29 static int rtc_inited = 0;
mbed_official 592:a274ee790e56 30
mbed_official 592:a274ee790e56 31 /* Extern variables */
mbed_official 592:a274ee790e56 32 extern uint8_t g_sys_init;
mbed_official 592:a274ee790e56 33
mbed_official 592:a274ee790e56 34 /** Initialize the RTC
mbed_official 592:a274ee790e56 35 *
mbed_official 592:a274ee790e56 36 * Initialize the RTC with default time
mbed_official 592:a274ee790e56 37 * @param[void] void
mbed_official 592:a274ee790e56 38 */
mbed_official 592:a274ee790e56 39 void rtc_init(void)
mbed_official 592:a274ee790e56 40 {
mbed_official 592:a274ee790e56 41 if (g_sys_init == 0) {
mbed_official 592:a274ee790e56 42 system_init();
mbed_official 592:a274ee790e56 43 g_sys_init = 1;
mbed_official 592:a274ee790e56 44 }
mbed_official 592:a274ee790e56 45
mbed_official 592:a274ee790e56 46 struct rtc_count_config config_rtc_count;
mbed_official 592:a274ee790e56 47
mbed_official 592:a274ee790e56 48 rtc_count_get_config_defaults(&config_rtc_count);
mbed_official 592:a274ee790e56 49
mbed_official 592:a274ee790e56 50 config_rtc_count.prescaler = RTC_COUNT_PRESCALER_DIV_1024;
mbed_official 592:a274ee790e56 51 config_rtc_count.mode = RTC_COUNT_MODE_32BIT;
mbed_official 592:a274ee790e56 52 #ifdef FEATURE_RTC_CONTINUOUSLY_UPDATED
mbed_official 592:a274ee790e56 53 config_rtc_count.continuously_update = true;
mbed_official 592:a274ee790e56 54 #endif
mbed_official 592:a274ee790e56 55
mbed_official 592:a274ee790e56 56 rtc_count_init(&rtc_instance, RTC, &config_rtc_count);
mbed_official 592:a274ee790e56 57
mbed_official 592:a274ee790e56 58 rtc_count_enable(&rtc_instance);
mbed_official 592:a274ee790e56 59 rtc_inited = 1;
mbed_official 592:a274ee790e56 60 }
mbed_official 592:a274ee790e56 61
mbed_official 592:a274ee790e56 62 /** Frees the RTC
mbed_official 592:a274ee790e56 63 *
mbed_official 592:a274ee790e56 64 * @param[void] void
mbed_official 592:a274ee790e56 65 */
mbed_official 592:a274ee790e56 66 void rtc_free(void)
mbed_official 592:a274ee790e56 67 {
mbed_official 592:a274ee790e56 68 if (rtc_inited) {
mbed_official 592:a274ee790e56 69 /* Disable the RTC module */
mbed_official 592:a274ee790e56 70 rtc_count_disable(&rtc_instance);
mbed_official 592:a274ee790e56 71 /* Disable the RTC clock */
mbed_official 592:a274ee790e56 72 system_gclk_chan_disable(RTC_GCLK_ID);
mbed_official 592:a274ee790e56 73 rtc_inited = 0;
mbed_official 592:a274ee790e56 74 }
mbed_official 592:a274ee790e56 75 }
mbed_official 592:a274ee790e56 76
mbed_official 592:a274ee790e56 77 /** Checks whether RTC is enabled or not
mbed_official 592:a274ee790e56 78 *
mbed_official 592:a274ee790e56 79 * To check whether RTC module is enabled or not
mbed_official 592:a274ee790e56 80 * @param[void] void
mbed_official 592:a274ee790e56 81 * @return Non zero if RTC is already enabled, else zero
mbed_official 592:a274ee790e56 82 */
mbed_official 592:a274ee790e56 83 int rtc_isenabled(void)
mbed_official 592:a274ee790e56 84 {
mbed_official 592:a274ee790e56 85 return rtc_inited;
mbed_official 592:a274ee790e56 86 }
mbed_official 592:a274ee790e56 87
mbed_official 592:a274ee790e56 88 /** Reads the RTC value
mbed_official 592:a274ee790e56 89 *
mbed_official 592:a274ee790e56 90 * Reads and return the current time in RTC
mbed_official 592:a274ee790e56 91 * @param[void] void
mbed_official 592:a274ee790e56 92 * @return the current value in RTC
mbed_official 592:a274ee790e56 93 */
mbed_official 592:a274ee790e56 94 time_t rtc_read(void)
mbed_official 592:a274ee790e56 95 {
mbed_official 592:a274ee790e56 96 if (!rtc_inited) {
mbed_official 592:a274ee790e56 97 /* Return invalid time for now! */
mbed_official 592:a274ee790e56 98 return 0;
mbed_official 592:a274ee790e56 99 }
mbed_official 592:a274ee790e56 100 return (time_t)rtc_count_get_count(&rtc_instance);
mbed_official 592:a274ee790e56 101 }
mbed_official 592:a274ee790e56 102
mbed_official 592:a274ee790e56 103 /** Write the RTC value
mbed_official 592:a274ee790e56 104 *
mbed_official 592:a274ee790e56 105 * Update the time value in RTC
mbed_official 592:a274ee790e56 106 * @param[in] t The time value to be written
mbed_official 592:a274ee790e56 107 * @return void
mbed_official 592:a274ee790e56 108 */
mbed_official 592:a274ee790e56 109 void rtc_write(time_t t)
mbed_official 592:a274ee790e56 110 {
mbed_official 592:a274ee790e56 111 if (!rtc_inited) {
mbed_official 592:a274ee790e56 112 /* Initialize the RTC is not yet initialized */
mbed_official 592:a274ee790e56 113 rtc_init();
mbed_official 592:a274ee790e56 114 }
mbed_official 592:a274ee790e56 115
mbed_official 592:a274ee790e56 116 uint32_t count_value = (uint32_t)t;
mbed_official 592:a274ee790e56 117 rtc_count_set_count(&rtc_instance, count_value);
mbed_official 592:a274ee790e56 118 }