mbed library sources
Fork of mbed-src by
Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/rtc_api.c
- Revision:
- 613:bc40b8d2aec4
- Parent:
- 612:fba1c7dc54c0
- Child:
- 614:9d86c2ae5de0
--- a/targets/hal/TARGET_Atmel/TARGET_SAM21/rtc_api.c Tue Aug 18 15:00:09 2015 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,118 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include "mbed_assert.h" -#include "rtc_api.h" - -#include <math.h> - -#include "cmsis.h" -#include "system.h" - -#include "rtc_count.h" - -/* Global RTC instance*/ -static struct rtc_module rtc_instance; - -static int rtc_inited = 0; - -/* Extern variables */ -extern uint8_t g_sys_init; - -/** Initialize the RTC - * - * Initialize the RTC with default time - * @param[void] void - */ -void rtc_init(void) -{ - if (g_sys_init == 0) { - system_init(); - g_sys_init = 1; - } - - struct rtc_count_config config_rtc_count; - - rtc_count_get_config_defaults(&config_rtc_count); - - config_rtc_count.prescaler = RTC_COUNT_PRESCALER_DIV_1024; - config_rtc_count.mode = RTC_COUNT_MODE_32BIT; -#ifdef FEATURE_RTC_CONTINUOUSLY_UPDATED - config_rtc_count.continuously_update = true; -#endif - - rtc_count_init(&rtc_instance, RTC, &config_rtc_count); - - rtc_count_enable(&rtc_instance); - rtc_inited = 1; -} - -/** Frees the RTC - * - * @param[void] void - */ -void rtc_free(void) -{ - if (rtc_inited) { - /* Disable the RTC module */ - rtc_count_disable(&rtc_instance); - /* Disable the RTC clock */ - system_gclk_chan_disable(RTC_GCLK_ID); - rtc_inited = 0; - } -} - -/** Checks whether RTC is enabled or not - * - * To check whether RTC module is enabled or not - * @param[void] void - * @return Non zero if RTC is already enabled, else zero - */ -int rtc_isenabled(void) -{ - return rtc_inited; -} - -/** Reads the RTC value - * - * Reads and return the current time in RTC - * @param[void] void - * @return the current value in RTC - */ -time_t rtc_read(void) -{ - if (!rtc_inited) { - /* Return invalid time for now! */ - return 0; - } - return (time_t)rtc_count_get_count(&rtc_instance); -} - -/** Write the RTC value - * - * Update the time value in RTC - * @param[in] t The time value to be written - * @return void - */ -void rtc_write(time_t t) -{ - if (!rtc_inited) { - /* Initialize the RTC is not yet initialized */ - rtc_init(); - } - - uint32_t count_value = (uint32_t)t; - rtc_count_set_count(&rtc_instance, count_value); -} \ No newline at end of file