EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

targets/TARGET_NXP/TARGET_LPC15XX/rtc_api.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 * Copyright (c) 2006-2013 ARM Limited
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * Licensed under the Apache License, Version 2.0 (the "License");
be_bryan 0:b74591d5ab33 5 * you may not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 6 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 7 *
be_bryan 0:b74591d5ab33 8 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 9 *
be_bryan 0:b74591d5ab33 10 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 11 * distributed under the License is distributed on an "AS IS" BASIS,
be_bryan 0:b74591d5ab33 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 13 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 14 * limitations under the License.
be_bryan 0:b74591d5ab33 15 */
be_bryan 0:b74591d5ab33 16 #include "rtc_api.h"
be_bryan 0:b74591d5ab33 17
be_bryan 0:b74591d5ab33 18 #if DEVICE_RTC
be_bryan 0:b74591d5ab33 19
be_bryan 0:b74591d5ab33 20 void rtc_init(void)
be_bryan 0:b74591d5ab33 21 {
be_bryan 0:b74591d5ab33 22 // Enables clock for RTC
be_bryan 0:b74591d5ab33 23 LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 23);
be_bryan 0:b74591d5ab33 24
be_bryan 0:b74591d5ab33 25 // Software reset
be_bryan 0:b74591d5ab33 26 LPC_RTC->CTRL |= 1;
be_bryan 0:b74591d5ab33 27
be_bryan 0:b74591d5ab33 28 LPC_RTC->COUNT = 0;
be_bryan 0:b74591d5ab33 29
be_bryan 0:b74591d5ab33 30 // Enabled RTC
be_bryan 0:b74591d5ab33 31 LPC_RTC->CTRL |= (1 << 7);
be_bryan 0:b74591d5ab33 32 // clear reset
be_bryan 0:b74591d5ab33 33 LPC_RTC->CTRL &= ~1;
be_bryan 0:b74591d5ab33 34 }
be_bryan 0:b74591d5ab33 35
be_bryan 0:b74591d5ab33 36 void rtc_free(void)
be_bryan 0:b74591d5ab33 37 {
be_bryan 0:b74591d5ab33 38 LPC_SYSCON->SYSAHBCLKCTRL0 &= ~(1 << 23);
be_bryan 0:b74591d5ab33 39 LPC_RTC->CTRL &= ~(1 << 7);
be_bryan 0:b74591d5ab33 40 }
be_bryan 0:b74591d5ab33 41
be_bryan 0:b74591d5ab33 42 int rtc_isenabled(void)
be_bryan 0:b74591d5ab33 43 {
be_bryan 0:b74591d5ab33 44 return (((LPC_RTC->CTRL) & 0x80) != 0);
be_bryan 0:b74591d5ab33 45 }
be_bryan 0:b74591d5ab33 46
be_bryan 0:b74591d5ab33 47 time_t rtc_read(void)
be_bryan 0:b74591d5ab33 48 {
be_bryan 0:b74591d5ab33 49 return (time_t)LPC_RTC->COUNT;
be_bryan 0:b74591d5ab33 50 }
be_bryan 0:b74591d5ab33 51
be_bryan 0:b74591d5ab33 52 void rtc_write(time_t t)
be_bryan 0:b74591d5ab33 53 {
be_bryan 0:b74591d5ab33 54 // Disabled RTC
be_bryan 0:b74591d5ab33 55 LPC_RTC->CTRL &= ~(1 << 7);
be_bryan 0:b74591d5ab33 56
be_bryan 0:b74591d5ab33 57 // Set count
be_bryan 0:b74591d5ab33 58 LPC_RTC->COUNT = t;
be_bryan 0:b74591d5ab33 59
be_bryan 0:b74591d5ab33 60 //Enabled RTC
be_bryan 0:b74591d5ab33 61 LPC_RTC->CTRL |= (1 << 7);
be_bryan 0:b74591d5ab33 62 }
be_bryan 0:b74591d5ab33 63
be_bryan 0:b74591d5ab33 64 #endif