mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_NORDIC/TARGET_NRF5x/lp_ticker.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
188:bcfe06ba3d64 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Anna Bridge 186:707f6e361f3e 1 /* mbed Microcontroller Library
Anna Bridge 186:707f6e361f3e 2 * Copyright (c) 2015 ARM Limited
Anna Bridge 186:707f6e361f3e 3 *
Anna Bridge 186:707f6e361f3e 4 * Licensed under the Apache License, Version 2.0 (the "License");
Anna Bridge 186:707f6e361f3e 5 * you may not use this file except in compliance with the License.
Anna Bridge 186:707f6e361f3e 6 * You may obtain a copy of the License at
Anna Bridge 186:707f6e361f3e 7 *
Anna Bridge 186:707f6e361f3e 8 * http://www.apache.org/licenses/LICENSE-2.0
Anna Bridge 186:707f6e361f3e 9 *
Anna Bridge 186:707f6e361f3e 10 * Unless required by applicable law or agreed to in writing, software
Anna Bridge 186:707f6e361f3e 11 * distributed under the License is distributed on an "AS IS" BASIS,
Anna Bridge 186:707f6e361f3e 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Anna Bridge 186:707f6e361f3e 13 * See the License for the specific language governing permissions and
Anna Bridge 186:707f6e361f3e 14 * limitations under the License.
Anna Bridge 186:707f6e361f3e 15 */
Anna Bridge 186:707f6e361f3e 16 #include "lp_ticker_api.h"
Anna Bridge 186:707f6e361f3e 17 #include "common_rtc.h"
Anna Bridge 186:707f6e361f3e 18 #include "platform/mbed_critical.h"
Anna Bridge 186:707f6e361f3e 19
Anna Bridge 186:707f6e361f3e 20 #if DEVICE_LPTICKER
Anna Bridge 186:707f6e361f3e 21
Anna Bridge 186:707f6e361f3e 22 /* LP ticker is driven by 32kHz clock and counter length is 24 bits. */
Anna Bridge 186:707f6e361f3e 23 const ticker_info_t* lp_ticker_get_info()
Anna Bridge 186:707f6e361f3e 24 {
Anna Bridge 186:707f6e361f3e 25 static const ticker_info_t info = {
Anna Bridge 186:707f6e361f3e 26 RTC_FREQ,
Anna Bridge 186:707f6e361f3e 27 RTC_COUNTER_BITS
Anna Bridge 186:707f6e361f3e 28 };
Anna Bridge 186:707f6e361f3e 29 return &info;
Anna Bridge 186:707f6e361f3e 30 }
Anna Bridge 186:707f6e361f3e 31
Anna Bridge 186:707f6e361f3e 32 void lp_ticker_init(void)
Anna Bridge 186:707f6e361f3e 33 {
Anna Bridge 186:707f6e361f3e 34 common_rtc_init();
Anna Bridge 186:707f6e361f3e 35 }
Anna Bridge 186:707f6e361f3e 36
Anna Bridge 186:707f6e361f3e 37 void lp_ticker_free(void)
Anna Bridge 186:707f6e361f3e 38 {
AnnaBridge 188:bcfe06ba3d64 39 common_rtc_free();
Anna Bridge 186:707f6e361f3e 40 }
Anna Bridge 186:707f6e361f3e 41
Anna Bridge 186:707f6e361f3e 42 uint32_t lp_ticker_read()
Anna Bridge 186:707f6e361f3e 43 {
Anna Bridge 186:707f6e361f3e 44 return nrf_rtc_counter_get(COMMON_RTC_INSTANCE);
Anna Bridge 186:707f6e361f3e 45 }
Anna Bridge 186:707f6e361f3e 46
Anna Bridge 186:707f6e361f3e 47 void lp_ticker_set_interrupt(timestamp_t timestamp)
Anna Bridge 186:707f6e361f3e 48 {
Anna Bridge 186:707f6e361f3e 49 common_rtc_set_interrupt(timestamp,
Anna Bridge 186:707f6e361f3e 50 LP_TICKER_CC_CHANNEL, LP_TICKER_INT_MASK);
Anna Bridge 186:707f6e361f3e 51 }
Anna Bridge 186:707f6e361f3e 52
Anna Bridge 186:707f6e361f3e 53 void lp_ticker_fire_interrupt(void)
Anna Bridge 186:707f6e361f3e 54 {
Anna Bridge 186:707f6e361f3e 55 core_util_critical_section_enter();
Anna Bridge 186:707f6e361f3e 56
Anna Bridge 186:707f6e361f3e 57 lp_ticker_interrupt_fire = true;
Anna Bridge 186:707f6e361f3e 58
Anna Bridge 186:707f6e361f3e 59 NVIC_SetPendingIRQ(RTC1_IRQn);
Anna Bridge 186:707f6e361f3e 60
Anna Bridge 186:707f6e361f3e 61 core_util_critical_section_exit();
Anna Bridge 186:707f6e361f3e 62 }
Anna Bridge 186:707f6e361f3e 63
Anna Bridge 186:707f6e361f3e 64 void lp_ticker_disable_interrupt(void)
Anna Bridge 186:707f6e361f3e 65 {
Anna Bridge 186:707f6e361f3e 66 nrf_rtc_int_disable(COMMON_RTC_INSTANCE, LP_TICKER_INT_MASK);
Anna Bridge 186:707f6e361f3e 67 }
Anna Bridge 186:707f6e361f3e 68
Anna Bridge 186:707f6e361f3e 69 void lp_ticker_clear_interrupt(void)
Anna Bridge 186:707f6e361f3e 70 {
Anna Bridge 186:707f6e361f3e 71 nrf_rtc_event_clear(COMMON_RTC_INSTANCE, LP_TICKER_EVENT);
Anna Bridge 186:707f6e361f3e 72 }
Anna Bridge 186:707f6e361f3e 73
Anna Bridge 186:707f6e361f3e 74 #endif // DEVICE_LPTICKER