RTC auf true
hal/LowPowerTickerWrapper.cpp@0:38ceb79fef03, 2018-11-28 (annotated)
- Committer:
- kevman
- Date:
- Wed Nov 28 15:10:15 2018 +0000
- Revision:
- 0:38ceb79fef03
RTC modified
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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kevman | 0:38ceb79fef03 | 1 | /* mbed Microcontroller Library |
kevman | 0:38ceb79fef03 | 2 | * Copyright (c) 2018 ARM Limited |
kevman | 0:38ceb79fef03 | 3 | * |
kevman | 0:38ceb79fef03 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
kevman | 0:38ceb79fef03 | 5 | * you may not use this file except in compliance with the License. |
kevman | 0:38ceb79fef03 | 6 | * You may obtain a copy of the License at |
kevman | 0:38ceb79fef03 | 7 | * |
kevman | 0:38ceb79fef03 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
kevman | 0:38ceb79fef03 | 9 | * |
kevman | 0:38ceb79fef03 | 10 | * Unless required by applicable law or agreed to in writing, software |
kevman | 0:38ceb79fef03 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
kevman | 0:38ceb79fef03 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
kevman | 0:38ceb79fef03 | 13 | * See the License for the specific language governing permissions and |
kevman | 0:38ceb79fef03 | 14 | * limitations under the License. |
kevman | 0:38ceb79fef03 | 15 | */ |
kevman | 0:38ceb79fef03 | 16 | #include "hal/LowPowerTickerWrapper.h" |
kevman | 0:38ceb79fef03 | 17 | #include "platform/Callback.h" |
kevman | 0:38ceb79fef03 | 18 | |
kevman | 0:38ceb79fef03 | 19 | LowPowerTickerWrapper::LowPowerTickerWrapper(const ticker_data_t *data, const ticker_interface_t *interface, uint32_t min_cycles_between_writes, uint32_t min_cycles_until_match) |
kevman | 0:38ceb79fef03 | 20 | : _intf(data->interface), _min_count_between_writes(min_cycles_between_writes + 1), _min_count_until_match(min_cycles_until_match + 1), _suspended(false) |
kevman | 0:38ceb79fef03 | 21 | { |
kevman | 0:38ceb79fef03 | 22 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 23 | |
kevman | 0:38ceb79fef03 | 24 | this->data.interface = interface; |
kevman | 0:38ceb79fef03 | 25 | this->data.queue = data->queue; |
kevman | 0:38ceb79fef03 | 26 | _reset(); |
kevman | 0:38ceb79fef03 | 27 | |
kevman | 0:38ceb79fef03 | 28 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 29 | } |
kevman | 0:38ceb79fef03 | 30 | |
kevman | 0:38ceb79fef03 | 31 | void LowPowerTickerWrapper::irq_handler(ticker_irq_handler_type handler) |
kevman | 0:38ceb79fef03 | 32 | { |
kevman | 0:38ceb79fef03 | 33 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 34 | |
kevman | 0:38ceb79fef03 | 35 | if (_pending_fire_now || _match_check(_intf->read()) || _suspended) { |
kevman | 0:38ceb79fef03 | 36 | _timeout.detach(); |
kevman | 0:38ceb79fef03 | 37 | _pending_timeout = false; |
kevman | 0:38ceb79fef03 | 38 | _pending_match = false; |
kevman | 0:38ceb79fef03 | 39 | _pending_fire_now = false; |
kevman | 0:38ceb79fef03 | 40 | if (handler) { |
kevman | 0:38ceb79fef03 | 41 | handler(&data); |
kevman | 0:38ceb79fef03 | 42 | } |
kevman | 0:38ceb79fef03 | 43 | } else { |
kevman | 0:38ceb79fef03 | 44 | // Spurious interrupt |
kevman | 0:38ceb79fef03 | 45 | _intf->clear_interrupt(); |
kevman | 0:38ceb79fef03 | 46 | } |
kevman | 0:38ceb79fef03 | 47 | |
kevman | 0:38ceb79fef03 | 48 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 49 | } |
kevman | 0:38ceb79fef03 | 50 | |
kevman | 0:38ceb79fef03 | 51 | void LowPowerTickerWrapper::suspend() |
kevman | 0:38ceb79fef03 | 52 | { |
kevman | 0:38ceb79fef03 | 53 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 54 | |
kevman | 0:38ceb79fef03 | 55 | // Wait until rescheduling is allowed |
kevman | 0:38ceb79fef03 | 56 | while (!_set_interrupt_allowed) { |
kevman | 0:38ceb79fef03 | 57 | timestamp_t current = _intf->read(); |
kevman | 0:38ceb79fef03 | 58 | if (((current - _last_actual_set_interrupt) & _mask) >= _min_count_between_writes) { |
kevman | 0:38ceb79fef03 | 59 | _set_interrupt_allowed = true; |
kevman | 0:38ceb79fef03 | 60 | } |
kevman | 0:38ceb79fef03 | 61 | } |
kevman | 0:38ceb79fef03 | 62 | |
kevman | 0:38ceb79fef03 | 63 | _reset(); |
kevman | 0:38ceb79fef03 | 64 | _suspended = true; |
kevman | 0:38ceb79fef03 | 65 | |
kevman | 0:38ceb79fef03 | 66 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 67 | } |
kevman | 0:38ceb79fef03 | 68 | |
kevman | 0:38ceb79fef03 | 69 | void LowPowerTickerWrapper::resume() |
kevman | 0:38ceb79fef03 | 70 | { |
kevman | 0:38ceb79fef03 | 71 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 72 | |
kevman | 0:38ceb79fef03 | 73 | // Wait until rescheduling is allowed |
kevman | 0:38ceb79fef03 | 74 | while (!_set_interrupt_allowed) { |
kevman | 0:38ceb79fef03 | 75 | timestamp_t current = _intf->read(); |
kevman | 0:38ceb79fef03 | 76 | if (((current - _last_actual_set_interrupt) & _mask) >= _min_count_between_writes) { |
kevman | 0:38ceb79fef03 | 77 | _set_interrupt_allowed = true; |
kevman | 0:38ceb79fef03 | 78 | } |
kevman | 0:38ceb79fef03 | 79 | } |
kevman | 0:38ceb79fef03 | 80 | |
kevman | 0:38ceb79fef03 | 81 | _suspended = false; |
kevman | 0:38ceb79fef03 | 82 | |
kevman | 0:38ceb79fef03 | 83 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 84 | } |
kevman | 0:38ceb79fef03 | 85 | |
kevman | 0:38ceb79fef03 | 86 | bool LowPowerTickerWrapper::timeout_pending() |
kevman | 0:38ceb79fef03 | 87 | { |
kevman | 0:38ceb79fef03 | 88 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 89 | |
kevman | 0:38ceb79fef03 | 90 | bool pending = _pending_timeout; |
kevman | 0:38ceb79fef03 | 91 | |
kevman | 0:38ceb79fef03 | 92 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 93 | return pending; |
kevman | 0:38ceb79fef03 | 94 | } |
kevman | 0:38ceb79fef03 | 95 | |
kevman | 0:38ceb79fef03 | 96 | void LowPowerTickerWrapper::init() |
kevman | 0:38ceb79fef03 | 97 | { |
kevman | 0:38ceb79fef03 | 98 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 99 | |
kevman | 0:38ceb79fef03 | 100 | _reset(); |
kevman | 0:38ceb79fef03 | 101 | _intf->init(); |
kevman | 0:38ceb79fef03 | 102 | |
kevman | 0:38ceb79fef03 | 103 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 104 | } |
kevman | 0:38ceb79fef03 | 105 | |
kevman | 0:38ceb79fef03 | 106 | void LowPowerTickerWrapper::free() |
kevman | 0:38ceb79fef03 | 107 | { |
kevman | 0:38ceb79fef03 | 108 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 109 | |
kevman | 0:38ceb79fef03 | 110 | _reset(); |
kevman | 0:38ceb79fef03 | 111 | _intf->free(); |
kevman | 0:38ceb79fef03 | 112 | |
kevman | 0:38ceb79fef03 | 113 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 114 | } |
kevman | 0:38ceb79fef03 | 115 | |
kevman | 0:38ceb79fef03 | 116 | uint32_t LowPowerTickerWrapper::read() |
kevman | 0:38ceb79fef03 | 117 | { |
kevman | 0:38ceb79fef03 | 118 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 119 | |
kevman | 0:38ceb79fef03 | 120 | timestamp_t current = _intf->read(); |
kevman | 0:38ceb79fef03 | 121 | if (!_suspended && _match_check(current)) { |
kevman | 0:38ceb79fef03 | 122 | _intf->fire_interrupt(); |
kevman | 0:38ceb79fef03 | 123 | } |
kevman | 0:38ceb79fef03 | 124 | |
kevman | 0:38ceb79fef03 | 125 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 126 | return current; |
kevman | 0:38ceb79fef03 | 127 | } |
kevman | 0:38ceb79fef03 | 128 | |
kevman | 0:38ceb79fef03 | 129 | void LowPowerTickerWrapper::set_interrupt(timestamp_t timestamp) |
kevman | 0:38ceb79fef03 | 130 | { |
kevman | 0:38ceb79fef03 | 131 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 132 | |
kevman | 0:38ceb79fef03 | 133 | _last_set_interrupt = _intf->read(); |
kevman | 0:38ceb79fef03 | 134 | _cur_match_time = timestamp; |
kevman | 0:38ceb79fef03 | 135 | _pending_match = true; |
kevman | 0:38ceb79fef03 | 136 | if (!_suspended) { |
kevman | 0:38ceb79fef03 | 137 | _schedule_match(_last_set_interrupt); |
kevman | 0:38ceb79fef03 | 138 | } else { |
kevman | 0:38ceb79fef03 | 139 | _intf->set_interrupt(timestamp); |
kevman | 0:38ceb79fef03 | 140 | _last_actual_set_interrupt = _last_set_interrupt; |
kevman | 0:38ceb79fef03 | 141 | _set_interrupt_allowed = false; |
kevman | 0:38ceb79fef03 | 142 | } |
kevman | 0:38ceb79fef03 | 143 | |
kevman | 0:38ceb79fef03 | 144 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 145 | } |
kevman | 0:38ceb79fef03 | 146 | |
kevman | 0:38ceb79fef03 | 147 | void LowPowerTickerWrapper::disable_interrupt() |
kevman | 0:38ceb79fef03 | 148 | { |
kevman | 0:38ceb79fef03 | 149 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 150 | |
kevman | 0:38ceb79fef03 | 151 | _intf->disable_interrupt(); |
kevman | 0:38ceb79fef03 | 152 | |
kevman | 0:38ceb79fef03 | 153 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 154 | } |
kevman | 0:38ceb79fef03 | 155 | |
kevman | 0:38ceb79fef03 | 156 | void LowPowerTickerWrapper::clear_interrupt() |
kevman | 0:38ceb79fef03 | 157 | { |
kevman | 0:38ceb79fef03 | 158 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 159 | |
kevman | 0:38ceb79fef03 | 160 | _intf->clear_interrupt(); |
kevman | 0:38ceb79fef03 | 161 | |
kevman | 0:38ceb79fef03 | 162 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 163 | } |
kevman | 0:38ceb79fef03 | 164 | |
kevman | 0:38ceb79fef03 | 165 | void LowPowerTickerWrapper::fire_interrupt() |
kevman | 0:38ceb79fef03 | 166 | { |
kevman | 0:38ceb79fef03 | 167 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 168 | |
kevman | 0:38ceb79fef03 | 169 | _pending_fire_now = 1; |
kevman | 0:38ceb79fef03 | 170 | _intf->fire_interrupt(); |
kevman | 0:38ceb79fef03 | 171 | |
kevman | 0:38ceb79fef03 | 172 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 173 | } |
kevman | 0:38ceb79fef03 | 174 | |
kevman | 0:38ceb79fef03 | 175 | const ticker_info_t *LowPowerTickerWrapper::get_info() |
kevman | 0:38ceb79fef03 | 176 | { |
kevman | 0:38ceb79fef03 | 177 | |
kevman | 0:38ceb79fef03 | 178 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 179 | |
kevman | 0:38ceb79fef03 | 180 | const ticker_info_t *info = _intf->get_info(); |
kevman | 0:38ceb79fef03 | 181 | |
kevman | 0:38ceb79fef03 | 182 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 183 | return info; |
kevman | 0:38ceb79fef03 | 184 | } |
kevman | 0:38ceb79fef03 | 185 | |
kevman | 0:38ceb79fef03 | 186 | void LowPowerTickerWrapper::_reset() |
kevman | 0:38ceb79fef03 | 187 | { |
kevman | 0:38ceb79fef03 | 188 | MBED_ASSERT(core_util_in_critical_section()); |
kevman | 0:38ceb79fef03 | 189 | |
kevman | 0:38ceb79fef03 | 190 | _timeout.detach(); |
kevman | 0:38ceb79fef03 | 191 | _pending_timeout = false; |
kevman | 0:38ceb79fef03 | 192 | _pending_match = false; |
kevman | 0:38ceb79fef03 | 193 | _pending_fire_now = false; |
kevman | 0:38ceb79fef03 | 194 | _set_interrupt_allowed = true; |
kevman | 0:38ceb79fef03 | 195 | _cur_match_time = 0; |
kevman | 0:38ceb79fef03 | 196 | _last_set_interrupt = 0; |
kevman | 0:38ceb79fef03 | 197 | _last_actual_set_interrupt = 0; |
kevman | 0:38ceb79fef03 | 198 | |
kevman | 0:38ceb79fef03 | 199 | const ticker_info_t *info = _intf->get_info(); |
kevman | 0:38ceb79fef03 | 200 | if (info->bits >= 32) { |
kevman | 0:38ceb79fef03 | 201 | _mask = 0xffffffff; |
kevman | 0:38ceb79fef03 | 202 | } else { |
kevman | 0:38ceb79fef03 | 203 | _mask = ((uint64_t)1 << info->bits) - 1; |
kevman | 0:38ceb79fef03 | 204 | } |
kevman | 0:38ceb79fef03 | 205 | |
kevman | 0:38ceb79fef03 | 206 | // Round us_per_tick up |
kevman | 0:38ceb79fef03 | 207 | _us_per_tick = (1000000 + info->frequency - 1) / info->frequency; |
kevman | 0:38ceb79fef03 | 208 | } |
kevman | 0:38ceb79fef03 | 209 | |
kevman | 0:38ceb79fef03 | 210 | void LowPowerTickerWrapper::_timeout_handler() |
kevman | 0:38ceb79fef03 | 211 | { |
kevman | 0:38ceb79fef03 | 212 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 213 | _pending_timeout = false; |
kevman | 0:38ceb79fef03 | 214 | |
kevman | 0:38ceb79fef03 | 215 | timestamp_t current = _intf->read(); |
kevman | 0:38ceb79fef03 | 216 | /* Add extra check for '_last_set_interrupt == _cur_match_time' |
kevman | 0:38ceb79fef03 | 217 | * |
kevman | 0:38ceb79fef03 | 218 | * When '_last_set_interrupt == _cur_match_time', _ticker_match_interval_passed sees it as |
kevman | 0:38ceb79fef03 | 219 | * one-round interval rather than just-pass, so add extra check for it. In rare cases, we |
kevman | 0:38ceb79fef03 | 220 | * may trap in _timeout_handler/_schedule_match loop. This check can break it. |
kevman | 0:38ceb79fef03 | 221 | */ |
kevman | 0:38ceb79fef03 | 222 | if ((_last_set_interrupt == _cur_match_time) || |
kevman | 0:38ceb79fef03 | 223 | _ticker_match_interval_passed(_last_set_interrupt, current, _cur_match_time)) { |
kevman | 0:38ceb79fef03 | 224 | _intf->fire_interrupt(); |
kevman | 0:38ceb79fef03 | 225 | } else { |
kevman | 0:38ceb79fef03 | 226 | _schedule_match(current); |
kevman | 0:38ceb79fef03 | 227 | } |
kevman | 0:38ceb79fef03 | 228 | |
kevman | 0:38ceb79fef03 | 229 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 230 | } |
kevman | 0:38ceb79fef03 | 231 | |
kevman | 0:38ceb79fef03 | 232 | bool LowPowerTickerWrapper::_match_check(timestamp_t current) |
kevman | 0:38ceb79fef03 | 233 | { |
kevman | 0:38ceb79fef03 | 234 | MBED_ASSERT(core_util_in_critical_section()); |
kevman | 0:38ceb79fef03 | 235 | |
kevman | 0:38ceb79fef03 | 236 | if (!_pending_match) { |
kevman | 0:38ceb79fef03 | 237 | return false; |
kevman | 0:38ceb79fef03 | 238 | } |
kevman | 0:38ceb79fef03 | 239 | /* Add extra check for '_last_set_interrupt == _cur_match_time' as above */ |
kevman | 0:38ceb79fef03 | 240 | return (_last_set_interrupt == _cur_match_time) || |
kevman | 0:38ceb79fef03 | 241 | _ticker_match_interval_passed(_last_set_interrupt, current, _cur_match_time); |
kevman | 0:38ceb79fef03 | 242 | } |
kevman | 0:38ceb79fef03 | 243 | |
kevman | 0:38ceb79fef03 | 244 | uint32_t LowPowerTickerWrapper::_lp_ticks_to_us(uint32_t ticks) |
kevman | 0:38ceb79fef03 | 245 | { |
kevman | 0:38ceb79fef03 | 246 | MBED_ASSERT(core_util_in_critical_section()); |
kevman | 0:38ceb79fef03 | 247 | |
kevman | 0:38ceb79fef03 | 248 | // Add 4 microseconds to round up the micro second ticker time (which has a frequency of at least 250KHz - 4us period) |
kevman | 0:38ceb79fef03 | 249 | return _us_per_tick * ticks + 4; |
kevman | 0:38ceb79fef03 | 250 | } |
kevman | 0:38ceb79fef03 | 251 | |
kevman | 0:38ceb79fef03 | 252 | void LowPowerTickerWrapper::_schedule_match(timestamp_t current) |
kevman | 0:38ceb79fef03 | 253 | { |
kevman | 0:38ceb79fef03 | 254 | MBED_ASSERT(core_util_in_critical_section()); |
kevman | 0:38ceb79fef03 | 255 | |
kevman | 0:38ceb79fef03 | 256 | // Check if _intf->set_interrupt is allowed |
kevman | 0:38ceb79fef03 | 257 | if (!_set_interrupt_allowed) { |
kevman | 0:38ceb79fef03 | 258 | if (((current - _last_actual_set_interrupt) & _mask) >= _min_count_between_writes) { |
kevman | 0:38ceb79fef03 | 259 | _set_interrupt_allowed = true; |
kevman | 0:38ceb79fef03 | 260 | } |
kevman | 0:38ceb79fef03 | 261 | } |
kevman | 0:38ceb79fef03 | 262 | |
kevman | 0:38ceb79fef03 | 263 | uint32_t cycles_until_match = (_cur_match_time - current) & _mask; |
kevman | 0:38ceb79fef03 | 264 | bool too_close = cycles_until_match < _min_count_until_match; |
kevman | 0:38ceb79fef03 | 265 | |
kevman | 0:38ceb79fef03 | 266 | if (!_set_interrupt_allowed) { |
kevman | 0:38ceb79fef03 | 267 | |
kevman | 0:38ceb79fef03 | 268 | // Can't use _intf->set_interrupt so use microsecond Timeout instead |
kevman | 0:38ceb79fef03 | 269 | |
kevman | 0:38ceb79fef03 | 270 | // Speed optimization - if a timer has already been scheduled |
kevman | 0:38ceb79fef03 | 271 | // then don't schedule it again. |
kevman | 0:38ceb79fef03 | 272 | if (!_pending_timeout) { |
kevman | 0:38ceb79fef03 | 273 | uint32_t ticks = cycles_until_match < _min_count_until_match ? cycles_until_match : _min_count_until_match; |
kevman | 0:38ceb79fef03 | 274 | _timeout.attach_us(mbed::callback(this, &LowPowerTickerWrapper::_timeout_handler), _lp_ticks_to_us(ticks)); |
kevman | 0:38ceb79fef03 | 275 | _pending_timeout = true; |
kevman | 0:38ceb79fef03 | 276 | } |
kevman | 0:38ceb79fef03 | 277 | return; |
kevman | 0:38ceb79fef03 | 278 | } |
kevman | 0:38ceb79fef03 | 279 | |
kevman | 0:38ceb79fef03 | 280 | if (!too_close) { |
kevman | 0:38ceb79fef03 | 281 | |
kevman | 0:38ceb79fef03 | 282 | // Schedule LP ticker |
kevman | 0:38ceb79fef03 | 283 | _intf->set_interrupt(_cur_match_time); |
kevman | 0:38ceb79fef03 | 284 | current = _intf->read(); |
kevman | 0:38ceb79fef03 | 285 | _last_actual_set_interrupt = current; |
kevman | 0:38ceb79fef03 | 286 | _set_interrupt_allowed = false; |
kevman | 0:38ceb79fef03 | 287 | |
kevman | 0:38ceb79fef03 | 288 | // Check for overflow |
kevman | 0:38ceb79fef03 | 289 | uint32_t new_cycles_until_match = (_cur_match_time - current) & _mask; |
kevman | 0:38ceb79fef03 | 290 | if (new_cycles_until_match > cycles_until_match) { |
kevman | 0:38ceb79fef03 | 291 | // Overflow so fire now |
kevman | 0:38ceb79fef03 | 292 | _intf->fire_interrupt(); |
kevman | 0:38ceb79fef03 | 293 | return; |
kevman | 0:38ceb79fef03 | 294 | } |
kevman | 0:38ceb79fef03 | 295 | |
kevman | 0:38ceb79fef03 | 296 | // Update variables with new time |
kevman | 0:38ceb79fef03 | 297 | cycles_until_match = new_cycles_until_match; |
kevman | 0:38ceb79fef03 | 298 | too_close = cycles_until_match < _min_count_until_match; |
kevman | 0:38ceb79fef03 | 299 | } |
kevman | 0:38ceb79fef03 | 300 | |
kevman | 0:38ceb79fef03 | 301 | if (too_close) { |
kevman | 0:38ceb79fef03 | 302 | |
kevman | 0:38ceb79fef03 | 303 | // Low power ticker incremented to less than _min_count_until_match |
kevman | 0:38ceb79fef03 | 304 | // so low power ticker may not fire. Use Timeout to ensure it does fire. |
kevman | 0:38ceb79fef03 | 305 | uint32_t ticks = cycles_until_match < _min_count_until_match ? cycles_until_match : _min_count_until_match; |
kevman | 0:38ceb79fef03 | 306 | _timeout.attach_us(mbed::callback(this, &LowPowerTickerWrapper::_timeout_handler), _lp_ticks_to_us(ticks)); |
kevman | 0:38ceb79fef03 | 307 | _pending_timeout = true; |
kevman | 0:38ceb79fef03 | 308 | return; |
kevman | 0:38ceb79fef03 | 309 | } |
kevman | 0:38ceb79fef03 | 310 | } |