kopia lustrzana https://github.com/micropython/micropython
104 wiersze
3.0 KiB
C
104 wiersze
3.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Glenn Ruben Bakke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "mphalport.h"
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#include "hal_timer.h"
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#include "hal_irq.h"
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#ifdef HAL_TIMER_MODULE_ENABLED
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static hal_timer_app_callback m_callback;
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void hal_timer_callback_set(hal_timer_app_callback callback) {
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m_callback = callback;
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}
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void hal_timer_init(hal_timer_conf_t const * p_timer_conf) {
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NRF_TIMER_Type * p_timer = TIMER_BASE(p_timer_conf->id);
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p_timer->CC[0] = 1000 * p_timer_conf->period;
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p_timer->MODE = TIMER_MODE_MODE_Timer;
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p_timer->BITMODE = TIMER_BITMODE_BITMODE_24Bit << TIMER_BITMODE_BITMODE_Pos;
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p_timer->PRESCALER = 4; // 1 us
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p_timer->INTENSET = TIMER_INTENSET_COMPARE0_Msk;
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p_timer->SHORTS = (TIMER_SHORTS_COMPARE0_CLEAR_Enabled << TIMER_SHORTS_COMPARE0_CLEAR_Pos);
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p_timer->TASKS_CLEAR = 1;
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hal_irq_priority(TIMER_IRQ_NUM(p_timer_conf->id), p_timer_conf->irq_priority);
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}
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void hal_timer_start(uint8_t id) {
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NRF_TIMER_Type * p_timer = TIMER_BASE(id);
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p_timer->TASKS_CLEAR = 1;
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hal_irq_enable(TIMER_IRQ_NUM(id));
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p_timer->TASKS_START = 1;
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}
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void hal_timer_stop(uint8_t id) {
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NRF_TIMER_Type * p_timer = TIMER_BASE(id);
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hal_irq_disable(TIMER_IRQ_NUM(id));
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p_timer->TASKS_STOP = 1;
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}
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static void common_irq_handler(uint8_t id) {
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NRF_TIMER_Type * p_timer = TIMER_BASE(id);
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if (p_timer->EVENTS_COMPARE[0]) {
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p_timer->EVENTS_COMPARE[0] = 0;
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m_callback(id);
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}
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}
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void TIMER0_IRQHandler(void) {
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common_irq_handler(0);
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}
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#if (MICROPY_PY_MACHINE_SOFT_PWM != 1)
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void TIMER1_IRQHandler(void) {
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common_irq_handler(1);
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}
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#endif
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void TIMER2_IRQHandler(void) {
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common_irq_handler(2);
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}
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#if NRF52
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void TIMER3_IRQHandler(void) {
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common_irq_handler(3);
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}
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void TIMER4_IRQHandler(void) {
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common_irq_handler(4);
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}
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#endif
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#endif // HAL_TIMER_MODULE_ENABLED
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