circuitpython/ports/nrf/hal/hal_timer.c

104 lines
3.0 KiB
C

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