/** * \file * * \brief RTC Driver (Calendar Mode) * * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries. * * \asf_license_start * * \page License * * Subject to your compliance with these terms, you may use Microchip * software and any derivatives exclusively with Microchip products. * It is your responsibility to comply with third party license terms applicable * to your use of third party software (including open source software) that * may accompany Microchip software. * * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. * * \asf_license_stop * */ #include "hpl_calendar.h" #include "hpl_timer.h" #include #include /*!< Pointer to hpl device */ static struct _timer_device *_rtc_dev = NULL; /** * \brief Initialize Timer */ int32_t _timer_init(struct _timer_device *const dev, void *const hw) { ASSERT(dev); uint16_t register_value; dev->hw = hw; hri_rtcmode0_write_CTRL_reg(dev->hw, RTC_MODE0_CTRL_SWRST); hri_rtcmode0_wait_for_sync(dev->hw); /* Set mode 0 */ register_value = RTC_MODE0_CTRL_MODE(0); /* Set prescaler */ register_value |= RTC_MODE0_CTRL_PRESCALER(CONF_RTC_PRESCALER); /* clear counter on compare/timer match */ register_value |= RTC_MODE0_CTRL_MATCHCLR; hri_rtcmode0_write_CTRL_reg(dev->hw, register_value); hri_rtcmode0_write_COMP_COMP_bf(dev->hw, 0, CONF_RTC_COMP_VAL); hri_rtcmode0_set_INTEN_CMP0_bit(dev->hw); /* set event control */ #if CONF_RTC_EVENT_CONTROL_ENABLE == 1 hri_rtcmode0_write_EVCTRL_reg( dev->hw, (CONF_RTC_PEREO0 << RTC_MODE0_EVCTRL_PEREO0_Pos) | (CONF_RTC_PEREO1 << RTC_MODE0_EVCTRL_PEREO1_Pos) | (CONF_RTC_PEREO2 << RTC_MODE0_EVCTRL_PEREO2_Pos) | (CONF_RTC_PEREO3 << RTC_MODE0_EVCTRL_PEREO3_Pos) | (CONF_RTC_PEREO4 << RTC_MODE0_EVCTRL_PEREO4_Pos) | (CONF_RTC_PEREO5 << RTC_MODE0_EVCTRL_PEREO5_Pos) | (CONF_RTC_PEREO6 << RTC_MODE0_EVCTRL_PEREO6_Pos) | (CONF_RTC_PEREO7 << RTC_MODE0_EVCTRL_PEREO7_Pos) | (CONF_RTC_COMPE0 << RTC_MODE0_EVCTRL_CMPEO_Pos) | (CONF_RTC_OVFEO << RTC_MODE0_EVCTRL_OVFEO_Pos)); #endif _rtc_dev = dev; return ERR_NONE; } /** * \brief De-initialize Timer */ void _timer_deinit(struct _timer_device *const dev) { ASSERT(dev && dev->hw); NVIC_DisableIRQ(RTC_IRQn); hri_rtcmode0_write_CTRL_reg(dev->hw, RTC_MODE0_CTRL_SWRST); } /** * \brief Start hardware timer */ void _timer_start(struct _timer_device *const dev) { ASSERT(dev && dev->hw); NVIC_EnableIRQ(RTC_IRQn); hri_rtcmode0_write_COUNT_COUNT_bf(dev->hw, 0); hri_rtcmode0_wait_for_sync(dev->hw); hri_rtcmode0_set_CTRL_ENABLE_bit(dev->hw); } /** * \brief Stop hardware timer */ void _timer_stop(struct _timer_device *const dev) { ASSERT(dev && dev->hw); hri_rtcmode0_clear_CTRL_ENABLE_bit(dev->hw); } /** * \brief Set timer period */ void _timer_set_period(struct _timer_device *const dev, const uint32_t clock_cycles) { hri_rtcmode0_write_COMP_COMP_bf(dev->hw, 0, clock_cycles); } /** * \brief Retrieve timer period */ uint32_t _timer_get_period(const struct _timer_device *const dev) { return hri_rtcmode0_read_COMP_COMP_bf(dev->hw, 0); } /** * \brief Check if timer is running */ bool _timer_is_started(const struct _timer_device *const dev) { return hri_rtcmode0_get_CTRL_ENABLE_bit(dev->hw); } /** * \brief Set timer IRQ */ void _timer_set_irq(struct _timer_device *const dev) { (void)dev; } /** * \brief RTC Timer interrupt handler * * \param[in] p The pointer to calendar device struct */ static void _rtc_timer_interrupt_handler(struct _timer_device *dev) { /* Read and mask interrupt flag register */ uint16_t flag = hri_rtcmode0_read_INTFLAG_reg(dev->hw); if (flag & RTC_MODE0_INTFLAG_CMP0) { if (dev->timer_cb.period_expired) { dev->timer_cb.period_expired(dev); } /* Clear interrupt flag */ hri_rtcmode0_clear_interrupt_CMP0_bit(dev->hw); } } /** * \brief Retrieve timer helper functions */ struct _timer_hpl_interface *_rtc_get_timer(void) { return NULL; } /** * \brief Rtc interrupt handler */ void RTC_Handler(void) { _rtc_timer_interrupt_handler(_rtc_dev); }