Sewi/Firmware/hpl/rtc/hpl_rtc.c
2026-02-07 16:41:08 +01:00

188 lines
4.7 KiB
C

/**
* \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 <hpl_rtc_config.h>
#include <utils_assert.h>
/*!< 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);
}