196 lines
5.1 KiB
C
196 lines
5.1 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2009-01-05 Bernard the first version
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* 2010-12-27 onelife Modify for EFM32
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* 2011-06-16 onelife Modify init function for efm32lib v2 upgrading
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* 2011-12-14 onelife Move LFXO enabling routine to driver initialization function (board.c)
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*/
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/***************************************************************************//**
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* @addtogroup efm32
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* @{
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******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include <rtdevice.h>
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#include "board.h"
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#include "hdl_interrupt.h"
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#include "drv_rtc.h"
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#if defined(RT_USING_RTC)
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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#ifdef RT_RTC_DEBUG
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#define rtc_debug(format,args...) rt_kprintf(format, ##args)
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#else
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#define rtc_debug(format,args...)
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#endif
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/* Private variables ---------------------------------------------------------*/
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static struct rt_device rtc;
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static rt_uint32_t rtc_time;
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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static rt_err_t rt_rtc_open(rt_device_t dev, rt_uint16_t oflag)
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{
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if (dev->rx_indicate != RT_NULL)
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{
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/* Open Interrupt */
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}
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return RT_EOK;
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}
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static rt_ssize_t rt_rtc_read(
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rt_device_t dev,
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rt_off_t pos,
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void* buffer,
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rt_size_t size)
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{
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return 0;
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}
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/***************************************************************************//**
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* @brief
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* Configure RTC device
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*
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* @details
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*
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* @note
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*
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* @param[in] dev
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* Pointer to device descriptor
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*
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* @param[in] cmd
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* RTC control command
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*
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* @param[in] args
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* Arguments
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*
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* @return
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* Error code
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******************************************************************************/
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static rt_err_t rt_rtc_control(rt_device_t dev, int cmd, void *args)
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{
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RT_ASSERT(dev != RT_NULL);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_RTC_GET_TIME:
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*(rt_uint32_t *)args = rtc_time + RTC_CounterGet();
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rtc_debug("RTC: get rtc_time %x + %x\n", rtc_time, RTC_CounterGet());
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break;
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case RT_DEVICE_CTRL_RTC_SET_TIME:
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{
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rtc_time = *(rt_uint32_t *)args;
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rtc_debug("RTC: set rtc_time %x\n", rtc_time);
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/* Reset counter */
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RTC_CounterReset();
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}
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break;
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}
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return RT_EOK;
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}
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/***************************************************************************//**
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* @brief
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* RTC counter overflow interrupt handler
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*
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* @details
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*
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* @note
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******************************************************************************/
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void rt_hw_rtc_isr(rt_device_t device)
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{
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if (RTC->IF & RTC_IFC_OF)
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{
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rtc_time += _RTC_CNT_MASK;
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}
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RTC->IFC = _RTC_IFC_MASK;
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}
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/***************************************************************************//**
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* @brief
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* Initialize all RTC module related hardware and register RTC device to kernel
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*
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* @details
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*
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* @note
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******************************************************************************/
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void rt_hw_rtc_init(void)
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{
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rt_uint32_t reset;
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reset = RMU_ResetCauseGet();
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// TODO: What is the current reset mode?
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if (reset & RMU_RSTCAUSE_PORST || reset & RMU_RSTCAUSE_EXTRST)
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{
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RTC_Init_TypeDef rtcInit;
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efm32_irq_hook_init_t hook;
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rtcInit.enable = true;
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rtcInit.debugRun = false;
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rtcInit.comp0Top = false;
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rtc_time = 0UL;
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rt_kprintf("rtc is not configured\n");
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rt_kprintf("please configure with set_date and set_time\n");
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/* Configuring clock */
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CMU_ClockDivSet(cmuClock_RTC,cmuClkDiv_32768);
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CMU_ClockEnable(cmuClock_RTC, true);
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/* Initialize and enable RTC */
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RTC_Reset();
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RTC_Init(&rtcInit);
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hook.type = efm32_irq_type_rtc;
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hook.unit = 0;
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hook.cbFunc = rt_hw_rtc_isr;
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hook.userPtr = RT_NULL;
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efm32_irq_hook_register(&hook);
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/* Enabling Interrupt from RTC */
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RTC_IntEnable(RTC_IFC_OF);
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RTC_IntClear(RTC_IFC_OF);
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NVIC_ClearPendingIRQ(RTC_IRQn);
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NVIC_SetPriority(RTC_IRQn, EFM32_IRQ_PRI_DEFAULT);
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NVIC_EnableIRQ(RTC_IRQn);
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}
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/* register rtc device */
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rtc.type = RT_Device_Class_RTC;
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rtc.rx_indicate = RT_NULL;
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rtc.tx_complete = RT_NULL;
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rtc.init = RT_NULL;
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rtc.open = rt_rtc_open;
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rtc.close = RT_NULL;
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rtc.read = rt_rtc_read;
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rtc.write = RT_NULL;
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rtc.control = rt_rtc_control;
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rtc.user_data = RT_NULL; /* no private */
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rt_device_register(&rtc, RT_RTC_NAME, RT_DEVICE_FLAG_RDWR | EFM32_NO_DATA);
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}
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#endif
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/***************************************************************************//**
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* @}
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******************************************************************************/
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