163 lines
3.8 KiB
C
163 lines
3.8 KiB
C
/*
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* Copyright (c) 2006-2018, 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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* 2020-09-08 Chenyingchun first version
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*/
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#include "board.h"
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <nrfx_rtc.h>
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#include <nrfx_clock.h>
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#ifdef BSP_USING_ONCHIP_RTC
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#define LOG_TAG "drv.rtc"
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#define DBG_LVL DBG_LOG
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#include <rtdbg.h>
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/* 2018-01-30 14:44:50 = RTC_TIME_INIT(2018, 1, 30, 14, 44, 50) */
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#define RTC_TIME_INIT(year, month, day, hour, minute, second) \
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{.tm_year = year - 1900, .tm_mon = month - 1, .tm_mday = day, .tm_hour = hour, .tm_min = minute, .tm_sec = second}
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#ifndef ONCHIP_RTC_TIME_DEFAULT
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#define ONCHIP_RTC_TIME_DEFAULT RTC_TIME_INIT(2018, 1, 1, 0, 0 ,0)
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#endif
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#ifndef RTC_INSTANCE_ID
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#define RTC_INSTANCE_ID (2)
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#endif
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#define TICK_FREQUENCE_HZ (RT_TICK_PER_SECOND) // RTC tick frequence, in HZ
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static struct rt_device rtc;
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static time_t init_time;
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static uint32_t tick = 0;
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static void rtc_callback(nrfx_rtc_int_type_t int_type)
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{
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static uint32_t count = 0;
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if (int_type == NRFX_RTC_INT_TICK)
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{
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count++;
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if((count % TICK_FREQUENCE_HZ) == 0)
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{
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tick++;
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}
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}
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}
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static rt_err_t rt_rtc_config(struct rt_device *dev)
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{
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#define SYSTICK_CLOCK_HZ (32768UL)
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#define RTC_PRESCALER ((uint32_t) (NRFX_ROUNDED_DIV(SYSTICK_CLOCK_HZ, TICK_FREQUENCE_HZ) - 1))
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const nrfx_rtc_t rtc_instance = NRFX_RTC_INSTANCE(RTC_INSTANCE_ID);
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nrf_clock_lf_src_set(NRF_CLOCK, (nrf_clock_lfclk_t)NRFX_CLOCK_CONFIG_LF_SRC);
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nrfx_clock_lfclk_start();
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//Initialize RTC instance
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nrfx_rtc_config_t config = NRFX_RTC_DEFAULT_CONFIG;
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config.prescaler = RTC_PRESCALER;
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nrfx_rtc_init(&rtc_instance, &config, rtc_callback);
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nrfx_rtc_tick_enable(&rtc_instance, true);
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//Power on RTC instance
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nrfx_rtc_enable(&rtc_instance);
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return RT_EOK;
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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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time_t *time;
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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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{
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time = (time_t *) args;
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*time = init_time + tick;
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break;
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}
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case RT_DEVICE_CTRL_RTC_SET_TIME:
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{
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time = (time_t *) args;
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init_time = *time - tick;
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break;
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}
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}
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return RT_EOK;
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}
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#ifdef RT_USING_DEVICE_OPS
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const static struct rt_device_ops rtc_ops =
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{
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RT_NULL,
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RT_NULL,
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RT_NULL,
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RT_NULL,
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RT_NULL,
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rt_rtc_control
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};
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#endif
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static rt_err_t rt_hw_rtc_register(rt_device_t device, const char *name, rt_uint32_t flag)
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{
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struct tm time_new = ONCHIP_RTC_TIME_DEFAULT;
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RT_ASSERT(device != RT_NULL);
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init_time = mktime(&time_new);
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if (rt_rtc_config(device) != RT_EOK)
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{
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return -RT_ERROR;
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}
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#ifdef RT_USING_DEVICE_OPS
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device->ops = &rtc_ops;
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#else
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device->init = RT_NULL;
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device->open = RT_NULL;
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device->close = RT_NULL;
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device->read = RT_NULL;
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device->write = RT_NULL;
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device->control = rt_rtc_control;
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#endif
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device->type = RT_Device_Class_RTC;
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device->rx_indicate = RT_NULL;
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device->tx_complete = RT_NULL;
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device->user_data = RT_NULL;
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/* register a character device */
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rt_device_register(device, name, flag);
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return RT_EOK;
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}
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int rt_hw_rtc_init(void)
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{
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rt_err_t result;
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result = rt_hw_rtc_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
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if (result != RT_EOK)
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{
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LOG_E("rtc register err code: %d", result);
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return result;
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}
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LOG_D("rtc init success");
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return RT_EOK;
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}
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INIT_DEVICE_EXPORT(rt_hw_rtc_init);
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#endif /* BSP_USING_ONCHIP_RTC */
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