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rt-thread-official/bsp/bluetrum/libraries/hal_drivers/drv_rtc.c

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/*
* Copyright (c) 2020-2021, Bluetrum Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-01-28 greedyhao first version
* 2021-03-19 iysheng modify just set time first power up
* 2021-03-26 iysheng add alarm and 1s interrupt support
*/
#include "board.h"
#include <time.h>
#include <sys/time.h>
#ifdef BSP_USING_ONCHIP_RTC
//#define DRV_DEBUG
#define LOG_TAG "drv.rtc"
#include <drv_log.h>
static struct rt_device rtc;
/************** HAL Start *******************/
#define IRTC_ENTER_CRITICAL() uint32_t cpu_ie = PICCON & BIT(0); PICCONCLR = BIT(0);
#define IRTC_EXIT_CRITICAL() PICCON |= cpu_ie
uint8_t get_weekday(struct tm *const _tm)
{
uint8_t weekday;
time_t secs = timegm(_tm);
weekday = (secs / 86400 + 4) % 7;
return weekday;
}
void irtc_write(uint32_t cmd)
{
RTCDAT = cmd;
while (RTCCON & RTC_CON_TRANS_DONE);
}
uint8_t irtc_read(void)
{
RTCDAT = 0x00;
while (RTCCON & RTC_CON_TRANS_DONE);
return (uint8_t)RTCDAT;
}
void irtc_time_write(uint32_t cmd, uint32_t dat)
{
IRTC_ENTER_CRITICAL();
RTCCON |= RTC_CON_CHIP_SELECT;
irtc_write(cmd | RTC_WR);
irtc_write((uint8_t)(dat >> 24));
irtc_write((uint8_t)(dat >> 16));
irtc_write((uint8_t)(dat >> 8));
irtc_write((uint8_t)(dat >> 0));
RTCCON &= ~RTC_CON_CHIP_SELECT;
IRTC_EXIT_CRITICAL();
}
uint32_t irtc_time_read(uint32_t cmd)
{
uint32_t rd_val;
IRTC_ENTER_CRITICAL();
RTCCON |= RTC_CON_CHIP_SELECT;
irtc_write(cmd | RTC_RD);
*((uint8_t *)&rd_val + 3) = irtc_read();
*((uint8_t *)&rd_val + 2) = irtc_read();
*((uint8_t *)&rd_val + 1) = irtc_read();
*((uint8_t *)&rd_val + 0) = irtc_read();
RTCCON &= ~RTC_CON_CHIP_SELECT;
IRTC_EXIT_CRITICAL();
return rd_val;
}
void irtc_sfr_write(uint32_t cmd, uint8_t dat)
{
IRTC_ENTER_CRITICAL();
RTCCON |= RTC_CON_CHIP_SELECT;
irtc_write(cmd | RTC_WR);
irtc_write(dat);
RTCCON &= ~RTC_CON_CHIP_SELECT;
IRTC_EXIT_CRITICAL();
}
uint8_t irtc_sfr_read(uint32_t cmd)
{
uint8_t rd_val;
IRTC_ENTER_CRITICAL();
RTCCON |= RTC_CON_CHIP_SELECT;
irtc_write(cmd | RTC_RD);
rd_val = irtc_read();
RTCCON &= ~RTC_CON_CHIP_SELECT;
IRTC_EXIT_CRITICAL();
}
static void _init_rtc_clock(void)
{
uint8_t rtccon0;
uint8_t rtccon2;
rtccon0 = irtc_sfr_read(RTCCON0_CMD);
rtccon2 = irtc_sfr_read(RTCCON2_CMD);
#ifdef RTC_USING_INTERNAL_CLK
rtccon0 &= ~RTC_CON0_XOSC32K_ENABLE;
rtccon0 |= RTC_CON0_INTERNAL_32K;
rtccon2 | RTC_CON2_32K_SELECT;
#else
rtccon0 |= RTC_CON0_XOSC32K_ENABLE;
rtccon0 &= ~RTC_CON0_INTERNAL_32K;
rtccon2 & ~RTC_CON2_32K_SELECT;
#endif
irtc_sfr_write(RTCCON0_CMD, rtccon0);
irtc_sfr_write(RTCCON2_CMD, rtccon2);
}
void hal_rtc_init(void)
{
time_t sec = 0;
struct tm tm_new = {0};
uint8_t temp;
_init_rtc_clock();
temp = irtc_sfr_read(RTCCON0_CMD);
if (temp & RTC_CON0_PWRUP_FIRST) {
temp &= ~RTC_CON0_PWRUP_FIRST;
irtc_sfr_write(RTCCON0_CMD, temp); /* First power on */
tm_new.tm_mday = 29;
tm_new.tm_mon = 1 - 1;
tm_new.tm_year = 2021 - 1900;
sec = timegm(&tm_new);
irtc_time_write(RTCCNT_CMD, sec);
}
#ifdef RT_USING_ALARM
RTCCON |= RTC_CON_ALM_INTERRUPT;
#ifdef RTC_USING_1S_INT
RTCCON |= RTC_CON_1S_INTERRUPT;
#endif
#endif
}
/************** HAL End *******************/
static time_t get_rtc_time_stamp(void)
{
time_t sec = 0;
sec = irtc_time_read(RTCCNT_CMD);
LOG_D("get rtc time.");
return sec;
}
static rt_err_t set_rtc_time_stamp(time_t time_stamp)
{
irtc_time_write(RTCCNT_CMD, time_stamp);
return RT_EOK;
}
static rt_err_t set_rtc_alarm_stamp(time_t alarm_stamp)
{
irtc_time_write(RTCALM_CMD, alarm_stamp);
return RT_EOK;
}
static time_t get_rtc_alarm_stamp(void)
{
time_t sec = 0;
sec = irtc_time_read(RTCALM_CMD);
return sec;
}
static void rt_rtc_init(void)
{
hal_rtc_init();
}
static rt_err_t ab32_rtc_control(rt_device_t dev, int cmd, void *args)
{
rt_err_t result = RT_EOK;
RT_ASSERT(dev != RT_NULL);
switch (cmd)
{
case RT_DEVICE_CTRL_RTC_GET_TIME:
*(rt_uint32_t *)args = get_rtc_time_stamp();
LOG_D("RTC: get rtc_time %x", *(rt_uint32_t *)args);
break;
case RT_DEVICE_CTRL_RTC_SET_TIME:
if (set_rtc_time_stamp(*(rt_uint32_t *)args))
{
result = -RT_ERROR;
}
LOG_D("RTC: set rtc_time %x", *(rt_uint32_t *)args);
break;
case RT_DEVICE_CTRL_RTC_SET_ALARM:
if (set_rtc_alarm_stamp(*(rt_uint32_t *)args))
{
result = -RT_ERROR;
}
LOG_D("RTC: set alarm_stamp %x", *(rt_uint32_t *)args);
break;
case RT_DEVICE_CTRL_RTC_GET_ALARM:
*(rt_uint32_t *)args = get_rtc_alarm_stamp();
LOG_D("RTC: get alarm_stamp %x", *(rt_uint32_t *)args);
break;
}
return result;
}
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops rtc_ops =
{
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
ab32_rtc_control
};
#endif
static rt_err_t rt_hw_rtc_register(rt_device_t device, const char *name, rt_uint32_t flag)
{
RT_ASSERT(device != RT_NULL);
rt_rtc_init();
#ifdef RT_USING_DEVICE_OPS
device->ops = &rtc_ops;
#else
device->init = RT_NULL;
device->open = RT_NULL;
device->close = RT_NULL;
device->read = RT_NULL;
device->write = RT_NULL;
device->control = ab32_rtc_control;
#endif
device->type = RT_Device_Class_RTC;
device->rx_indicate = RT_NULL;
device->tx_complete = RT_NULL;
device->user_data = RT_NULL;
/* register a character device */
return rt_device_register(device, name, flag);
}
#ifdef RT_USING_ALARM
static void rtc_isr(int vector, void *param)
{
rt_interrupt_enter();
if (RTCCON & RTC_CON_ALM_PEND)
{
RTCCPND |= RTC_CPND_ALM;
}
#ifdef RTC_USING_1S_INT
if (RTCCON & RTC_CON_1S_PEND)
{
RTCCPND |= RTC_CPND_1S;
}
#endif
rt_interrupt_leave();
}
#endif
int rt_hw_rtc_init(void)
{
rt_err_t result;
result = rt_hw_rtc_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
if (result != RT_EOK)
{
LOG_E("rtc register err code: %d", result);
return result;
}
#ifdef RT_USING_ALARM
rt_hw_interrupt_install(IRQ_RTC_VECTOR, rtc_isr, RT_NULL, "rtc_isr");
#endif
LOG_D("rtc init success");
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_rtc_init);
#endif /* BSP_USING_ONCHIP_RTC */
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