一、例程编译、烧录确认
首先按照全志在线文档平台的点灯教程确保能正常编译、烧录和点灯：https://xr806.docs.aw-ol.com/…
确保例程没问题后，我们再改造例程，实现我们想要的功能
二、代码编写
我们将hello工程复制一份改文件夹名为rtc_demo，目录结构如下

rtc_demo
├── BUILD.gn
└── src
└── main.c
然后BUILD.gn内容增加头文件引用，部分配置如下:

import("//device/xradio/xr806/liteos_m/config.gni")static_library("app_rtc") {configs = []sources = ["src/main.c",]cflags = board_cflagsinclude_dirs = board_include_dirsinclude_dirs += ["//kernel/liteos_m/kernel/arch/include",]
}
~~~~
上一层的BUILD.gn内容为：

group(“ohosdemo”) {

deps = [#"hello_demo:app_hello",#"led_demo:app_led",#"iot_peripheral:app_peripheral",#"wlan_demo:app_WlanTest",#"http_demo:app_myhttp",#"tcp_demo:app_tcp",#"web_server_demo:app_web",#"uart_demo:app_uart",#"pwm_led_demo:app_pwm_led","rtc_demo:app_rtc",
]

}

接下来是main.c,内容如下:

#include <stdio.h>
#include "ohos_init.h"
#include "kernel/os/os.h"
#include "driver/chip/hal_rtc.h"
#include <math.h>#define OFFSET_YEAR                                      2000
#define GET_AD_YEAR(counterYear)                         (counterYear + OFFSET_YEAR)
#define GET_COUNTER_YEAR(adYear)                         (adYear - OFFSET_YEAR)
#define RTC_SET_LEAP_YEAR(isLeapYear)                    HAL_RTC_SetLeapYear(isLeapYear)
#define RTC_SET_DDHHMMSS(wday, hour, minute, second)     HAL_RTC_SetDDHHMMSS(wday, hour, minute, second)
#define RTC_SET_YYMMDD(isLeapYear, year, month, mday)    HAL_RTC_SetYYMMDD(isLeapYear, year, month, mday)
#define RTC_STOP_WDAY_ALARM(void)                        HAL_RTC_StopWDayAlarm(void)
#define RTC_STOP_SEC_ALARM(void)                         HAL_RTC_StopSecAlarm(void)void rtc_get_yymmdd(uint8_t *isLeapYear, uint8_t *year, uint8_t *month, uint8_t *mday)
{HAL_RTC_GetYYMMDD(isLeapYear, year, month, mday);
}void rtc_get_ddhhmmss(RTC_WeekDay *wday, uint8_t *hour, uint8_t *minute, uint8_t *second)
{HAL_RTC_GetDDHHMMSS(wday, hour, minute, second);
}void analysis_wday(RTC_WeekDay wday, char *buf)
{if (wday == 0)sprintf(buf, "%s", "monday");else if (wday == 1)sprintf(buf, "%s", "tuesday");else if (wday == 2)sprintf(buf, "%s", "wednesday");else if (wday == 3)sprintf(buf, "%s", "thursday");else if (wday == 4)sprintf(buf, "%s", "friday");else if (wday == 5)sprintf(buf, "%s", "saturday");else if (wday == 6)sprintf(buf, "%s", "sunday");
}/*** @brief Determine whether it is a leap year* @param[in] adYear : AD. year* @return if it is a leap year return 1 else 0*/
uint8_t is_leap_year(uint16_t adYear)
{if ((adYear % 4 == 0 && adYear % 100 != 0)|| (adYear % 400 == 0 && adYear % 3200 != 0)|| (adYear % 172800 == 0))return 1;elsereturn 0;
}/*** @brief  transform real AD year to counter year and Set the RTC date,* including leaf year flag, year, month and month day* @param[in] adYear : real AD year* @return :  return value < 0 on erro** @note adYear = counter year + OFFSET_YEAR, counter year  set to [0, 255]*/
int rtc_set_yymmdd(uint16_t adYear, uint8_t month, uint8_t mday)
{if (GET_COUNTER_YEAR(adYear) < 0) {printf("\n\nERRO: adYear should be greater than OFFSET_YEAR!\n\n");return -1;} else if (GET_COUNTER_YEAR(adYear) > 255) {printf("\n\nERRO: adYear should be less than (OFFSET_YEAR+255)!\n\n");return -2;}RTC_SET_YYMMDD(is_leap_year(adYear), GET_COUNTER_YEAR(adYear), month, mday);return 0;
}void rtc_set_time(void)
{/*set time : year mouth day hour minute second*/printf("set time : 2021-21-27, tuesday, 15:57:50\n");rtc_set_yymmdd(2021, 12, 27);RTC_SET_DDHHMMSS(RTC_WDAY_TUESDAY, 15, 57, 50);
}void rtc_read_time(void)
{uint8_t leap, counterYear, mouth, mday;uint16_t adYear;RTC_WeekDay wday;uint8_t hour, minute, second;char buf[10];printf("read time:\n");rtc_get_yymmdd(&leap, &counterYear, &mouth, &mday);rtc_get_ddhhmmss(&wday, &hour, &minute, &second);analysis_wday(wday, buf);adYear = GET_AD_YEAR(counterYear);if (is_leap_year(adYear))printf("Is Leap Year\n");printf("%d-%d-%d, ", adYear, mouth, mday);printf("%s,%d:%d:%d\n", buf, hour, minute, second);
}void rtc_reset_leap_year(void)
{uint8_t isLeapYear, counterYear, mouth, day;uint16_t adYear;rtc_get_yymmdd(&isLeapYear, &counterYear, &mouth, &day);adYear = GET_AD_YEAR(counterYear);isLeapYear = is_leap_year(adYear);RTC_SET_LEAP_YEAR(isLeapYear);
}void wday_alarm_callback(void *arg)
{rtc_read_time();RTC_STOP_WDAY_ALARM();printf("wday alarm is arrive!!!\n\n");
}void wday_alarm(void)
{RTC_WDayAlarmStartParam wday_param;printf("\nset wday alarm next day 0:0:20 \n");wday_param.alarmHour = 0;wday_param.alarmMinute = 0;wday_param.alarmSecond = 20;wday_param.alarmWDayMask = RTC_WDAY_ALARM_EN_BIT(RTC_WDAY_SUNDAY);wday_param.arg = NULL;wday_param.callback = wday_alarm_callback;HAL_RTC_StartWDayAlarm(&wday_param);
}void sec_alarm_callback(void *arg)
{rtc_read_time();printf("second alarm is arrive!!!\n\n");
}void sec_alarm(void)
{uint32_t alarmSecond;RTC_SecAlarmStartParam secParam;alarmSecond = 20;printf("set sec alarm %us after\n", alarmSecond);secParam.alarmSeconds = alarmSecond;secParam.arg = NULL;secParam.callback = sec_alarm_callback;HAL_RTC_StartSecAlarm(&secParam);
}/*** @brief Read the time value (in microsecond) of the RTC's Free running counter** Free running counter is a 48-bit counter which is driven by LFCLK and starts* to count as soon as the system reset is released and the LFCLK is ready.** @note can't printf more than 32 bit digital*/
void read_free_run_time(void)
{uint64_t freeRunTime = 0;freeRunTime = HAL_RTC_GetFreeRunTime();if (freeRunTime < pow(2, 32))printf("ReadFreeRunTime: %u uS\n", (uint32_t)freeRunTime);
}
void show_run_time(void)
{static int count = 40;uint8_t isShow = 1;printf("rtc show run time %d times start.\n", count);while (isShow) {if (count > 0) {read_free_run_time();count--;} elseisShow = 0;OS_Sleep(1);}printf("rtc show run time over.\n");
}int rtc_init(void)
{rtc_set_time();rtc_read_time();wday_alarm();sec_alarm();show_run_time();return 0;
}void rtc_deinit(void)
{RTC_STOP_SEC_ALARM();RTC_STOP_WDAY_ALARM();
}/* Run this example, please connect the uart0 */
int rtc_test(void)
{printf("rtc example started\n\n");/*waiting for  rtc stability*/OS_MSleep(200);rtc_init();while (1) {OS_Sleep(1);rtc_read_time();rtc_reset_leap_year();}
}SYS_RUN(rtc_test);

要想实现设置一次，一直运行rtc的话板子没有后备电池，所以，我也没有将设置时间的标志位写进flash,所以每次启动都会设置时间，这个只是一个rtc的demo