RT-Thread-调用ALIENTEKMiniSTM32V35开发板的RTCRT-Thread问答社区

调用ALIENTEKMiniSTM32V35开发板的RTC

发布于 2021-06-23 16:57:52 浏览：1041 订阅该版

双击RT-Thread Setting,进入界面后点击更多配置。接着找到RTC驱动并勾选。
然后在drivers目录中打开board.h源文件，找到`#define BSP_USING_ONCHIP_RTC`的注释，取消掉。

修改drv_rtc.c文件，把
```c
#ifndef HAL_RTCEx_BKUPRead
#define HAL_RTCEx_BKUPRead(x1, x2) (~BKUP_REG_DATA)
#endif
#ifndef HAL_RTCEx_BKUPWrite
#define HAL_RTCEx_BKUPWrite(x1, x2, x3)
#endif
```
注释掉，
修改下面的get_rtc_timestamp()函数如下
```c
static time_t get_rtc_timestamp(void)
{
#if 0
    RTC_TimeTypeDef RTC_TimeStruct = {0};
    RTC_DateTypeDef RTC_DateStruct = {0};
    struct tm tm_new;
    HAL_RTC_GetTime(&RTC_Handler, &RTC_TimeStruct, RTC_FORMAT_BIN);
    HAL_RTC_GetDate(&RTC_Handler, &RTC_DateStruct, RTC_FORMAT_BIN);
    tm_new.tm_sec  = RTC_TimeStruct.Seconds;
    tm_new.tm_min  = RTC_TimeStruct.Minutes;
    tm_new.tm_hour = RTC_TimeStruct.Hours;
    tm_new.tm_mday = RTC_DateStruct.Date;
    tm_new.tm_mon  = RTC_DateStruct.Month - 1;
    tm_new.tm_year = RTC_DateStruct.Year + 100;
    LOG_D("get rtc time.");
    return mktime(&tm_new);
#else
    time_t timestamp;
    timestamp = RTC->CNTH;
    /* 得到计数器中的值(秒钟数) */
    timestamp <<= 16;
    timestamp += RTC->CNTL;
    LOG_D("get rtc time.");
    return timestamp;
#endif
}
```
修改下面的set_rtc_time_stamp()函数如下：
```c
static rt_err_t set_rtc_time_stamp(time_t time_stamp)
{
#if 0
    RTC_TimeTypeDef RTC_TimeStruct = {0};
    RTC_DateTypeDef RTC_DateStruct = {0};
    struct tm *p_tm;
    p_tm = localtime(&time_stamp);
    if (p_tm->tm_year < 100)
    {
        return -RT_ERROR;
    }
    RTC_TimeStruct.Seconds = p_tm->tm_sec ;
    RTC_TimeStruct.Minutes = p_tm->tm_min ;
    RTC_TimeStruct.Hours   = p_tm->tm_hour;
    RTC_DateStruct.Date = p_tm->tm_mday;
    RTC_DateStruct.Month   = p_tm->tm_mon + 1 ;
    RTC_DateStruct.Year = p_tm->tm_year - 100;
    RTC_DateStruct.WeekDay = p_tm->tm_wday + 1;
    if (HAL_RTC_SetTime(&RTC_Handler, &RTC_TimeStruct, RTC_FORMAT_BIN) != HAL_OK)
    {
        return -RT_ERROR;
    }
    if (HAL_RTC_SetDate(&RTC_Handler, &RTC_DateStruct, RTC_FORMAT_BIN) != HAL_OK)
    {
        return -RT_ERROR;
    }
    LOG_D("set rtc time.");
    HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR1, BKUP_REG_DATA);
    return RT_EOK;
    }
#else
/* 设置时钟 */
    RCC->APB1ENR |= 1<<28;
/* 使能电源时钟 */
    RCC->APB1ENR |= 1<<27;
/* 使能备份时钟 */
    PWR->CR |= 1 << 8;
/* 取消备份区写保护 */
/* 上面三步是必须的! */
    RTC->CRL |= 1 << 4;
/* 允许配置 */
    RTC->CNTL = time_stamp & 0xffff;
    RTC->CNTH = time_stamp >> 16;
    RTC->CRL &= ~(1 << 4);
/* 配置更新 */
    while (!(RTC->CRL & (1 << 5)));/* 等待RTC寄存器操作完成 */
    HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR1, BKUP_REG_DATA);
    LOG_D("set rtc time.");
    return RT_EOK;
    #endif
}
```
完成上述步骤后，打开终端msh命令输入date可以查到当前时间日期，一开始为默认时间，需要手动输入时间日期例如：
```
date 2021 06 23 16 56 30
``` 
进行设置。

参考文章
> https://bbs.huaweicloud.com/blogs/218574