调用ALIENTEKMiniSTM32V35开发板的RTC驱动

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

#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

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：

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。

原作者：巴菲特不非