硬件RTC后背寄存器访问出错RTC hasn't been configured

发布于 2020-09-14 16:19:22 浏览：2834 订阅该版

7 个回答

chenyingchun 2020-09-16

这家伙很懒，什么也没写！

还没想好 2020-09-15

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Napoleon940911 2020-09-15

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Napoleon940911 2020-09-15

这家伙很懒，什么也没写！

还没想好 2020-09-16

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Napoleon940911 2020-09-16

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Ghazi 2020-09-16

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RXGC_5534 2020-09-29

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mjt840420524 2020-10-21

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Ghazi 2020-11-03

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Ghazi 2020-11-03

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leeherry 2020-09-20

这家伙很懒，什么也没写！

提供一个思路,
drv_rtc.c文件里面的
```
RT_WEAK uint32_t HAL_RTCEx_BKUPRead(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister)
{
    return (~BKUP_REG_DATA);
}

RT_WEAK void HAL_RTCEx_BKUPWrite(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister, uint32_t Data)
{
    return;
}
```
这两个函数有问题,是空的
到xxxx_hal_rtc_ex.c文件里面,找到这两个函数,复制粘贴就好了
例如 stm32f407zg 的
```
/**
  * @brief  Writes a data in a specified RTC Backup data register.
  * @param  hrtc pointer to a RTC_HandleTypeDef structure that contains
  *                the configuration information for RTC.
  * @param  BackupRegister RTC Backup data Register number.
  *          This parameter can be: RTC_BKP_DRx where x can be from 0 to 19 to
  *                                 specify the register.
  * @param  Data Data to be written in the specified RTC Backup data register.
  * @retval None
  */
void HAL_RTCEx_BKUPWrite(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister, uint32_t Data)
{
  uint32_t tmp = 0U;

/* Check the parameters */
  assert_param(IS_RTC_BKP(BackupRegister));

tmp = (uint32_t)&(hrtc->Instance->BKP0R);
  tmp += (BackupRegister * 4U);

/* Write the specified register */
  *(__IO uint32_t *)tmp = (uint32_t)Data;
}

/**
  * @brief  Reads data from the specified RTC Backup data Register.
  * @param  hrtc pointer to a RTC_HandleTypeDef structure that contains
  *                the configuration information for RTC.
  * @param  BackupRegister RTC Backup data Register number.
  *          This parameter can be: RTC_BKP_DRx where x can be from 0 to 19 to
  *                                 specify the register.
  * @retval Read value
  */
uint32_t HAL_RTCEx_BKUPRead(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister)
{
  uint32_t tmp = 0U;

/* Check the parameters */
  assert_param(IS_RTC_BKP(BackupRegister));

tmp = (uint32_t)&(hrtc->Instance->BKP0R);
  tmp += (BackupRegister * 4U);

/* Read the specified register */
  return (*(__IO uint32_t *)tmp);
}
```

//只粘贴函数的内容,不要粘贴所有
//细节处自行修改

RT_WEAK uint32_t HAL_RTCEx_BKUPRead(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister)
{
    uint32_t tmp = 0U;

/* Check the parameters */
    assert_param(IS_RTC_BKP(BackupRegister));

tmp = (uint32_t)&(hrtc->Instance->BKP0R);
    tmp += (BackupRegister * 4U);

/* Read the specified register */
    return (*(__IO uint32_t *)tmp);
}

RT_WEAK void HAL_RTCEx_BKUPWrite(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister, uint32_t Data)
{
    uint32_t tmp = 0U;

/* Check the parameters */
    assert_param(IS_RTC_BKP(BackupRegister));

tmp = (uint32_t)&(hrtc->Instance->BKP0R);
    tmp += (BackupRegister * 4U);

/* Write the specified register */
    *(__IO uint32_t *)tmp = (uint32_t)Data;
}