Posted on March 20, 2018 at 08:47when use the stm32f103xx MCU RTC module with HAL lib, the rtc init code generated with ll lib function.
the steps to replay the issue.
1) select MCU as stm32f103rct6;
2)check 'Generate peripheral initialization as a pair of'.c/.h' files per peripheral' from 'menu project->Code Generator->Generated files';
3) generate the source code;
4) the rtc init function in rtc.c file as below
void HAL_RTC_MspInit(RTC_HandleTypeDef* rtcHandle)
{
if(rtcHandle->Instance==RTC)
{
/* USER CODE BEGIN RTC_MspInit 0 */
/* USER CODE END RTC_MspInit 0 */
LL_PWR_EnableBkUpAccess();
/* Enable BKP CLK enable for backup registers */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_BKP);
/* RTC clock enable */
__HAL_RCC_RTC_ENABLE();
/* USER CODE BEGIN RTC_MspInit 1 */
/* USER CODE END RTC_MspInit 1 */
}
}
this two functions should been replace with
HAL_PWR_EnableBkUpAccess();
__HAL_RCC_BKP_CLK_ENABLE();
otherwise, the rtc.c code can't been complied.
error informaton as below
Warning[Pe223]: function 'LL_PWR_EnableBkUpAccess' declared implicitly D:\temp\rtc\Src\rtc.c 110
Warning[Pe223]: function 'LL_APB1_GRP1_EnableClock' declared implicitly D:\temp\rtc\Src\rtc.c 112
Error[Pe020]: identifier 'LL_APB1_GRP1_PERIPH_BKP' is undefined D:\temp\rtc\Src\rtc.c 112
