Posted on May 18, 2017 at 15:20 Khouloud G wrote:
Hi
Buga.D_niel
,
a) enable USART2 that I don't use, and it fails because it can't set its clock source
I'm not able toreproduce this even with the ioc file you have attached. Is this the ioc file where the issue occurs?
For further debug, could you please send us the STM32CubeMX.log file (found under your user directory in the .stm32cubemx folder).
b) enables HSI oscillator (which I don't use)
You're using the HSI as a clock source for the USART1 peripheral.This is the reason why HSI oscillator is enabled.
After changing the code generation back to HAL I'm also unable to reproduce my own issues. But to explain: my issue was that HSI was enabled, but calibration was not set by RCC, even when I did not set UART1 to use it. But again, it was solved by selecting, and then deselecting HSI as clock source, the code that enabled it was correctly removed at next generation.
The RTC example is made with HAL and my problems are with LL. With the RCC code generated for LL, the following code is generated in SystemClock_Config:
LL_PWR_EnableBkUpAccess();
LL_RCC_ForceBackupDomainReset();
LL_RCC_ReleaseBackupDomainReset();
This is obviously incorrect as I wouldn't want my backup domain to reset, and also, PWR does not have its clock enabled. My solution is to check the backup register for the value set in MX_RTC_Init. So the change in SystemClock_Config is the following:
if (RTC->BKP0R != 0x32F2) {
LL_RCC_ForceBackupDomainReset();
LL_RCC_ReleaseBackupDomainReset();
LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_HSE_DIV32);
}
RTC HAL is also incorrect. The example is useful, but in my case (CubeMX code generation) it is irrelevant because the code generation is broken. In MX_RTC_Init the magic value is checked/set after the calendar and time is reset, like this:
...
if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK) {
_Error_Handler(__FILE__, __LINE__);
}
...
if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK) {
_Error_Handler(__FILE__, __LINE__);
}
if (HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR0) != 0x32F2) {
HAL_RTCEx_BKUPWrite(&hrtc, RTC_BKP_DR0, 0x32F2);
}
Moving the check to before SetTime, the calendar/clock is no longer reset.
Unfortunately I don't have the log file because it was overwritten since then.
