2021-11-24 12:47 AM
Hi , I am working on STM32F469I-DISCO kit.
In that actually Internal RTC time is not running
I configured internal rtc from cubemx. I am getting Time what i did set time only.
no more time is running. support me what the issue for not running time.
2021-11-24 01:47 AM
Please edit and refine question so the entire question isn't in the Summary..
For the RTC to keep running it needs to be using the LSE clock, and you need to go into low power modes, and make a special effort not to reset or clear the RTC when restarted or reset.
2021-11-24 01:58 AM
ok I changed .
I already used the LSE clock in clock configuration. It shows 32.768Khz to RTC clcok.
you mentioned low power modes. how can i select low power mode.
2021-11-24 09:53 AM
hi please give me solution for rtc time keep running for STM32F469I_Disco kit
2021-11-24 12:57 PM
I suspect you'll need to go beyond CubeMX, and perhaps fish in the CubeF4 example library for the DISCO/EVAL boards to find some good RTC / PWR examples.
Most of my F4 work was done with the SPL, and forum content about that has been lost/destroyed.
Briefly,
STANDBY is the lowest power mode.
You need to determine the cause of Reset, ie exit from standby, wake-up, etc.
You need to determine if the RTC/LSE is running already, and not break or reset it, thereby losing the time information.
The examples are not complete/available for all boards, some analysis and porting tends to be involved.
STM32Cube_FW_F4_V1.25.0\Projects\STM32469I_EVAL\Examples\PWR\PWR_STANDBY\Src\main.c
2021-11-24 03:17 PM
Read out and check/post content of RCC_BDCR and all RCC registers.
JW