LCD registers doesn't updated properly after wake up from active-halt mode in STM8L152R6 and STM8L052C6
I am using STM8L152R6T6 and STM8L052C6 for my project.
The code wakes up from active-halt mode by RTC wake up interrupt. There is some LCD display memory (LCD_RAM) updates in RTC wake up interrupt routine.
The CPU executes this update function and some other functions. And after goes to active-halt mode again.
Although the CPU executes update function, there is not any change on display or LCD registers when i look in debug.
If I reduce system clock speed by using clock divider, problem doesn't occured. And also, when I added to code some dummy delay, this is solving the problem. BTW, I am using HSI (16 MHz)
I want to solve this problem officially, not by putting dummy delay to the code or reduce system clock speed. For instance wait for a flag.
Do you have any idea, or solution about this problem?
You can see and analyze the demo code in attachment.