Need help !!! I want to make 3 delay functions which works guaranteed delay in nanoSecond, microSecond and milliSeconds using Timer.

[Vivek yadav1]

What i am currently using to achieve my goal.

Few Details :

1: STM32F103C8 Blue Pill

2: CMISS core Library

3:Datasheet, Reference Manual and Programming Manual

I have attached two files. Which give you some idea that how I want to make These 3 functions. I want to understand at Register level.

I want to configure Registers by myself.

Thanks & Regards

@Vivek yadav​ 

[TDK]

you can get time between external events at higher resolution, but not delays. You’re still limited to an integer number of system ticks, plus some ticks in overhead. Of course at 480MHz you’re just shy of 2ns resolution.

The stm32f3 also has a super precise timer for external events.