On the data sheet block diagram, it shows it to be 45MHz - APB1. However, on the clock configuration screen on STM32CUBEIDE there are two APB1 clocks - the APB1 Peripheral Clock, and the APB1 Timer Clock. Naturally I would assume it's the "timer clo...

I am trying to port over some code from PIC to STM32. In the pic code, the ISR took the pointer data from the received uart message (1 byte) and then sent that pointer data to a circular_buffer_put function (effectively putting it into the circular b...