I created new STM32F103C8 project. I'm using STD Periph library. STM32F103 works with 8Mhz HSE oscillator. But I did not get 72 Mhz. I'm measuirng PLLCLK frequency with MCO.
I was only 4 Mhz with the MCO. So PLLCLK is 8Mhz
How to increase the SYSCLK frequency to 72Mhz?
I attached the project file. Thanks