STM32F103C8 RCC - Clock Configuration - CMSIS
Channel: pointer-x
Date: 07/08/2023

configuring stm32f103c8 microcontroller (on bluepill ) clock to 72MHz with standard CMSIS and also with CMSIS with bitfield access. 
stm32f103c8 RCC peripheral 

code with standard CMSIS:
https://github.com/pointer-x/stm32f103c8_RCC_CMSIS_standard
CMSIS with bitfield access:
https://github.com/pointer-x/stm32f103c8_RCC_CMSIS_bitfields