Device System Configuration File

The system configuration files system_stm32c5xx.c and system_stm32c5xx.h provide as minimum the following:

• SystemInit() : device-specific system configuration function.

  Typically, this function configures the RCC that is part of the STM32 device. This function is called within the Reset_Handler implemented in the startup_stm32tnxx.c.

• SystemCoreClock : global variable that contains the system frequency.

  This variable can then be used by the application code as a reference value when configuring the microcontroller peripherals. Thus, this variable must be updated whenever the system clock is changed (for instance within the HAL RCC or using the unitary LL RCC APIs).

• SystemCoreClockUpdate() : function to update the SystemCoreClock with current core Clock retrieved from RCC registers.