_init.h

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#ifndef MCU_INIT_H
#define MCU_INIT_H
 
/* -- Includes -- */
#include "defines.h"
#include "isr.h"
#include "rcc.h"
 
/* -- Coprocessors -- */
#define EN_FPU FALSE
 
/* Clock Configuration:
 * 8MHz (HSE) / 4 (PLLM) = 2MHz
 * 2MHz * 180 (PLLN) = 360MHz
 * 360MHz / 2 (PLLP) = 180MHz
 * 180MHz / 4 (PPRE1) = 45MHz (APB1)
 * 180MHz / 2 (PPRE2) = 90MHz (APB2)
 */
 
#define PLLM_VAL   4U
#define PLLN_VAL   180U
#define PLLP_VAL   0U // == 2
#define PPRE1_VAL  RCC_APB_PRESCALER_DIV4
#define PPRE2_VAL  RCC_APB_PRESCALER_DIV2
#define PLLSRC_VAL 1U // Use HSE clock
 
_Static_assert((((HSE_CLK / PLLM_VAL) * PLLN_VAL) / 2) == (SYS_CLK),
               "System clock calculation mismatch. Did you update SYS_CLK?");
 
_Static_assert((SYS_CLK / 4) == (APB1_CLK),
               "APB1 clock calculation mismatch. Did you update APB1_CLK?");
 
_Static_assert((SYS_CLK / 2) == (APB2_CLK),
               "APB2 clock calculation mismatch. Did you update APB2_CLK?");
 
/* Power Regulation */
#define EN_OVERDRIVE TRUE
 
void mcu_init(void);
 
#endif