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** Copyright (C) 2020 Denis Shienkov <denis.shienkov@gmail.com>
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#ifndef SYSTEM_H
#define SYSTEM_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define __IO  volatile

// General purpose input/output registers map.
struct gpio_regs_map {
    __IO uint32_t CRL;
    __IO uint32_t CRH;
    __IO uint32_t IDR;
    __IO uint32_t ODR;
    __IO uint32_t BSRR;
    __IO uint32_t BRR;
    __IO uint32_t LCKR;
};

// Reset and clock control registers map.
struct rcc_regs_map {
    __IO uint32_t CR;
    __IO uint32_t CFGR;
    __IO uint32_t CIR;
    __IO uint32_t APB2RSTR;
    __IO uint32_t APB1RSTR;
    __IO uint32_t AHBENR;
    __IO uint32_t APB2ENR;
    __IO uint32_t APB1ENR;
    __IO uint32_t BDCR;
    __IO uint32_t CSR;
};

#define PERIPH_ADDRESS      (0x40000000u)

#define APB2PERIPH_ADDRESS  (PERIPH_ADDRESS + 0x00010000u)
#define AHBPERIPH_ADDRESS   (PERIPH_ADDRESS + 0x00020000u)

#define GPIOC_REGS_ADDRESS  (APB2PERIPH_ADDRESS + 0x00001000u)
#define RCC_REGS_ADDRESS    (AHBPERIPH_ADDRESS + 0x00001000u)

#define GPIOC_REGS_MAP      ((struct gpio_regs_map *)GPIOC_REGS_ADDRESS)
#define RCC_REGS_MAP        ((struct rcc_regs_map *)RCC_REGS_ADDRESS)

#ifdef __cplusplus
}
#endif

#endif // SYSTEM_H
