#ifndef __BITBAND_H
#define __BITBAND_H

#include <stm32f10x_conf.h>

// 计算位带地址的宏，addr表示实际地址，
// bitnum表示实际地址位的编号
// 0x2000 0101 - 5   ---> 0x2202 0214
#define BITBAND(addr, bitnum) \
    ((addr&0xF0000000) + 0x2000000 + \
    ((addr & 0xFFFFF) << 5) + (bitnum << 2))
    
#define MEM_ADDR(addr) *(volatile unsigned int *)(addr)

// 根据实际地址和位编号，返回位带的地址的指针并解引用。
#define BIT_BAND(addr, bitnum) MEM_ADDR(BITBAND(addr, bitnum))

#define GPIOA_IDR_ADDR (GPIOA_BASE + 0x08)
#define GPIOA_ODR_ADDR (GPIOA_BASE + 0x0C)

#define GPIOB_IDR_ADDR (GPIOB_BASE + 0x08)
#define GPIOB_ODR_ADDR (GPIOB_BASE + 0x0C)

#define GPIOC_IDR_ADDR (GPIOC_BASE + 0x08)
#define GPIOC_ODR_ADDR (GPIOC_BASE + 0x0C)

#define GPIOD_IDR_ADDR (GPIOD_BASE + 0x08)
#define GPIOD_ODR_ADDR (GPIOD_BASE + 0x0C)

#define GPIOE_IDR_ADDR (GPIOE_BASE + 0x08)
#define GPIOE_ODR_ADDR (GPIOE_BASE + 0x0C)

#define PAOut(n) BIT_BAND(GPIOA_ODR_ADDR, n)
#define PAIn(n)  BIT_BAND(GPIOA_IDR_ADDR, n)

#define PBOut(n) BIT_BAND(GPIOB_ODR_ADDR, n)
#define PBIn(n)  BIT_BAND(GPIOB_IDR_ADDR, n)

#define PCOut(n) BIT_BAND(GPIOC_ODR_ADDR, n)
#define PCIn(n)  BIT_BAND(GPIOC_IDR_ADDR, n)

#define PDOut(n) BIT_BAND(GPIOD_ODR_ADDR, n)
#define PDIn(n)  BIT_BAND(GPIOD_IDR_ADDR, n)

#define PEOut(n) BIT_BAND(GPIOE_ODR_ADDR, n)
#define PEIn(n)  BIT_BAND(GPIOE_IDR_ADDR, n)

#endif // __BITBAND_H