寄存器使用结构体进行空间地址的映射

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我是靠谱客的博主暴躁羊，最近开发中收集的这篇文章主要介绍寄存器使用结构体进行空间地址的映射，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

方式一：
typedef struct
{
union {
__I uint8_t RBR;    //RBR THR DLL 三个寄存器都占用空间 0x4001 0000
__O uint8_t THR;
__IO uint8_t DLL;
       uint32_t RESERVED0;
};
union {
__IO uint8_t DLM;    //DLM IER 都占用空间 0x4001 0004
__IO uint32_t IER;
};
union {
__I uint32_t IIR;    //IIR FCR 都占用空间 0x4001 0008
__O uint8_t FCR;
};
__IO uint8_t LCR;    //0x4001 000C
       uint8_t RESERVED1[3];
__IO uint8_t MCR;     //0x4001 0010
       uint8_t RESERVED2[3];
__I uint8_t LSR;     // 0x4001 0014
       uint8_t RESERVED3[3];
__I uint8_t MSR;      //0x4001 0018
       uint8_t RESERVED4[3];
__IO uint8_t SCR;        //0x4001 001C
       uint8_t RESERVED5[3];
__IO uint32_t ACR;      //0x4001 0020
       uint32_t RESERVED6;
__IO uint32_t FDR;    //0x4001 0028
       uint32_t RESERVED7;
__IO uint8_t TER;      //0x4001 0030
       uint8_t RESERVED8[27];
__IO uint8_t RS485CTRL;     //0x4001 004C
       uint8_t RESERVED9[3];
__IO uint8_t ADRMATCH;     //0x4001 0050
       uint8_t RESERVED10[3];
__IO uint8_t RS485DLY;     //0x4001 0054
       uint8_t RESERVED11[3];
__I uint8_t FIFOLVL;   //0x4001 0058
} LPC_UART1_TypeDef;

#define LPC_APB0_BASE         (0x40000000UL)
#define LPC_UART1_BASE        (LPC_APB0_BASE + 0x10000)
#define LPC_UART1             ((LPC_UART1_TypeDef     *) LPC_UART1_BASE    )

方式二：

/*********************************************************************************************************
** UART1
*********************************************************************************************************/
#define U1RBRTHR                (*(volatile unsigned long *)0x40010000) /* U1DLL, U1RBR and U1THR       */
#define U1DLL                   U1RBRTHR                                /* share the same address       */
#define U1RBR                   U1RBRTHR
#define U1THR                   U1RBRTHR

#define U1IER (*(volatile unsigned long *)0x40010004) /* U1DLM and U1IER */
#define U1DLM U1IER /* share the same address */

#define U1FCR (*(volatile unsigned long *)0x40010008) /* U1FCR and U1IIR */
#define U1IIR U1FCR /* share the same address */

#define U1LCR                   (*(volatile unsigned long *)0x4001000C)
#define U1MCR                   (*(volatile unsigned long *)0x40010010)
#define U1LSR                   (*(volatile unsigned long *)0x40010014)
#define U1MSR                   (*(volatile unsigned long *)0x40010018)
#define U1SCR                   (*(volatile unsigned long *)0x4001001C)
#define U1ACR                   (*(volatile unsigned long *)0x40010020)
#define U1FDR                   (*(volatile unsigned long *)0x40010028)
#define U1TER                   (*(volatile unsigned long *)0x40010030)
#define U1RS485CTRL             (*(volatile unsigned long *)0x4001004C)
#define U1ADRMATCH              (*(volatile unsigned long *)0x40010050)
#define U1RS485DLY              (*(volatile unsigned long *)0x40010054)
#define U1FIFOLVL               (*(volatile unsigned long *)0x40010058)