寄存器使用结构体进行空间地址的映射

来源：互联网发布：网络运维管理论坛编辑：程序博客网时间：2024/05/21 14:45

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)