寄存器使用结构体进行空间地址的映射

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)