懂MSP430的帮下忙 谢谢

int *a = (int *)0x0300H;

*a = 345;

/***********************************************************************/

/* flash_idle.c 2000-06-20 */

/* */

/* Flash erase and program functions */

/* */

/* Below functions using the direct Flash programming algorithm. */

/* After starting a flash write or erase cycle, the CPU will wait */

/* until the flash is read-accessable again, so no program must be */

/* copied into RAM. However, during flash programming, the CPU is */

/* in ”idle” mode. */

/* */

/* Note: Since all interrupt vectors are unavailable during flash */

/* programming, all interrupts must be disabled. */

/* */

/* Anton Muehlhofer Texas Instruments Incorporated */

/***********************************************************************/

#define _CPU_ 5 /* 5=MSP430F1121, 6=MSP430F149 device */

#include <std_def.h> /* ports */

#include ”flash_prog.h” /* function prototypes */

/***********************************************************************/

/* Flash_wb */

/* programs 1 byte (8 bit) into the flash memory */

/***********************************************************************/

void Flash_wb( char *Data_ptr, char byte )

{

FCTL3 = 0x0A500; /* Lock = 0 */

FCTL1 = 0x0A540; /* WRT = 1 */

*Data_ptr=byte; /* program Flash word */

FCTL1 = 0x0A500; /* WRT = 0 */

FCTL3 = 0x0A510; /* Lock = 1 */

}

/***********************************************************************/

/* Flash_ww */

/* programs 1 word (16 bits) into the flash memory */

/***********************************************************************/

void Flash_ww( int *Data_ptr, int word )

{

FCTL3 = 0x0A500; /* Lock = 0 */

FCTL1 = 0x0A540; /* WRT = 1 */

*Data_ptr=word; /* program Flash word */

FCTL1 = 0x0A500; /* WRT = 0 */

FCTL3 = 0x0A510; /* Lock = 1 */

}

/***********************************************************************/

/* Flash_clr */

/* erases 1 Segment of flash memory */

/***********************************************************************/

void Flash_clr( int *Data_ptr )

{

FCTL3 = 0x0A500; /* Lock = 0 */

FCTL1 = 0x0A502; /* ERASE = 1 */

*Data_ptr=0; /* erase Flash segment */

FCTL1 = 0x0A500; /* ERASE = 0 */

FCTL3 = 0x0A510; /* Lock = 1 */

}