【讨论】INFO FLASH的使用

版主：我用f149片子，资料上说它有256个字节的INFO FLASH，那么我是否可以拿来保存一些保存数据，当再次上电时我能读出这些数据呢？请问在IAR WORKBENCH里怎么定义呢？谢谢！

大家快过来啊，帮我顶一下

可以保存数据，且掉电不丢失
但每次写之前必须擦除

那么请问该怎么定义呢 在IAR workbench里？

有一个参考例子，看一下吧
//****************************************************************************
// MSP-FET430x110 Demo - Flash In-System Programming
//
// Description; This program first erases flash seg A, then it increments all
// values in seg A, then it erases seg B, then copies seg A to seg B.
// Assumed MCLK 550kHz - 900kHz.
//
// MSP430F1121
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
//
// M. Mitchell
// Texas Instruments, Inc
// August 2002
// Built with IAR Embedded Workbench Version: 1.25A
// December 2003
// Updated for IAR Embedded Workbench Version: 2.21B
//******************************************************************************
//******************************************************************************

#include <msp430x11x1.h>

char value; // 8-bit value to write to segment A

// Function prototypes
void write_SegA (char value);
void copy_A2B (void);

void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
FCTL2 = FWKEY + FSSEL0 + FN0; // MCLK/2 for Flash Timing Generator
value = 0; // initialize value

while(1) // Repeat forever
{
write_SegA(value++); // Write segment A, increment value
copy_A2B(); // Copy segment A to B
}
}

void write_SegA (char value)
{
char *Flash_ptr; // Flash pointer
unsigned int i;

Flash_ptr = (char *) 0x1080; // Initialize Flash pointer
FCTL1 = FWKEY + ERASE; // Set Erase bit
FCTL3 = FWKEY; // Clear Lock bit
*Flash_ptr = 0; // Dummy write to erase Flash segment

FCTL1 = FWKEY + WRT; // Set WRT bit for write operation

for (i=0; i<128; i++)
{
*Flash_ptr++ = value; // Write value to flash
}

FCTL1 = FWKEY; // Clear WRT bit
FCTL3 = FWKEY + LOCK; // Reset LOCK bit
}


void copy_A2B (void)
{
char *Flash_ptrA; // Segment A pointer
char *Flash_ptrB; // Segment B pointer
unsigned int i;

Flash_ptrA = (char *) 0x1080; // Initialize Flash segment A pointer
Flash_ptrB = (char *) 0x1000; // Initialize Flash segment B pointer
FCTL1 = FWKEY + ERASE; // Set Erase bit
FCTL3 = FWKEY; // Clear Lock bit
*Flash_ptrB = 0; // Dummy write to erase Flash segment B
FCTL1 = FWKEY + WRT; // Set WRT bit for write operation

for (i=0; i<128; i++)
{
*Flash_ptrB++ = *Flash_ptrA++; // copy value segment A to segment B
}

FCTL1 = FWKEY; // Clear WRT bit
FCTL3 = FWKEY + LOCK; // Reset LOCK bit
}

谢谢了先