430中Flash存储器如何读写？

cjing

430中Flash存储器如何读写？ [复制链接]

430能不能像philips单片机那样把某些数据存到自身内部的FLASH中？有例子程序么？

baiye0218

可以

//****************************************************************************
// MSP-FET430P140 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.
//
// MSP430F149
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
//
// M. Mitchell
// Texas Instruments, Inc
// September 2003
// Built with IAR Embedded Workbench Version: 1.26B
// December 2003
// Updated for IAR Embedded Workbench Version: 2.21B
//******************************************************************************

#include <msp430x14x.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
}

fly520

我看手册好像不止这么点空间吧，其余的也是这么写么？

heyuqi

读怎么做啊
有汇编程序吗？

liuxiaosheng

引用:

读怎么做啊 有汇编程序吗？

读就象读RAM一样操作
读不同于写

joychow

为什么430的FLASH一定要采用段擦除了，感觉真的很不是爽~~
如果程序 刚好执行到擦除后，就由于干扰跑飞了，岂不是很惨~~