msp430F4152 information memory数据丢失

您是否占用了SegmentA？

如用户指南中6.2.1 SegmentA on MSP430FG47x, MSP430F47x, MSP430F47x3/4, and MSP430F471xx Devices描述。您需要先unlock SegmentA

user3673947 说：

利用  information memory 保存数据；原始数据通过编程器下载进去

另外请您先确保数据被成功下载进去了

以下是相关的测试代码以及实验结果

测试代码

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//******************************************************************************
//  MSP430F552x Demo - Flash In-System Programming w/ Long-Word write at 0x1800
//
//  Description: This program first erases flash seg D, then it writes a 32-bit
//  value to memory location 0x1800 using long-word write mode. Long-word write
//  provides faster write than byte/word mode.
//  ACLK = REFO = 32kHz, MCLK = SMCLK = default DCO 1048576Hz
//
//                MSP430x552x
//            -----------------
//        /|\|              XIN|-
//         | |                 |
//         --|RST          XOUT|-
//           |                 |
//
//
//   Bhargavi Nisarga
//   Texas Instruments Inc.
//   April 2009
//   Built with CCSv4 and IAR Embedded Workbench Version: 4.21
//******************************************************************************

#include <msp430.h>

int main(void)
{
  unsigned long * Flash_ptrD;               // Initialize Flash pointer Seg D
  unsigned long value;
  WDTCTL = WDTPW+WDTHOLD;                   // Stop WDT

  Flash_ptrD = (unsigned long *) 0x1800;    // Initialize Flash pointer
  value = 0x12345678;                       // Initialize Value
  FCTL3 = FWKEY;                            // Clear Lock bit
  FCTL1 = FWKEY+ERASE;                      // Set Erase bit
  *Flash_ptrD = 0;                          // Dummy write to erase Flash seg
  FCTL1 = FWKEY+BLKWRT;                     // Enable long-word write
  *Flash_ptrD = value;                      // Write to Flash
  FCTL1 = FWKEY;                            // Clear WRT bit
  FCTL3 = FWKEY+LOCK;                       // Set LOCK bit
  while(1);                                 // Loop forever, SET BREAKPOINT HERE
}

测试过程

1 在CCS内新建工程，写入代码，编译成功后连接开发板调试

可以发现程序运行后，0x1800处已经成功写入数据

2 而后板子断电，而后重新连接电脑上的uniflash来读memory，数据依然存在

在MSP430F5529中，0x1800是information memory的D