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利用 information memory 保存数据;原始数据通过编程器下载进去,程序如下:
#pragma location = 0x1040
__root const uint8_t INFO_1[64] = {。。。。。}
现在发现一部分MCU上电读出来的数据有FF FE之类的乱码,上电只读没有写操作。
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
/* --COPYRIGHT--,BSD_EX * Copyright (c) 2012, Texas Instruments Incorporated * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * * Neither the name of Texas Instruments Incorporated nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ******************************************************************************* * * MSP430 CODE EXAMPLE DISCLAIMER * * MSP430 code examples are self-contained low-level programs that typically * demonstrate a single peripheral function or device feature in a highly * concise manner. For this the code may rely on the device's power-on default * register values and settings such as the clock configuration and care must * be taken when combining code from several examples to avoid potential side * effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware * for an API functional library-approach to peripheral configuration. * * --/COPYRIGHT--*/ //****************************************************************************** // 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