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MSP430 flash写入(二)

2022-09-07 来源:csdn

/* --COPYRIGHT--,BSD_EX

 * Copyright (c) 2012, Texas Instruments Incorporated

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 *                       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

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 * 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.

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 * --/COPYRIGHT--*/

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

//  MSP430F552x 例程 - Flash In-System Programming w/ 在地址0x1800长字写入

// 这段程序首先擦除flash seg D, 然后在地址0x1800写入一个32-bit的数据

//  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


int main(void)

{

  unsigned long * Flash_ptrD;               // 初始化Seg D指针

  unsigned long value;

  WDTCTL = WDTPW+WDTHOLD;                   // 关闭看门狗


  Flash_ptrD = (unsigned long *) 0x1800;    // 初始化Flash pointer

  value = 0x12345678;                       // 初始化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

}

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