【转】Launchpad msp430 Flash探索

只看该作者 · 2016-11-15 23:43

//******************************************************************************
//  MSP430G2xx1 Demo - Flash In-System Programming, Copy SegC to SegD
//
//  Description: This program first erases flash seg C, then it increments all
//  values in seg C, then it erases seg D, then copies seg C to seg D.
//  Assumed MCLK 771kHz - 1428kHz.
//  //* Set Breakpoint on NOP in the Mainloop to avoid Stressing Flash *//
//
//             MSP430G2xx1
//          -----------------
//       /|\|             XIN|-
//       | |                |
//       --|RST       XOUT|-
//          |                |
//
//  D. Dang
//  Texas Instruments Inc.
//  October 2010
//  Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************

#include <msp430g2231.h>

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

// Function prototypes
void write_SegC (char value);
void copy_C2D (void);

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                // 关闭看门狗
//  if (CALBC1_1MHZ ==0xFF || CALDCO_1MHZ == 0xFF)
//  {
// while(1);                            // If calibration constants erased
                                          // do not load, trap CPU!!
//  }
  BCSCTL1 = CALBC1_1MHZ;                   // Set DCO to 1MHz
  DCOCTL = CALDCO_1MHZ;
  FCTL2 = FWKEY + FSSEL0 + FN1;          // MCLK/3 for Flash Timing Generator
  value = 1;                               // initialize value

  while(1)                               // Repeat forever
  {
write_SegC(value++);                   // Write segment C, increment value
copy_C2D();                            // Copy segment C to D
_NOP();                               // SET BREAKPOINT HERE
  }
}

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

  Flash_ptr = (char *) 0x1040;             // 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<64; i++)
  {
*Flash_ptr++ = value;                // Write value to flash
  }

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

void copy_C2D (void)
{
  char *Flash_ptrC;                      // Segment C pointer
  char *Flash_ptrD;                      // Segment D pointer
  unsigned int i;

  Flash_ptrC = (char *) 0x1040;          // Initialize Flash segment C pointer
  Flash_ptrD = (char *) 0x1000;          // Initialize Flash segment D pointer
  FCTL1 = FWKEY + ERASE;                   // Set Erase bit
  FCTL3 = FWKEY;                         // Clear Lock bit
  *Flash_ptrD = 0;                         // Dummy write to erase Flash segment D
  FCTL1 = FWKEY + WRT;                   // Set WRT bit for write operation

  for (i=0; i<64; i++)
  {
*Flash_ptrD++ = *Flash_ptrC++;       // copy value segment C to segment D
  }

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

【转】Launchpad msp430 Flash探索

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