1# 512365098
可以参考下面的代码。
//******************************************************************************
// MSP430F20xx 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 *//
//
// MSP430F20xx
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
//
// M. Mitchell / M.Buccini
// Texas Instruments Inc.
// December 2005
// Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.40A
//******************************************************************************
#include <msp430x20x3.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; // Stop watchdog timer
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 = 0; // 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
}
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