#include "msp430x24x.h"
unsigned char value; // 8-bit value to write to seg C typedef
// 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 0x10FF 0x10FE
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
__no_operation(); // SET BREAKPOINT HERE
}
}
void write_SegC(char value)
{
char *Flash_ptr; // Flash pointer
unsigned int i;
Flash_ptr = (char *)0x1040; // Initialize Flash pointer
FCTL3 = FWKEY; // Clear Lock bit
FCTL1 = FWKEY + ERASE; // Set Erase bit
*Flash_ptr = 0; // Dummy write to erase Flash seg
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 ptr
Flash_ptrD = (char *)0x1000; // Initialize Flash segment D ptr
FCTL3 = FWKEY; // Clear Lock bit
FCTL1 = FWKEY + ERASE; // Set Erase bit
*Flash_ptrD = 0; // Dummy write to erase Flash seg 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 seg D
}
FCTL1 = FWKEY; // Clear WRT bit
FCTL3 = FWKEY + LOCK; // Set LOCK bit
}
