#include <msp430x16x.h>
// Global variables
char value = 0; // 8-bit value to write to segment A
char* Flash_ptr; // Flash pointer
char* RAM_ptr; // RAM pointer
char* END_ptr; // End of FlashWrite routine
// Function prototypes
void FlashWrite();
void CopyRoutine();
void End_of_FlashWrite();
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
_DINT(); // Diable Interrupts
CopyRoutine(); // Copy FlashWrite routine to RAM
_EINT(); // Enable Interrupts
while(1) // Repeat forever
{
Flash_ptr = (char *) 0x1000; // Initialize Flash pointer
FCTL2 = FWKEY + FSSEL1 + FN0; // MCLK/2 for Flash Timing Generator
FCTL1 = FWKEY + ERASE; // Set Erase bit
FCTL3 = FWKEY; // Clear Lock bit
*Flash_ptr = 0; // Dummy write to erase Flash segment
while(!(FCTL3 & WAIT)); // WAIT until Flash is ready
asm("CALL #300h"); // Execute FlashWrite from RAM
// Inline Assembly
value++; // Increment value
_NOP(); // SET BREAKPOINT HERE
}
}
void CopyRoutine()
{
Flash_ptr = (char*)FlashWrite; // Set pointer to FlashWrite routine
RAM_ptr = (char*)0x0300; // Set pointer to RAM
END_ptr = (char*)End_of_FlashWrite; // Set pointer to End_of_FlashWrite
while(END_ptr != Flash_ptr) // Check for end of FlashWrite
{
*RAM_ptr = *Flash_ptr; // Copy word to RAM
Flash_ptr++; // Increment Flash pointer
RAM_ptr++; // Increment RAM pointer
}
}
void FlashWrite()
{
volatile int i; // Use as write counter
Flash_ptr = (char*)0x1000; // Initialize Flash pointer
while(FCTL3 & BUSY); // Check Flash BUSY bit
FCTL1 = FWKEY + BLKWRT + WRT; // Enable block-write operation
for(i = 0; i < 64; i++)
{
*Flash_ptr = value; // Write value to flash
Flash_ptr++; // Double-increment Flash pointer
while(!(FCTL3 & WAIT)); // WAIT until Flash is ready
}
FCTL1 = FWKEY; // Clear BLKWRT & WRT bits
while(FCTL3 & BUSY); // Check Flash BUSY bit
FCTL3 = FWKEY + LOCK; // Reset LOCK bit
return; // Exits routine
}
void End_of_FlashWrite(){} // Marks end of FlashWrite
此帖出自
小平头技术问答
{
*RAM_ptr = *Flash_ptr; // Copy word to RAM
Flash_ptr++; // Increment Flash pointer
RAM_ptr++; // Increment RAM pointer
}
}
循环拷贝,一直到end,
主函数里的
asm("CALL #300h"); // Execute FlashWrite from RAM
跳转到0X300
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