技术说明
以上的图片是Gx2xx数据手册中flash的截图!表明一个器件内部flash的分布!
具体的flash大小可以查看对应的用户手册!如上图所示:
实例代码
下面是TI的实例代码,其操作流程可以对照数据手册上说明!
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
}