void copy_ram_to_flash (uint32_t dest_flash_addr, uint32_t source_ram_addr, uint16_t num_bytes)
{

	if (num_bytes > 1024)
		num_bytes = 4096;
	else if (num_bytes > 512)
		num_bytes = 1024;
	else if (num_bytes > 256)
		num_bytes = 512;
	else
		num_bytes = 256;

	command[0] = COPY_RAM_TO_FLASH;
	command[1] = dest_flash_addr;
	command[2] = source_ram_addr;
	command[3] = num_bytes;
	command[4] = __CORE_CLK  / 1000;

	iap_entry (command, result);
}