Function flash_program_sector

Bootloader/flash.c:111–149

}

int flash_program_sector( uintptr_t addr, size_t len )
{
	if ( len != USB_DFU_TRANSFER_SIZE )
		return 1;

#if defined(_mk20dx128vlf5_) || defined(_mk20dx128vlh7_)
	// Check if this is the beginning of a sector
	// Only erase if necessary
	if ( (addr & (FLASH_SECTOR_SIZE - 1)) == 0
		&& flash_read_1s_sector( addr, FLASH_SECTOR_SIZE / 4 )
		&& flash_erase_sector( addr ) )
			return 1;

	// Program sector (longword)
	return flash_program_section( addr, FLASH_SECTOR_SIZE / 4 );
#elif defined(_mk20dx256vlh7_)
	// Check if beginning of sector and erase if not empty
	// Each sector is 2 kB in length, but we can only write to half a sector at a time
	// We can only erase an entire sector at a time
	if ( (addr & (FLASH_SECTOR_SIZE - 1)) == 0
		&& flash_read_1s_sector( addr, FLASH_SECTOR_SIZE / 8 )
		&& flash_erase_sector( addr ) )
			return 1;

	// Program half-sector (phrases)
	return flash_program_section( addr, FLASH_SECTOR_SIZE / 16 );
#elif defined(_mk22fx512avlh12_)
	// Check if beginning of sector and erase if not empty
	// Each sector is 4 kB in length, but we can only write to half a sector at a time
	// We can only erase an entire sector at a time
	if ( (addr & (FLASH_SECTOR_SIZE - 1)) == 0
		&& flash_read_1s_sector( addr, FLASH_SECTOR_SIZE / 16 )
		&& flash_erase_sector( addr ) )
			return 1;

	// Program half-sector (double phrases)
	return flash_program_section( addr, FLASH_SECTOR_SIZE / 32 );
#endif
}

int flash_prepare_reading()
{