MEMORY {	flash	: ORIGIN = 0x30020000, LENGTH = 0x00004000	ram 	: ORIGIN = 0x003c0000, LENGTH = 0x0003ffff  /* last 256Kbytes of dram */}SECTIONS {        .text : {		_stext = . ;        	*(.text)		*(.rodata)		_etext = . ;        } > flash        .data : AT (ADDR(.text) + SIZEOF(.text)) {		_sdata = . ;        	*(.data)		_edata = . ;        } > ram        .bss : AT (ADDR(.text) + SIZEOF(.text) + SIZEOF(.data)) {		_sbss = . ;		*(.bss)		*(COMMON)		_ebss = . ;	} > ram}