add additional memory section

memory.x

@@ -12,3 +12,12 @@ MEMORY
 /* SRAM_0 can be used for all busses: Instruction, Data and System */
 /* SRAM_1 only supports the system bus */
 _stack_start = ORIGIN(RAM) + LENGTH(RAM);
+
+/* Define sections for placing symbols into the extra memory regions above.   */
+/* This makes them accessible from code.                                      */
+SECTIONS {
+  .sram1 (NOLOAD) : ALIGN(8) {
+    *(.sram1 .sram1.*);
+    . = ALIGN(4);
+    } > SRAM_1
+};