w1.1_lab1.1

lab1.1/main.asm

@@ -0,0 +1,33 @@
+@ this code produces the same binary as listing 1
+
+  .syntax unified
+  .cpu cortex-m4
+  .thumb
+  .text
+  .global main
+main:
+   MOVS.N  R0, #8
+   LDR.N   R1, =0X40023830
+   STR.N   R0, [R1, #0]
+
+   MOVS.N  R0, #0X55
+   LSLS.N  R0, R0, #24
+   LDR.N   R1, =0X40020C00
+   STR.N   R0, [R1, #0]
+
+   MOVS.N  R0, #0
+   LDR.N   R1, =0X40020C14
+   STR.N   R0, [R1, #0]
+
+   MOVS.N  R3, #15
+   LSLS.N  R3, R3, #12
+
+loop:
+   LDR.N   R2, =0X00145854
+delay:
+   SUBS.N  R2, #1
+   BNE.N   delay
+updateLed:
+   EORS.N  R0, R3
+   STR.N   R0, [R1, #0]
+   B.N     loop