Create assignment2code.prog

programs/assignment2code.prog

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+reset:
+br always >main
+nop
+hardfault:
+reti
+nop
+memfault:
+reti
+nop
+
+.align
+addr:
+.word 0x000F0000
+//w_cnt_top:	.word 0x1FC000
+w_cnt_top:	.word 0x1		//for simulation only
+
+main:
+ldr r0,>addr	//LED addr
+addi r6,8		//outer counter top
+clr r7			//wait counter
+ldr r8,>w_cnt_top
+
+out_loop:
+clr r1
+st08 r0,r1
+call >wait
+nop
+
+fill:
+	lsh r1,r1,1
+	addi r1,1
+	st08 r0,r1
+	call >wait
+	nop
+
+	addi r5,1
+	cmp neq r5,r6
+	br true >fill
+	nop
+	clr r5
+
+flush:
+	lsh r1,r1,1
+	st08 r0,r1
+	call >wait
+	nop
+
+	addi r5,1
+	cmp neq r5,r6
+	br true >flush
+	nop
+	clr r5
+	br always >out_loop
+	nop
+
+//subroutine to iterate until counter overflow
+wait:
+	clr r7				//inititalize inner counter
+	inc_i:
+	cmp neq r7,r8
+	br true >inc_i		//if i=cnt_top
+	addi r7,1
+	ret					//else
+	nop