Add ES/Lab/LAB4/HEXtoASCII

ES/Lab/LAB4/HEXtoASCII

@@ -0,0 +1,37 @@
+	AREA RESET, DATA, READONLY
+	EXPORT __Vectors
+__Vectors
+	DCD 0x10001000
+	DCD Reset_Handler
+	ALIGN
+	
+	AREA MYCODE, CODE, READONLY
+	ENTRY
+	EXPORT Reset_Handler
+
+Reset_Handler
+	LDR R0, =SRC
+	LDR R1, [R0]
+	LDR R3, =DST
+	MOV R10, #8
+	
+UP
+	AND R2, R1, #0x0F
+	CMP R2, #09
+	BCC DOWN
+	ADD R2, #7
+	
+DOWN
+	ADD R2, #0x30
+	STR R2, [R3], #4
+	LSR R1, #4
+	SUBS R10, #1
+	BNE UP
+	
+SRC DCD 0x12AB34CF
+	
+	AREA mydata, DATA, READWRITE
+
+DST DCD 0
+
+	END