solved Task 3.2

bcd/app/main.s

@@ -117,15 +117,45 @@ EndCalcByMult
 		; Add Bin Value in higher Byte in R0
 		LSLS	R2, R2, #8
 		ORRS	R0, R0, R2
-
 		
-		; Show R0 on LEDs
-		LDR		R2, =ADDR_LED_15_0
-		STRH	R0, [R2]
+		; Show R0 on LEDs 15-0
+		LDR		R3, =ADDR_LED_15_0
+		STRH	R0, [R3]
 		
 		; Show R0 on 7-Segment
-		LDR		R2, =ADDR_7_SEG_BIN_DS3_0
-		STRH	R0, [R2]
+		LDR		R3, =ADDR_7_SEG_BIN_DS3_0
+		STRH	R0, [R3]
+		
+		; Count positive Bits in Higher Byte of R2 to R1
+		LDR		R1, =0							; initialize R1 with 0
+		LDR		R3, =0x1						; mask to set first bit and to substract counter
+		LDR		R4, =9							; counter for loop
+		LSLS	R2, R2, #16
+CheckBitLoop
+		SUBS	R4, R4, R3
+		BEQ		EndCheckBitLoop					; goto EndCheckBitLoop if R4 (counter) = 0
+		LSLS	R2, R2, #1						; Shift Bits in R2
+		BCC		CheckBitLoop					; goto CheckBitLoop if carry = 0
+		ORRS	R1, R3							; Add Carry to R1
+		LSLS	R1, R1, #1						; Shift Bits in R1
+		B		CheckBitLoop					; goto checkBitLoop
+EndCheckBitLoop
+		LSRS	R1, R1, #1						; Shift Bits in R1
+
+		; Rotate LEDs 31-16
+		LDR		R2, =ADDR_LED_31_16
+		LDR		R4, =17							; Counter for LedRotationLoop
+LedRotationLoop
+		SUBS	R4, R4, R3
+		BEQ		EndLedRotationLoop				; goto EndCheckBitLoop if R4 (counter) = 0
+		BL		pause
+		STRH	R1, [R2]						; Show R1 on LEDs 31-16
+		MOV		R5, R1							; Coppy R1 to R5
+		LSLS	R5, R5, #16						; Shift Bits in R5
+		ORRS	R1, R1, R5						; Coppy lower bytes of R1 in upper bytes in R1
+		RORS	R1, R1, R3
+		B		LedRotationLoop
+EndLedRotationLoop
 
 ; END: To be programmed