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+; --COPYRIGHT--,BSD_EX
+;  Copyright (c) 2012, Texas Instruments Incorporated
+;  All rights reserved.
+; 
+;  Redistribution and use in source and binary forms, with or without
+;  modification, are permitted provided that the following conditions
+;  are met:
+; 
+;  *  Redistributions of source code must retain the above copyright
+;     notice, this list of conditions and the following disclaimer.
+; 
+;  *  Redistributions in binary form must reproduce the above copyright
+;     notice, this list of conditions and the following disclaimer in the
+;     documentation and/or other materials provided with the distribution.
+; 
+;  *  Neither the name of Texas Instruments Incorporated nor the names of
+;     its contributors may be used to endorse or promote products derived
+;     from this software without specific prior written permission.
+; 
+;  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+;  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+;  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+;  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+;  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+;  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+;  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+;  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+;  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+;  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+;  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+; 
+; ******************************************************************************
+;  
+;                        MSP430 CODE EXAMPLE DISCLAIMER
+; 
+;  MSP430 code examples are self-contained low-level programs that typically
+;  demonstrate a single peripheral function or device feature in a highly
+;  concise manner. For this the code may rely on the device's power-on default
+;  register values and settings such as the clock configuration and care must
+;  be taken when combining code from several examples to avoid potential side
+;  effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
+;  for an API functional library-approach to peripheral configuration.
+; 
+; --/COPYRIGHT--
+;*******************************************************************************
+;   MSP430F20x1 Demo - Comp_A, Detect Threshold, Set P1.0 if P1.1 > 0.25*Vcc
+;
+;   Description: Use comparator_A to detect a voltage threshold. Using an
+;   external potentiometer, an unknown analog voltage is applied to P1.1.
+;   Comparator_A compares the unknown voltage to an internal reference
+;   voltage, in this example 0.25*VCC.  If the interesting voltage is higher
+;   than 0.25*Vcc, P1.0 is set, if not, P1.0 is reset.
+;   ACLK = n/a, MCLK = SMCLK = default
+;
+;                MSP430F20x1
+;             -----------------
+;        /|\ |              XIN|-
+;         |  |                 |
+;         ---|RST          XOUT|-
+;         |  |                 |
+;         R<-|P1.1/CA1     P1.0|--> LED
+;         |  |                 |			
+;         ---|VSS
+;
+;   M. Buccini / L. Westlund
+;   Texas Instruments Inc.
+;   December 2005
+;   Built with IAR Embedded Workbench Version: 3.40A
+;*******************************************************************************
+#include <msp430.h>
+;-------------------------------------------------------------------------------
+            ORG     0F800h                  ; Program Reset
+;-------------------------------------------------------------------------------
+RESET       mov.w   #0280h,SP               ; Initialize stackpointer
+StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
+SetupP1     bis.b   #001h,&P1DIR            ; P1.0 = output
+            mov.b   #CARSEL+CAREF0+CAON,&CACTL1   ; 0.25Vcc = -comp, on
+            mov.b   #P2CA4,&CACTL2          ; P1.1/CA1 = +comp
+                                            ;	
+Mainloop    bit.b   #CAOUT,&CACTL2          ; Test comparator_A output
+            jz      OFF                     ; jmp--> if CAOUT reset
+                                            ;
+ON          bis.b   #001h,&P1OUT            ; P1.0 = 1
+            jmp     Mainloop                ;
+OFF         bic.b   #001h,&P1OUT            ; P1.0 = 0
+            jmp     Mainloop                ;
+                                            ;
+;-------------------------------------------------------------------------------
+;           Interrupt Vectors
+;-------------------------------------------------------------------------------
+            ORG     0FFFEh                  ; MSP430 RESET Vector
+            DW      RESET                   ;
+            END