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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--*/
+//******************************************************************************
+//  MSP430F20x2 Demo - ADC10, Sample A10 Temp, Set P1.0 if Temp ++ ~2C
+//
+//  Description: se ADC10 and the integrated temperature sensor to detect
+//  temperature gradients. The temperature sensor output voltage is sampled
+//  ~ every 120ms and compared with the defined delta values using an ISR.
+//  (ADC10OSC/4)/64 determines sample time which needs to be greater than
+//  30us for temperature sensor.
+//  ADC10 is operated in repeat-single channel mode with the sample and
+//  convert trigger sourced from Timer_A CCR1. The ADC10IFG at the end
+//  of each converstion will trigger an ISR.
+//  ACLK = n/a, MCLK = SMCLK = default DCO ~ 1.2MHz, ADC10CLK = ADC10OSC
+//
+//                MSP430F20x2
+//             -----------------
+//         /|\|              XIN|-
+//          | |                 |
+//          --|RST          XOUT|-
+//            |                 |
+//            |A10          P1.0|-->LED
+//
+//  L. Westlund
+//  Texas Instruments Inc.
+//  May 2006
+//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.41A
+//******************************************************************************
+#include <msp430.h>
+
+static unsigned int FirstADCVal;            // holds 1st ADC result
+
+#define ADCDeltaOn       3                  // ~ 2 Deg C delta for LED on
+
+int main(void)
+{
+  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog
+  ADC10CTL1 = ADC10DIV_3 + INCH_10 + SHS_1 + CONSEQ_2;  // TA trig., rpt, A10
+  ADC10CTL0 = SREF_1 + ADC10SHT_3 + REF2_5V + ADC10IE + REFON + ADC10ON;
+  __enable_interrupt();                     // Enable interrupts.
+  TACCR0 = 30;                              // Delay to allow Ref to settle
+  TACCTL0 |= CCIE;                          // Compare-mode interrupt.
+  TACTL = TASSEL_2 | MC_1;                  // TACLK = SMCLK, Up mode.
+  LPM0;                                     // Wait for delay.
+  TACCTL0 &= ~CCIE;                         // Disable timer Interrupt
+  __disable_interrupt();
+  ADC10CTL0 |= ENC;
+  TACCTL1 = OUTMOD_4;                       // Toggle on EQU1 (TAR = 0)
+  TACTL = TASSEL_2 + MC_2;                  // SMCLK, cont-mode
+  while (!(ADC10IFG & ADC10CTL0));          // First conversion?
+  FirstADCVal = ADC10MEM;                   // Read out 1st ADC value
+  P1OUT = 0x00;                             // Clear P1
+  P1DIR = 0x01;                             // P1.0 as output
+  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0 w/ interrupt
+}
+
+#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
+#pragma vector=ADC10_VECTOR
+__interrupt void ADC10_ISR (void)
+#elif defined(__GNUC__)
+void __attribute__ ((interrupt(ADC10_VECTOR))) ADC10_ISR (void)
+#else
+#error Compiler not supported!
+#endif
+{
+  if (ADC10MEM >= FirstADCVal + ADCDeltaOn)
+    P1OUT |= 0x01;                          // LED on
+  else
+    P1OUT &= ~0x01;                         // LED off
+}
+
+#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
+#pragma vector=TIMERA0_VECTOR
+__interrupt void ta0_isr(void)
+#elif defined(__GNUC__)
+void __attribute__ ((interrupt(TIMERA0_VECTOR))) ta0_isr (void)
+#else
+#error Compiler not supported!
+#endif
+{
+  TACTL = 0;
+  LPM0_EXIT;                                // Exit LPM0 on return
+}