/* --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--*/ //****************************************************************************** // MSP430F20xx Demo - WDT+ Failsafe Clock, DCO SMCLK // // Description; Allow WDT+ in watchdog to timeout. Toggle P1.0 in main // funnction. LPM4 is entered, this example will demonstrate WDT+ feature // of preventing WDT+ clock to be disabled. // The WDT+ will not allow active WDT+ clock to be disabled by software, the // LED continues to Flash because the WDT times out normally even though // software has attempted to disable WDT+ clock source. // The MSP430F1xx will stop code execution when software disables WDT+ clock // source. // ACLK = n/a, MCLK = SMCLK = default DCO // // MSP430F20xx // ----------------- // /|\| XIN|- // | | | // --|RST XOUT|- // | | // | P1.0|-->LED // // M. Buccini / L. Westlund // Texas Instruments Inc. // October 2005 // Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.40A //****************************************************************************** #include int main(void) { P1DIR |= 0x01; // Set P1.0 to output P1OUT ^= 0x01; // Toggle P1.0 __bis_SR_register(LPM4_bits); // Stop all clocks }