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Файл:Микропроцессорная техника / MSP430G2xx3_Code_Examples / msp430g2xx3_lpm3_vlo
.c/* --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:
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* * 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
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*******************************************************************************
*
* 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--*/
//******************************************************************************
// MSP430G2xx3 Demo - Basic Clock, LPM3 Using WDT ISR, VLO ACLK
//
// Description: This program operates MSP430 normally in LPM3, pulsing P1.0
// ~ 6 second intervals. WDT ISR used to wake-up system. All I/O configured
// as low outputs to eliminate floating inputs. Current consumption does
// increase when LED is powered on P1.0. Demo for measuring LPM3 current.
// ACLK = VLO/2, MCLK = SMCLK = default DCO
//
//
// MSP430G2xx3
// ---------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// | P1.0|-->LED
//
// D. Dang
// Texas Instruments Inc.
// December 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430.h>
int main(void)
{
BCSCTL1 |= DIVA_1; // ACLK/2
BCSCTL3 |= LFXT1S_2; // ACLK = VLO
WDTCTL = WDT_ADLY_1000; // Interval timer
IE1 |= WDTIE; // Enable WDT interrupt
P1DIR = 0xFF; // All P1.x outputs
P1OUT = 0; // All P1.x reset
P2DIR = 0xFF; // All P2.x outputs
P2OUT = 0; // All P2.x reset
while(1)
{
int i;
P1OUT |= 0x01; // Set P1.0 LED on
for (i = 10000; i>0; i--); // Delay
P1OUT &= ~0x01; // Reset P1.0 LED off
_BIS_SR(LPM3_bits + GIE); // Enter LPM3
}
}
#pragma vector=WDT_VECTOR
__interrupt void watchdog_timer (void)
{
_BIC_SR_IRQ(LPM3_bits); // Clear LPM3 bits from 0(SR)
}
Соседние файлы в папке MSP430G2xx3_Code_Examples