// Internal pullup enabled on P1.4.. Dang // Texas Instruments Inc.
Trang 1//****************************************************************************** // MSP430G2xx1 Demo - P1 Interrupt from LPM4 with Internal Pull-up
//
// Description: A hi/low transition on P1.4 will trigger P1_ISR which,
// toggles P1.0 Normal mode is LPM4 ~ 0.1uA
// Internal pullup enabled on P1.4
// ACLK = n/a, MCLK = SMCLK = default DCO
//
// MSP430G2xx1
//
-// /|\|
XIN|-// | | |
// |RST
XOUT|-// /|\ | R |
// o | P1.4-o P1.0| >LED
// \|/
//
// D Dang
// Texas Instruments Inc
// October 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430g2231.h>
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
P1DIR = 0x01; // P1.0 output, else input
P1OUT = 0x10; // P1.4 set, else reset
P1REN |= 0x10; // P1.4 pullup
P1IE |= 0x10; // P1.4 interrupt enabled
P1IES |= 0x10; // P1.4 Hi/lo edge
P1IFG &= ~0x10; // P1.4 IFG cleared
_BIS_SR(LPM4_bits + GIE); // Enter LPM4 w/interrupt
}
// Port 1 interrupt service routine
#pragma vector=PORT1_VECTOR
interrupt void Port_1(void)
{
P1OUT ^= 0x01; // P1.0 = toggle
P1IFG &= ~0x10; // P1.4 IFG cleared
}