?? msp430x54x_rtc_01.c
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//******************************************************************************
// msp430FG5438 Demo - Real Time Clock, Toggle P1.0 Inside ISR, 32kHz ACLK
//
// Description: This program toggles P1.0 by xor'ing P1.0 inside of
// a Real Time Clock ISR. The Real Time Clock ISR is called once a minute using
// the Alarm function provided by the RTC. ACLK used to clock basic timer.
// ACLK = REFO = 32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz
//
// msp430FG5438
// -----------------
// /|\| |
// | | |
// --|RST |
// | |
// | P1.0|-->LED
//
// M Smertneck
// Texas Instruments Inc.
// April 2008
// Built with CCEv3.2 IAR Embedded Workbench Version: 3.42A
//******************************************************************************
#include <msp430x54x.h>
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop Watchdog Timer
RTCCTL01 = RTCBCD+RTCHOLD+RTCMODE+RTCTEVIE+RTCAIE;
// RTC enable, BCD mode,
// alarm every Minute,
// enable RTC interrupt
// Init time
RTCSEC = 0x00; // Set Seconds
RTCMIN = 0x32; // Set Minutes
RTCHOUR = 0x10; // Set Hours
// Init date
RTCDOW = 0x03; // Set DOW
RTCDAY = 0x30; // Set Day
RTCMON = 0x04; // Set Month
RTCYEAR = 0x2008; // Set Year
RTCCTL01 &= ~RTCHOLD; // Enable RTC
P1DIR |= 0x01; // Set P1.0 to output direction
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/ interrupt
}
// Basic Timer interrupt service routine
#pragma vector=RTC_VECTOR
__interrupt void RTC(void)
{
P1OUT ^= 0x01; // Toggle P1.0 using exclusive-OR
RTCCTL01 &= ~RTCTEVIFG;
}
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