[求助] msp430fr5969 使用32K外部晶振定时唤醒LPM3,官方例程。

maylove 2014-9-22 15:58 楼主

这是我在网站找的，不知道大家是否有需要！

/* --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--*/
//******************************************************************************
// MSP430FR59x Demo - TimerB, Toggle P1.0, CCR0 UP Mode ISR, 32KHz ACLK
//
// Description: Toggle P1.0 using software and TB ISR. TimerB is
// configured for UP mode, thus the timer overflows when TBR counts
// to CCR0.
// ACLK = TACLK = 32768Hz, MCLK = SMCLK = default DCO = ~1MHz
//
//
// MSP430FR5969
// ---------------
// /|\| |
// | | |
// --|RST |
// | |
// | P1.0|-->LED
//
// T. Witt/ P. Thanigai
// August 2012
// Built with IAR Embedded Workbench V5.30 & Code Composer Studio V5.2
//******************************************************************************
#include <msp430.h>
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // Stop WDT
// XT1 Setup
PJSEL0 |= BIT4 + BIT5;
CSCTL0_H = 0xA5;
CSCTL2 = SELA_0 + SELS_3 + SELM_3; // set ACLK = XT1; MCLK = DCO
CSCTL3 = DIVA_0 + DIVS_0 + DIVM_0; // set all dividers
CSCTL4 |= LFXTDRIVE_0;
CSCTL4 &= ~LFXTOFF;
do
{
CSCTL5 &= ~LFXTOFFG;
// Clear XT1 fault flag
SFRIFG1 &= ~OFIFG;
}while (SFRIFG1&OFIFG); // Test oscillator fault flag
P1DIR |= BIT0; // LED interrupt
P1OUT |= BIT0;
TB0CCTL0 = CCIE; // TBCCR0 interrupt enabled
TB0CCR0 = 50000;
TB0CTL = TBSSEL_1 + MC_1; // ACLK, continuous mode
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/ interrupt
}
// Timer B1 interrupt service routine
#pragma vector = TIMER0_B0_VECTOR
__interrupt void Timer0_B0_ISR(void)
{
P1OUT ^= BIT0;
}