MSP430F5418的RTC设置问题

使用RTC实现日历功能，BCD编码格式。在设置月份和天的时候会出现写不进去（寄存器值不变）。初始化代码如下：

Maka Luo：

参考以下例程试试先

/* –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–*///******************************************************************************// MSP430F54xA Demo – RTC_A in real time clock mode//// Description: This program demonstrates the RTC mode by triggering an// interrupt every second and minute. This code toggles P1.0 every second.// This code recommends an external LFXT1 crystal for RTC accuracy.// ACLK = LFXT1 = 32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz//// MSP430F54xA// —————–// /|\ | XIN|-// | | | 32kHz// —|RST XOUT|-// | |// | P1.0 |–> Toggles every second// | |//// W. Goh// Texas Instruments Inc.// April 2010// Built with CCS version 4.2 and IAR Embedded Workbench Version: 4.21.8//******************************************************************************

#include <msp430.h>

int main(void){ WDTCTL = WDTPW + WDTHOLD; // Stop Watchdog Timer P1DIR |= BIT0; // Set P1.0 as output

// Initialize LFXT1 P7SEL |= 0x03; // Select XT1 UCSCTL6 &= ~(XT1OFF); // XT1 On UCSCTL6 |= XCAP_3; // Internal load cap

// Loop until XT1,XT2 & DCO fault flag is cleared do { UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + XT1HFOFFG + DCOFFG); // Clear XT2,XT1,DCO fault flags SFRIFG1 &= ~OFIFG; // Clear fault flags }while (SFRIFG1&OFIFG); // Test oscillator fault flag

// Configure RTC_A RTCCTL01 |= RTCTEVIE + RTCRDYIE + RTCBCD + RTCHOLD + RTCMODE; // RTC enable, BCD mode, RTC hold // enable RTC read ready interrupt // enable RTC time event interrupt

RTCYEAR = 0x2010; // Year = 0x2010 RTCMON = 0x4; // Month = 0x04 = April RTCDAY = 0x05; // Day = 0x05 = 5th RTCDOW = 0x01; // Day of week = 0x01 = Monday RTCHOUR = 0x10; // Hour = 0x10 RTCMIN = 0x32; // Minute = 0x32 RTCSEC = 0x45; // Seconds = 0x45

RTCADOWDAY = 0x2; // RTC Day of week alarm = 0x2 RTCADAY = 0x20; // RTC Day Alarm = 0x20 RTCAHOUR = 0x10; // RTC Hour Alarm RTCAMIN = 0x23; // RTC Minute Alarm

RTCCTL01 &= ~(RTCHOLD); // Start RTC calendar mode

__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 mode with interrupts // enabled __no_operation();}

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)#pragma vector=RTC_VECTOR__interrupt void RTC_ISR(void)#elif defined(__GNUC__)void __attribute__ ((interrupt(RTC_VECTOR))) RTC_ISR (void)#else#error Compiler not supported!#endif{ switch(__even_in_range(RTCIV,16)) { case RTC_NONE: // No interrupts break; case RTC_RTCRDYIFG: // RTCRDYIFG P1OUT ^= 0x01; // Toggles P1.0 every second break; case RTC_RTCTEVIFG: // RTCEVIFG __no_operation(); // Interrupts every minute break; case RTC_RTCAIFG: // RTCAIFG break; case RTC_RT0PSIFG: // RT0PSIFG break; case RTC_RT1PSIFG: // RT1PSIFG break; case 12: break; // Reserved case 14: break; // Reserved case 16: break; // Reserved default: break; }}

Tony Lii：

回复 Maka Luo:

中断处理函数用来做什么的？还有就是，经常存不进去，写改变不了。

zhifang yang1：

你都已经用Struct，贴一下g_now的结构呢？

driverlib 里有个和你这个类似的Calendar 结构，建议你用driverlib。

Tony Lii：

回复 zhifang yang1:

结构体是这样定义的：

typedef struct{ unsigned int Year; unsigned char Month; unsigned char Day; unsigned char Hour; unsigned char Min; unsigned char Sec;}DateTime;