PIC RTCC编程.doc

PIC24FJ单片机RTCC程序有感(2008-08-05 18:08:41)转载标签：杂谈分类：IC程序RTCC很是简单，但是别人写出来就太漂亮了，要借鉴的太多太多。工程实用* ?2007 Microchip Technology Inc.* FileName:RTCC.c* Dependencies:Header (.h) files if applicable, see below* Processor:PIC24Fxxxx* Compiler:MPLAB?C30 v3.00 or higher* SOFTWARE LICENSE AGREEMENT:* Microchip Technology Incorporated (Microchip) retains all* ownership and intellectual property rights in the code accompanying* this message and in all derivatives hereto.You may use this code,* and any derivatives created by any person or entity by or on your* behalf, exclusively with Microchips proprietary products.Your* acceptance and/or use of this code constitutes agreement to the* terms and conditions of this notice.* CODE ACCOMPANYING THIS MESSAGE IS SUPPLIED BY MICROCHIP AS IS. NO* WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT* NOT LIMITED TO, IMPLIED WARRANTIES OF NON-INFRINGEMENT,* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS* CODE, ITS INTERACTION WITH MICROCHIPS PRODUCTS, COMBINATION WITH* ANY OTHER PRODUCTS, OR USE IN ANY APPLICATION.* YOU ACKNOWLEDGE AND AGREE THAT, IN NO EVENT, SHALL MICROCHIP BE* LIABLE, WHETHER IN CONTRACT, WARRANTY, TORT (INCLUDING NEGLIGENCE OR* BREACH OF STATUTORY DUTY), STRICT LIABILITY, INDEMNITY,* CONTRIBUTION, OR OTHERWISE, FOR ANY INDIRECT, SPECIAL, PUNITIVE,* EXEMPLARY, INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, FOR COST OR* EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE CODE, HOWSOEVER* CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE POSSIBILITY OR THE* DAMAGES ARE FORESEEABLE.TO THE FULLEST EXTENT ALLOWABLE BY LAW,* MICROCHIPS TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY RELATED TO THIS* CODE, SHALL NOT EXCEED THE PRICE YOU PAID DIRECTLY TO MICROCHIP* SPECIFICALLY TO HAVE THIS CODE DEVELOPED.* You agree that you are solely responsible for testing the code and* determining its suitability.Microchip has no obligation to modify,* test, certify, or support the code.* REVISION HISTORY:* AuthorDateComments on this revision* Albert Z.03/24/08First release of source file* Albert Z.07/10/08Add RTCC alarm* ADDITIONAL NOTES:* Copy the RTCC functions to your application.* Code Tested on:* Explorer 16 Development Board withPIC24FJ128GA010 controller* DESCRIPTION:* Microchips PIC24F microcontrollers feature a useful Real Time Clock* for users to get an on chip clock in their applications.* This code example demonstrates how to grab and set the RTC, set alarm* and RTCC clock output / alarm output.*/#include / Setup configuration bits/ JTAG/Code Protect/Write Protect/Clip-on Emulation mode/ Watchdog Timer/ICD pins select_CONFIG1(JTAGEN_OFF & GCP_OFF & GWRP_OFF & COE_OFF & FWDTEN_OFF & ICS_PGx2)/ Disable CLK switch and CLK monitor, OSCO or Fosc/2, HS oscillator,/ Primary oscillator_CONFIG2(FCKSM_CSDCMD & OSCIOFNC_OFF & POSCMOD_HS & FNOSC_PRI)/ Union to access rtcc registerstypedef union tagRTCC struct unsigned char sec;unsigned char min;unsigned char hr;unsigned char wkd;unsigned char day;unsigned char mth;unsigned char yr;struct unsigned int prt00;unsigned int prt01;unsigned int prt10;unsigned int prt11; RTCC;RTCC _time;RTCC _time_chk;RTCC _alarm;/ macro#define mRTCCDec2Bin(Dec) (10*(Dec4)+(Dec&0x0f)#define mRTCCBin2Dec(Bin) (Bin/10)= 60)Sec = 0;_time_chk.sec = mRTCCBin2Dec(Sec);* Function: RTCCSetBinMin* Preconditions: None.* Overview: The function verifies a setting minutes range, translates* it into BCD format and writes into _time_chk structure. To write* the structure into clock RTCCSet must be called.* Input: Minutes binary value.* Output: Checked BCD value in _time_chk structure.*/void RTCCSetBinMin(unsigned char Min)if(Min = 60)Min = 0;_time_chk.min = mRTCCBin2Dec(Min);* Function: RTCCSetBinHour* Preconditions: None.* Overview: The function verifies a setting hours range, translates* it into BCD format and writes into _time_chk structure. To write* the structure into clock RTCCSet must be called.* Input: Hours binary value.* Output: Checked BCD value in _time_chk structure.*/void RTCCSetBinHour(unsigned char Hour)if(Hour = 24) Hour = 0;_time_chk.hr = mRTCCBin2Dec(Hour);* Function: RTCCCalculateWeekDay* Preconditions:* Valid values of day, month and year must be presented in* _time_chk structure.* Overview: The function reads day, month and year from _time_chk and* calculates week day. Than It writes result into _time_chk. To write* the structure into clock RTCCSet must be called.* Input: _time_chk with valid values of day, month and year.* Output: Zero based week day in _time_chk structure.*/void RTCCCalculateWeekDay()const char MonthOffset =/jan feb mar apr may jun jul aug sep oct nov dec0,3,3,6,1,4,6,2,5,0,3,5 ;unsigned Year;unsigned Month;unsigned Day;unsigned Offset;/ calculate week dayYear= mRTCCDec2Bin(_time_chk.yr);Month = mRTCCDec2Bin(_time_chk.mth);Day= mRTCCDec2Bin(_time_chk.day);/ 2000s century offset = 6 +/ every year 365%7 = 1 day shift +/ every leap year adds 1 dayOffset = 6 + Year + Year/4;/ Add month offset from tableOffset += MonthOffsetMonth-1;/ Add dayOffset += Day;/ If its a leap year and before March theres no additional day yetif(Year%4) = 0)if(Month Daymax) Day = 1;_time_chk.day = mRTCCBin2Dec(Day);* Function: RTCCSetBinMonth* Preconditions: None.* Overview: The function verifies a setting month range, translates* it into BCD format and writes into _time_chk structure. To write* the structure into clock RTCCSet must be called.* Input: Month binary value.* Output: Checked BCD value in _time_chk structure.*/void RTCCSetBinMonth(unsigned char Month)if(Month 12) Month = 1;_time_chk.mth = mRTCCBin2Dec(Month);* Function: RTCCSetBinYear* Preconditions: None.* Overview: The function verifies a setting year range, translates it* into BCD format and writes into _time_chk structure. To write the* structure into clock RTCCSet must be called.* Input: Year binary value.* Output: Checked BCD value in _time_chk structure.*/void RTCCSetBinYear(unsigned char Year)if(Year = 100)Year = 0;_time_chk.yr = mRTCCBin2Dec(Year);/ Recheck day. Leap year influences to Feb 28/29.RTCCSetBinDay(mRTCCDec2Bin(_time_chk.day);* Interrupt for RTCC Alarm.*/void _attribute_(interrupt, no_auto_psv) _RTCCInterrupt(void)IFS3bits.RTCIF = 0;_builtin_btg(unsigned int *)&LATA, 6);/ Toggle RA6/ TO DO:/ User Implementation.调试RTCC的乐趣(2008-08-06 19:16:31)转载标签：杂谈分类：调试乐趣在调试PIC24FJ的RTCC是，只要报警时间一到，单片机即出现复位或死机的状态，查了很久。因为是调试，是把中断服务程序都关了的，怎么还是会出现呢？实在没有办法了，只好打电话问Microchip公司的工程师了。高工程师说，你确定把中断关了吗，还有RTCC输出引脚也是关了的吗？这种现象是跑飞的现象，问题应该是在中断。再次检查时才发现，我们把中断服务程序关了，但是却忘了把中断使能关掉了。小细节，都没有注意，中断一触发，没有程序要执行，当然要跑飞。* Enable the RTCC interrupt*IFS3bits.RTCIF = 0;/clear the RTCC interrupt flagIEC3bits.RTCIE = 1;/enable the RTCC interrupt* Interrupt for RTCC Alarm.*/void _attribute_(interrupt, no_auto_psv) _RTCCInterrupt(void)IFS3bits.RTCIF = 0;WarnState=WarnState|Battery_Maint;/电池更换告警,需要人为消除该警告标志/Sleep();Idle();/电池确认需要维护了，则不需要再工作了，节电！以待更换电池，应该通过电池的电量来判断。* Function: RTCCALMSet* Preconditions: None.* Overview:* The function upload time and date from _alarm into RTCC alarm.* Input: _alarm - structure containing time and date.* Output: None.*/void RTCCALMSet(void)RTCCUnlock();/ Unlock the RTCCwhile(RCFGCALbits.RTCSYNC=1);/wait for RTCSYNC bit to become 0ALCFGRPTbits.ALRMEN= 0;/disable alarm to update itALCFGRPTbits.ALRMPTR= 2;/Point to Month/Day registerALRMVAL = _alarm.prt10;/load month & dayALRMVAL = _alarm.prt01;/load weekday & hourALRMVAL = _alarm.prt00;/load minute & secondsALCFGRPTbits.AMASK= 9;/alarm every yearALCFGRPTbits.ARPT= 0x01;/alarm 1 times,即重复一次。是执行一次中断吗，ALCFGRPTbits.CHIME= 1;/enable chime,ARPTis allowed to roll over from 00h to FFh.ALCFGRPTbits.ALRMEN= 1;/enable the alarmRCFGCALbits.RTCWREN = 0;/ Lock the RTCC,手动清0应用PIC24自带的USB功能