24FJ64GA002和RTC不工作

这里是一个设置内部RTC的函数，以及一个使用内部结构来读取内部RTC的函数。



      以下为原文

    Here is a function to set the internal rtc.
.include "xc.inc"
.include "UtilityLib2.inc"
.global _setinternalclock
.section utilitycode,code
;----------------------------------------------------
.equ DT,    w0    ;DateTime_t *
.equ tmp,  w2

_setinternalclock:  ;void setinternalclock(DateTime_t *DT);  bcd
    mov     #0x55,tmp
    mov     tmp,NVMKEY
    mov     #0xAA,tmp
    mov     tmp,NVMKEY
    bset    RCFGCAL,#RTCWREN        ;Set RTCWREN bit
    bclr    RCFGCAL,#RTCEN
    mov     RCFGCAL,tmp
    ior     #0x300,tmp            ;all
    mov     tmp,RCFGCAL
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ;set date
    mov     [DT+DT_Year],tmp        ;get year
    mov     tmp,RTCVAL            ;set year
    mov     [DT+DT_DateMonth],tmp    ;get date/month
    mov     tmp,RTCVAL            ;set month/date
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ;set time
    mov     [DT+DT_HourDay],tmp        ;get hour/day
    mov     tmp,RTCVAL            ;set hour/day
    mov     [DT+DT_SecondMinute],tmp    ;get sec/min
    mov     tmp,RTCVAL            ;set min/sec
    bset    RCFGCAL,#RTCEN
    bclr    RCFGCAL,#RTCWREN        ;Set RTCWREN bit
    return
;----------------------------------------------------
.end
And a function to read the internal rtc.
.include "xc.inc"
.include "UtilityLib2.inc"
.global _getinternalclock
.section utilitycode,code
;----------------------------------------------------
.equ DT,    w0  ;DateTime_t *
.equ tmp,  w2
_getinternalclock:  ;void  getinternalclock(DateTime_t *DT);
sync:
    btst    RCFGCAL,#RTCSYNC
    bra     nz,sync
    mov     RCFGCAL,tmp
    ior     #0x300,tmp            ;all
    mov     tmp,RCFGCAL
    mov     RTCVAL,tmp            ;get year
    mov     #0x2000,w1            ;set 20yy
    ior     w1,tmp,tmp
    mov     tmp,[DT+DT_Year]        ;store yyyy
    mov     RTCVAL,tmp            ;get date/month
    mov     tmp,[DT+DT_DateMonth]
    mov     RTCVAL,tmp            ;get weekday/hour
    mov     tmp,[DT+DT_HourDay]
    mov     RTCVAL,tmp            ;get min/sec
    mov     tmp,[DT+DT_SecondMinute]
    return
;----------------------------------------------------
.end
Using this timedate structure.
//----------------------------------------------------
typedef struct{
    union{
        struct{
            unsigned char   Second;
            unsigned char   Minute;
        };
        unsigned int    SecondMinute;
    };
    union{
        struct{
            unsigned char   Hour;
            unsigned char   Day;
        };
        unsigned int    HourDay;
    };
    union{
        struct{
            union{
                struct{
                    unsigned char   Date;
                    unsigned char   Month;
                };
                unsigned int    DateMonth;
            };
            unsigned int    Year;
        };
        unsigned long   TotalSeconds;
    };
}DateTime_t;
//----------------------------------------------------

在您的代码中，您应该在修改W8之前修改W8，而不是W0-W7。这是我使用外部RTC之后不再使用的旧代码。



      以下为原文

    In your code, you should push w8 before modifying it but not w0 - w7.
 
That was old code that I no longer use since I use external rtc's.

谢谢。我会在华氏一分钟测试它。是的，就像我说的，我可以在IIC或SPI上运行一个大约3分钟，但我正在尝试一个芯片解决方案运行，这是我的命。不应该这么难…



      以下为原文

    Thanks for that. I'll test it here in hust a minute.
 

 
 Yeah, like I said, I can have one on IIC or SPI running in about 3 minutes, but I'm trying to get a single chip solution running and this is killing me. Shouldn't be this hard...

谢谢。我会在华氏一分钟测试它。是的，就像我说的，我可以在IIC或SPI上运行一个大约3分钟，但我正在尝试一个芯片解决方案运行，这是我的命。不应该这么难…



      以下为原文

    Thanks for that. I'll test it here in hust a minute.
 

 
 Yeah, like I said, I can have one on IIC or SPI running in about 3 minutes, but I'm trying to get a single chip solution running and this is killing me. Shouldn't be this hard...

嗯，仔细看你的代码后，恐怕我不明白如何实现它。我理解这个结构，知道该怎么做，但剩下的不是我能理解的。这2个函数是以某种内嵌的ASM代码结构或什么东西来延续的吗？我对此有点迷茫。



      以下为原文

    Well, after looking closer at your code, I'm afraid I don't understand how to implement it. I understand the timedate structure and know what to do with that, but the rest is not something I understand. Are the 2 functons contined in some sort of inline asm code structure or something? I'm a bit lost on that.

这是我的一个PIC24FV32 KA302的RTCC代码，



      以下为原文

    This was my RTCC code for a PIC24FV32KA302, 

void RTCC_init() {
RTCCunlock();
// write default RTCC yyyy mmdd wdhh mmss
RTCPWCbits.RTCCLK = 0; // external OSC
RTCPWCbits.RTCOUT = 01; // 01 rtcc out = seconds
RCFGCALbits.RTCPTR = 3; //**** pointer auto incremnent with data
RTCVAL = 0x2017; // year 2013 val 3
RTCVAL = 0x0101; // month / day val 2
RTCVAL = 0x0112; // weekday / hour val 1
RTCVAL = 0x0055; // mins / sec val 55
ALCFGRPTbits.ARPT = 2;
ALRMVAL = 0x0101; // month / day val 2
ALRMVAL = 0x0108; // weekday / hour val 1
ALRMVAL = 0x0000; // mins / 10SECS
ALCFGRPTbits.AMASK = 3; // 5=hour 3 = each minute 2 = 10 sec
ALCFGRPTbits.ARPT = 0; //
ALCFGRPTbits.CHIME = 1; // repeat forever
ALCFGRPTbits.ALRMEN = 1; // ENABLE
RCFGCALbits.CAL = 0xF0; // Neg adjust OSC
RCFGCALbits.RTCEN = 1; // enable RTCC
RCFGCALbits.RTCOE = 1; // RTCC output enable
RCFGCALbits.RTCWREN = 0; // lock the RTCC
__delay_ms(50);
}
void RTCCunlock() {
asm("push w7");
asm("push w8");
asm("disi #5");
asm("mov #0x55, w7");
asm("mov w7, _NVMKEY");
asm("mov #0xAA, w8");
asm("mov w8, _NVMKEY");
asm("bset _RCFGCAL, #13"); //set the RTCWREN bit
asm("pop w8");
asm("pop w7");
}
void RTC_update() {
unsigned int mmss = 0;
RTCCunlock();
ALCFGRPTbits.ALRMEN = 0; // disable allarm
RCFGCALbits.RTCPTR = 3; //**** pointer auto incremnent with data
RTCVAL = year; // year 2017 val 3
RTCVAL = mmdd; // month / day val 2
RTCVAL = Time_day_hr; // weekday / hour val 1
mmss = Time_min_sec;
mmss = mmss << 8;
mmss = (mmss | Rec_sec); // second ?
RTCVAL = mmss; // ; // mins / sec
ALCFGRPTbits.ALRMEN = 1; // d
RCFGCALbits.RTCWREN = 0; // lock the RTCC
}
void RTC_write_Time() {
unsigned int mmss = 0;
RTCCunlock();
ALCFGRPTbits.ALRMEN = 0; // disable allarm
RCFGCALbits.RTCPTR = 1; //**** pointer auto incremnent with data
RTCVAL = Time_day_hr; // weekday / hour val 1
mmss = Time_min_sec;
mmss = mmss << 8;
mmss = (mmss | Rec_sec); // second ?
RTCVAL = mmss; // ; // mins / sec
ALCFGRPTbits.ALRMEN = 1; // d
RCFGCALbits.RTCWREN = 0; // lock the RTCC
}
void get_time() {
RCFGCALbits.RTCPTR = 3; //**** pointer auto decremnent with data
year = RTCVAL;
mmdd = RTCVAL;
mhrs = (RTCVAL & 0x00FF); // weekday / hour val 1
mmss = RTCVAL;
msec = mmss & 0x00FF;
mmin = mmss >> 8; // mins / sec val 0
myy = (year & 0x00FF); // year
mdd = mmdd & 0x00FF;
mmm = mmdd >> 8; 
}
 

不内联，只需使用汇编程序。可以在两个ASM文件或1个单个文件中。复制并粘贴到一个新的ASM文件中，删除。包括“UTITYLYB2.Inc”，使用原型从C.使用。



      以下为原文

    Not inline, just using the assembler.
 
Can be in two asm files or 1 single file.
 
Copy and paste into a new asm file, remove the .include "UtilityLib2.inc"
Use the prototypes to use from C.

在PIC24FJ64 GA22中使用RTCC是非常困难的。第二个振荡器必须明确地启用，参见这里。RTCC被供电的方式几乎不可能在主VDD未被供电时具有有效的电池备份。或任何需要实时时钟日历功能的项目。



      以下为原文

    Using the RTCC in the PIC24FJ64GA002 is very hard to get right.

The Secondary Oscillator must be explicitly enabled, see here.

Also the way the RTCC gets powered it is all but impossible to have an effective battery backup when the main VDD is not powered.

Today the PIC24FJ64GA002 is a rotten choice for any project that needs a Real-Time-Clock-Calender feature.

我使用的是MDSIM集成DS323，它只需要一个电池组。



      以下为原文

    I use the Maxim Integrated DS3231.
It only needs a cell battery.
 

好啊。我设法使RTC运行。对不起，我没有使用上面提供的任何代码。我运行MCC，并能使它运行起来。现在我还有另外一个问题，或者是一个问题。时钟正在运行…真慢。我有一个32768晶体与15PF上限地面上的SOSC引脚。我已经在一些专用的RTC芯片上使用了这个EXACT晶体，没有问题-DT是按MS每天的顺序或类似的（我忘了它是什么，但它确实很紧）。这对RTC来说真的很糟糕。这意味着手术1年后，我将失去大约42天。不好的。所以，当我在MCC中设置这个东西时，我指定了时钟速度（再次，327 68赫兹）。是不是我做了什么错事，或者我应该做些什么来从中得到更好的时间？我想我会放弃机上的RTC，并坚持专用芯片，因为这是很难设置，显然缺乏严格的公差，真正的RTC应该有。对此有什么想法？



      以下为原文

    Ok. I have managed to get the rtc running. Sorry, but I didn't use any of the code provided above. I ran MCC and canabilzed what I needed to get it to run. Now I have another question - or maybe a concern.
 
The clock is running .... really slow. I have a 32768 crystal with 15pf caps to ground on the sosc pins. I have used this exaact same crystal on some dedicated rtc chips with no problem - dT was on the order of mS per day or something like that (Iforget exactly what it was, but it was really tight).
 
With the pic24 and this crystal, my rtc pin is flashing with a period of 0.5137S and and on time of 257mS. This is really bad for an RTC. that means that after 1 year of operation I will have lost about 42 days. Not good. So, when I set the thing up in MCC I specified the clock speed (again, 32768Hz). Is there something I have done wrong or something else I should have done to get a better time out of this?
 
I imagine I will just abandon the onboard rtc and stick with the dedicated chips as this is so difficult to set up and apparently lacks the tight tolerances that a real RTC should have.
 
Any thoughts on this?

我放弃了内部RTC由于ACTRESION。我有一个面包板与DS323 1，我还没有检查6个月。它是大约5秒，我可能没有同步的时钟时，它是最后一套。我用的PC时钟，我应该使用原子钟。DS331不使用外部XTAL。



      以下为原文

    I gave up on the internal rtc due to accurracy.
 
I had a breadboard with a DS3231 that I had not checked for 6 months.
It was about 5 seconds out and I may not have synced' the clock when it was last set.
 
I used the pc clock, I should have used an atomic clock.
 
The DS2331 does not use an external xtal.

Gort，我想你是说DS323？内部振荡器我可以挑一些。



      以下为原文

    Gort, I assume you mean DS3231? Internal oscillator. I may pick up some of those.

是的，只需要一个备用电池，还有一个温度传感器。



      以下为原文

    Yeah, just need a backup cell battery.
Also has a temperature sensor.

刚从易趣网公司买了3台。我猜我正在丢弃车载RTC。羞耻。我真的希望微芯片有更好的公差。



      以下为原文

    just bought 3 off ebay. guess I'm ditching the onboard rtc. shame. I really expected better tolerances from microchip.