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RTC in LPC2106

Started by acetoel ●January 6, 2005

Hello, I have set up the RTC and make a simple program to test it. But
it doesn't work! Here is the code... on the PC (connected to the
serial port) I always view the same time 19:8:51
Thanks
Ezequiel

#include "LPC210x.h"
#include "Init.h"
#include "UART.h"
#include "Delayus.h"

#define Boton 0x80000000
#define LED1 0x10000000
#define LED2 0x20000000
#define LED3 0x40000000

UInt8 contador;
UInt16 Counter2;
UInt32 Hour,Min,Sec; int main (void)
{
/*Initialize the system*/
InitLPC2106();
InitCom(); //115200 bauds
IODIR=0x70000000;
IOCLR=0x70000000;

RTC_CCR=0;
RTC_CIIR=0x00000000;
RTC_AMR=0x00000000;
//real date time setting
RTC_SEC=0x00000033;
RTC_MIN=0x00000008;
RTC_HOUR=0x00000013;
RTC_DOM=0x00000006;
RTC_DOW=0x00000004;
RTC_DOY=0x00000004;
RTC_MONTH=0x00000001;
RTC_YEAR=0x000007D5;
//alarm setting
RTC_ALSEC=0x00000001;
RTC_ALMIN=0x00000001;
RTC_ALHOUR=0x00000001;
RTC_ALDOM=0x00000001;
RTC_ALDOW=0x00000001;
RTC_ALDOY=0x00000001;
RTC_ALMON=0x00000001;
RTC_ALYEAR=0x000007D0;
//start rtc
RTC_CCR=0x00000001;

contador=0x00;
IOSET = LED2;
IOSET = LED3;
printf ("Ezequiel L. Acetp %c%c",'\n','\r');
//printf("Ezequiel L. Aceto\n");
//printf("Sunixs Microsystems\n");
while(1)
{
IOSET = LED1;
delayus(1000); //0.5 Sec delay
IOCLR = LED1;
delayus(1000);
Hour = RTC_HOUR;
Min = RTC_MIN;
Sec = RTC_SEC;
printf("%2d : %2d : %2d ",Hour, Min, Sec,'\n','\r');
Hour = 0x00;
Min = 0x00;
Sec = 0x00;
}
}


An Engineer's Guide to the LPC2100 Series

Reply by lpc_bavaria ●January 7, 20052005-01-07

Hi Ezequiel,

have you set the prescaler registers RTC_PREINT and RTC_PREFRAC to
divide down your pclk to 32.768 kHz?

Cheers,
Rolf --- In , "acetoel" <acetoel@y...> wrote:
>
> Hello, I have set up the RTC and make a simple program to test it. But
> it doesn't work! Here is the code... on the PC (connected to the
> serial port) I always view the same time 19:8:51
> Thanks
> Ezequiel
>
> #include "LPC210x.h"
> #include "Init.h"
> #include "UART.h"
> #include "Delayus.h"
>
> #define Boton 0x80000000
> #define LED1 0x10000000
> #define LED2 0x20000000
> #define LED3 0x40000000
>
> UInt8 contador;
> UInt16 Counter2;
> UInt32 Hour,Min,Sec; > int main (void)
> {
> /*Initialize the system*/
> InitLPC2106();
> InitCom(); //115200 bauds
> IODIR=0x70000000;
> IOCLR=0x70000000;
>
> RTC_CCR=0;
> RTC_CIIR=0x00000000;
> RTC_AMR=0x00000000;
> //real date time setting
> RTC_SEC=0x00000033;
> RTC_MIN=0x00000008;
> RTC_HOUR=0x00000013;
> RTC_DOM=0x00000006;
> RTC_DOW=0x00000004;
> RTC_DOY=0x00000004;
> RTC_MONTH=0x00000001;
> RTC_YEAR=0x000007D5;
> //alarm setting
> RTC_ALSEC=0x00000001;
> RTC_ALMIN=0x00000001;
> RTC_ALHOUR=0x00000001;
> RTC_ALDOM=0x00000001;
> RTC_ALDOW=0x00000001;
> RTC_ALDOY=0x00000001;
> RTC_ALMON=0x00000001;
> RTC_ALYEAR=0x000007D0;
> //start rtc
> RTC_CCR=0x00000001;
>
> contador=0x00;
> IOSET = LED2;
> IOSET = LED3;
> printf ("Ezequiel L. Acetp %c%c",'\n','\r');
> //printf("Ezequiel L. Aceto\n");
> //printf("Sunixs Microsystems\n");
> while(1)
> {
> IOSET = LED1;
> delayus(1000); //0.5 Sec delay
> IOCLR = LED1;
> delayus(1000);
> Hour = RTC_HOUR;
> Min = RTC_MIN;
> Sec = RTC_SEC;
> printf("%2d : %2d : %2d ",Hour, Min, Sec,'\n','\r');
> Hour = 0x00;
> Min = 0x00;
> Sec = 0x00;
> }
> }



Reply by acetoel ●January 8, 20052005-01-08

Ups... I didn't do that... how can I set it up, if I have a PCLK and
CCLK of 60Mhz?
Thanks
Ezequiel

--- In , "lpc_bavaria" <lpc_bavaria@y...> wrote:
>
> Hi Ezequiel,
>
> have you set the prescaler registers RTC_PREINT and RTC_PREFRAC to
> divide down your pclk to 32.768 kHz?
>
> Cheers,
> Rolf > --- In , "acetoel" <acetoel@y...> wrote:
> >
> > Hello, I have set up the RTC and make a simple program to test it. But
> > it doesn't work! Here is the code... on the PC (connected to the
> > serial port) I always view the same time 19:8:51
> > Thanks
> > Ezequiel
> >
> > #include "LPC210x.h"
> > #include "Init.h"
> > #include "UART.h"
> > #include "Delayus.h"
> >
> > #define Boton 0x80000000
> > #define LED1 0x10000000
> > #define LED2 0x20000000
> > #define LED3 0x40000000
> >
> > UInt8 contador;
> > UInt16 Counter2;
> > UInt32 Hour,Min,Sec;
> >
> >
> > int main (void)
> > {
> > /*Initialize the system*/
> > InitLPC2106();
> > InitCom(); //115200 bauds
> > IODIR=0x70000000;
> > IOCLR=0x70000000;
> >
> > RTC_CCR=0;
> > RTC_CIIR=0x00000000;
> > RTC_AMR=0x00000000;
> > //real date time setting
> > RTC_SEC=0x00000033;
> > RTC_MIN=0x00000008;
> > RTC_HOUR=0x00000013;
> > RTC_DOM=0x00000006;
> > RTC_DOW=0x00000004;
> > RTC_DOY=0x00000004;
> > RTC_MONTH=0x00000001;
> > RTC_YEAR=0x000007D5;
> > //alarm setting
> > RTC_ALSEC=0x00000001;
> > RTC_ALMIN=0x00000001;
> > RTC_ALHOUR=0x00000001;
> > RTC_ALDOM=0x00000001;
> > RTC_ALDOW=0x00000001;
> > RTC_ALDOY=0x00000001;
> > RTC_ALMON=0x00000001;
> > RTC_ALYEAR=0x000007D0;
> > //start rtc
> > RTC_CCR=0x00000001;
> >
> > contador=0x00;
> > IOSET = LED2;
> > IOSET = LED3;
> > printf ("Ezequiel L. Acetp %c%c",'\n','\r');
> > //printf("Ezequiel L. Aceto\n");
> > //printf("Sunixs Microsystems\n");
> > while(1)
> > {
> > IOSET = LED1;
> > delayus(1000); //0.5 Sec delay
> > IOCLR = LED1;
> > delayus(1000);
> > Hour = RTC_HOUR;
> > Min = RTC_MIN;
> > Sec = RTC_SEC;
> > printf("%2d : %2d : %2d ",Hour, Min, Sec,'\n','\r');
> > Hour = 0x00;
> > Min = 0x00;
> > Sec = 0x00;
> > }
> > }



Reply by Rolf Meeser ●January 9, 20052005-01-09
Hi Ezequiel,

you find the formulas in the User Manual (Chapter 15,
Reference clock divider).

For a 60 MHz PCLK you obtain:

RTC_PREINT = int( 60e6/32768 ) - 1 = 1830
RTC_PREFRAC = 60e6 - ((1830 + 1) * 32768) = 1792

For the widely used 14.7456 MHz crystal, where you can
set CCLK and PCLK to 58.9824 MHz, you obtain
RTC_PREINT99, RTC_PREFRAC=0

Cheers,
Rolf --- acetoel <> wrote:

>
> Ups... I didn't do that... how can I set it up, if I
> have a PCLK and
> CCLK of 60Mhz?
> Thanks
> Ezequiel
>
> --- In , "lpc_bavaria"
> <lpc_bavaria@y...> wrote:
> >
> > Hi Ezequiel,
> >
> > have you set the prescaler registers RTC_PREINT
> and RTC_PREFRAC to
> > divide down your pclk to 32.768 kHz?
> >
> > Cheers,
> > Rolf
> >
> >
> > --- In , "acetoel"
> <acetoel@y...> wrote:
> > >
> > > Hello, I have set up the RTC and make a simple
> program to test it. But
> > > it doesn't work! Here is the code... on the PC
> (connected to the
> > > serial port) I always view the same time 19:8:51
> > > Thanks
> > > Ezequiel
> > >
> > > #include "LPC210x.h"
> > > #include "Init.h"
> > > #include "UART.h"
> > > #include "Delayus.h"
> > >
> > > #define Boton 0x80000000
> > > #define LED1 0x10000000
> > > #define LED2 0x20000000
> > > #define LED3 0x40000000
> > >
> > > UInt8 contador;
> > > UInt16 Counter2;
> > > UInt32 Hour,Min,Sec;
> > >
> > >
> > > int main (void)
> > > {
> > > /*Initialize the system*/
> > > InitLPC2106();
> > > InitCom(); //115200 bauds
> > > IODIR=0x70000000;
> > > IOCLR=0x70000000;
> > >
> > > RTC_CCR=0;
> > > RTC_CIIR=0x00000000;
> > > RTC_AMR=0x00000000;
> > > //real date time setting
> > > RTC_SEC=0x00000033;
> > > RTC_MIN=0x00000008;
> > > RTC_HOUR=0x00000013;
> > > RTC_DOM=0x00000006;
> > > RTC_DOW=0x00000004;
> > > RTC_DOY=0x00000004;
> > > RTC_MONTH=0x00000001;
> > > RTC_YEAR=0x000007D5;
> > > //alarm setting
> > > RTC_ALSEC=0x00000001;
> > > RTC_ALMIN=0x00000001;
> > > RTC_ALHOUR=0x00000001;
> > > RTC_ALDOM=0x00000001;
> > > RTC_ALDOW=0x00000001;
> > > RTC_ALDOY=0x00000001;
> > > RTC_ALMON=0x00000001;
> > > RTC_ALYEAR=0x000007D0;
> > > //start rtc
> > > RTC_CCR=0x00000001;
> > >
> > > contador=0x00;
> > > IOSET = LED2;
> > > IOSET = LED3;
> > > printf ("Ezequiel L. Acetp %c%c",'\n','\r');
> > > //printf("Ezequiel L. Aceto\n");
> > > //printf("Sunixs Microsystems\n");
> > > while(1)
> > > {
> > > IOSET = LED1;
> > > delayus(1000); //0.5 Sec delay
> > > IOCLR = LED1;
> > > delayus(1000);
> > > Hour = RTC_HOUR;
> > > Min = RTC_MIN;
> > > Sec = RTC_SEC;
> > > printf("%2d : %2d : %2d ",Hour, Min,
> Sec,'\n','\r');
> > > Hour = 0x00;
> > > Min = 0x00;
> > > Sec = 0x00;
> > > }
> > > } >
>


__________________________________________________
Reply by Richard ●January 10, 20052005-01-10
This looks like the code from our Beta compiler's AppBuilder? If so, the
next release has that fixed...

>--- acetoel <> wrote:
>
> >
> > Ups... I didn't do that... how can I set it up, if I
> > have a PCLK and
> > CCLK of 60Mhz?
> > Thanks
> > Ezequiel
>
// richard (This email is for mailing lists. To reach me directly, please
use richard at imagecraft.com)


Reply by acetoel ●January 11, 20052005-01-11

In fact, I'm testing some of my GCC code with the beta of Imagecraft.
And also using the AppBuilder. This is the first bug I found in ICC
ARM. The AppBuilder doesn't set the RTC Clock.
See you
Ezequiel

--- In , Richard <richard-lists@i...> wrote:
> This looks like the code from our Beta compiler's AppBuilder? If so,
the
> next release has that fixed...
>
> >--- acetoel <acetoel@y...> wrote:
> >
> > >
> > > Ups... I didn't do that... how can I set it up, if I
> > > have a PCLK and
> > > CCLK of 60Mhz?
> > > Thanks
> > > Ezequiel
> > >
> >
> >
>
> // richard (This email is for mailing lists. To reach me directly,
please
> use richard at imagecraft.com)