I'm trying to get the timer overflow interrupt working on the hc12 dp256b
but so far I haven't had any luck.
The overflow interrupt is never generated in my program(used a breakpiont
in isr) and I can't find the logic error in my code.
Here is my work environment:
CHIP: hc12dp256
COMPILER: ICC12
DEBUGGER: NOICE
Here's the code that doesn't work
------------------------------------------------------------------------------
#include <hcs12dp256.h>
#include <stdio.h>
#pragma interrup_handler TOVF_ISR() (isrs installed in vector table file)
int count
void main(void)
{
//setup
TFLG2|=0x80; //Clear interrupt flag
TSCR2 =0x8D; //Set timer frequency(250kHz), Enable TOVF int
TSCR1|=0x90; //enable timer and fast clear TOC7
asm("cli");
count=0;
while(count<3){
if(i%2000==0) printf("count: %d\n",count);
i++;
}
printf("count reached three\n");
}
void TOVF_ISR()
{
asm("cli"); //reenable interrupts
count++;
TFLG2|=0X80;
}
----------------------------------------------------------------------------
Thanks to anyone who can help me out
68hc12 TOVF interrupt problems ICC12
Started by ●March 25, 2009
Reply by ●March 25, 20092009-03-25
"Marcipicus" wrote:>I'm trying to get the timer overflow interrupt working on the hc12 dp256b >but so far I haven't had any luck. > >The overflow interrupt is never generated in my program(used a breakpiont >in isr) and I can't find the logic error in my code. > >Here is my work environment: >CHIP: hc12dp256 >COMPILER: ICC12 >DEBUGGER: NOICE > >Here's the code that doesn't work > >------------------------------------------------------------------------------ >#include <hcs12dp256.h> >#include <stdio.h> > >#pragma interrup_handler TOVF_ISR() (isrs installed in vector table file) > >int count > >void main(void) >{ > //setup > TFLG2|=0x80; //Clear interrupt flag > TSCR2 =0x8D; //Set timer frequency(250kHz), Enable TOVF intwhy do you set TCRE?> TSCR1|=0x90; //enable timer and fast clear TOC7 > > asm("cli"); > > count=0; > while(count<3){ > if(i%2000==0) printf("count: %d\n",count); > i++; > } > > printf("count reached three\n"); >}not what you asked, but what happens when main() returns?>void TOVF_ISR() >{ > asm("cli"); //reenable interruptswhy? RTI will do so, and your ISR doesn't run very long.> count++; > TFLG2|=0X80; >}Oliver -- Oliver Betz, Munich despammed.com might be broken, use Reply-To:
Reply by ●March 25, 20092009-03-25
This is a multi-part message in MIME format. ------=_NextPart_000_0195_01C9ADFE.4134FD60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable "Marcipicus" <msammon@connect.carleton.ca> wrote in message = news:ffWdnayE0-NRq1fUnZ2dnUVZ_gOWnZ2d@giganews.com...> I'm trying to get the timer overflow interrupt working on the hc12 =dp256b> but so far I haven't had any luck. >=20 > The overflow interrupt is never generated in my program(used a =breakpiont> in isr) and I can't find the logic error in my code. >=20 > Here is my work environment: > CHIP: hc12dp256 > COMPILER: ICC12 > DEBUGGER: NOICE >=20 > Here's the code that doesn't work >=20 > =-------------------------------------------------------------------------= -----> #include <hcs12dp256.h> > #include <stdio.h> >=20 > #pragma interrup_handler TOVF_ISR() (isrs installed in vector table =file)>=20 > int count >=20 > void main(void) > { > //setup > TFLG2|=3D0x80; //Clear interrupt flagYou should only clear the flag by TFLG2 =3D 0x80 else you will clear any = other unserviced flags as well.=20> TSCR2 =3D0x8D; //Set timer frequency(250kHz), Enable TOVF int > TSCR1|=3D0x90; //enable timer and fast clear TOC7 >=20 > asm("cli"); >=20 > count=3D0; > while(count<3){ > if(i%2000=3D=3D0) printf("count: %d\n",count); > i++; > } >=20 > printf("count reached three\n");Your returning from Main!!!!!!!!!!> } >=20 > void TOVF_ISR() > { > asm("cli"); //reenable interruptsThis is not needed, RTI will restore it> count++; > TFLG2|=3D0X80;Same as mentioned above, clear by TFLG2 =3D 0x80. However, you have = setup to auto clear (TSCR1 |=3D 0x90) which simply requires an access to = the TCNT registers to auto clear.> } > =-------------------------------------------------------------------------= --->=20 > Thanks to anyone who can help me out >=20 >------=_NextPart_000_0195_01C9ADFE.4134FD60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.6000.16809" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>"Marcipicus" <</FONT><A=20 href=3D"mailto:msammon@connect.carleton.ca"><FONT face=3DArial=20 size=3D2>msammon@connect.carleton.ca</FONT></A><FONT face=3DArial = size=3D2>> wrote=20 in message </FONT><A=20 href=3D"news:ffWdnayE0-NRq1fUnZ2dnUVZ_gOWnZ2d@giganews.com"><FONT = face=3DArial=20 size=3D2>news:ffWdnayE0-NRq1fUnZ2dnUVZ_gOWnZ2d@giganews.com</FONT></A><FO= NT=20 face=3DArial size=3D2>...</FONT></DIV> <DIV><FONT face=3DArial size=3D2>> I'm trying to get the timer = overflow interrupt=20 working on the hc12 dp256b<BR>> but so far I haven't had any = luck.<BR>>=20 <BR>> The overflow interrupt is never generated in my program(used a=20 breakpiont<BR>> in isr) and I can't find the logic error in my = code.<BR>>=20 <BR>> Here is my work environment:<BR>> = CHIP: =20 hc12dp256<BR>> COMPILER: ICC12<BR>> DEBUGGER: NOICE<BR>> = <BR>>=20 Here's the code that doesn't work<BR>> <BR>>=20 -------------------------------------------------------------------------= -----<BR>>=20 #include <hcs12dp256.h><BR>> #include <stdio.h><BR>> = <BR>>=20 #pragma interrup_handler TOVF_ISR() (isrs installed in vector table=20 file)<BR>> <BR>> int count<BR>> <BR>> void = main(void)<BR>>=20 {<BR>> //setup<BR>> =20 TFLG2|=3D0x80; //Clear interrupt=20 flag</FONT></DIV> <DIV><FONT face=3DArial color=3D#ff0000 size=3D2></FONT> </DIV> <DIV><FONT face=3DArial color=3D#ff0000 size=3D2>You should only clear = the=20 flag by TFLG2 =3D 0x80 else you will clear any other unserviced = flags as=20 well. </FONT></DIV> <DIV><BR><FONT face=3DArial size=3D2>> TSCR2=20 =3D0x8D; //Set timer = frequency(250kHz), Enable=20 TOVF int<BR>> = TSCR1|=3D0x90; //enable=20 timer and fast clear TOC7<BR>> <BR>> =20 asm("cli");<BR>> <BR>> count=3D0;<BR>> =20 while(count<3){<BR>> if(i%2000=3D=3D0) = printf("count:=20 %d\n",count);<BR>> i++;<BR>> }<BR>>=20 <BR>> printf("count reached three\n");</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2><FONT color=3D#ff0000>Your returning = from=20 Main!!!!!!!!!!</FONT></DIV> <DIV><BR>> }<BR>> <BR>> void TOVF_ISR()<BR>> {<BR>> = asm("cli"); //reenable interrupts</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2><FONT color=3D#ff0000>This is not = needed, RTI will=20 restore it</FONT></DIV> <DIV><BR>> count++;<BR>> TFLG2|=3D0X80;</DIV> <DIV> </DIV> <DIV><FONT color=3D#ff0000>Same as mentioned above, clear by TFLG2 =3D = 0x80.=20 However, you have setup to auto clear (TSCR1 |=3D 0x90) which simply = requires an=20 access to the TCNT registers to auto clear.</FONT></DIV> <DIV><FONT color=3D#ff0000></FONT><BR>> }<BR>>=20 -------------------------------------------------------------------------= ---<BR>>=20 <BR>> Thanks to anyone who can help me out<BR>>=20 <BR>></FONT></DIV></BODY></HTML> ------=_NextPart_000_0195_01C9ADFE.4134FD60--
Reply by ●March 25, 20092009-03-25
PhilW wrote:> > Part 1.1 Type: Plain Text (text/plain) > Encoding: quoted-printablePlease do not use html in Usenet. This is a pure text medium. -- [mail]: Chuck F (cbfalconer at maineline dot net) [page]: <http://cbfalconer.home.att.net> Try the download section.
