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Nadeem
science forum beginner
Joined: 08 Jul 2005
Posts: 1
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 Posted: Fri Jul 08, 2005 6:15 pm Post subject:
Hi all I need help with 12c508, i am loosing it
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I have a 12f508 and trying initialize it
every think works except the GP2 pin
i need it to work as an out put. but it just doesnt work . I have
tried everything. I think it is somthing to do with the timer0 but i
dont know what.
anyways this is how i have initialized it.
#include <12c508A.h>
#fuses INTRC,NOWDT,NOPROTECT,NOMCLR
#use delay(clock = 4000000)
#use fast_io(B)
void main()
{
int8 turnoffdelay = shutdwn_delay_min; //shutdown delay variable
int8 MainPower_off;
int1 pinstatus; //stores the GP0 status
int1 toggle;
set_tris_B(0x29);
output_B(0x00);
PLS HElp I WILL REALY APRECIATE IT
Thanks Nadeem |
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Spehro Pefhany
science forum beginner
Joined: 01 May 2005
Posts: 43
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| Posted: Fri Jul 08, 2005 6:43 pm Post subject:
Re: Hi all I need help with 12c508, i am loosing it
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On Fri, 08 Jul 2005 20:15:10 -0000, the renowned
nad@acuraembedded-dot-com.no-spam.invalid (Nadeem) wrote:
| Quote: | I have a 12f508 and trying initialize it
every think works except the GP2 pin
i need it to work as an out put. but it just doesnt work . I have
tried everything. I think it is somthing to do with the timer0 but i
dont know what.
anyways this is how i have initialized it.
#include <12c508A.h
#fuses INTRC,NOWDT,NOPROTECT,NOMCLR
#use delay(clock = 4000000)
#use fast_io(B)
void main()
{
int8 turnoffdelay = shutdwn_delay_min; //shutdown delay variable
int8 MainPower_off;
int1 pinstatus; //stores the GP0 status
int1 toggle;
set_tris_B(0x29);
output_B(0x00);
PLS HElp I WILL REALY APRECIATE IT
Thanks Nadeem
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This is not the correct newsgroup.
But anyway, you will need to set the OPTION register. See the
datasheet.
Also note that the 12C508 is not the same as the 12F508 in every
respect (you refer to both).
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com |
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Scott Seidman
science forum addict
Joined: 05 May 2005
Posts: 62
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| Posted: Fri Jul 08, 2005 6:52 pm Post subject:
Re: Hi all I need help with 12c508, i am loosing it
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nad@acuraembedded-dot-com.no-spam.invalid (Nadeem) wrote in
news:11ctnmecttfe318@corp.supernews.com:
| Quote: | I have a 12f508 and trying initialize it
every think works except the GP2 pin
i need it to work as an out put. but it just doesnt work . I have
tried everything. I think it is somthing to do with the timer0 but i
dont know what.
anyways this is how i have initialized it.
#include <12c508A.h
#fuses INTRC,NOWDT,NOPROTECT,NOMCLR
#use delay(clock = 4000000)
#use fast_io(B)
void main()
{
int8 turnoffdelay = shutdwn_delay_min; //shutdown delay variable
int8 MainPower_off;
int1 pinstatus; //stores the GP0 status
int1 toggle;
set_tris_B(0x29);
output_B(0x00);
PLS HElp I WILL REALY APRECIATE IT
Thanks Nadeem
|
Your main needs to end with an infinite loop
Scott |
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Mark
science forum addict
Joined: 02 May 2005
Posts: 51
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| Posted: Fri Jul 08, 2005 10:13 pm Post subject:
Re: Hi all I need help with 12c508, i am loosing it
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"Nadeem" <nad@acuraembedded-dot-com.no-spam.invalid> wrote in message
news:11ctnmecttfe318@corp.supernews.com...
| Quote: | I have a 12f508 and trying initialize it
every think works except the GP2 pin
i need it to work as an out put. but it just doesnt work . I have
tried everything. I think it is somthing to do with the timer0 but i
dont know what.
anyways this is how i have initialized it.
#include <12c508A.h
#fuses INTRC,NOWDT,NOPROTECT,NOMCLR
#use delay(clock = 4000000)
#use fast_io(B)
void main()
{
int8 turnoffdelay = shutdwn_delay_min; //shutdown delay variable
int8 MainPower_off;
int1 pinstatus; //stores the GP0 status
int1 toggle;
set_tris_B(0x29);
output_B(0x00);
PLS HElp I WILL REALY APRECIATE IT
Thanks Nadeem
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I don't see anything in your code that sets the option register. As I
recall, it defaults to use GP2 as a clock source on reset. This would make
it an input pin and disregard the TRIS bits.
Mark Walsh |
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