Post by thread:In C, how do you set a pin to high voltage?

compiler? In C18, it's PORTAbits.RA0=1; On Fri, May 28, 2010 at 6:31 PM, Xiao Xu <spam_OUTxiaoxu193TakeThisOuTgmail.com> wrote: > To set, for example RA0, to high in C, can you just do PORTA0=1? > - Xiao Xu > -

Try it in your particular C. See if it works or gives an error. Search Help? Look with Sim to see what works? On 5/28/2010 2:31 PM, Xiao Xu wrote: > To set, for example RA0, to high in C, can you just do PORTA0=1? > - Xiao Xu >

I'm using the HI-TECH C Compiler LIte - Xiao Xu On Fri, May 28, 2010 at 5:53 PM, Bruno L. Albrecht <.....brunolalbKILLspam@spam@gmail.com> wrote: > compiler? > In C18, it's PORTAbits.RA0=1; > > On Fri, May 28, 2010 at 6:31 PM, Xiao Xu <xiaoxu193KILLspamgmail.com> wrote: > >> To set, for example RA0, to high in C, can you just do PORTA0=1? >> - Xiao Xu >> --

I'm not sure, but perhaps PORTA.RA0=1; may work...try that On Fri, May 28, 2010 at 7:13 PM, Xiao Xu <.....xiaoxu193KILLspam.....gmail.com> wrote: {Quote hidden}> I'm using the HI-TECH C Compiler LIte > - Xiao Xu > > > > On Fri, May 28, 2010 at 5:53 PM, Bruno L. Albrecht <EraseMEbrunolalbspam_OUTTakeThisOuTgmail.com> > wrote: > > compiler? > > In C18, it's PORTAbits.RA0=1; > > > > On Fri, May 28, 2010 at 6:31 PM, Xiao Xu <xiaoxu193spam_OUTgmail.com> wrote: > > > >> To set, for example RA0, to high in C, can you just do PORTA0=1? > >> - Xiao Xu > >> --

----- Original Message ----- From: "Xiao Xu" <@spam@xiaoxu193KILLspamgmail.com> To: "Microcontroller discussion list - Public." <KILLspampiclistKILLspammit.edu> Sent: Friday, May 28, 2010 11:13 PM Subject: Re: In C, how do you set a pin to high voltage? > I'm using the HI-TECH C Compiler LIte > - Xiao Xu Okay, there should be some examples/info in the documentation to get you going with things like this. However, I've only used it a couple of times, but I remember having trouble finding such basic info even in the bundled documentation. I *think* you can just use something like RA0 = 1; for individual bits. Give that a go too.

nope. I tried PORTAbits.RA0=1, PORTA.RA0=1. During debugging, I looked into the file register, and 0x05 (location for PORTA) never changed from 0. - Xiao Xu On Fri, May 28, 2010 at 5:53 PM, Bruno L. Albrecht <RemoveMEbrunolalbTakeThisOuTgmail.com> wrote: > compiler? > In C18, it's PORTAbits.RA0=1; > > On Fri, May 28, 2010 at 6:31 PM, Xiao Xu <spamBeGonexiaoxu193spamBeGonegmail.com> wrote: > >> To set, for example RA0, to high in C, can you just do PORTA0=1? >> - Xiao Xu >> --

btw, here is my code if it helps: #include <pic.h> void main() { RA0=1; PORTAbits.RA0=1; NOP(); } the 0-bit of PORTA(0x05 for 16F684) refuse to turn into 1! - Xiao Xu On Fri, May 28, 2010 at 8:13 PM, Xiao Xu <TakeThisOuTxiaoxu193EraseMEspam_OUTgmail.com> wrote: {Quote hidden}> nope. I tried PORTAbits.RA0=1, PORTA.RA0=1. > During debugging, I looked into the file register, and 0x05 (location > for PORTA) never changed from 0. > > > - Xiao Xu > > > > On Fri, May 28, 2010 at 5:53 PM, Bruno L. Albrecht <RemoveMEbrunolalbTakeThisOuTgmail.com> wrote: >> compiler? >> In C18, it's PORTAbits.RA0=1; >> >> On Fri, May 28, 2010 at 6:31 PM, Xiao Xu <xiaoxu193EraseME.....gmail.com> wrote: >> >>> To set, for example RA0, to high in C, can you just do PORTA0=1? >>> - Xiao Xu >>> --

Something like this might work ( I assume you have the various config bits set properly? watchdog timer off etc): #include <pic.h> void main() { PORTA = 0x00; TRISA = 0x00; RA0=1; while(1); // wait here }

For what its worth, I don't see anything that sets the TRIS bits for that port. Or is that something that the compiler is supposed to take care of? dwayne At 06:14 PM 5/28/2010, Xiao Xu wrote: {Quote hidden}>btw, here is my code if it helps: > >#include <pic.h> >void main() >{ > >RA0=1; >PORTAbits.RA0=1; >NOP(); >} > >the 0-bit of PORTA(0x05 for 16F684) refuse to turn into 1! > >- Xiao Xu -- Dwayne Reid <EraseMEdwaynerplanet.eon.net> Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax http://www.trinity-electronics.com Custom Electronics Design and Manufacturing

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