Re: newbee question

On 2/28/2013 9:41 PM, Sylvain Bissonnette wrote:
>
> Hi
>
>    I'm comming from another world of MCU and I'm at the beginning of
> my long lurning curve,  Here is what I'm trying to do:
>
> The main question is why nothing work...
>
> #define RS      1   
> #define RS_SET          BitWrPortI(PCDR, &PCDRShadow, 1, RS);
> #define RS_CLR          BitWrPortI(PCDR, &PCDRShadow, 0, RS);
>
> main()
> {  
>    int i;
>
>    for (i=0;i<7;i++)
>    {
>      //BitWrPortI(PADDR,&PADDRShadow,1,(1<<i)); why this line don't
> compile?
>       BitWrPortI(PBDDR,&PBDDRShadow,1,(1<<i));
>       BitWrPortI(PCDDR,&PCDDRShadow,1,(1<<i));
>    }
>
>   while(1)
>   {
>   
>    RS_SET; 
>    WrPortI(PADR,    &PADRShadow,i++);    
>    RS_CLR;  
>    }
> }

You need to set port A as an output, look at the SPCR docs:

At start, add WrPortI(SPCE,SPCRShadow,0x84);

-- 
------------------------------------------
     Scott G. Henion, Consultant
Web site:    http://SHDesigns.org
------------------------------------------