On 23/07/2014 12:20 PM, James Cameron wrote:
> On Tue, Jul 22, 2014 at 12:20:10PM +0200, Jan-Erik Soderholm wrote:
>> James Cameron wrote 2014-07-22 08:20:
>>
>>>>      T1CON                 =3D 0x31;
>>> This is where you have set the prescaler, though it is not obvious
>>> that you have done so, because it is hiding in the register.  Another
>>> way to put it would be:
>>>
>>> T1GINC =3D 0;
>>> TMR1GE =3D 0;
>>> T1CKPS1 =3D 1;
>>> T1CKPS0 =3D 1;
>>> T1OSCEN =3D 0;
>>> T1SYNC =3D 0;
>>> TMR1CS =3D 0;
>>> TMR1ON =3D 1;
>>>
>> Note that XC8 also has definitions in the device header files
>> for "multiple bit fields" (like the prescaler in the case of
>> T1CON) in control registers. The above can also be written:
>>
>> T1CONbits.T1GINC  =3D 0;
>> T1CONbits.TMR1GE  =3D 0;
>> T1CONbits.T1CKPS  =3D 0b11;
>> T1CONbits.T1OSCEN =3D 0;
>> T1CONbits.T1SYNC  =3D 0;
>> T1CONbits.TMR1CS  =3D 0;
>> T1CONbits.TMR1ON  =3D 1;
> Yes, I guessed that both were possible, and for multiple bit fields
> there is some advantage, but apart from that is there any other reason
> for using the longer form over the shorter form?
>
> Is there a form where this can be written:
>
> T1CKPS =3D 0b11;
>

BTW, You can use CTRL+Space to show you the possible options after=20
typing up to the decimal point.
David...

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David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
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