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Can SFRs and Sbits be defined as volatile?

sbit P07 = 0x87;
void main()
{
while(P07);    // End Program unless we get error
printf("Error - line went low");  // Print Error being recieved
for(;;)        // End after Error
}

Problem is that it never gets out of the first while loop even when P07 (Port 0, pin 7) changes states. I am using DS2252T which allows ports to be bit addressable. What am I doing wrong?

Thanks

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0 Andy Neil over 23 years ago

Are you sure that it's never getting out of the loop; could it just be that your printf is not working?

I think that volatile is implicit in SFR & sbit definitions?
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0 Andy Neil over 23 years ago

Are you sure that it's never getting out of the loop; could it just be that your printf is not working?

I think that volatile is implicit in SFR & sbit definitions?
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