python file API

[Thomas Rachel]

Am 25.09.2012 10:13 schrieb Dennis Lee Bieber:
>> Or some bit setting registers, like on ATxmega: OUT = 0x10 sets bit 7
>> and clears all others, OUTSET = 0x10 only sets bit 7, OUTTGL = 0x10
>> toggles it and OUTCLR = 0x10 clears it.

Umpfzg. s/bit 7/bit 4/.

> 	I don't think I'd want to work with any device where 0x10 (00010000
> binary) modifies bit SEVEN. 0x40, OTOH, would fit my mental impression
> of bit 7.

Of course. My fault.

It can as well be a bit mask, with OUTTGL = 0x11 toggling bit 4 and bit 
0. Very handy sometimes.


Thomas