Accessing single bit of a register on dsPIC30F5015

[stoyanoff]

Greetings! I'm using the motor control unit of dsPIC30F5015. I need to access it's registers bit by bit. I'm accessing entire registers this way:

[asmboy]

all 16 bits of a #word
all 8 bits of a #byte
all 1 bit of a #bit


#bit mybit=word.5 //for example OR
#bit myothebit=0xFD.3

as stated in the CCS manual

or in your example
#bit bitsy3=PWMCON2.3 // bit 3
#bit bitsy11=PWMCON2.11 // bit 11 and so on

[Ttelmah]

First, have a look at this thread:

<http://www.ccsinfo.com/forum/viewtopic.php?t=54824>

Using the union as shown here, will allow you to access multiple bits as if they are a single variable (particularly useful for the SEVOPS bits)

Then realise that you can also use #BIT

So:

#bit PWCON2BIT0=PWMCON2.0
(after PWMCON2 is declared)

and the compiler can also access the bits in SFR's by name.

So:

#bit UDIS=getenv("BIT:UDIS")

UDIS, QSYNC, IUE, SEVOPS0, 1, 2 & 3 are all known

[stoyanoff]

10x